Preoperative care: Difference between revisions

From Citizendium
Jump to navigation Jump to search
imported>Robert Badgett
mNo edit summary
 
(134 intermediate revisions by 5 users not shown)
Line 1: Line 1:
{{subpages}}
{{subpages}}
'''Preoperative care''' is defined as "Care given during the period prior to undergoing surgery when psychological and physical preparations are made according to the special needs of the individual patient. This period spans the time between admission to the hospital to the time the surgery begins."<ref name="title">{{cite web |url=http://www.nlm.nih.gov/cgi/mesh/2007/MB_cgi?term=preoperative+care |title=Preoperative care |accessdate=2007-11-21 |author=National Library of Medicine |authorlink= |coauthors= |date= |format= |work= |publisher= |pages= |language= |archiveurl= |archivedate= |quote=}}</ref>
{{TOC|right}}
:See also [[perioperative care]]
'''Preoperative care''' is defined as "Care given during the period prior to undergoing surgery when psychological and physical preparations are made according to the special needs of the individual patient. This period spans the time between admission to the hospital to the time the surgery begins."<ref name="title">{{cite web |url=http://www.nlm.nih.gov/cgi/mesh/2007/MB_cgi?term=preoperative+care |title=Preoperative care |accessdate=2007-11-21 |author=National Library of Medicine |authorlink= |coauthors= |date= |format= |work= |publisher= |pages= |language= |archiveurl= |archivedate= |quote=}}</ref><ref>{{Cite journal
| doi = 10.1007/s11606-009-0965-1
| volume = 24
| issue = 7
| pages = 863-871
| last = Jaffer
| first = Amir
| coauthors = Gerald Smetana, Steven Cohn, Barbara Slawski
| title = Perioperative Medicine Update
| journal = Journal of General Internal Medicine
| accessdate = 2009-06-16
| date = 2009-07-01
| url = http://dx.doi.org/10.1007/s11606-009-0965-1
}}</ref>


==Components of preoperative care==
==Components of preoperative care==
[[Clinical prediction rule]]s are available for predicting all cause mortality.<ref name="pmid22418007">{{cite journal| author=Glance LG, Lustik SJ, Hannan EL, Osler TM, Mukamel DB, Qian F et al.| title=The Surgical Mortality Probability Model: derivation and validation of a simple risk prediction rule for noncardiac surgery. | journal=Ann Surg | year= 2012 | volume= 255 | issue= 4 | pages= 696-702 | pmid=22418007 | doi=10.1097/SLA.0b013e31824b45af | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=22418007  }} </ref><ref name="pmid21519230">{{cite journal| author=Dalton JE, Kurz A, Turan A, Mascha EJ, Sessler DI, Saager L| title=Development and Validation of a Risk Quantification Index for 30-Day Postoperative Mortality and Morbidity in Noncardiac Surgical Patients. | journal=Anesthesiology | year= 2011 | volume= 114 | issue= 6 | pages= 1336-1344 | pmid=21519230 | doi=10.1097/ALN.0b013e318219d5f9 | pmc= | url= }} </ref>
===Cardiac risk reduction===
===Cardiac risk reduction===
====Clinical practice guidelines====
====Clinical practice guidelines====
[[Clinical practice guideline]]s<ref name="pmid17901356">{{cite journal |author=Fleisher LA, Beckman JA, Brown KA, ''et al'' |title=ACC/AHA 2007 Guidelines on Perioperative Cardiovascular Evaluation and Care for Noncardiac Surgery: Executive Summary: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the 2002 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery): Developed in Collaboration With the American Society of Echocardiography, American Society of Nuclear Cardiology, Heart Rhythm Society, Society of Cardiovascular Anesthesiologists, Society for Cardiovascular Angiography and Interventions, Society for Vascular Medicine and Biology, and Society for Vascular Surgery |journal=Circulation |volume=116 |issue=17 |pages=1971–1996 |year=2007 |pmid=17901356 |doi=10.1161/CIRCULATIONAHA.107.185700 |issn=}}</ref> by the American College of Cardiology (ACC) and American Heart Association (AHA) recommend (as summarized by [http://www.jwatch.org/ Journal Watch]:<ref name="JWatchGeneral">{{Cite web | title = Guidelines for Perioperative Cardiovascular Evaluation for Patients Considering Noncardiac Surgery |author=Brett AS | accessdate = 2007-11-21 | date = 2007-11-20 | url = http://general-medicine.jwatch.org/cgi/content/full/2007/1120/2 }}</ref><ref name="JWHospitalMedicine">{{Cite web | title = Current Guidelines for Preoperative Management Leave Me Wanting More |author=Winawer N | accessdate = 2007-11-21 | date = 2008-08-25 | url = http://hospital-medicine.jwatch.org/cgi/content/full/2008/825/1 }</ref>
[[Clinical practice guideline]]s are available that have been updated in 2014<ref name="pmid25091544">{{cite journal| author=Fleisher LA, Fleischmann KE, Auerbach AD, Barnason SA, Beckman JA, Bozkurt B et al.| title=2014 ACC/AHA Guideline on Perioperative Cardiovascular Evaluation and Management of Patients Undergoing Noncardiac Surgery: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines. | journal=J Am Coll Cardiol | year= 2014 | volume=  | issue=  | pages=  | pmid=25091544 | doi=10.1016/j.jacc.2014.07.944 | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=25091544  }} </ref>, 2009<ref name="pmid19713421">{{cite journal| author=Poldermans D, Bax JJ, Boersma E, De Hert S, Eeckhout E et al.| title=Guidelines for pre-operative cardiac risk assessment and perioperative cardiac management in non-cardiac surgery: The Task Force for Preoperative Cardiac Risk Assessment and Perioperative Cardiac Management in Non-cardiac Surgery of the European Society of Cardiology (ESC) and endorsed by the European Society of Anaesthesiology (ESA). | journal=Eur Heart J | year= 2009 | volume=  | issue=  | pages=  | pmid=19713421
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=19713421 | doi=10.1093/eurheartj/ehp337 }} </ref><ref name="pmid19884473">{{cite journal| author=Fleisher LA, Beckman JA, Brown KA, Calkins H, Chaikof EL, Fleischmann KE et al.| title=2009 ACCF/AHA focused update on perioperative beta blockade incorporated into the ACC/AHA 2007 guidelines on perioperative cardiovascular evaluation and care for noncardiac surgery: a report of the American college of cardiology foundation/American heart association task force on practice guidelines. | journal=Circulation | year= 2009 | volume= 120 | issue= 21 | pages= e169-276 | pmid=19884473 | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=clinical.uthscsa.edu/cite&email=badgett@uthscdsa.edu&retmode=ref&cmd=prlinks&id=19884473 | doi=10.1161/CIRCULATIONAHA.109.192690 }} </ref>, 2007<ref name="pmid17901356"/>, and 2002<ref name="pmid11889023">{{cite journal| author=Eagle KA, Berger PB, Calkins H, Chaitman BR, Ewy GA, Fleischmann KE et al.| title=ACC/AHA guideline update for perioperative cardiovascular evaluation for noncardiac surgery---executive summary a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Committee to Update the 1996 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery). | journal=Circulation | year= 2002 | volume= 105 | issue= 10 | pages= 1257-67 | pmid=11889023 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=11889023  }} </ref>. Guidelines by the American College of Cardiology (ACC) and American Heart Association (AHA) recommend (as summarized by [http://www.jwatch.org/ Journal Watch]:<ref name="JWatchGeneral">{{cite web | title = Guidelines for Perioperative Cardiovascular Evaluation for Patients Considering Noncardiac Surgery |author=Brett AS | accessdate = 2007-11-21 | date = 2007-11-20 | url = http://general-medicine.jwatch.org/cgi/content/full/2007/1120/2 }}</ref><ref name="JWHospitalMedicine">{{cite web | title = Current Guidelines for Preoperative Management Leave Me Wanting More |author=Winawer N | accessdate = 2007-11-21 | date = 2008-08-25 | url = http://hospital-medicine.jwatch.org/cgi/content/full/2008/825/1}}</ref>
* 'Noninvasive stress testing of patients with 3 or more clinical risk factors and poor functional capacity (less than 4 [[metabolic equivalent]]s METs) who require vascular surgery is reasonable if it will change management"<ref name="pmid17901356"/>
* 'Noninvasive stress testing of patients with 3 or more clinical risk factors and poor functional capacity (less than 4 [[metabolic equivalent]]s METs) who require vascular surgery is reasonable if it will change management"<ref name="pmid17901356"/>
* "Patients scheduled for low-risk noncardiac surgery should proceed to surgery."<ref name="JWatchGeneral"/>
* "Patients scheduled for low-risk noncardiac surgery should proceed to surgery."<ref name="JWatchGeneral"/>
Line 17: Line 35:
** Severe valvular disease such as severe [[aortic valve stenosis]] (mean pressure gradient greater than 40 mm Hg, aortic valve area less than 1.0 cm2, or symptomatic) and symptomatic [[mitral stenosis]]
** Severe valvular disease such as severe [[aortic valve stenosis]] (mean pressure gradient greater than 40 mm Hg, aortic valve area less than 1.0 cm2, or symptomatic) and symptomatic [[mitral stenosis]]


=====Emerging issues=====
====Cardiac risk assessment====
"Noncardiac surgery should be delayed until at least 30 days (and perhaps even 90 days) after placement of bare-metal coronary stents and 1 year after placement of drug-eluting stents."<ref name="urlNoncardiac Surgery in Patients with Recently Implanted Coronary Stents - Journal Watch (General)">{{cite web |url=http://general-medicine.jwatch.org/cgi/content/full/2008/1016/3 |title=Noncardiac Surgery in Patients with Recently Implanted Coronary Stents - Journal Watch (General) |author=Brett AS |authorlink= |coauthors= |date=2008 |format= |work= |publisher=Journal Watch (General) |pages= |language= |archiveurl= |archivedate= |quote= |accessdate=}}</ref><ref name="pmid18813036">{{cite journal |author=Nuttall GA, Brown MJ, Stombaugh JW, ''et al'' |title=Time and cardiac risk of surgery after bare-metal stent percutaneous coronary intervention |journal=Anesthesiology |volume=109 |issue=4 |pages=588–95 |year=2008 |month=October |pmid=18813036 |doi=10.1097/ALN.0b013e318186ddf8 |url=http://meta.wkhealth.com/pt/pt-core/template-journal/lwwgateway/media/landingpage.htm?an=00000542-200810000-00005 |issn=}}</ref>
Self reported poor functional capacity, defined as inability to walk 4 blocks and climb 2 flights of stairs, increases the risk of cardiac complications in non-cardiac surgery from 5.2% to 9.6%.<ref name="pmid10527296">{{cite journal |author=Reilly DF, McNeely MJ, Doerner D, ''et al'' |title=Self-reported exercise tolerance and the risk of serious perioperative complications |journal=Arch. Intern. Med. |volume=159 |issue=18 |pages=2185–92 |year=1999 |month=October |pmid=10527296 |doi= |url=http://archinte.ama-assn.org/cgi/pmidlookup?view=long&pmid=10527296 |issn=}}</ref> The accuracy of this question is:


====Evidence for interventions====
{| class="wikitable" align="right"
 
|+ The accuracy of self reported poor functional capacity
=====Perioperative ß-blockade=====
! &nbsp; !! [[Sensitivity and specificity|Sensitivity]]!! [[Sensitivity and specificity|Specificity]]
{|align="right" class="wikitable"
|+ Comparison of the POISE, MSPI, and DECREASE trials of<br>[[adrenergic beta-antagonist|beta-blockers]] for noncardiac surgery
! !!POISE trial<ref name="pmid18479744">{{cite journal |author= |title=Effects of extended-release metoprolol succinate in patients undergoing non-cardiac surgery (POISE trial): a randomised controlled trial |journal=Lancet |volume= |issue= |pages= |year=2008 |month=May |pmid=18479744 |doi=10.1016/S0140-6736(08)60601-7 |url=http://linkinghub.elsevier.com/retrieve/pii/S0140-6736(08)60601-7 |issn=}}</ref>!! MSPI study<ref name="pmid8929262">{{cite journal |author=Mangano DT, Layug EL, Wallace A, Tateo I |title=Effect of atenolol on mortality and cardiovascular morbidity after noncardiac surgery. Multicenter Study of Perioperative Ischemia Research Group |journal=N. Engl. J. Med. |volume=335 |issue=23 |pages=1713-20 |year=1996 |pmid=8929262 |doi=|url=http://content.nejm.org/cgi/content/full/335/23/1713}}</ref><ref name="pmid9447850">{{cite journal |author=Wallace A, Layug B, Tateo I, ''et al'' |title=Prophylactic atenolol reduces postoperative myocardial ischemia. McSPI Research Group |journal=Anesthesiology |volume=88 |issue=1 |pages=7–17 |year=1998 |month=January |pmid=9447850 |doi= |url=http://meta.wkhealth.com/pt/pt-core/template-journal/lwwgateway/media/landingpage.htm?issn=0003-3022&volume=88&issue=1&spage=7 |issn=}}</ref>!!DECREASE Study<ref name="pmid10588963">{{cite journal |author=Poldermans D, Boersma E, Bax JJ, ''et al'' |title=The effect of bisoprolol on perioperative mortality and myocardial infarction in high-risk patients undergoing vascular surgery. Dutch Echocardiographic Cardiac Risk Evaluation Applying Stress Echocardiography Study Group |journal=N. Engl. J. Med. |volume=341 |issue=24 |pages=1789-94 |year=1999 |pmid=10588963 |doi=|url=http://content.nejm.org/cgi/content/full/341/24/1789}}</ref>
|-
|-
| Total patients||align=center|8351|| align=center|200||align=center| 173<br/>(all had positive results on dobutamine echocardiography [[stress test]])
| Any serious complication || 71%|| 47%
|-
|-
| Proportion of patients<br>undergoing vascular surgery||align=center|42%|| align=center|41%||align=center|100%
| Serious cardiac complication|| 70%|| 45%
|-
|}
| Risk of bias according to the [[Cochrane Collaboration]] bias scale<ref>Higgins JPT, Green S (editors). [http://www.mrc-bsu.cam.ac.uk/cochrane/handbook/chapter_8/table_8_5_a_the_cochrane_collaborations_tool_for_assessing.htm Table 8.5.a: The Cochrane Collaboration's Tool for assessing risk of bias]. [http://www.cochrane-handbook.org/ Cochrane Handbook for Systematic Reviews of Interventions] Version 5.0.1 [updated September 2008]. The Cochrane Collaboration, 2008. Available from [http://www.cochrane-handbook.org/ www.cochrane-handbook.org].</ref> as assigned by Bangalore et al.<ref name="pmid19012955">{{cite journal |author=Bangalore S, Wetterslev J, Pranesh S, Sawhney S, Gluud C, Messerli FH |title=Perioperative beta blockers in patients having non-cardiac surgery: a meta-analysis |journal=Lancet |volume=372 |issue=9654 |pages=1962–76 |year=2008 |month=December |pmid=19012955 |doi=10.1016/S0140-6736(08)61560-3 |url=http://linkinghub.elsevier.com/retrieve/pii/S0140-6736(08)61560-3 |issn=}}</ref>||align=center|high|| align=center|low||align=center|low
 
|-
=====Revised Cardiac Risk Index=====
| [[adrenergic beta-antagonist|Beta-blocker]] dose|| Intravenous oral [[metoprolol]] tartrate followed by [[metoprolol]] succinate 200 mg/day||[[Atenolol]] 50 to 100 mg/day ||[[Bisoprolol]] 5 to 10 mg/day
{{main|Revised Cardiac Risk Index}}
|-
The [[Revised Cardiac Risk Index]] (RCRI) can help estimate probability of cardiac complications.<ref name="pmid20048269">{{cite journal| author=Ford MK, Beattie WS, Wijeysundera DN| title=Systematic review: prediction of perioperative cardiac complications and mortality by the revised cardiac risk index. | journal=Ann Intern Med | year= 2010 | volume= 152 | issue= 1 | pages= 26-35 | pmid=20048269
| Goal pulse rate||align=center| 50 to 80 <br/>(allowed delayed dosing when pulse 45 to 49)||align=center| 55 to 65  ||align=center| 50 to 60<br/>(started [[Bisoprolol]] one week preoperatively)
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=clinical.uthscsa.edu/cite&email=badgett@uthscdsa.edu&retmode=ref&cmd=prlinks&id=20048269 | doi=10.1059/0003-4819-152-1-201001050-00007 }}</ref>
|-
 
| Significant bradycardia<br>in beta-blocker group||align=center|4.2%<br>(requiring treatment or stopping<br>of metoprolol)|| align=center|0%<br>(requiring stopping<br>of atenolol)||align=center|Not reported
=====Eagle criteria=====
|-
The Eagle criteria (Q waves, history of ventricular ectopic activity, diabetes, advanced age, angina) can help assess risk in combination with [[stress test]]ing.<ref name="pmid2655519">{{cite journal |author=Eagle KA, Coley CM, Newell JB, ''et al'' |title=Combining clinical and thallium data optimizes preoperative assessment of cardiac risk before major vascular surgery |journal=Ann. Intern. Med. |volume=110 |issue=11 |pages=859–66 |year=1989 |month=June |pmid=2655519 |doi= |url= |issn=}}</ref> Eagle et al propose that [[stress test]]ing is most appropriate for patients with one or two of the five criteria. [[Myocardial revascularization]] before vascular surgery may help patients with at least 3 Eagle criteria.<ref name="pmid15625331">{{cite journal |author=McFalls EO, Ward HB, Moritz TE, ''et al'' |title=Coronary-artery revascularization before elective major vascular surgery |journal=N. Engl. J. Med. |volume=351 |issue=27 |pages=2795–804 |year=2004 |month=December |pmid=15625331 |doi=10.1056/NEJMoa041905 |url=http://content.nejm.org/cgi/pmidlookup?view=short&pmid=15625331&promo=ONFLNS19 |issn=}}</ref>
! colspan="4"| Short-term mortality
 
=====Echocardiography=====
Routine [[echocardiography]] for non-cardiac surgery may not be helpful.<ref name="pmid21724560">{{cite journal| author=Wijeysundera DN, Beattie WS, Karkouti K, Neuman MD, Austin PC, Laupacis A| title=Association of Echocardiography Before Major Elective Non-Cardiac Surgery With Postoperative Survival and Length of Hospital Stay: Population Based Cohort Study. | journal=BMJ | year= 2011 | volume= 342 | issue=  | pages= d3695 | pmid=21724560 | doi=10.1136/bmj.d3695 | pmc=PMC3127454 | url= }} </ref>
 
=====Stress testing=====
Dobutamine echocardiography [[stress test]]ing may be the most [[sensitivity and specificity|sensitive]] non-invasive test.<ref name="pmid14594892">{{cite journal |author=Kertai MD, Boersma E, Bax JJ, ''et al'' |title=A meta-analysis comparing the prognostic accuracy of six diagnostic tests for predicting perioperative cardiac risk in patients undergoing major vascular surgery |journal=Heart |volume=89 |issue=11 |pages=1327–34 |year=2003 |month=November |pmid=14594892 |pmc=1767930 |doi= |url=http://heart.bmj.com/cgi/pmidlookup?view=long&pmid=14594892 |issn=}}</ref> Dobutamine echocardiography has been used to indicate patients who might benefit from perioperative [[adrenergic beta-antagonist|beta-blockers]].<ref name="pmid10588963">{{cite journal |author=Poldermans D, Boersma E, Bax JJ, ''et al'' |title=The effect of bisoprolol on perioperative mortality and myocardial infarction in high-risk patients undergoing vascular surgery. Dutch Echocardiographic Cardiac Risk Evaluation Applying Stress Echocardiography Study Group |journal=N. Engl. J. Med. |volume=341 |issue=24 |pages=1789-94 |year=1999 |pmid=10588963 |doi=|url=http://content.nejm.org/cgi/content/full/341/24/1789}}</ref><ref name="pmid11308400">{{cite journal |author=Boersma E, Poldermans D, Bax JJ, ''et al'' |title=Predictors of cardiac events after major vascular surgery: Role of clinical characteristics, dobutamine echocardiography, and beta-blocker therapy |journal=JAMA |volume=285 |issue=14 |pages=1865–73 |year=2001 |month=April |pmid=11308400 |doi= |url=http://jama.ama-assn.org/cgi/pmidlookup?view=long&pmid=11308400 |issn=}}</ref>
 
=====Cardiac risk by type of surgery=====
{| class="wikitable"
|+ Cardiac risk stratification for noncardiac surgeries. See also [http://circ.ahajournals.org/cgi/content/full/100/10/1043/F1 Figure 1] of Lee et al.<ref name="pmid10477528">{{cite journal |author=Lee TH, Marcantonio ER, Mangione CM, ''et al'' |title=Derivation and prospective validation of a simple index for prediction of cardiac risk of major noncardiac surgery |journal=Circulation |volume=100 |issue=10 |pages=1043–9 |year=1999 |pmid=10477528 |doi= |issn=}}</ref>
!  style="background-color:#FFFFCC;vertical-align:text-top;"|2007 ACC/AHA Guidelines<br/>(from their [http://circ.ahajournals.org/cgi/content/full/116/17/1971/TBL4185700 Table 4]<ref name="pmid17901356"/>)!! 2002 ACC/AHA Guidelines<br/>(from their [http://circ.ahajournals.org/content/116/17/1971/T3.expansion.html Table 3]<ref name="pmid11889023a">Cardiology/American Heart Association Task Force on Practice Guidelines (Committee to Update the 1996 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery). [http://circ.ahajournals.org/cgi/content/full/105/10/1257 ACC/AHA guideline update for perioperative cardiovascular evaluation for noncardiac surgery---executive summary a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Committee to Update the 1996 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery)]. Circulation. 2002 Mar 12;105(10):1257-67. Erratum in: Circulation. 2006 Jun 6;113(22):e846. PMID 11889023]</ref>)!!Boersma 2005<ref name="pmid16194645">{{cite journal |author=Boersma E, Kertai MD, Schouten O, ''et al.'' |title=Perioperative cardiovascular mortality in noncardiac surgery: validation of the Lee cardiac risk index |journal=Am. J. Med. |volume=118 |issue=10 |pages=1134–41 |year=2005 |month=October |pmid=16194645 |doi=10.1016/j.amjmed.2005.01.064 |url=http://linkinghub.elsevier.com/retrieve/pii/S0002-9343(05)00170-1 |issn=}}</ref>!! [[Revised Cardiac Risk Index|RCRI]] (1999)<ref name="pmid10477528"/>
|-
|-
| Beta-blocker group||align=center style="background:red"|3.1%<br>(death at two weeks)||align=center style="background:red"|4%<br>(in hospital death)||align=center style="background:lightgreen"|3.4%<br>(within 30 days)
| style="background-color:#FFFFCC;vertical-align:text-top;"|'''Vascular''' (reported cardiac risk often more than 5%):<br/>&bull;&nbsp;Aortic and other major vascular surgery<br/>&bull;&nbsp;Peripheral vascular surgery || style="vertical-align:text-top;"|'''High''' (Reported cardiac risk often greater than 5%):<br/>&bull;&nbsp;Emergent major operations, particularly in the elderly<br/>&bull;&nbsp;Aortic and other major vascular surgery<br/>&bull;&nbsp;Peripheral vascular surgery<br/>&bull;&nbsp;Anticipated prolonged surgical procedures associated with large fluid shifts and/or blood loss||style="vertical-align:text-top;"| '''High''':<br/>&bull;&nbsp;Aortic||style="vertical-align:text-top;"|'''High''':<br/>&bull;&nbsp;Intraperitoneal<br/>&bull;&nbsp;Intrathoracic<br/>&bull;&nbsp;Vascular surgery above the inguinal ligaments (excluding [[Carotid endarterectomy|carotid]]s and arms)
|-
|-
| Placebo group||align=center style="background:red"|2.3%<br>(death at two weeks)||align=center style="background:red"|2%<br>(in hospital death)||align=center style="background:lightgreen"|17%<br>(within 30 days)
| style="background-color:#FFFFCC;vertical-align:text-top;"|'''Intermediate''' (reported cardiac risk generally 1% to 5%):<br/>&bull;&nbsp;Intraperitoneal and intrathoracic surgery<br/>&bull;&nbsp;[[Carotid endarterectomy]]<br/>&bull;&nbsp;Head and neck surgery<br/>&bull;&nbsp;Orthopedic surgery<br/>&bull;&nbsp;Prostate surgery|| style="vertical-align:text-top;"|'''Intermediate''' (Reported cardiac risk generally less than 5%):<br/>&bull;&nbsp;[[Carotid endarterectomy]]<br/>&bull;&nbsp;Head and neck surgery<br/>&bull;&nbsp;Intraperitoneal and intrathoracic surgery<br/>&bull;&nbsp;Orthopedic surgery<br/>&bull;&nbsp;Prostate surgery||'''Intermediate-high risk''':<br/>&bull;&nbsp;abdominal<br/>&bull;&nbsp;ear, nose, throat<br/>&bull;&nbsp;neurologic<br/>&bull;&nbsp;pulmonary<br/>&bull;&nbsp;renal transplant<br/>&bull;&nbsp;vascular (excluding aortic and [[Carotid endarterectomy|carotid]])<br/>'''Low-intermediate risk''':<br/>&bull;&nbsp;orthopedic<br/>&bull;&nbsp;urologic || rowspan="2"|&nbsp;
|-
|-
| colspan="4"|Notes:<br/>1. [[Metoprolol]] is the only one of these [[adrenergic beta-antagonist]]s that is metabolized by [[cytochrome P-450]] [http://www.ncbi.nlm.nih.gov/sites/entrez/?db=gene&cmd=Retrieve&dopt=summary&list_uids=1565 2D6] [[allele]]. 3-10% of anglos are poor metabolizers of drugs that use the CYP2D6 [[isoenzyme]].<ref name="pmid11710893">{{cite journal |author=Phillips KA, Veenstra DL, Oren E, Lee JK, Sadee W |title=Potential role of pharmacogenomics in reducing adverse drug reactions: a systematic review |journal=JAMA |volume=286 |issue=18 |pages=2270–9 |year=2001 |month=November |pmid=11710893 |doi= |url=http://jama.ama-assn.org/cgi/pmidlookup?view=long&pmid=11710893 |issn=}}</ref> As a consequence, metoprolol has more variable effect than bisoprolol.<ref name="pmid16220080">{{cite journal |author=Nozawa T, Taguchi M, Tahara K, ''et al'' |title=Influence of CYP2D6 genotype on metoprolol plasma concentration and beta-adrenergic inhibition during long-term treatment: a comparison with bisoprolol |journal=J. Cardiovasc. Pharmacol. |volume=46 |issue=5 |pages=713–20 |year=2005 |month=November |pmid=16220080 |doi= |url=http://meta.wkhealth.com/pt/pt-core/template-journal/lwwgateway/media/landingpage.htm?issn=0160-2446&volume=46&issue=5&spage=713 |issn=}}</ref><br/>2. The MSPI study showed reduction in perioperative ischemia<ref name="pmid9447850">{{cite journal |author=Wallace A, Layug B, Tateo I, ''et al'' |title=Prophylactic atenolol reduces postoperative myocardial ischemia. McSPI Research Group |journal=Anesthesiology |volume=88 |issue=1 |pages=7–17 |year=1998 |month=January |pmid=9447850 |doi= |url=http://meta.wkhealth.com/pt/pt-core/template-journal/lwwgateway/media/landingpage.htm?issn=0003-3022&volume=88&issue=1&spage=7 |issn=}}</ref> and mortality at 6 months to two years<ref name="pmid8929262">{{cite journal |author=Mangano DT, Layug EL, Wallace A, Tateo I |title=Effect of atenolol on mortality and cardiovascular morbidity after noncardiac surgery. Multicenter Study of Perioperative Ischemia Research Group |journal=N. Engl. J. Med. |volume=335 |issue=23 |pages=1713-20 |year=1996 |pmid=8929262 |doi=|url=http://content.nejm.org/cgi/content/full/335/23/1713}}</ref>
| style="background-color:#FFFFCC;vertical-align:text-top;"|'''Low''' (reported cardiac risk generally less than 1%):<br/>&bull;&nbsp;Endoscopic procedures<br/>&bull;&nbsp;Superficial procedure<br/>&bull;&nbsp;Cataract surgery<br/>&bull;&nbsp;Breast surgery<br/>&bull;&nbsp;Ambulatory surgery || style="vertical-align:text-top;"|'''Low''' (Reported cardiac risk generally less than 1%):<br/>&bull;&nbsp;Endoscopic procedures<br/>&bull;&nbsp;Superficial procedure<br/>&bull;&nbsp;Cataract surgery<br/>&bull;&nbsp;Breast surgery||'''Low''':<br/>&bull;&nbsp;breast<br/>&bull;&nbsp;[[Carotid endarterectomy|carotid]]<br/>&bull;&nbsp;dental<br/>&bull;&nbsp;endocrine<br/>&bull;&nbsp;eye<br/>&bull;&nbsp;gynecology<br/>&bull;&nbsp;reconstructive
|}
|}


A [[meta-analysis]] of [[randomized controlled trial]]s found that [[adrenergic beta-antagonist|beta-blockers]] may cause a decrease in [[myocardial ischemia]] ([[number needed to treat]] = 16) with a lesser increase in non-fatal [[stroke]]s ([[number needed to harm]] [NNH] = 293).<ref name="pmid19012955">{{cite journal |author=Bangalore S, Wetterslev J, Pranesh S, Sawhney S, Gluud C, Messerli FH |title=Perioperative beta blockers in patients having non-cardiac surgery: a meta-analysis |journal=Lancet |volume=372 |issue=9654 |pages=1962–76 |year=2008 |month=December |pmid=19012955 |doi=10.1016/S0140-6736(08)61560-3 |url=http://linkinghub.elsevier.com/retrieve/pii/S0140-6736(08)61560-3 |issn=}}</ref>
=====Brain natriuretic peptide=====
The [[brain natriuretic peptide]] (BNP) when elevated about levels ranging from 40 to 533, may help predict complications.<ref name="pmid19833258">{{cite journal| author=Karthikeyan G, Moncur RA, Levine O, Heels-Ansdell D, Chan MT, Alonso-Coello P et al.| title=Is a pre-operative brain natriuretic peptide or N-terminal pro-B-type natriuretic peptide measurement an independent predictor of adverse cardiovascular outcomes within 30 days of noncardiac surgery? A systematic review and meta-analysis of observational studies. | journal=J Am Coll Cardiol | year= 2009 | volume= 54 | issue= 17 | pages= 1599-606 | pmid=19833258
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=clinical.uthscsa.edu/cite&email=badgett@uthscdsa.edu&retmode=ref&cmd=prlinks&id=19833258 | doi=10.1016/j.jacc.2009.06.028 }} <!--Formatted by http://sumsearch.uthscsa.edu/cite/--></ref>
 
====Interventions====
=====Perioperative ß-blockade=====
: See [[Preoperative_care/Beta-blocker_evidence_table|Evidence table]]
An update in 2009 of the 2007 ACC/AHA [[clinical practice guideline]], also summarized in their [http://circ.ahajournals.org/cgi/content/full/120/21/e169/FIG1192690 Figure 1], recommends:<ref name="pmid19926021">{{cite journal| author=American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines. American Society of Echocardiography. American Society of Nuclear Cardiology. Heart Rhythm Society. Society of Cardiovascular Anesthesiologists. Society for Cardiovascular Angiography and Interventions et al.| title=2009 ACCF/AHA focused update on perioperative beta blockade. | journal=J Am Coll Cardiol | year= 2009 | volume= 54 | issue= 22 | pages= 2102-28 | pmid=19926021
| url=http://content.onlinejacc.org/cgi/content/short/54/22/2102 | doi=10.1016/j.jacc.2009.07.004 }} </ref>
# "Beta blockers should be continued in patients undergoing surgery who are receiving beta blockers for treatment of conditions with ACCF/AHA Class I guideline indications for the drugs."
# "Beta blockers titrated to heart rate and blood pressure are probably recommended for patients undergoing vascular surgery who are at high cardiac risk owing to coronary artery disease or the finding of cardiac ischemia on preoperative testing"
# Beta blockers titrated to heart rate and blood pressure are reasonable for patients in whom preoperative assessment for vascular surgery identifies high cardiac risk, as defined by the presence of more than 1 clinical risk factor."
* "Beta blockers titrated to heart rate and blood pressure are reasonable for patients in whom preoperative assessment identifies coronary artery disease or high cardiac risk, as defined by the presence of more than 1 clinical risk factor,* who are undergoing intermediate-risk surgery"
 
A [[meta-analysis]] of [[randomized controlled trial]]s found that [[adrenergic beta-antagonist|beta-blockers]] may cause a decrease in [[myocardial ischemia]] ([[number needed to treat]] = 16) with a lesser increase in non-fatal [[stroke]]s ([[number needed to harm]] [NNH] = 293).<ref name="pmid19012955">{{cite journal |author=Bangalore S, Wetterslev J, Pranesh S, Sawhney S, Gluud C, Messerli FH |title=Perioperative beta blockers in patients having non-cardiac surgery: a meta-analysis |journal=Lancet |volume=372 |issue=9654 |pages=1962–76 |year=2008 |month=December |pmid=19012955 |doi=10.1016/S0140-6736(08)61560-3 |url=http://linkinghub.elsevier.com/retrieve/pii/S0140-6736(08)61560-3 |issn=}}</ref> This meta-analysis found significant benefit on overall mortality for patients at high surgical risk (see yellow box for definition of risk categories) but there was no relationship to  medical risk categories. The meta-analysis did not regress outcome by mortality in the control groups.
 
Subsequent studies concluded that [[adrenergic beta-antagonist]]s if used chronically<ref name="pmid21427537">{{cite journal| author=Ellenberger C, Tait G, Beattie WS| title=Chronic β blockade is associated with a better outcome after elective noncardiac surgery than acute β blockade: a single-center propensity-matched cohort study. | journal=Anesthesiology | year= 2011 | volume= 114 | issue= 4 | pages= 817-23 | pmid=21427537 | doi=10.1097/ALN.0b013e31820fca0b | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=21427537  }} </ref> or started with adequate time before surgery<ref name="pmid19786861">{{cite journal| author=Poldermans D, Schouten O, van Lier F, Hoeks SE, van de Ven L, Stolker RJ et al.| title=Perioperative Strokes and beta-Blockade. | journal=Anesthesiology | year= 2009 | volume=  | issue=  | pages=  | pmid=19786861
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=19786861 | doi=10.1097/ALN.0b013e3181ba3bf4 }}</ref><ref name="pmid20693881">{{cite journal| author=Badgett RG, Lawrence VA, Cohn SL| title=Variations in pharmacology of beta-blockers may contribute to heterogeneous results in trials of perioperative beta-blockade. | journal=Anesthesiology | year= 2010 | volume= 113 | issue= 3 | pages= 585-92 | pmid=20693881 | doi=10.1097/ALN.0b013e3181e73eea | pmc= | url= }} </ref> and that chronic [[adrenergic beta-antagonist]]s may be better than episodic [[adrenergic beta-antagonist]]s<ref name="pmid21427537"/>.
 
[[Atenolol]] may be more effective than [[metoprolol]] according to non-randomized studies<ref name="pmid21372680">{{cite journal| author=Wallace AW, Au S, Cason BA| title=Perioperative β-Blockade: Atenolol Is Associated with Reduced Mortality When Compared to Metoprolol. | journal=Anesthesiology | year= 2011 | volume= 114 | issue= 4 | pages= 824-36 | pmid=21372680 | doi=10.1097/ALN.0b013e3182110e83 | pmc= | url= }} </ref><ref name="pmid16210252">{{cite journal| author=Redelmeier D, Scales D, Kopp A| title=Beta blockers for elective surgery in elderly patients: population based, retrospective cohort study. | journal=BMJ | year= 2005 | volume= 331 | issue= 7522 | pages= 932 | pmid=16210252 | doi=10.1136/bmj.38603.746944.3A | pmc=PMC1261186 | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=16210252  }} </ref> and a [[meta-analysis]] of [[randomized controlled trial]]s<ref name="pmid20693881">{{cite journal| author=Badgett RG, Lawrence VA, Cohn SL| title=Variations in pharmacology of beta-blockers may contribute to heterogeneous results in trials of perioperative beta-blockade. | journal=Anesthesiology | year= 2010 | volume= 113 | issue= 3 | pages= 585-92 | pmid=20693881 | doi=10.1097/ALN.0b013e3181e73eea | pmc= | url= }} </ref>.
 
======POISE trial======
======POISE trial======
Among the trials in the [[meta-analysis]] was the POISE trial.<ref name="pmid16875901">{{cite journal |author=Devereaux PJ, Yang H, Guyatt GH, ''et al'' |title=Rationale, design, and organization of the PeriOperative ISchemic Evaluation (POISE) trial: a randomized controlled trial of metoprolol versus placebo in patients undergoing noncardiac surgery |journal=Am. Heart J. |volume=152 |issue=2 |pages=223-30 |year=2006 |pmid=16875901 |doi=10.1016/j.ahj.2006.05.019}}</ref><ref name="pmid18479744">{{cite journal |author= |title=Effects of extended-release metoprolol succinate in patients undergoing non-cardiac surgery (POISE trial): a randomised controlled trial |journal=Lancet |volume= |issue= |pages= |year=2008 |month=May |pmid=18479744 |doi=10.1016/S0140-6736(08)60601-7 |url=http://linkinghub.elsevier.com/retrieve/pii/S0140-6736(08)60601-7 |issn=}}</ref>
The largest trial in the [[meta-analysis]] was the POISE trial.<ref name="pmid16875901">{{cite journal |author=Devereaux PJ, Yang H, Guyatt GH, ''et al'' |title=Rationale, design, and organization of the PeriOperative ISchemic Evaluation (POISE) trial: a randomized controlled trial of metoprolol versus placebo in patients undergoing noncardiac surgery |journal=Am. Heart J. |volume=152 |issue=2 |pages=223-30 |year=2006 |pmid=16875901 |doi=10.1016/j.ahj.2006.05.019}}</ref><ref name="pmid18479744">{{cite journal |author= |title=Effects of extended-release metoprolol succinate in patients undergoing non-cardiac surgery (POISE trial): a randomised controlled trial |journal=Lancet |volume= |issue= |pages= |year=2008 |month=May |pmid=18479744 |doi=10.1016/S0140-6736(08)60601-7 |url=http://linkinghub.elsevier.com/retrieve/pii/S0140-6736(08)60601-7 |issn=}}</ref> Most participants underwent vascular (42%),  intraabdominal (23%), or orthopedic (19%) surgery."
The patient population in the trial, as noted in an earlier methods paper by the authors:<ref name="pmid16875901"/>


:"The POISE trial has recruited >6300 patients in 182 centers in 21 countries. Currently, the patients' mean age is 69 years; 63% are males, 43% have a history  of coronary artery disease, 43% have a history of peripheral arterial disease,  and 30% have diabetes. Most participants have undergone vascular (42%),  intraabdominal (23%), or orthopedic (19%) surgery."
{| class="wikitable" align="right"
|+ Comparison of POISE risk factors and [[Revised Cardiac Risk Index]]
! &nbsp;!!POISE!![[Revised Cardiac Risk Index]]
|-
| valign="top"|Risk factors in common||valign="top"|&bull;&nbsp;undergoing intrathoracic or intraperitoneal surgery<br/>&bull;&nbsp;[[heart failure]]<br/>&bull;&nbsp;transient ischaemic attack<br/>&bull;&nbsp;[[diabetes mellitus]]<br/>&bull;&nbsp;serum creatinine > 175 μmol/L (2.0 mg/dL)  || valign="top"|&bull;&nbsp;high-risk surgery (intraperitoneal, intrathoracic, or vascular surgery above the inguinal ligaments)<br/>&bull;&nbsp;[[heart failure]]<br/>&bull;&nbsp;cerebrovascular disease<br/>&bull;&nbsp;preoperative treatment with [[insulin]]<br/>&bull;&nbsp;preoperative serum creatinine > 175 μmol/L (2.0 mg/dL)  
|-
| valign="top"|Unique factors||valign="top"|&bull;&nbsp;age >70 years<br/>&bull;&nbsp;undergoing emergent or urgent surgery||valign="top"| &bull;&nbsp;[[coronary heart disease|ischemic heart disease]]
|}


The study drug was controlled-release [[metoprolol]]:<ref name="pmid16875901"/>
The study drug was controlled-release [[metoprolol]]:<ref name="pmid16875901"/>
Line 63: Line 114:
:"The rapid intravenous infusion will consist of 5 mg of the study drug infused  over 2 minutes. Patients will receive the rapid intravenous infusion every 5  minutes, for a total of 15 mg, as long as their vital signs fulfill the standard  heart rate and SBP requirements before each dosing."
:"The rapid intravenous infusion will consist of 5 mg of the study drug infused  over 2 minutes. Patients will receive the rapid intravenous infusion every 5  minutes, for a total of 15 mg, as long as their vital signs fulfill the standard  heart rate and SBP requirements before each dosing."


The results were:<ref name="pmid18479744">{{cite journal |author= |title=Effects of extended-release metoprolol succinate in patients undergoing non-cardiac surgery (POISE trial): a randomised controlled trial |journal=Lancet |volume= |issue= |pages= |year=2008 |month=May |pmid=18479744 |doi=10.1016/S0140-6736(08)60601-7 |url=http://linkinghub.elsevier.com/retrieve/pii/S0140-6736(08)60601-7 |issn=}}</ref>
{| class="wikitable" align="right"
Metoprolol reduced risk of the primary composite endpoint of cardiovascular death, nonfatal MI, and nonfatal cardiac arrest at 30 days (hazard ratio: 0.83, P=0.04):
|+ POISE results at 30 days<ref name="pmid18479744">{{cite journal |author= |title=Effects of extended-release metoprolol succinate in patients undergoing non-cardiac surgery (POISE trial): a randomised controlled trial |journal=Lancet |volume= |issue= |pages= |year=2008 |month=May |pmid=18479744 |doi=10.1016/S0140-6736(08)60601-7 |url=http://linkinghub.elsevier.com/retrieve/pii/S0140-6736(08)60601-7 |issn=}}</ref>
* Metoprolol 5.8%
! rowspan="2"|&nbsp;!!primary composite endpoint:<br/>(CV death, nonfatal [[myocardial infarction|MI]], nonfatal cardiac arrest)!!Total mortality
* Placebo 6.9%
|-
| align="center"|hazard ratio: 0.83, P=0.04|| align="center"|hazard ratio: 1.33, P=0.03
|-
| valign="top"|Metoprolol|| valign="top" align="center"|5.8%|| valign="top" align="center"| 3.1%
|-
| valign="top"| Placebo || valign="top" align="center"|6.9%|| valign="top" align="center"| 2.3%
|}


Total mortality at 30 days was ''increased'' among patients taking metoprolol (HR: 1.33, P=0.03):
Subgroup analyses showed significant benefit from metoprolol among patients:
* Metoprolol 3.1%
* Undergoing undergoing vascular surgery
* Placebo 2.3%
* With 2 or more of 7 clinical risk factors (see table of risk factors)


These results suggest that the benefits on the primary outcome were outweighed by adverse effects; however, the POISE trial was unique in using [[metoprolol]] in an anglo population although 3-10% of anglos are poor metabolizers of drugs such as [[metopolol]] that use the CYP2D6 [[isoenzyme]].<ref name="pmid11710893">{{cite journal |author=Phillips KA, Veenstra DL, Oren E, Lee JK, Sadee W |title=Potential role of pharmacogenomics in reducing adverse drug reactions: a systematic review |journal=JAMA |volume=286 |issue=18 |pages=2270–9 |year=2001 |month=November |pmid=11710893 |doi= |url=http://jama.ama-assn.org/cgi/pmidlookup?view=long&pmid=11710893 |issn=}}</ref> This affects many [[antidepressant]]s, [[metoprolol]] and other drugs that use this [[isoenzyme]]. More information is available at Entrez Gene.<ref name="urlGene Home">{{cite web |url=http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=1565 |title=Entrez Gene: CYP2D6 cytochrome P450, family 2, subfamily D, polypeptide 6 [ Homo sapiens ] |author=Anonymous |authorlink= |coauthors= |date= |format= |work= |publisher=National Library of Medicine |pages= |language= |archiveurl= |archivedate= |quote= |accessdate=2009-01-03}}</ref>
These results suggest that the benefits on the primary outcome were outweighed by adverse effects; however, the POISE trial was unique in using [[metoprolol]] in an anglo population although 3-10% of anglos are poor metabolizers of drugs such as [[metopolol]] that use the CYP2D6 [[isoenzyme]].<ref name="pmid11710893">{{cite journal |author=Phillips KA, Veenstra DL, Oren E, Lee JK, Sadee W |title=Potential role of pharmacogenomics in reducing drug-related side effects and adverse reactionss: a systematic review |journal=JAMA |volume=286 |issue=18 |pages=2270–9 |year=2001 |month=November |pmid=11710893 |doi= |url=http://jama.ama-assn.org/cgi/pmidlookup?view=long&pmid=11710893 |issn=}}</ref> This affects many [[antidepressant]]s, [[metoprolol]] and other drugs that use this [[isoenzyme]]. More information is available at Entrez Gene.<ref name="urlGene Home">{{cite web |url=http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=1565 |title=Entrez Gene: CYP2D6 cytochrome P450, family 2, subfamily D, polypeptide 6 [ Homo sapiens ] |author=Anonymous |authorlink= |coauthors= |date= |format= |work= |publisher=National Library of Medicine |pages= |language= |archiveurl= |archivedate= |quote= |accessdate=2009-01-03}}</ref>


======MSPI trial======
======MSPI trial======
Line 84: Line 141:


======DECREASE trial======
======DECREASE trial======
The DECREASE study found benefit by starting [[bisoprolol]] 5-10 mg per day at least one week prior to vascular surgery.<ref name="pmid10588963">{{cite journal |author=Poldermans D, Boersma E, Bax JJ, ''et al'' |title=The effect of bisoprolol on perioperative mortality and myocardial infarction in high-risk patients undergoing vascular surgery. Dutch Echocardiographic Cardiac Risk Evaluation Applying Stress Echocardiography Study Group |journal=N. Engl. J. Med. |volume=341 |issue=24 |pages=1789-94 |year=1999 |pmid=10588963 |doi=}}</ref>
The DECREASE study found benefit by starting [[bisoprolol]] 5-10 mg per day at least one week prior to vascular surgery.<ref name="pmid10588963"/>
======Other large trials======
Other large [[randomized controlled trial]]s using [[bisoprolol]]<ref name="pmid17585213">{{cite journal |author=Zaugg M, Bestmann L, Wacker J, ''et al'' |title=Adrenergic receptor genotype but not perioperative bisoprolol therapy may determine cardiovascular outcome in at-risk patients undergoing surgery with spinal block: the Swiss Beta Blocker in Spinal Anesthesia (BBSA) study: a double-blinded, placebo-controlled, multicenter trial with 1-year follow-up |journal=Anesthesiology |volume=107 |issue=1 |pages=33–44 |year=2007 |month=July |pmid=17585213 |doi=10.1097/01.anes.0000267530.62344.a4 |url=http://meta.wkhealth.com/pt/pt-core/template-journal/lwwgateway/media/landingpage.htm?an=00000542-200707000-00010 |issn=}}</ref>, and [[esmolol]] as a single bolus before intubation<ref name="pmid1683818">{{cite journal |author=Miller DR, Martineau RJ, Wynands JE, Hill J |title=Bolus administration of esmolol for controlling the haemodynamic response to tracheal intubation: the Canadian Multicentre Trial |journal=Can J Anaesth |volume=38 |issue=7 |pages=849–58 |year=1991 |month=October |pmid=1683818 |doi= |url= |issn=}}</ref> have been published and were included in the [[meta-analysis]] of Banglore<ref name="pmid19012955">{{cite journal |author=Bangalore S, Wetterslev J, Pranesh S, Sawhney S, Gluud C, Messerli FH |title=Perioperative beta blockers in patients having non-cardiac surgery: a meta-analysis |journal=Lancet |volume=372 |issue=9654 |pages=1962–76 |year=2008 |month=December |pmid=19012955 |doi=10.1016/S0140-6736(08)61560-3 |url=http://linkinghub.elsevier.com/retrieve/pii/S0140-6736(08)61560-3 |issn=}}</ref>. All patients in these trials were lower risk as manifested in the low risk of complications in the placebo group. No patient died in either study.
 
======Cohort studies======
Several [[cohort study|cohort studies]] support the use of [[adrenergic beta-antagonist]]s<ref name="pmid23613075">{{cite journal| author=London MJ, Hur K, Schwartz GG, Henderson WG| title=Association of perioperative β-blockade with mortality and cardiovascular morbidity following major noncardiac surgery. | journal=JAMA | year= 2013 | volume= 309 | issue= 16 | pages= 1704-13 | pmid=23613075 | doi=10.1001/jama.2013.4135 | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=23613075  }} </ref><ref>Boersma E et al; DECREASE Study Group (Dutch Echocardiographic Cardiac Risk Evaluation Applying Stress Echocardiogrpahy). [http://jama.ama-assn.org/cgi/content/full/285/14/1865 Predictors of cardiac events after major vascular surgery: Role of clinical characteristics, dobutamine echocardiography, and beta-blocker therapy]. JAMA. 2001 Apr 11;285(14):1865-73. PMID 11308400 </ref><ref name="pmid16049209">Lindenauer PK, Pekow P, Wang K, Mamidi DK, Gutierrez B, Benjamin EM. [http://content.nejm.org/cgi/content/full/353/4/349 Perioperative beta-blocker therapy and mortality after major noncardiac surgery]. N Engl J Med. 2005 Jul 28;353(4):349-61. PMID 16049209</ref><ref>Redelmeier D et al. [http://www.bmj.com/cgi/content/full/331/7522/932 Beta blockers for elective surgery in elderly patients: population based, retrospective cohort study]. BMJ. 2005 Oct 22;331(7522):932. Epub 2005 Oct 6. PMID 16210252</ref>, at least if either heart failure or recent coronary events are present.<ref>Andersson C et al. Association of ß-Blocker Therapy With Risks of Adverse Cardiovascular Events and Deaths in Patients With Ischemic Heart Disease Undergoing Noncardiac Surgery: A Danish Nationwide Cohort Study
JAMA Intern Med. Published online November 18, 2013. doi:[http://dx.doi.org/10.1001/jamainternmed.2013.11349]</ref>
 
=====Hydroxymethylglutaryl-coenzyme A reductase inhibitors (Statins)=====
"Perioperative statin treatment in  statin-naive patients reduces atrial fibrillation, myocardial  infarction, and duration of hospital stay" according to a [[meta-analysis]]. <ref  name="pmid22351917">{{cite journal| author=Chopra V, Wesorick DH,  Sussman JB, Greene T, Rogers M, Froehlich JB et al.| title=Effect of  Perioperative Statins on Death, Myocardial Infarction, Atrial  Fibrillation, and Length of Stay: A Systematic Review and Meta-analysis.  | journal=Arch Surg | year= 2012 | volume= 147 | issue= 2 | pages=  181-9 | pmid=22351917 | doi=10.1001/archsurg.2011.897 | pmc= |  url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=22351917  }} </ref>
 
{| class="wikitable" align="right"
|+ [[Hydroxymethylglutaryl-coenzyme A reductase inhibitor]]s (Statins) before surgery<ref name="pmid19474688">{{cite journal| author=Dunkelgrun M, Boersma E, Schouten O, Koopman-van Gemert AW, van Poorten F, Bax JJ et al.| title=Bisoprolol and fluvastatin for the reduction of perioperative cardiac mortality and myocardial infarction in intermediate-risk patients undergoing noncardiovascular surgery: a randomized controlled trial (DECREASE-IV). | journal=Ann Surg | year= 2009 | volume= 249 | issue= 6 | pages= 921-6 | pmid=19474688
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=19474688 | doi=10.1097/SLA.0b013e3181a77d00
}} </ref><ref name="pmid19726772">{{cite journal| author=Schouten O, Boersma E, Hoeks SE, Benner R, van Urk H, van Sambeek MR et al.| title=Fluvastatin and perioperative events in patients undergoing vascular surgery. | journal=N Engl J Med | year= 2009 | volume= 361 | issue= 10 | pages= 980-9 | pmid=19726772
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=19726772 | doi=10.1056/NEJMoa0808207}} </ref>
!rowspan="2"|Trial!!rowspan="2"|Patients!!rowspan="2"|Intervention!!rowspan="2"|Outcome!!colspan="2"|Result
|-
!Intervention!!Control
|-
| DECREASE-IV<ref name="pmid19474688"/><br/>2009|| 1066 patients with [[Revised Cardiac Risk Index|RCRI]] ≥ 2 ||[[Fluvastatin]] starting a median of 34 days preoperatively|| total mortality within 30 days||align="center"|4.1%||align="center"|7.8%
|-
| DECREASE-III<ref name="pmid19726772"/><br/>2009|| 497 patients undergoing vascular surgery||[[Fluvastatin]] starting a median of 37 days preoperatively|| total mortality within 30 days||align="center"|2.4%||align="center"|4.9%
|-
| colspan="6"|†. P < 0.05 (neither study was significant).
|}


======Other large trials======
=====Timing surgery after recent coronary stents=====
Other large randomized controlled trials using [[metoprolol]]<ref name="pmid16793810">{{cite journal |author=Juul AB, Wetterslev J, Gluud C, ''et al'' |title=Effect of perioperative beta blockade in patients with diabetes undergoing major non-cardiac surgery: randomised placebo controlled, blinded multicentre trial |journal=BMJ |volume=332 |issue=7556 |pages=1482 |year=2006 |month=June |pmid=16793810 |pmc=1482337 |doi=10.1136/bmj.332.7556.1482 |url=http://bmj.com/cgi/pmidlookup?view=long&pmid=16793810 |issn=}}</ref><ref name="pmid17070177">{{cite journal |author=Yang H, Raymer K, Butler R, Parlow J, Roberts R |title=The effects of perioperative beta-blockade: results of the Metoprolol after Vascular Surgery (MaVS) study, a randomized controlled trial |journal=Am. Heart J. |volume=152 |issue=5 |pages=983–90 |year=2006 |month=November |pmid=17070177 |doi=10.1016/j.ahj.2006.07.024 |url=http://linkinghub.elsevier.com/retrieve/pii/S0002-8703(06)00739-3 |issn=}}</ref>, [[bisoprolol]]<ref name="pmid17585213">{{cite journal |author=Zaugg M, Bestmann L, Wacker J, ''et al'' |title=Adrenergic receptor genotype but not perioperative bisoprolol therapy may determine cardiovascular outcome in at-risk patients undergoing surgery with spinal block: the Swiss Beta Blocker in Spinal Anesthesia (BBSA) study: a double-blinded, placebo-controlled, multicenter trial with 1-year follow-up |journal=Anesthesiology |volume=107 |issue=1 |pages=33–44 |year=2007 |month=July |pmid=17585213 |doi=10.1097/01.anes.0000267530.62344.a4 |url=http://meta.wkhealth.com/pt/pt-core/template-journal/lwwgateway/media/landingpage.htm?an=00000542-200707000-00010 |issn=}}</ref>, and [[esmolol]]<ref name="pmid1683818">{{cite journal |author=Miller DR, Martineau RJ, Wynands JE, Hill J |title=Bolus administration of esmolol for controlling the haemodynamic response to tracheal intubation: the Canadian Multicentre Trial |journal=Can J Anaesth |volume=38 |issue=7 |pages=849–58 |year=1991 |month=October |pmid=1683818 |doi= |url= |issn=}}</ref> have been published and were included in the meta-analysis of Banglore<ref name="pmid19012955">{{cite journal |author=Bangalore S, Wetterslev J, Pranesh S, Sawhney S, Gluud C, Messerli FH |title=Perioperative beta blockers in patients having non-cardiac surgery: a meta-analysis |journal=Lancet |volume=372 |issue=9654 |pages=1962–76 |year=2008 |month=December |pmid=19012955 |doi=10.1016/S0140-6736(08)61560-3 |url=http://linkinghub.elsevier.com/retrieve/pii/S0140-6736(08)61560-3 |issn=}}</ref>. All patients in these trials were lower risk as manifested in the low risk of complications in the placebo group.
"Noncardiac surgery should be delayed until at least 30 days (and perhaps even 90 days) after placement of bare-metal coronary stents and 1 year after placement of drug-eluting stents."<ref name="urlNoncardiac Surgery in Patients with Recently Implanted Coronary Stents - Journal Watch (General)">{{cite web |url=http://general-medicine.jwatch.org/cgi/content/full/2008/1016/3 |title=Noncardiac Surgery in Patients with Recently Implanted Coronary Stents - Journal Watch (General) |author=Brett AS |authorlink= |coauthors= |date=2008 |format= |work= |publisher=Journal Watch (General) |pages= |language= |archiveurl= |archivedate= |quote= |accessdate=}}</ref><ref name="pmid18813036">{{cite journal |author=Nuttall GA, Brown MJ, Stombaugh JW, ''et al'' |title=Time and cardiac risk of surgery after bare-metal stent percutaneous coronary intervention |journal=Anesthesiology |volume=109 |issue=4 |pages=588–95 |year=2008 |month=October |pmid=18813036 |doi=10.1097/ALN.0b013e318186ddf8 |url=http://meta.wkhealth.com/pt/pt-core/template-journal/lwwgateway/media/landingpage.htm?an=00000542-200810000-00005 |issn=}}</ref>


=====Myocardial revascularization=====
=====Myocardial revascularization=====
A [[randomized controlled trial]] found that [[myocardial revascularization]] was associated with a statistically insignificant 2% absolute reduction in perioperative [[myocardial infarction]] among patients undergoing major vascular surgery.<ref name="pmid15625331">{{cite journal |author=McFalls EO, Ward HB, Moritz TE, ''et al'' |title=Coronary-artery revascularization before elective major vascular surgery |journal=N. Engl. J. Med. |volume=351 |issue=27 |pages=2795–804 |year=2004 |month=December |pmid=15625331 |doi=10.1056/NEJMoa041905 |url=http://content.nejm.org/cgi/pmidlookup?view=short&pmid=15625331&promo=ONFLNS19 |issn=}}</ref> The benefit, while still statistically insignificant, was greater for high risk patients.
Options for myocardial revascularization include [[coronary artery bypass]] and [[percutaneous transluminal coronary angioplasty]]. If revascularization is done, the choice of procedure is guided by whether indications exist for [[coronary artery bypass]], and the risk of bleeding with [[platelet aggregation inhibitor]]s. For patients who need [[percutaneous transluminal coronary angioplasty]] yet are at risk of bleeding with [[platelet aggregation inhibitor]]s, the American College of Cardiology (ACC) and American Heart Association (AHA) recommend:<ref name="pmid17901356"/>
* Surgery need within 14-29 days, use balloon angioplasty
* Surgery need within 30-365 days, use bare metal stents
* Surgery need within more than 365 days, use drug eluting stents
 
;Indications according to practice guidelines
[[Clinical practice guideline]]s by the American College of Cardiology (ACC) and American Heart Association (AHA) recommend:<ref name="pmid17901356"/>
* "Coronary revascularization before noncardiac surgery is useful in patients with stable angina who have significant left main [[coronary artery]] stenosis. (Level of Evidence: A)"
* "Coronary revascularization before noncardiac surgery is useful in patients with stable angina who have [[coronary artery|3-vessel disease]]. (Survival benefit is greater when left ventricular ejection fraction is less than 0.50.) (Level of Evidence: A)"
* "Coronary revascularization before noncardiac surgery is useful in patients with stable angina who have [[coronary artery|2-vessel]] disease with significant proximal [[coronary artery|left anterior descending]] stenosis and either ejection fraction less than 0.50 or demonstrable ischemia on noninvasive testing. (Level of Evidence: A)"
* "Coronary revascularization before noncardiac surgery is recommended for patients with high-risk unstable angina or non–ST-segment elevation [[myocardial infarction]] (MI). (Level of Evidence: A)" ([[myocardial infarction|NSTEMI]])
* "Coronary revascularization before noncardiac surgery is recommended in patients with acute ST-elevation [[myocardial infarction|MI]]. (Level of Evidence: A)"
* "In patients in whom coronary revascularization with percutaneous coronary intervention (PCI) is appropriate for mitigation of cardiac symptoms and who need elective noncardiac surgery in the subsequent 12 months, a strategy of balloon angioplasty or bare-metal stent placement followed by 4 to 6 weeks of dual-antiplatelet therapy is probably indicated. (Level of Evidence: B)"
* "In patients who have received drug-eluting coronary stents and who must undergo urgent surgical procedures that mandate the discontinuation of [[Platelet aggregation inhibitors|thienopyridine]] therapy, it is reasonable to continue aspirin if at all possible and restart the [[Platelet aggregation inhibitors|thienopyridine]] as soon as possible. (Level of Evidence: C)"
* "The usefulness of preoperative coronary revascularization is not well established in high-risk ischemic patients (eg, abnormal dobutamine stress echocardiogram with at least 5 segments of wall-motion abnormalities). (Level of Evidence: C)"
* "The usefulness of preoperative coronary revascularization is not well established for low-risk ischemic patients with an abnormal dobutamine stress echocardiogram (segments 1 to 4). (Level of Evidence: B)"
 
;Trials
 
{| class="wikitable" align="right"
|+ [[Myocardial revascularization]] before vascular surgery<ref name="pmid19729114">{{cite journal| author=Monaco M, Stassano P, Di Tommaso L, Pepino P, Giordano A, Pinna GB et al.| title=Systematic strategy of prophylactic coronary angiography improves long-term outcome after major vascular surgery in medium- to high-risk patients: a prospective, randomized study. | journal=J Am Coll Cardiol | year= 2009 | volume= 54 | issue= 11 | pages= 989-96 | pmid=19729114
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=19729114 | doi=10.1016/j.jacc.2009.05.041 }} <!--Formatted by http://sumsearch.uthscsa.edu/cite/--></ref><ref name="pmid15625331">{{cite journal |author=McFalls EO, Ward HB, Moritz TE, ''et al'' |title=Coronary-artery revascularization before elective major vascular surgery |journal=N. Engl. J. Med. |volume=351 |issue=27 |pages=2795–804 |year=2004 |month=December |pmid=15625331 |doi=10.1056/NEJMoa041905 |url=http://content.nejm.org/cgi/pmidlookup?view=short&pmid=15625331&promo=ONFLNS19 |issn=}}</ref><ref name="pmid17466225">{{cite journal |author=Poldermans D, Schouten O, Vidakovic R, ''et al'' |title=A clinical randomized trial to evaluate the safety of a noninvasive approach in high-risk patients undergoing major vascular surgery: the DECREASE-V Pilot Study |journal=J. Am. Coll. Cardiol. |volume=49 |issue=17 |pages=1763–9 |year=2007 |month=May |pmid=17466225 |doi=10.1016/j.jacc.2006.11.052 |url=http://linkinghub.elsevier.com/retrieve/pii/S0735-1097(07)00635-3 |issn=}}</ref>
!rowspan="2"|Trial!!rowspan="2"|Patients!!rowspan="2"|Intervention!!rowspan="2"|Outcome!!colspan="2"|Result
|-
!Intervention!!Control
|-
| Monaco et al<ref name="pmid19729114"/><br/>2009||208 patients:<br/>&bull;&nbsp;[[Revised Cardiac Risk Index|RCRI]] ≥ 2<br/>&bull;&nbsp;Aortic surgery (aortoiliac or [[abdominal aortic aneurysm|AAA]])||Routine coronary angiography || In-hospital events and events after 5 years||colspan="2"|No improvement during hospitalization, but improvement after 5 years.
|-
| DECREASE-V Pilot Study<ref name="pmid17466225"/><br/>2009|| 101 patients:<br/>&bull;&nbsp;Major vasclar surgery<br/>&bull;&nbsp;Extensive ischemia during [[stress test]]ing || &bull;&nbsp;[[Percutaneous transluminal coronary angioplasty|PTCA]]: 65% (61% used drug eluting [[stent]]<br/>&bull;&nbsp;[[Coronary artery bypass|CABG]]: 41%|| all cause death or [[myocardial infarction]] within 30 days||align="center"|35%||align="center"|33%
|-
| CARP<ref name="pmid15625331"/><br/>2004|| 510 patients<br/>&bull;&nbsp;Major vasclar surgery|| &bull;&nbsp;[[Percutaneous transluminal coronary angioplasty|PTCA]]: 59% (unknown if [[stent]]s used)<br/>&bull;&nbsp;[[Coronary artery bypass|CABG]]: 43%|| [[myocardial infarction]] within 30 days||align="center"|12%||align="center"|14%
|}
 
Two [[randomized controlled trial]]s address [[myocardial revascularization]] before noncardiac surgery.<ref name="pmid17466225">{{cite journal |author=Poldermans D, Schouten O, Vidakovic R, ''et al'' |title=A clinical randomized trial to evaluate the safety of a noninvasive approach in high-risk patients undergoing major vascular surgery: the DECREASE-V Pilot Study |journal=J. Am. Coll. Cardiol. |volume=49 |issue=17 |pages=1763–9 |year=2007 |month=May |pmid=17466225 |doi=10.1016/j.jacc.2006.11.052 |url=http://linkinghub.elsevier.com/retrieve/pii/S0735-1097(07)00635-3 |issn=}}</ref><ref name="pmid15625331">{{cite journal |author=McFalls EO, Ward HB, Moritz TE, ''et al'' |title=Coronary-artery revascularization before elective major vascular surgery |journal=N. Engl. J. Med. |volume=351 |issue=27 |pages=2795–804 |year=2004 |month=December |pmid=15625331 |doi=10.1056/NEJMoa041905 |url=http://content.nejm.org/cgi/pmidlookup?view=short&pmid=15625331&promo=ONFLNS19 |issn=}}</ref> However, both were performed prior to the ACC/AHA 2007 Guidelines and do not reflect current standards.<ref name="pmid17901356">{{cite journal |author=Fleisher LA, Beckman JA, Brown KA, ''et al'' |title=ACC/AHA 2007 Guidelines on Perioperative Cardiovascular Evaluation and Care for Noncardiac Surgery: Executive Summary: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the 2002 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery): Developed in Collaboration With the American Society of Echocardiography, American Society of Nuclear Cardiology, Heart Rhythm Society, Society of Cardiovascular Anesthesiologists, Society for Cardiovascular Angiography and Interventions, Society for Vascular Medicine and Biology, and Society for Vascular Surgery |journal=Circulation |volume=116 |issue=17 |pages=1971–1996 |year=2007 |pmid=17901356 |doi=10.1161/CIRCULATIONAHA.107.185700 |issn=}}</ref>
# The Coronary Artery Revascularization Prophylaxis (CARP) trial was associated with a statistically insignificant 2% absolute reduction in perioperative [[myocardial infarction]] among patients undergoing major vascular surgery.<ref name="pmid15625331">{{cite journal |author=McFalls EO, Ward HB, Moritz TE, ''et al'' |title=Coronary-artery revascularization before elective major vascular surgery |journal=N. Engl. J. Med. |volume=351 |issue=27 |pages=2795–804 |year=2004 |month=December |pmid=15625331 |doi=10.1056/NEJMoa041905 |url=http://content.nejm.org/cgi/pmidlookup?view=short&pmid=15625331&promo=ONFLNS19 |issn=}}</ref> The benefit, while still statistically insignificant, was greater for high risk patients as defined by at least three Eagle criteria with large defect on [[stress test]]. The CARP trial did not report what proportion of their patients receiving [[percutaneous transluminal coronary angioplasty]] received [[stent]]s. The stents that were used were probably not drug eluting as sirolimus eluting stents were first approved in the [[United States of America]] in 2003.<ref name="urlDevices@FDA">{{cite web |url=http://www.accessdata.fda.gov/scripts/cdrh/devicesatfda/index.cfm?db=PMA&id=11506 |title=Devices@FDA |author=Anonymous |authorlink= |coauthors= |date=2003 |format= |work= |publisher=Food and Drug Administration |pages= |language= |archiveurl= |archivedate= |quote= |accessdate=2009-05-02}}</ref>
# The  DECREASE-V Pilot Study reported a trend towards increased complications with [[myocardial revascularization]]; however, this trial used drug eluting stents for severe coronary disease prior to non-cardiac surgery.<ref name="pmid17466225">{{cite journal |author=Poldermans D, Schouten O, Vidakovic R, ''et al'' |title=A clinical randomized trial to evaluate the safety of a noninvasive approach in high-risk patients undergoing major vascular surgery: the DECREASE-V Pilot Study |journal=J. Am. Coll. Cardiol. |volume=49 |issue=17 |pages=1763–9 |year=2007 |month=May |pmid=17466225 |doi=10.1016/j.jacc.2006.11.052 |url=http://linkinghub.elsevier.com/retrieve/pii/S0735-1097(07)00635-3 |issn=}}</ref>
 
===Stroke risk reduction===
Ccombined carotid and cardiac operations may not reduce the risk of stroke in patients with carotid stenosis.<ref name="pmid19752298">{{cite journal| author=Li Y, Walicki D, Mathiesen C, Jenny D, Li Q, Isayev Y et al.| title=Strokes after cardiac surgery and relationship to carotid stenosis. | journal=Arch Neurol | year= 2009 | volume= 66 | issue= 9 | pages= 1091-6 | pmid=19752298
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=clinical.uthscsa.edu/cite&email=badgett@uthscdsa.edu&retmode=ref&cmd=prlinks&id=19752298 | doi=10.1001/archneurol.2009.114 }} <!--Formatted by http://sumsearch.uthscsa.edu/cite/--></ref>


===Pulmonary risk reduction===
===Pulmonary risk reduction===
[[Clinical practice guideline]]s by the [[American College of Physicians]] state:<ref name="pmid16618955">{{cite journal |author=Qaseem A, Snow V, Fitterman N, ''et al'' |title=Risk assessment for and strategies to reduce perioperative pulmonary complications for patients undergoing noncardiothoracic surgery: a guideline from the American College of Physicians |journal=Ann. Intern. Med. |volume=144 |issue=8 |pages=575–80 |year=2006 |pmid=16618955 |doi=|url=http://www.annals.org/cgi/content/full/144/8/575}}</ref>
[[Clinical prediction rule]]s are available for predicting respiratory failure ([http://www.qxmd.com/calculate-online/respirology/postoperative-respiratory-failure-risk-calculator postoperative-respiratory-failure-risk-calculator]<ref name="pmid21757571">{{cite journal| author=Gupta H, Gupta PK, Fang X, Miller WJ, Cemaj S, Forse RA et al.| title=Development and validation of a risk calculator predicting postoperative respiratory failure. | journal=Chest | year= 2011 | volume= 140 | issue= 5 | pages= 1207-15 | pmid=21757571 | doi=10.1378/chest.11-0466 | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=21757571  }} </ref>)(see [http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1421137&rendertype=table&id=t6-15 Table 6] for predictors and [http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1421137&rendertype=table&id=t7-15 Table 7] for interpretation)<ref name="pmid10903604">{{cite journal| author=Arozullah AM, Daley J, Henderson WG, Khuri SF| title=Multifactorial risk index for predicting postoperative respiratory failure in men after major noncardiac surgery. The National Veterans Administration Surgical Quality Improvement Program. | journal=Ann Surg | year= 2000 | volume= 232 | issue= 2 | pages= 242-53 | pmid=10903604
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=10903604 | pmc=PMC1421137 }}</ref> and pneumonia<ref name="pmid11712875">{{cite journal| author=Arozullah AM, Khuri SF, Henderson WG, Daley J, Participants in the National Veterans Affairs Surgical Quality Improvement Program| title=Development and validation of a multifactorial risk index for predicting postoperative pneumonia after major noncardiac surgery. | journal=Ann Intern Med | year= 2001 | volume= 135 | issue= 10 | pages= 847-57 | pmid=11712875
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=clinical.uthscsa.edu/cite&email=badgett@uthscdsa.edu&retmode=ref&cmd=prlinks&id=11712875 }}  [http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=clinical.uthscsa.edu/cite&email=badgett@uthscdsa.edu&retmode=ref&cmd=prlinks&id=12093235 Review in: ACP J Club. 2002 Jul-Aug;137(1):36]</ref> (see [http://www.annals.org/content/135/10/847/T4.expansion.html Table 4] for predictors and [http://www.annals.org/content/135/10/847/T5.expansion.html Table 5] for interpretation) after surgery. A more complicated, updated version of the respiratory failure rule is available.<ref name="pmid17544077">{{cite journal| author=Johnson RG, Arozullah AM, Neumayer L, Henderson WG, Hosokawa P, Khuri SF| title=Multivariable predictors of postoperative respiratory failure after general and vascular surgery: results from the patient safety in surgery study. | journal=J Am Coll Surg | year= 2007 | volume= 204 | issue= 6 | pages= 1188-98 | pmid=17544077
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=17544077 | doi=10.1016/j.jamcollsurg.2007.02.070 }}</ref>
 
Additional [[clinical prediction rule]]s have been developed.<ref name="pmid21045639">{{cite journal| author=Canet J, Gallart L, Gomar C, Paluzie G, Vallès J, Castillo J et al.| title=Prediction of postoperative pulmonary complications in a population-based surgical cohort. | journal=Anesthesiology | year= 2010 | volume= 113 | issue= 6 | pages= 1338-50 | pmid=21045639 | doi=10.1097/ALN.0b013e3181fc6e0a | pmc= | url= }} </ref><ref name="pmid21757571">{{cite journal| author=Gupta H, Gupta PK, Fang X, Miller WJ, Cemaj S, Forse RA et al.| title=Development and validation of a risk calculator predicting postoperative respiratory failure. | journal=Chest | year= 2011 | volume= 140 | issue= 5 | pages= 1207-15 | pmid=21757571 | doi=10.1378/chest.11-0466 | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=21757571  }} </ref>
 
[[Clinical practice guideline]]s by the [[American College of Physicians]] state:<ref name="pmid16618955">{{cite journal |author=Qaseem A, Snow V, Fitterman N, ''et al'' |title=Risk assessment for and strategies to reduce perioperative pulmonary complications for patients undergoing noncardiothoracic surgery: a guideline from the American College of Physicians |journal=Ann. Intern. Med. |volume=144 |issue=8 |pages=575–80 |year=2006 |pmid=16618955 |doi=|url=http://www.annals.org/cgi/content/full/144/8/575}}</ref><ref name="pmid16618956">{{cite journal| author=Smetana GW, Lawrence VA, Cornell JE| title=Preoperative pulmonary risk stratification for noncardiothoracic surgery: systematic review for the American College of Physicians. | journal=Ann Intern Med | year= 2006 | volume= 144 | issue= 8 | pages= 581-95 | pmid=16618956
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=16618956 }}  [http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=16944857 Review in: ACP J Club. 2006 Sep-Oct;145(2):37] <!--Formatted by http://sumsearch.uthscsa.edu/cite/--></ref>
#  "All patients undergoing noncardiothoracic surgery should be evaluated for the presence of the following significant risk factors for postoperative pulmonary complications in order to receive pre- and postoperative interventions to reduce pulmonary risk: chronic obstructive pulmonary disease, age older than 60 years, American Society of Anesthesiologists (ASA) class of II or greater, functionally dependent, and congestive heart failure."
#  "All patients undergoing noncardiothoracic surgery should be evaluated for the presence of the following significant risk factors for postoperative pulmonary complications in order to receive pre- and postoperative interventions to reduce pulmonary risk: chronic obstructive pulmonary disease, age older than 60 years, American Society of Anesthesiologists (ASA) class of II or greater, functionally dependent, and congestive heart failure."
# "Patients undergoing the following procedures are at higher risk for postoperative pulmonary complications and should be evaluated for other concomitant risk factors and receive pre- and postoperative interventions to reduce pulmonary complications: prolonged surgery (>3 hours), abdominal surgery, thoracic surgery, neurosurgery, head and neck surgery, vascular surgery, aortic aneurysm repair, emergency surgery, and general anesthesia."
# "Patients undergoing the following procedures are at higher risk for postoperative pulmonary complications and should be evaluated for other concomitant risk factors and receive pre- and postoperative interventions to reduce pulmonary complications: prolonged surgery (>3 hours), abdominal surgery, thoracic surgery, neurosurgery, head and neck surgery, vascular surgery, aortic aneurysm repair, emergency surgery, and general anesthesia."
Line 109: Line 238:
[[Incentive spirometry]] does not clearly help reduce pulmonary complications during the [[perioperative care]] after [[coronary artery bypass graft]]ing according to a [[meta-analysis]] of [[randomized controlled trial]]s by the [[Cochrane Collaboration]].
[[Incentive spirometry]] does not clearly help reduce pulmonary complications during the [[perioperative care]] after [[coronary artery bypass graft]]ing according to a [[meta-analysis]] of [[randomized controlled trial]]s by the [[Cochrane Collaboration]].
<ref name="pmid17636760">{{cite journal |author=Freitas ER, Soares BG, Cardoso JR, Atallah AN |title=Incentive spirometry for preventing pulmonary complications after coronary artery bypass graft |journal=Cochrane Database Syst Rev |volume= |issue=3 |pages=CD004466 |year=2007 |pmid=17636760 |doi=10.1002/14651858.CD004466.pub2}}</ref>
<ref name="pmid17636760">{{cite journal |author=Freitas ER, Soares BG, Cardoso JR, Atallah AN |title=Incentive spirometry for preventing pulmonary complications after coronary artery bypass graft |journal=Cochrane Database Syst Rev |volume= |issue=3 |pages=CD004466 |year=2007 |pmid=17636760 |doi=10.1002/14651858.CD004466.pub2}}</ref>
Higher mean first hour peak airway pressure may predict acute lung injury.<ref name="pmid18988659">{{cite journal| author=Fernández-Pérez ER, Sprung J, Afessa B, Warner DO, Vachon CM, Schroeder DR et al.| title=Intraoperative ventilator settings and acute lung injury after elective surgery: a nested case control study. | journal=Thorax | year= 2009 | volume= 64 | issue= 2 | pages= 121-7 | pmid=18988659 | doi=10.1136/thx.2008.102228 | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=18988659  }} </ref>


===Hepatic risk reduction===
===Hepatic risk reduction===
The [[MELD Score]] can help predict complications of surgery among patients with [[cirrhosis]].<ref name="pmid17408652">{{cite journal |author=Teh SH, Nagorney DM, Stevens SR, ''et al'' |title=Risk factors for mortality after surgery in patients with cirrhosis |journal=Gastroenterology |volume=132 |issue=4 |pages=1261–9 |year=2007 |month=April |pmid=17408652 |doi=10.1053/j.gastro.2007.01.040 |url=http://linkinghub.elsevier.com/retrieve/pii/S0016-5085(07)00179-5 |issn=}}</ref> The MELD Score may <ref name="pmid15546574">{{cite journal |author=Farnsworth N, Fagan SP, Berger DH, Awad SS |title=Child-Turcotte-Pugh versus MELD score as a predictor of outcome after elective and emergent surgery in cirrhotic patients |journal=Am. J. Surg. |volume=188 |issue=5 |pages=580–3 |year=2004 |month=November |pmid=15546574 |doi=10.1016/j.amjsurg.2004.07.034 |url=http://linkinghub.elsevier.com/retrieve/pii/S0002-9610(04)00367-8 |issn=}}</ref> or may not<ref name="pmid15290666">{{cite journal |author=Suman A, Barnes DS, Zein NN, Levinthal GN, Connor JT, Carey WD |title=Predicting outcome after cardiac surgery in patients with cirrhosis: a comparison of Child-Pugh and MELD scores |journal=Clin. Gastroenterol. Hepatol. |volume=2 |issue=8 |pages=719–23 |year=2004 |month=August |pmid=15290666 |doi= |url= |issn=}}</ref> perform better than the Child-Turcotte-Pugh class.
The [[MELD Score]] > 8  can help predict complications of surgery among patients with [[cirrhosis]].<ref name="pmid17408652">{{cite journal |author=Teh SH, Nagorney DM, Stevens SR, ''et al'' |title=Risk factors for mortality after surgery in patients with cirrhosis |journal=Gastroenterology |volume=132 |issue=4 |pages=1261–9 |year=2007 |month=April |pmid=17408652 |doi=10.1053/j.gastro.2007.01.040 |url=http://linkinghub.elsevier.com/retrieve/pii/S0016-5085(07)00179-5 |issn=}}</ref> The MELD Score may <ref name="pmid15546574">{{cite journal |author=Farnsworth N, Fagan SP, Berger DH, Awad SS |title=Child-Turcotte-Pugh versus MELD score as a predictor of outcome after elective and emergent surgery in cirrhotic patients |journal=Am. J. Surg. |volume=188 |issue=5 |pages=580–3 |year=2004 |month=November |pmid=15546574 |doi=10.1016/j.amjsurg.2004.07.034 |url=http://linkinghub.elsevier.com/retrieve/pii/S0002-9610(04)00367-8 |issn=}}</ref> or may not<ref name="pmid15290666">{{cite journal |author=Suman A, Barnes DS, Zein NN, Levinthal GN, Connor JT, Carey WD |title=Predicting outcome after cardiac surgery in patients with cirrhosis: a comparison of Child-Pugh and MELD scores |journal=Clin. Gastroenterol. Hepatol. |volume=2 |issue=8 |pages=719–23 |year=2004 |month=August |pmid=15290666 |doi= |url= |issn=}}</ref> perform better than the Child-Turcotte-Pugh class. The iMELD score may be best of all with increased mortality occurring with an iMELD  ≥ 35.<ref name="pmid19513784">{{cite journal |author=Costa BP, Sousa FC, Serôdio M, Carvalho C |title=Value of MELD and MELD-based indices in surgical risk evaluation of cirrhotic patients: retrospective analysis of 190 cases |journal=World J Surg |volume=33 |issue=8 |pages=1711–9 |year=2009 |month=August |pmid=19513784 |doi=10.1007/s00268-009-0093-4 |url=http://dx.doi.org/10.1007/s00268-009-0093-4 |issn=}}</ref>
 
===Anemia===
An abnormal [[hemoglobin]] level is associated with perioperative complications.<ref name="pmid17565082">{{cite journal |author=Wu WC, Schifftner TL, Henderson WG, ''et al'' |title=Preoperative hematocrit levels and postoperative outcomes in older patients undergoing noncardiac surgery |journal=JAMA |volume=297 |issue=22 |pages=2481–8 |year=2007 |month=June |pmid=17565082 |doi=10.1001/jama.297.22.2481 |url=http://jama.ama-assn.org/cgi/pmidlookup?view=long&pmid=17565082 |issn=}}</ref>The amount of fall in hemoglobin may be more important that the absolute level.<ref name="pmid18194382">{{cite journal |author=Karkouti K, Wijeysundera DN, Yau TM, McCluskey SA, van Rensburg A, Beattie WS |title=The influence of baseline hemoglobin concentration on tolerance of anemia in cardiac surgery |journal=Transfusion |volume=48 |issue=4 |pages=666–72 |year=2008 |month=April |pmid=18194382 |doi=10.1111/j.1537-2995.2007.01590.x |url=http://www3.interscience.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0041-1132&date=2008&volume=48&issue=4&spage=666 |issn=}}</ref>
 
Transfusion likely does not help [[anemia]] when the hemoglobin is over 8 g/dL.<ref>{{Cite journal
| doi = 10.1001/jama.2010.1446
| volume = 304
| issue = 14
| pages = 1559-1567
| last = Hajjar
| first = Ludhmila A.
| coauthors = Jean-Louis Vincent, Filomena R. B. G. Galas, Rosana E. Nakamura, Carolina M. P. Silva, Marilia H. Santos, Julia Fukushima, Roberto Kalil Filho, Denise B. Sierra, Neuza H. Lopes, Thais Mauad, Aretusa C. Roquim, Marcia R. Sundin, Wanderson C. Leao, Juliano P. Almeida, Pablo M. Pomerantzeff, Luis O. Dallan, Fabio B. Jatene, Noedir A. G. Stolf, Jose O. C. Auler
| title = Transfusion Requirements After Cardiac Surgery: The TRACS Randomized Controlled Trial
| journal = JAMA
| accessdate = 2010-10-13
| date = 2010-10-13
| url = http://jama.ama-assn.org/cgi/content/abstract/304/14/1559
}}</ref><ref name="pmid9438739">{{cite journal |author=Carson JL, Duff A, Berlin JA, ''et al'' |title=Perioperative blood transfusion and postoperative mortality |journal=JAMA |volume=279 |issue=3 |pages=199–205 |year=1998 |month=January |pmid=9438739 |doi= |url=http://jama.ama-assn.org/cgi/pmidlookup?view=long&pmid=9438739 |issn=}}</ref><ref name="pmid10532600">{{cite journal |author=Bracey AW, Radovancevic R, Riggs SA, ''et al'' |title=Lowering the hemoglobin threshold for transfusion in coronary artery bypass procedures: effect on patient outcome |journal=Transfusion |volume=39 |issue=10 |pages=1070–7 |year=1999 |month=October |pmid=10532600 |doi= |url=http://www3.interscience.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0041-1132&date=1999&volume=39&issue=10&spage=1070 |issn=}}</ref>
 
===Bleeding===
The [[prothrombin time]] (PT) and [[partial thromboplastin time]] (PTT) do not well predict bleeding complications as an abnormal value may be due to the [[antiphospholipid syndrome]].<ref name="pmid12575882">{{cite journal| author=Smetana GW, Macpherson DS| title=The case against routine preoperative laboratory testing. | journal=Med Clin North Am | year= 2003 | volume= 87 | issue= 1 | pages= 7-40 | pmid=12575882
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=clinical.uthscsa.edu/cite&email=badgett@uthscdsa.edu&retmode=ref&cmd=prlinks&id=12575882 }} <!--Formatted by http://sumsearch.uthscsa.edu/cite/--></ref><ref name="pmid3723774">{{cite journal| author=Suchman AL, Mushlin AI| title=How well does the activated partial thromboplastin time predict postoperative hemorrhage? | journal=JAMA | year= 1986 | volume= 256 | issue= 6 | pages= 750-3 | pmid=3723774
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=clinical.uthscsa.edu/cite&email=badgett@uthscdsa.edu&retmode=ref&cmd=prlinks&id=3723774 }} <!--Formatted by http://sumsearch.uthscsa.edu/cite/--></ref>
 
===Chronic anticoagulation===
Details have been provided by the [[American College of Chest Physicians]] at [http://chestjournal.chestpubs.org/content/133/6_suppl/299S.full The Perioperative Management of Antithrombotic Therapy].
 
This topic has been reviewed.<ref name="pmid9154771">{{cite journal |author=Kearon C, Hirsh J |title=Management of anticoagulation before and after elective surgery |journal=N. Engl. J. Med. |volume=336 |issue=21 |pages=1506–11 |year=1997 |month=May |pmid=9154771 |doi= |url=http://content.nejm.org/cgi/pmidlookup?view=short&pmid=9154771&promo=ONFLNS19 |issn=}}</ref>
 
A [[systematic review]] found [[anticoagulation]] with [[warfarin]] does not need interruption during minor procedures.<ref name="pmid12719198">{{cite journal |author=Dunn AS, Turpie AG |title=Perioperative management of patients receiving oral anticoagulants: a systematic review |journal=Arch. Intern. Med. |volume=163 |issue=8 |pages=901–8 |year=2003 |month=April |pmid=12719198 |doi=10.1001/archinte.163.8.901 |url=http://archinte.ama-assn.org/cgi/pmidlookup?view=long&pmid=12719198 |issn=}}</ref>
 
For procedures that need discontinuation of [[anticoagulation]], a cohort study that found that interruption for 5 days or less was generally safe.<ref name="pmid18195197">{{cite journal |author=Garcia DA, Regan S, Henault LE, ''et al'' |title=Risk of thromboembolism with short-term interruption of warfarin therapy |journal=Arch. Intern. Med. |volume=168 |issue=1 |pages=63–9 |year=2008 |month=January |pmid=18195197 |doi=10.1001/archinternmed.2007.23 |url=http://archinte.ama-assn.org/cgi/pmidlookup?view=long&pmid=18195197 |issn=}}</ref>
 
Among patients taking [[anticoagulant]]s, [[dabigatran]] and [[warfarin]] were associated with similar rates of bleeding; however abigatran allowed a shorter interruption of oral anticoagulation.<ref name="pmid22700854">{{cite journal| author=Healey JS, Eikelboom J, Douketis J, Wallentin L, Oldgren J, Yang S et al.| title=Periprocedural Bleeding and Thromboembolic Events With Dabigatran Compared With Warfarin: Results From the Randomized Evaluation of Long-Term Anticoagulation Therapy (RE-LY) Randomized Trial. | journal=Circulation | year= 2012 | volume= 126 | issue= 3 | pages= 343-348 | pmid=22700854 | doi=10.1161/CIRCULATIONAHA.111.090464 | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=22700854  }} </ref>
 
For patients needing a bridge, low molecular weight heparin is preferable to [[intravenous infusion]] of unfractionated heparin.<ref  name="pmid18574269">{{cite journal|  author=Douketis JD, Berger PB, Dunn AS, Jaffer AK, Spyropoulos AC,  Becker RC et al.| title=The perioperative management of antithrombotic  therapy: American College of Chest Physicians Evidence-Based Clinical  Practice Guidelines (8th Edition). | journal=Chest | year= 2008 |  volume= 133 | issue= 6 Suppl | pages= 299S-339S | pmid=18574269
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=clinical.uthscsa.edu/cite&email=badgett@uthscdsa.edu&retmode=ref&cmd=prlinks&id=18574269  | doi=10.1378/chest.08-0675 }}  <!--Formatted by http://sumsearch.uthscsa.edu/cite/--></ref> For patients needing a low molecular weight heparin bridge, a [http://archinte.ama-assn.org/cgi/content/full/164/12/1319/TABLEIOI30313T1 protocol] is available.<ref name="pmid15226166">{{cite journal |author=Douketis JD, Johnson JA, Turpie AG |title=Low-molecular-weight heparin as bridging anticoagulation during interruption of warfarin: assessment of a standardized periprocedural anticoagulation regimen |journal=Arch. Intern. Med. |volume=164 |issue=12 |pages=1319–26 |year=2004 |month=June |pmid=15226166 |doi=10.1001/archinte.164.12.1319 |url=http://archinte.ama-assn.org/cgi/pmidlookup?view=long&pmid=15226166 |issn=}}</ref> However, bridging with low molecular weight heparin increases bleeding as  compared to no bridging.<ref name="pmid19719825">{{cite journal| author=Witt DM, Delate T,  McCool KH, Dowd MB, Clark NP, Crowther MA et al.| title=Incidence and  predictors of bleeding or thrombosis after polypectomy in patients  receiving and not receiving anticoagulation therapy. | journal=J Thromb  Haemost | year= 2009 | volume= 7 | issue= 12 | pages= 1982-9 |  pmid=19719825
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=clinical.uthscsa.edu/cite&email=badgett@uthscdsa.edu&retmode=ref&cmd=prlinks&id=19719825  | doi=10.1111/j.1538-7836.2009.03598.x }}  <!--Formatted by http://sumsearch.uthscsa.edu/cite/--></ref>
 
===Delirium===
{{main|Delirium}}


===Deep venous thrombosis prevention===
:See [[Deep venous thrombosis#Surgery_Patients]] and [http://chestjournal.chestpubs.org/content/133/6_suppl/381S.long American College of Chest Physicians] clinical practice guidelines


===Management of chronic anticoagulation===
===Infection===
A [[systematic review]] found [[warfarin]] does not need interruption during minor procedures.<ref name="pmid12719198">{{cite journal |author=Dunn AS, Turpie AG |title=Perioperative management of patients receiving oral anticoagulants: a systematic review |journal=Arch. Intern. Med. |volume=163 |issue=8 |pages=901–8 |year=2003 |month=April |pmid=12719198 |doi=10.1001/archinte.163.8.901 |url=http://archinte.ama-assn.org/cgi/pmidlookup?view=long&pmid=12719198 |issn=}}</ref> This was confirmed in a cohort study that found that interruption for 5 days or less was generally safe.<ref name="pmid18195197">{{cite journal |author=Garcia DA, Regan S, Henault LE, ''et al'' |title=Risk of thromboembolism with short-term interruption of warfarin therapy |journal=Arch. Intern. Med. |volume=168 |issue=1 |pages=63–9 |year=2008 |month=January |pmid=18195197 |doi=10.1001/archinternmed.2007.23 |url=http://archinte.ama-assn.org/cgi/pmidlookup?view=long&pmid=18195197 |issn=}}</ref>
The benefit in seeking for and treating asymptomatic bacteruria prior to arthroplasty is not proven.<ref name="pmid24723280">{{cite journal| author=Sousa R, Muñoz-Mahamud E, Quayle J, Dias da Costa L, Casals C, Scott P et al.| title=Is Asymptomatic Bacteriuria a Risk Factor for Prosthetic Joint Infection? | journal=Clin Infect Dis | year= 2014 | volume= | issue= | pages= | pmid=24723280 | doi=10.1093/cid/ciu235 | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=24723280  }} </ref><ref name="pmid23430723">{{cite journal| author=Cordero-Ampuero J, González-Fernández E, Martínez-Vélez D, Esteban J| title=Are antibiotics necessary in hip arthroplasty with asymptomatic bacteriuria? Seeding risk with/without treatment. | journal=Clin Orthop Relat Res | year= 2013 | volume= 471 | issue= 12 | pages= 3822-9 | pmid=23430723 | doi=10.1007/s11999-013-2868-z | pmc=PMC3825921 | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=23430723  }} </ref>


For patients needing a low molecular weight heparin bridge, a [http://archinte.ama-assn.org/cgi/content/full/164/12/1319/TABLEIOI30313T1 protocol] is available.<ref name="pmid15226166">{{cite journal |author=Douketis JD, Johnson JA, Turpie AG |title=Low-molecular-weight heparin as bridging anticoagulation during interruption of warfarin: assessment of a standardized periprocedural anticoagulation regimen |journal=Arch. Intern. Med. |volume=164 |issue=12 |pages=1319–26 |year=2004 |month=June |pmid=15226166 |doi=10.1001/archinte.164.12.1319 |url=http://archinte.ama-assn.org/cgi/pmidlookup?view=long&pmid=15226166 |issn=}}</ref>
===Obesity===
The management of obese patients has been reviewed.<ref name="pmid19528335">{{cite journal |author=Poirier P, Alpert MA, Fleisher LA, ''et al.'' |title=Cardiovascular Evaluation and Management of Severely Obese Patients Undergoing Surgery. A Science Advisory From the American Heart Association |journal=Circulation |volume= |issue= |pages= |year=2009 |month=June |pmid=19528335 |doi=10.1161/CIRCULATIONAHA.109.192575 |url=http://circ.ahajournals.org/cgi/pmidlookup?view=long&pmid=19528335 |issn=}}</ref>


==Benefits of preoperative medical consultation==
==Benefits of preoperative medical consultation==
Line 127: Line 302:


Drawing from aviation methods of risk reduction, there are specific points, such as the induction of anesthesia or the entry into a body cavity, when the team stops and goes through a specific checklist of physiological parameters, equipment readiness, etc. In the discipline of [[crew resource management]], one team member is specifically tasked to ask each structured question, and another member to check the matter and give the answer.
Drawing from aviation methods of risk reduction, there are specific points, such as the induction of anesthesia or the entry into a body cavity, when the team stops and goes through a specific checklist of physiological parameters, equipment readiness, etc. In the discipline of [[crew resource management]], one team member is specifically tasked to ask each structured question, and another member to check the matter and give the answer.
==References==
<references/>


==See also==
==See also==
* [[Perioperative care]]
* [[Perioperative care]]
* [[Revised Cardiac Risk Index]]
* [[Revised Cardiac Risk Index]]
==References==
{{reflist|2}}[[Category:Suggestion Bot Tag]]

Latest revision as of 16:00, 6 October 2024

This article is developing and not approved.
Main Article
Discussion
Related Articles  [?]
Bibliography  [?]
External Links  [?]
Citable Version  [?]
Catalogs [?]
 
This editable Main Article is under development and subject to a disclaimer.
See also perioperative care

Preoperative care is defined as "Care given during the period prior to undergoing surgery when psychological and physical preparations are made according to the special needs of the individual patient. This period spans the time between admission to the hospital to the time the surgery begins."[1][2]

Components of preoperative care

Clinical prediction rules are available for predicting all cause mortality.[3][4]

Cardiac risk reduction

Clinical practice guidelines

Clinical practice guidelines are available that have been updated in 2014[5], 2009[6][7], 2007[8], and 2002[9]. Guidelines by the American College of Cardiology (ACC) and American Heart Association (AHA) recommend (as summarized by Journal Watch:[10][11]

  • 'Noninvasive stress testing of patients with 3 or more clinical risk factors and poor functional capacity (less than 4 metabolic equivalents METs) who require vascular surgery is reasonable if it will change management"[8]
  • "Patients scheduled for low-risk noncardiac surgery should proceed to surgery."[10]
  • "Patients with good functional capacity should proceed to surgery."[10]
  • "Patients with poor or unknown functional capacity who are scheduled for non-low-risk surgery should be stratified according to the Revised Cardiac Risk Index[10] (Journal Watch Sep 17 1999). Patients with no risk factors should proceed to surgery. For those with one or more risk factors, clinicians are given the option of proceeding with surgery or performing noninvasive stress testing; the decision should be influenced by the type of noncardiac surgery (vascular vs. other), and by whether the clinician believes that noninvasive testing "will change management."
  • "For patients with risk factors, clinicians should consider perioperative ß-blockade."[10]
  • "The algorithm does not apply to patients who require emergency noncardiac surgery, or to patients with active cardiac problems." Active cardiac conditions are:[12]

Cardiac risk assessment

Self reported poor functional capacity, defined as inability to walk 4 blocks and climb 2 flights of stairs, increases the risk of cardiac complications in non-cardiac surgery from 5.2% to 9.6%.[13] The accuracy of this question is:

The accuracy of self reported poor functional capacity
  Sensitivity Specificity
Any serious complication 71% 47%
Serious cardiac complication 70% 45%
Revised Cardiac Risk Index
For more information, see: Revised Cardiac Risk Index.

The Revised Cardiac Risk Index (RCRI) can help estimate probability of cardiac complications.[14]

Eagle criteria

The Eagle criteria (Q waves, history of ventricular ectopic activity, diabetes, advanced age, angina) can help assess risk in combination with stress testing.[15] Eagle et al propose that stress testing is most appropriate for patients with one or two of the five criteria. Myocardial revascularization before vascular surgery may help patients with at least 3 Eagle criteria.[16]

Echocardiography

Routine echocardiography for non-cardiac surgery may not be helpful.[17]

Stress testing

Dobutamine echocardiography stress testing may be the most sensitive non-invasive test.[18] Dobutamine echocardiography has been used to indicate patients who might benefit from perioperative beta-blockers.[19][20]

Cardiac risk by type of surgery
Cardiac risk stratification for noncardiac surgeries. See also Figure 1 of Lee et al.[21]
2007 ACC/AHA Guidelines
(from their Table 4[8])
2002 ACC/AHA Guidelines
(from their Table 3[22])
Boersma 2005[23] RCRI (1999)[21]
Vascular (reported cardiac risk often more than 5%):
• Aortic and other major vascular surgery
• Peripheral vascular surgery
High (Reported cardiac risk often greater than 5%):
• Emergent major operations, particularly in the elderly
• Aortic and other major vascular surgery
• Peripheral vascular surgery
• Anticipated prolonged surgical procedures associated with large fluid shifts and/or blood loss
High:
• Aortic
High:
• Intraperitoneal
• Intrathoracic
• Vascular surgery above the inguinal ligaments (excluding carotids and arms)
Intermediate (reported cardiac risk generally 1% to 5%):
• Intraperitoneal and intrathoracic surgery
• Carotid endarterectomy
• Head and neck surgery
• Orthopedic surgery
• Prostate surgery
Intermediate (Reported cardiac risk generally less than 5%):
• Carotid endarterectomy
• Head and neck surgery
• Intraperitoneal and intrathoracic surgery
• Orthopedic surgery
• Prostate surgery
Intermediate-high risk:
• abdominal
• ear, nose, throat
• neurologic
• pulmonary
• renal transplant
• vascular (excluding aortic and carotid)
Low-intermediate risk:
• orthopedic
• urologic
 
Low (reported cardiac risk generally less than 1%):
• Endoscopic procedures
• Superficial procedure
• Cataract surgery
• Breast surgery
• Ambulatory surgery
Low (Reported cardiac risk generally less than 1%):
• Endoscopic procedures
• Superficial procedure
• Cataract surgery
• Breast surgery
Low:
• breast
• carotid
• dental
• endocrine
• eye
• gynecology
• reconstructive
Brain natriuretic peptide

The brain natriuretic peptide (BNP) when elevated about levels ranging from 40 to 533, may help predict complications.[24]

Interventions

Perioperative ß-blockade
See Evidence table

An update in 2009 of the 2007 ACC/AHA clinical practice guideline, also summarized in their Figure 1, recommends:[25]

  1. "Beta blockers should be continued in patients undergoing surgery who are receiving beta blockers for treatment of conditions with ACCF/AHA Class I guideline indications for the drugs."
  2. "Beta blockers titrated to heart rate and blood pressure are probably recommended for patients undergoing vascular surgery who are at high cardiac risk owing to coronary artery disease or the finding of cardiac ischemia on preoperative testing"
  3. Beta blockers titrated to heart rate and blood pressure are reasonable for patients in whom preoperative assessment for vascular surgery identifies high cardiac risk, as defined by the presence of more than 1 clinical risk factor."
  • "Beta blockers titrated to heart rate and blood pressure are reasonable for patients in whom preoperative assessment identifies coronary artery disease or high cardiac risk, as defined by the presence of more than 1 clinical risk factor,* who are undergoing intermediate-risk surgery"

A meta-analysis of randomized controlled trials found that beta-blockers may cause a decrease in myocardial ischemia (number needed to treat = 16) with a lesser increase in non-fatal strokes (number needed to harm [NNH] = 293).[26] This meta-analysis found significant benefit on overall mortality for patients at high surgical risk (see yellow box for definition of risk categories) but there was no relationship to medical risk categories. The meta-analysis did not regress outcome by mortality in the control groups.

Subsequent studies concluded that adrenergic beta-antagonists if used chronically[27] or started with adequate time before surgery[28][29] and that chronic adrenergic beta-antagonists may be better than episodic adrenergic beta-antagonists[27].

Atenolol may be more effective than metoprolol according to non-randomized studies[30][31] and a meta-analysis of randomized controlled trials[29].

POISE trial

The largest trial in the meta-analysis was the POISE trial.[32][33] Most participants underwent vascular (42%), intraabdominal (23%), or orthopedic (19%) surgery."

Comparison of POISE risk factors and Revised Cardiac Risk Index
  POISE Revised Cardiac Risk Index
Risk factors in common • undergoing intrathoracic or intraperitoneal surgery
• heart failure
• transient ischaemic attack
• diabetes mellitus
• serum creatinine > 175 μmol/L (2.0 mg/dL)
• high-risk surgery (intraperitoneal, intrathoracic, or vascular surgery above the inguinal ligaments)
• heart failure
• cerebrovascular disease
• preoperative treatment with insulin
• preoperative serum creatinine > 175 μmol/L (2.0 mg/dL)
Unique factors • age >70 years
• undergoing emergent or urgent surgery
• ischemic heart disease

The study drug was controlled-release metoprolol:[32]

"Administration of the study drug at each dosing time, except during the first 6 hours after surgery, requires a patient to have a heart rate ≥50 beats/min and a systolic blood pressure (SBP) ≥100 mm Hg."
"Two to 4 hours before surgery, patients will take 100 mg (ie, half a tablet) of the study drug orally. If the patient heart rate is >80 beats/min and their SBP is ≥100 mm Hg during the first 6 hours after surgery, they will take 100 mg of the study drug orally. Patients who do not receive a dose of the study drug during the first 6 hours after surgery will take 100 mg of the study drug orally at 6 hours after surgery. Starting 12 hours after patients receive their first postoperative study drug dose and daily thereafter for 30 days, they will take 200 mg of the study drug orally. If the patients' heart rate is consistently <45 beats/min or their SBP is <100 mm Hg, caregivers will hold the study drug until the patients' heart rate or SBP recovers and will then administer 100 mg of the study drug orally. If the patients' heart rate is consistently between 45 and 49 beats/min and their SBP is >100 mm Hg, they will delay taking the study drug for 12 hours."
"Patients who are unable to take medications orally will receive the study drug by slow or rapid intravenous infusion every 6 hours until they are able to receive the study drug orally. The slow intravenous infusion consists of 15 mg of the study drug in 25 mL of normal saline infused over a 60-minute period, and patients will have their heart rate and blood pressure checked 10, 30, and 60 minutes after starting the infusion. If the patients' heart rate is <50 beats/min or their SBP is <100 mm Hg, the infusion is stopped and subsequent infusions will consist of 10 mg of the study drug in 25 mL of normal saline infused over a 60-minute period."
"The rapid intravenous infusion will consist of 5 mg of the study drug infused over 2 minutes. Patients will receive the rapid intravenous infusion every 5 minutes, for a total of 15 mg, as long as their vital signs fulfill the standard heart rate and SBP requirements before each dosing."
POISE results at 30 days[33]
  primary composite endpoint:
(CV death, nonfatal MI, nonfatal cardiac arrest)
Total mortality
hazard ratio: 0.83, P=0.04 hazard ratio: 1.33, P=0.03
Metoprolol 5.8% 3.1%
Placebo 6.9% 2.3%

Subgroup analyses showed significant benefit from metoprolol among patients:

  • Undergoing undergoing vascular surgery
  • With 2 or more of 7 clinical risk factors (see table of risk factors)

These results suggest that the benefits on the primary outcome were outweighed by adverse effects; however, the POISE trial was unique in using metoprolol in an anglo population although 3-10% of anglos are poor metabolizers of drugs such as metopolol that use the CYP2D6 isoenzyme.[34] This affects many antidepressants, metoprolol and other drugs that use this isoenzyme. More information is available at Entrez Gene.[35]

MSPI trial

In the The Multicenter Study of Perioperative Ischemia Research Group (MSPI)[36][37], the patients were similar to the POISE study in that about 40% had vascular surgery. The intervention was 50-100 mg of atenolol per day starting on the first postoperative day and continuing for up to 7 days. However, at 6 months there was a trend for more atenolol patients to still be taking beta-blockers (13.8% versus 8.8%).

In the MSPI, atenolol reduced perioperative ischemia.[37]

Regarding mortality, the MSPI study focused its results on mortality at 6 months to two years. In order to compare to the POISE trial, the hospital death rate in the MSPI study was:[36]

  • Atenolol 4% (4/99)
  • Placebo 2% (2/101)
DECREASE trial

The DECREASE study found benefit by starting bisoprolol 5-10 mg per day at least one week prior to vascular surgery.[19]

Other large trials

Other large randomized controlled trials using bisoprolol[38], and esmolol as a single bolus before intubation[39] have been published and were included in the meta-analysis of Banglore[26]. All patients in these trials were lower risk as manifested in the low risk of complications in the placebo group. No patient died in either study.

Cohort studies

Several cohort studies support the use of adrenergic beta-antagonists[40][41][42][43], at least if either heart failure or recent coronary events are present.[44]

Hydroxymethylglutaryl-coenzyme A reductase inhibitors (Statins)

"Perioperative statin treatment in statin-naive patients reduces atrial fibrillation, myocardial infarction, and duration of hospital stay" according to a meta-analysis. [45]

Hydroxymethylglutaryl-coenzyme A reductase inhibitors (Statins) before surgery[46][47]
Trial Patients Intervention Outcome Result
Intervention Control
DECREASE-IV[46]
2009
1066 patients with RCRI ≥ 2 Fluvastatin starting a median of 34 days preoperatively total mortality within 30 days 4.1% 7.8%
DECREASE-III[47]
2009
497 patients undergoing vascular surgery Fluvastatin starting a median of 37 days preoperatively total mortality within 30 days 2.4% 4.9%
†. P < 0.05 (neither study was significant).
Timing surgery after recent coronary stents

"Noncardiac surgery should be delayed until at least 30 days (and perhaps even 90 days) after placement of bare-metal coronary stents and 1 year after placement of drug-eluting stents."[48][49]

Myocardial revascularization

Options for myocardial revascularization include coronary artery bypass and percutaneous transluminal coronary angioplasty. If revascularization is done, the choice of procedure is guided by whether indications exist for coronary artery bypass, and the risk of bleeding with platelet aggregation inhibitors. For patients who need percutaneous transluminal coronary angioplasty yet are at risk of bleeding with platelet aggregation inhibitors, the American College of Cardiology (ACC) and American Heart Association (AHA) recommend:[8]

  • Surgery need within 14-29 days, use balloon angioplasty
  • Surgery need within 30-365 days, use bare metal stents
  • Surgery need within more than 365 days, use drug eluting stents
Indications according to practice guidelines

Clinical practice guidelines by the American College of Cardiology (ACC) and American Heart Association (AHA) recommend:[8]

  • "Coronary revascularization before noncardiac surgery is useful in patients with stable angina who have significant left main coronary artery stenosis. (Level of Evidence: A)"
  • "Coronary revascularization before noncardiac surgery is useful in patients with stable angina who have 3-vessel disease. (Survival benefit is greater when left ventricular ejection fraction is less than 0.50.) (Level of Evidence: A)"
  • "Coronary revascularization before noncardiac surgery is useful in patients with stable angina who have 2-vessel disease with significant proximal left anterior descending stenosis and either ejection fraction less than 0.50 or demonstrable ischemia on noninvasive testing. (Level of Evidence: A)"
  • "Coronary revascularization before noncardiac surgery is recommended for patients with high-risk unstable angina or non–ST-segment elevation myocardial infarction (MI). (Level of Evidence: A)" (NSTEMI)
  • "Coronary revascularization before noncardiac surgery is recommended in patients with acute ST-elevation MI. (Level of Evidence: A)"
  • "In patients in whom coronary revascularization with percutaneous coronary intervention (PCI) is appropriate for mitigation of cardiac symptoms and who need elective noncardiac surgery in the subsequent 12 months, a strategy of balloon angioplasty or bare-metal stent placement followed by 4 to 6 weeks of dual-antiplatelet therapy is probably indicated. (Level of Evidence: B)"
  • "In patients who have received drug-eluting coronary stents and who must undergo urgent surgical procedures that mandate the discontinuation of thienopyridine therapy, it is reasonable to continue aspirin if at all possible and restart the thienopyridine as soon as possible. (Level of Evidence: C)"
  • "The usefulness of preoperative coronary revascularization is not well established in high-risk ischemic patients (eg, abnormal dobutamine stress echocardiogram with at least 5 segments of wall-motion abnormalities). (Level of Evidence: C)"
  • "The usefulness of preoperative coronary revascularization is not well established for low-risk ischemic patients with an abnormal dobutamine stress echocardiogram (segments 1 to 4). (Level of Evidence: B)"
Trials
Myocardial revascularization before vascular surgery[50][16][51]
Trial Patients Intervention Outcome Result
Intervention Control
Monaco et al[50]
2009
208 patients:
• RCRI ≥ 2
• Aortic surgery (aortoiliac or AAA)
Routine coronary angiography In-hospital events and events after 5 years No improvement during hospitalization, but improvement after 5 years.
DECREASE-V Pilot Study[51]
2009
101 patients:
• Major vasclar surgery
• Extensive ischemia during stress testing
• PTCA: 65% (61% used drug eluting stent
• CABG: 41%
all cause death or myocardial infarction within 30 days 35% 33%
CARP[16]
2004
510 patients
• Major vasclar surgery
• PTCA: 59% (unknown if stents used)
• CABG: 43%
myocardial infarction within 30 days 12% 14%

Two randomized controlled trials address myocardial revascularization before noncardiac surgery.[51][16] However, both were performed prior to the ACC/AHA 2007 Guidelines and do not reflect current standards.[8]

  1. The Coronary Artery Revascularization Prophylaxis (CARP) trial was associated with a statistically insignificant 2% absolute reduction in perioperative myocardial infarction among patients undergoing major vascular surgery.[16] The benefit, while still statistically insignificant, was greater for high risk patients as defined by at least three Eagle criteria with large defect on stress test. The CARP trial did not report what proportion of their patients receiving percutaneous transluminal coronary angioplasty received stents. The stents that were used were probably not drug eluting as sirolimus eluting stents were first approved in the United States of America in 2003.[52]
  2. The DECREASE-V Pilot Study reported a trend towards increased complications with myocardial revascularization; however, this trial used drug eluting stents for severe coronary disease prior to non-cardiac surgery.[51]

Stroke risk reduction

Ccombined carotid and cardiac operations may not reduce the risk of stroke in patients with carotid stenosis.[53]

Pulmonary risk reduction

Clinical prediction rules are available for predicting respiratory failure (postoperative-respiratory-failure-risk-calculator[54])(see Table 6 for predictors and Table 7 for interpretation)[55] and pneumonia[56] (see Table 4 for predictors and Table 5 for interpretation) after surgery. A more complicated, updated version of the respiratory failure rule is available.[57]

Additional clinical prediction rules have been developed.[58][54]

Clinical practice guidelines by the American College of Physicians state:[59][60]

  1. "All patients undergoing noncardiothoracic surgery should be evaluated for the presence of the following significant risk factors for postoperative pulmonary complications in order to receive pre- and postoperative interventions to reduce pulmonary risk: chronic obstructive pulmonary disease, age older than 60 years, American Society of Anesthesiologists (ASA) class of II or greater, functionally dependent, and congestive heart failure."
  2. "Patients undergoing the following procedures are at higher risk for postoperative pulmonary complications and should be evaluated for other concomitant risk factors and receive pre- and postoperative interventions to reduce pulmonary complications: prolonged surgery (>3 hours), abdominal surgery, thoracic surgery, neurosurgery, head and neck surgery, vascular surgery, aortic aneurysm repair, emergency surgery, and general anesthesia."
  3. "A low serum albumin level (<35 g/L) is a powerful marker of increased risk for postoperative pulmonary complications and should be measured in all patients who are clinically suspected of having hypoalbuminemia; measurement should be considered in patients with 1 or more risk factors for perioperative pulmonary complications."
  4. "All patients who after preoperative evaluation are found to be at higher risk for postoperative pulmonary complications should receive the following postoperative procedures in order to reduce postoperative pulmonary complications: 1) deep breathing exercises or incentive spirometry and 2) selective use of a nasogastric tube (as needed for postoperative nausea or vomiting, inability to tolerate oral intake, or symptomatic abdominal distention)."
  5. "Preoperative spirometry and chest radiography should not be used routinely for predicting risk for postoperative pulmonary complications."
  6. "The following procedures should not be used solely for reducing postoperative pulmonary complication risk: 1) right-heart catheterization and 2) total parenteral nutrition or total enteral nutrition (for patients who are malnourished or have low serum albumin levels)."

For patients with asthma, more aggressive clinical practice guidelines by the U.S. National Asthma Education and Prevention Program recommend:[61]

  • "Patients who have asthma should have an evaluation before surgery that includes a review of symptoms, medication use (particularly the use of oral systemic corticosteroids for longer than 2 weeks in the past 6 months), and measurement of pulmonary function".
  • "If possible, attempts should be made to improve lung function preoperatively (FEV1 or peak expiratory flow rate [PEFR]) to either their predicted values or their personal best level. A short course of oral systemic corticosteroids may be necessary to optimize lung function".

Smoking cessation may reduce pulmonary complications according to the results of a randomized controlled trial.[62]

Incentive spirometry does not clearly help reduce pulmonary complications during the perioperative care after coronary artery bypass grafting according to a meta-analysis of randomized controlled trials by the Cochrane Collaboration. [63]

Higher mean first hour peak airway pressure may predict acute lung injury.[64]

Hepatic risk reduction

The MELD Score > 8 can help predict complications of surgery among patients with cirrhosis.[65] The MELD Score may [66] or may not[67] perform better than the Child-Turcotte-Pugh class. The iMELD score may be best of all with increased mortality occurring with an iMELD ≥ 35.[68]

Anemia

An abnormal hemoglobin level is associated with perioperative complications.[69]The amount of fall in hemoglobin may be more important that the absolute level.[70]

Transfusion likely does not help anemia when the hemoglobin is over 8 g/dL.[71][72][73]

Bleeding

The prothrombin time (PT) and partial thromboplastin time (PTT) do not well predict bleeding complications as an abnormal value may be due to the antiphospholipid syndrome.[74][75]

Chronic anticoagulation

Details have been provided by the American College of Chest Physicians at The Perioperative Management of Antithrombotic Therapy.

This topic has been reviewed.[76]

A systematic review found anticoagulation with warfarin does not need interruption during minor procedures.[77]

For procedures that need discontinuation of anticoagulation, a cohort study that found that interruption for 5 days or less was generally safe.[78]

Among patients taking anticoagulants, dabigatran and warfarin were associated with similar rates of bleeding; however abigatran allowed a shorter interruption of oral anticoagulation.[79]

For patients needing a bridge, low molecular weight heparin is preferable to intravenous infusion of unfractionated heparin.[80] For patients needing a low molecular weight heparin bridge, a protocol is available.[81] However, bridging with low molecular weight heparin increases bleeding as compared to no bridging.[82]

Delirium

For more information, see: Delirium.


Deep venous thrombosis prevention

See Deep venous thrombosis#Surgery_Patients and American College of Chest Physicians clinical practice guidelines

Infection

The benefit in seeking for and treating asymptomatic bacteruria prior to arthroplasty is not proven.[83][84]

Obesity

The management of obese patients has been reviewed.[85]

Benefits of preoperative medical consultation

The benefits of internal medicine consultation are not clear in an observational study[86]; whereas a pseudorandomized trial found benefit from a hospitalist consultation[87] and a non-randomized trial using historical controls found benefit from geriatrics consultation[88].

Unnecessary delays in surgery is associated with increased operative risk.[89]

Preoperative methods for surgical risk reduction

A wide range of methods for avoiding surgical errors, either in the operating room or shortly before surgery, are increasingly in use. One method, long used by the choice of individual surgeons, is becoming more of a standard: when, for example, a procedure could be prepared on either the left or right extremity, the surgeon, or even the patient, may write, with an indelible pen, "cut here" on the appropriate site and "do not cut here" on the contralateral extremity, signing both.

Drawing from aviation methods of risk reduction, there are specific points, such as the induction of anesthesia or the entry into a body cavity, when the team stops and goes through a specific checklist of physiological parameters, equipment readiness, etc. In the discipline of crew resource management, one team member is specifically tasked to ask each structured question, and another member to check the matter and give the answer.

See also

References

  1. National Library of Medicine. Preoperative care. Retrieved on 2007-11-21.
  2. Jaffer, Amir; Gerald Smetana, Steven Cohn, Barbara Slawski (2009-07-01). "Perioperative Medicine Update". Journal of General Internal Medicine 24 (7): 863-871. DOI:10.1007/s11606-009-0965-1. Retrieved on 2009-06-16. Research Blogging.
  3. Glance LG, Lustik SJ, Hannan EL, Osler TM, Mukamel DB, Qian F et al. (2012). "The Surgical Mortality Probability Model: derivation and validation of a simple risk prediction rule for noncardiac surgery.". Ann Surg 255 (4): 696-702. DOI:10.1097/SLA.0b013e31824b45af. PMID 22418007. Research Blogging.
  4. Dalton JE, Kurz A, Turan A, Mascha EJ, Sessler DI, Saager L (2011). "Development and Validation of a Risk Quantification Index for 30-Day Postoperative Mortality and Morbidity in Noncardiac Surgical Patients.". Anesthesiology 114 (6): 1336-1344. DOI:10.1097/ALN.0b013e318219d5f9. PMID 21519230. Research Blogging.
  5. Fleisher LA, Fleischmann KE, Auerbach AD, Barnason SA, Beckman JA, Bozkurt B et al. (2014). "2014 ACC/AHA Guideline on Perioperative Cardiovascular Evaluation and Management of Patients Undergoing Noncardiac Surgery: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines.". J Am Coll Cardiol. DOI:10.1016/j.jacc.2014.07.944. PMID 25091544. Research Blogging.
  6. Poldermans D, Bax JJ, Boersma E, De Hert S, Eeckhout E et al. (2009). "Guidelines for pre-operative cardiac risk assessment and perioperative cardiac management in non-cardiac surgery: The Task Force for Preoperative Cardiac Risk Assessment and Perioperative Cardiac Management in Non-cardiac Surgery of the European Society of Cardiology (ESC) and endorsed by the European Society of Anaesthesiology (ESA).". Eur Heart J. DOI:10.1093/eurheartj/ehp337. PMID 19713421. Research Blogging.
  7. Fleisher LA, Beckman JA, Brown KA, Calkins H, Chaikof EL, Fleischmann KE et al. (2009). "2009 ACCF/AHA focused update on perioperative beta blockade incorporated into the ACC/AHA 2007 guidelines on perioperative cardiovascular evaluation and care for noncardiac surgery: a report of the American college of cardiology foundation/American heart association task force on practice guidelines.". Circulation 120 (21): e169-276. DOI:10.1161/CIRCULATIONAHA.109.192690. PMID 19884473. Research Blogging.
  8. 8.0 8.1 8.2 8.3 8.4 8.5 Fleisher LA, Beckman JA, Brown KA, et al (2007). "ACC/AHA 2007 Guidelines on Perioperative Cardiovascular Evaluation and Care for Noncardiac Surgery: Executive Summary: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the 2002 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery): Developed in Collaboration With the American Society of Echocardiography, American Society of Nuclear Cardiology, Heart Rhythm Society, Society of Cardiovascular Anesthesiologists, Society for Cardiovascular Angiography and Interventions, Society for Vascular Medicine and Biology, and Society for Vascular Surgery". Circulation 116 (17): 1971–1996. DOI:10.1161/CIRCULATIONAHA.107.185700. PMID 17901356. Research Blogging.
  9. Eagle KA, Berger PB, Calkins H, Chaitman BR, Ewy GA, Fleischmann KE et al. (2002). "ACC/AHA guideline update for perioperative cardiovascular evaluation for noncardiac surgery---executive summary a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Committee to Update the 1996 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery).". Circulation 105 (10): 1257-67. PMID 11889023[e]
  10. 10.0 10.1 10.2 10.3 10.4 Brett AS (2007-11-20). Guidelines for Perioperative Cardiovascular Evaluation for Patients Considering Noncardiac Surgery. Retrieved on 2007-11-21.
  11. Winawer N (2008-08-25). Current Guidelines for Preoperative Management Leave Me Wanting More. Retrieved on 2007-11-21.
  12. Fleisher LA, Beckman JA, Brown KA, et al (2007). "ACC/AHA 2007 Guidelines on Perioperative Cardiovascular Evaluation and Care for Noncardiac Surgery: Executive Summary: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the 2002 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery): Developed in Collaboration With the American Society of Echocardiography, American Society of Nuclear Cardiology, Heart Rhythm Society, Society of Cardiovascular Anesthesiologists, Society for Cardiovascular Angiography and Interventions, Society for Vascular Medicine and Biology, and Society for Vascular Surgery". Circulation 116 (17): 1971–1996. PMID 17901356.
  13. Reilly DF, McNeely MJ, Doerner D, et al (October 1999). "Self-reported exercise tolerance and the risk of serious perioperative complications". Arch. Intern. Med. 159 (18): 2185–92. PMID 10527296[e]
  14. Ford MK, Beattie WS, Wijeysundera DN (2010). "Systematic review: prediction of perioperative cardiac complications and mortality by the revised cardiac risk index.". Ann Intern Med 152 (1): 26-35. DOI:10.1059/0003-4819-152-1-201001050-00007. PMID 20048269. Research Blogging.
  15. Eagle KA, Coley CM, Newell JB, et al (June 1989). "Combining clinical and thallium data optimizes preoperative assessment of cardiac risk before major vascular surgery". Ann. Intern. Med. 110 (11): 859–66. PMID 2655519[e]
  16. 16.0 16.1 16.2 16.3 16.4 McFalls EO, Ward HB, Moritz TE, et al (December 2004). "Coronary-artery revascularization before elective major vascular surgery". N. Engl. J. Med. 351 (27): 2795–804. DOI:10.1056/NEJMoa041905. PMID 15625331. Research Blogging.
  17. Wijeysundera DN, Beattie WS, Karkouti K, Neuman MD, Austin PC, Laupacis A (2011). "Association of Echocardiography Before Major Elective Non-Cardiac Surgery With Postoperative Survival and Length of Hospital Stay: Population Based Cohort Study.". BMJ 342: d3695. DOI:10.1136/bmj.d3695. PMID 21724560. PMC PMC3127454. Research Blogging.
  18. Kertai MD, Boersma E, Bax JJ, et al (November 2003). "A meta-analysis comparing the prognostic accuracy of six diagnostic tests for predicting perioperative cardiac risk in patients undergoing major vascular surgery". Heart 89 (11): 1327–34. PMID 14594892. PMC 1767930[e]
  19. 19.0 19.1 Poldermans D, Boersma E, Bax JJ, et al (1999). "The effect of bisoprolol on perioperative mortality and myocardial infarction in high-risk patients undergoing vascular surgery. Dutch Echocardiographic Cardiac Risk Evaluation Applying Stress Echocardiography Study Group". N. Engl. J. Med. 341 (24): 1789-94. PMID 10588963[e]
  20. Boersma E, Poldermans D, Bax JJ, et al (April 2001). "Predictors of cardiac events after major vascular surgery: Role of clinical characteristics, dobutamine echocardiography, and beta-blocker therapy". JAMA 285 (14): 1865–73. PMID 11308400[e]
  21. 21.0 21.1 Lee TH, Marcantonio ER, Mangione CM, et al (1999). "Derivation and prospective validation of a simple index for prediction of cardiac risk of major noncardiac surgery". Circulation 100 (10): 1043–9. PMID 10477528[e]
  22. Cardiology/American Heart Association Task Force on Practice Guidelines (Committee to Update the 1996 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery). ACC/AHA guideline update for perioperative cardiovascular evaluation for noncardiac surgery---executive summary a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Committee to Update the 1996 Guidelines on Perioperative Cardiovascular Evaluation for Noncardiac Surgery). Circulation. 2002 Mar 12;105(10):1257-67. Erratum in: Circulation. 2006 Jun 6;113(22):e846. PMID 11889023]
  23. Boersma E, Kertai MD, Schouten O, et al. (October 2005). "Perioperative cardiovascular mortality in noncardiac surgery: validation of the Lee cardiac risk index". Am. J. Med. 118 (10): 1134–41. DOI:10.1016/j.amjmed.2005.01.064. PMID 16194645. Research Blogging.
  24. Karthikeyan G, Moncur RA, Levine O, Heels-Ansdell D, Chan MT, Alonso-Coello P et al. (2009). "Is a pre-operative brain natriuretic peptide or N-terminal pro-B-type natriuretic peptide measurement an independent predictor of adverse cardiovascular outcomes within 30 days of noncardiac surgery? A systematic review and meta-analysis of observational studies.". J Am Coll Cardiol 54 (17): 1599-606. DOI:10.1016/j.jacc.2009.06.028. PMID 19833258. Research Blogging.
  25. American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines. American Society of Echocardiography. American Society of Nuclear Cardiology. Heart Rhythm Society. Society of Cardiovascular Anesthesiologists. Society for Cardiovascular Angiography and Interventions et al. (2009). "2009 ACCF/AHA focused update on perioperative beta blockade.". J Am Coll Cardiol 54 (22): 2102-28. DOI:10.1016/j.jacc.2009.07.004. PMID 19926021. Research Blogging.
  26. 26.0 26.1 Bangalore S, Wetterslev J, Pranesh S, Sawhney S, Gluud C, Messerli FH (December 2008). "Perioperative beta blockers in patients having non-cardiac surgery: a meta-analysis". Lancet 372 (9654): 1962–76. DOI:10.1016/S0140-6736(08)61560-3. PMID 19012955. Research Blogging.
  27. 27.0 27.1 Ellenberger C, Tait G, Beattie WS (2011). "Chronic β blockade is associated with a better outcome after elective noncardiac surgery than acute β blockade: a single-center propensity-matched cohort study.". Anesthesiology 114 (4): 817-23. DOI:10.1097/ALN.0b013e31820fca0b. PMID 21427537. Research Blogging.
  28. Poldermans D, Schouten O, van Lier F, Hoeks SE, van de Ven L, Stolker RJ et al. (2009). "Perioperative Strokes and beta-Blockade.". Anesthesiology. DOI:10.1097/ALN.0b013e3181ba3bf4. PMID 19786861. Research Blogging.
  29. 29.0 29.1 Badgett RG, Lawrence VA, Cohn SL (2010). "Variations in pharmacology of beta-blockers may contribute to heterogeneous results in trials of perioperative beta-blockade.". Anesthesiology 113 (3): 585-92. DOI:10.1097/ALN.0b013e3181e73eea. PMID 20693881. Research Blogging.
  30. Wallace AW, Au S, Cason BA (2011). "Perioperative β-Blockade: Atenolol Is Associated with Reduced Mortality When Compared to Metoprolol.". Anesthesiology 114 (4): 824-36. DOI:10.1097/ALN.0b013e3182110e83. PMID 21372680. Research Blogging.
  31. Redelmeier D, Scales D, Kopp A (2005). "Beta blockers for elective surgery in elderly patients: population based, retrospective cohort study.". BMJ 331 (7522): 932. DOI:10.1136/bmj.38603.746944.3A. PMID 16210252. PMC PMC1261186. Research Blogging.
  32. 32.0 32.1 Devereaux PJ, Yang H, Guyatt GH, et al (2006). "Rationale, design, and organization of the PeriOperative ISchemic Evaluation (POISE) trial: a randomized controlled trial of metoprolol versus placebo in patients undergoing noncardiac surgery". Am. Heart J. 152 (2): 223-30. DOI:10.1016/j.ahj.2006.05.019. PMID 16875901. Research Blogging.
  33. 33.0 33.1 (May 2008) "Effects of extended-release metoprolol succinate in patients undergoing non-cardiac surgery (POISE trial): a randomised controlled trial". Lancet. DOI:10.1016/S0140-6736(08)60601-7. PMID 18479744. Research Blogging.
  34. Phillips KA, Veenstra DL, Oren E, Lee JK, Sadee W (November 2001). "Potential role of pharmacogenomics in reducing drug-related side effects and adverse reactionss: a systematic review". JAMA 286 (18): 2270–9. PMID 11710893[e]
  35. Anonymous. Entrez Gene: CYP2D6 cytochrome P450, family 2, subfamily D, polypeptide 6 [ Homo sapiens ]. National Library of Medicine. Retrieved on 2009-01-03.
  36. 36.0 36.1 Mangano DT, Layug EL, Wallace A, Tateo I (1996). "Effect of atenolol on mortality and cardiovascular morbidity after noncardiac surgery. Multicenter Study of Perioperative Ischemia Research Group". N. Engl. J. Med. 335 (23): 1713-20. PMID 8929262[e]
  37. 37.0 37.1 Wallace A, Layug B, Tateo I, et al (January 1998). "Prophylactic atenolol reduces postoperative myocardial ischemia. McSPI Research Group". Anesthesiology 88 (1): 7–17. PMID 9447850[e]
  38. Zaugg M, Bestmann L, Wacker J, et al (July 2007). "Adrenergic receptor genotype but not perioperative bisoprolol therapy may determine cardiovascular outcome in at-risk patients undergoing surgery with spinal block: the Swiss Beta Blocker in Spinal Anesthesia (BBSA) study: a double-blinded, placebo-controlled, multicenter trial with 1-year follow-up". Anesthesiology 107 (1): 33–44. DOI:10.1097/01.anes.0000267530.62344.a4. PMID 17585213. Research Blogging.
  39. Miller DR, Martineau RJ, Wynands JE, Hill J (October 1991). "Bolus administration of esmolol for controlling the haemodynamic response to tracheal intubation: the Canadian Multicentre Trial". Can J Anaesth 38 (7): 849–58. PMID 1683818[e]
  40. London MJ, Hur K, Schwartz GG, Henderson WG (2013). "Association of perioperative β-blockade with mortality and cardiovascular morbidity following major noncardiac surgery.". JAMA 309 (16): 1704-13. DOI:10.1001/jama.2013.4135. PMID 23613075. Research Blogging.
  41. Boersma E et al; DECREASE Study Group (Dutch Echocardiographic Cardiac Risk Evaluation Applying Stress Echocardiogrpahy). Predictors of cardiac events after major vascular surgery: Role of clinical characteristics, dobutamine echocardiography, and beta-blocker therapy. JAMA. 2001 Apr 11;285(14):1865-73. PMID 11308400
  42. Lindenauer PK, Pekow P, Wang K, Mamidi DK, Gutierrez B, Benjamin EM. Perioperative beta-blocker therapy and mortality after major noncardiac surgery. N Engl J Med. 2005 Jul 28;353(4):349-61. PMID 16049209
  43. Redelmeier D et al. Beta blockers for elective surgery in elderly patients: population based, retrospective cohort study. BMJ. 2005 Oct 22;331(7522):932. Epub 2005 Oct 6. PMID 16210252
  44. Andersson C et al. Association of ß-Blocker Therapy With Risks of Adverse Cardiovascular Events and Deaths in Patients With Ischemic Heart Disease Undergoing Noncardiac Surgery: A Danish Nationwide Cohort Study JAMA Intern Med. Published online November 18, 2013. doi:[1]
  45. Chopra V, Wesorick DH, Sussman JB, Greene T, Rogers M, Froehlich JB et al. (2012). "Effect of Perioperative Statins on Death, Myocardial Infarction, Atrial Fibrillation, and Length of Stay: A Systematic Review and Meta-analysis.". Arch Surg 147 (2): 181-9. DOI:10.1001/archsurg.2011.897. PMID 22351917. Research Blogging.
  46. 46.0 46.1 Dunkelgrun M, Boersma E, Schouten O, Koopman-van Gemert AW, van Poorten F, Bax JJ et al. (2009). "Bisoprolol and fluvastatin for the reduction of perioperative cardiac mortality and myocardial infarction in intermediate-risk patients undergoing noncardiovascular surgery: a randomized controlled trial (DECREASE-IV).". Ann Surg 249 (6): 921-6. DOI:10.1097/SLA.0b013e3181a77d00. PMID 19474688. Research Blogging.
  47. 47.0 47.1 Schouten O, Boersma E, Hoeks SE, Benner R, van Urk H, van Sambeek MR et al. (2009). "Fluvastatin and perioperative events in patients undergoing vascular surgery.". N Engl J Med 361 (10): 980-9. DOI:10.1056/NEJMoa0808207. PMID 19726772. Research Blogging.
  48. Brett AS (2008). Noncardiac Surgery in Patients with Recently Implanted Coronary Stents - Journal Watch (General). Journal Watch (General).
  49. Nuttall GA, Brown MJ, Stombaugh JW, et al (October 2008). "Time and cardiac risk of surgery after bare-metal stent percutaneous coronary intervention". Anesthesiology 109 (4): 588–95. DOI:10.1097/ALN.0b013e318186ddf8. PMID 18813036. Research Blogging.
  50. 50.0 50.1 Monaco M, Stassano P, Di Tommaso L, Pepino P, Giordano A, Pinna GB et al. (2009). "Systematic strategy of prophylactic coronary angiography improves long-term outcome after major vascular surgery in medium- to high-risk patients: a prospective, randomized study.". J Am Coll Cardiol 54 (11): 989-96. DOI:10.1016/j.jacc.2009.05.041. PMID 19729114. Research Blogging.
  51. 51.0 51.1 51.2 51.3 Poldermans D, Schouten O, Vidakovic R, et al (May 2007). "A clinical randomized trial to evaluate the safety of a noninvasive approach in high-risk patients undergoing major vascular surgery: the DECREASE-V Pilot Study". J. Am. Coll. Cardiol. 49 (17): 1763–9. DOI:10.1016/j.jacc.2006.11.052. PMID 17466225. Research Blogging.
  52. Anonymous (2003). Devices@FDA. Food and Drug Administration. Retrieved on 2009-05-02.
  53. Li Y, Walicki D, Mathiesen C, Jenny D, Li Q, Isayev Y et al. (2009). "Strokes after cardiac surgery and relationship to carotid stenosis.". Arch Neurol 66 (9): 1091-6. DOI:10.1001/archneurol.2009.114. PMID 19752298. Research Blogging.
  54. 54.0 54.1 Gupta H, Gupta PK, Fang X, Miller WJ, Cemaj S, Forse RA et al. (2011). "Development and validation of a risk calculator predicting postoperative respiratory failure.". Chest 140 (5): 1207-15. DOI:10.1378/chest.11-0466. PMID 21757571. Research Blogging.
  55. Arozullah AM, Daley J, Henderson WG, Khuri SF (2000). "Multifactorial risk index for predicting postoperative respiratory failure in men after major noncardiac surgery. The National Veterans Administration Surgical Quality Improvement Program.". Ann Surg 232 (2): 242-53. PMID 10903604. PMC PMC1421137.
  56. Arozullah AM, Khuri SF, Henderson WG, Daley J, Participants in the National Veterans Affairs Surgical Quality Improvement Program (2001). "Development and validation of a multifactorial risk index for predicting postoperative pneumonia after major noncardiac surgery.". Ann Intern Med 135 (10): 847-57. PMID 11712875. Review in: ACP J Club. 2002 Jul-Aug;137(1):36
  57. Johnson RG, Arozullah AM, Neumayer L, Henderson WG, Hosokawa P, Khuri SF (2007). "Multivariable predictors of postoperative respiratory failure after general and vascular surgery: results from the patient safety in surgery study.". J Am Coll Surg 204 (6): 1188-98. DOI:10.1016/j.jamcollsurg.2007.02.070. PMID 17544077. Research Blogging.
  58. Canet J, Gallart L, Gomar C, Paluzie G, Vallès J, Castillo J et al. (2010). "Prediction of postoperative pulmonary complications in a population-based surgical cohort.". Anesthesiology 113 (6): 1338-50. DOI:10.1097/ALN.0b013e3181fc6e0a. PMID 21045639. Research Blogging.
  59. Qaseem A, Snow V, Fitterman N, et al (2006). "Risk assessment for and strategies to reduce perioperative pulmonary complications for patients undergoing noncardiothoracic surgery: a guideline from the American College of Physicians". Ann. Intern. Med. 144 (8): 575–80. PMID 16618955[e]
  60. Smetana GW, Lawrence VA, Cornell JE (2006). "Preoperative pulmonary risk stratification for noncardiothoracic surgery: systematic review for the American College of Physicians.". Ann Intern Med 144 (8): 581-95. PMID 16618956. Review in: ACP J Club. 2006 Sep-Oct;145(2):37
  61. NHLBI, Diagnosis and Management of Asthma. National Heart, Lung, Blood Institute. Retrieved on 2008-01-24.
  62. Møller AM, Villebro N, Pedersen T, Tønnesen H (2002). "Effect of preoperative smoking intervention on postoperative complications: a randomised clinical trial". Lancet 359 (9301): 114–7. PMID 11809253[e]
  63. Freitas ER, Soares BG, Cardoso JR, Atallah AN (2007). "Incentive spirometry for preventing pulmonary complications after coronary artery bypass graft". Cochrane Database Syst Rev (3): CD004466. DOI:10.1002/14651858.CD004466.pub2. PMID 17636760. Research Blogging.
  64. Fernández-Pérez ER, Sprung J, Afessa B, Warner DO, Vachon CM, Schroeder DR et al. (2009). "Intraoperative ventilator settings and acute lung injury after elective surgery: a nested case control study.". Thorax 64 (2): 121-7. DOI:10.1136/thx.2008.102228. PMID 18988659. Research Blogging.
  65. Teh SH, Nagorney DM, Stevens SR, et al (April 2007). "Risk factors for mortality after surgery in patients with cirrhosis". Gastroenterology 132 (4): 1261–9. DOI:10.1053/j.gastro.2007.01.040. PMID 17408652. Research Blogging.
  66. Farnsworth N, Fagan SP, Berger DH, Awad SS (November 2004). "Child-Turcotte-Pugh versus MELD score as a predictor of outcome after elective and emergent surgery in cirrhotic patients". Am. J. Surg. 188 (5): 580–3. DOI:10.1016/j.amjsurg.2004.07.034. PMID 15546574. Research Blogging.
  67. Suman A, Barnes DS, Zein NN, Levinthal GN, Connor JT, Carey WD (August 2004). "Predicting outcome after cardiac surgery in patients with cirrhosis: a comparison of Child-Pugh and MELD scores". Clin. Gastroenterol. Hepatol. 2 (8): 719–23. PMID 15290666[e]
  68. Costa BP, Sousa FC, Serôdio M, Carvalho C (August 2009). "Value of MELD and MELD-based indices in surgical risk evaluation of cirrhotic patients: retrospective analysis of 190 cases". World J Surg 33 (8): 1711–9. DOI:10.1007/s00268-009-0093-4. PMID 19513784. Research Blogging.
  69. Wu WC, Schifftner TL, Henderson WG, et al (June 2007). "Preoperative hematocrit levels and postoperative outcomes in older patients undergoing noncardiac surgery". JAMA 297 (22): 2481–8. DOI:10.1001/jama.297.22.2481. PMID 17565082. Research Blogging.
  70. Karkouti K, Wijeysundera DN, Yau TM, McCluskey SA, van Rensburg A, Beattie WS (April 2008). "The influence of baseline hemoglobin concentration on tolerance of anemia in cardiac surgery". Transfusion 48 (4): 666–72. DOI:10.1111/j.1537-2995.2007.01590.x. PMID 18194382. Research Blogging.
  71. Hajjar, Ludhmila A.; Jean-Louis Vincent, Filomena R. B. G. Galas, Rosana E. Nakamura, Carolina M. P. Silva, Marilia H. Santos, Julia Fukushima, Roberto Kalil Filho, Denise B. Sierra, Neuza H. Lopes, Thais Mauad, Aretusa C. Roquim, Marcia R. Sundin, Wanderson C. Leao, Juliano P. Almeida, Pablo M. Pomerantzeff, Luis O. Dallan, Fabio B. Jatene, Noedir A. G. Stolf, Jose O. C. Auler (2010-10-13). "Transfusion Requirements After Cardiac Surgery: The TRACS Randomized Controlled Trial". JAMA 304 (14): 1559-1567. DOI:10.1001/jama.2010.1446. Retrieved on 2010-10-13. Research Blogging.
  72. Carson JL, Duff A, Berlin JA, et al (January 1998). "Perioperative blood transfusion and postoperative mortality". JAMA 279 (3): 199–205. PMID 9438739[e]
  73. Bracey AW, Radovancevic R, Riggs SA, et al (October 1999). "Lowering the hemoglobin threshold for transfusion in coronary artery bypass procedures: effect on patient outcome". Transfusion 39 (10): 1070–7. PMID 10532600[e]
  74. Smetana GW, Macpherson DS (2003). "The case against routine preoperative laboratory testing.". Med Clin North Am 87 (1): 7-40. PMID 12575882.
  75. Suchman AL, Mushlin AI (1986). "How well does the activated partial thromboplastin time predict postoperative hemorrhage?". JAMA 256 (6): 750-3. PMID 3723774.
  76. Kearon C, Hirsh J (May 1997). "Management of anticoagulation before and after elective surgery". N. Engl. J. Med. 336 (21): 1506–11. PMID 9154771[e]
  77. Dunn AS, Turpie AG (April 2003). "Perioperative management of patients receiving oral anticoagulants: a systematic review". Arch. Intern. Med. 163 (8): 901–8. DOI:10.1001/archinte.163.8.901. PMID 12719198. Research Blogging.
  78. Garcia DA, Regan S, Henault LE, et al (January 2008). "Risk of thromboembolism with short-term interruption of warfarin therapy". Arch. Intern. Med. 168 (1): 63–9. DOI:10.1001/archinternmed.2007.23. PMID 18195197. Research Blogging.
  79. Healey JS, Eikelboom J, Douketis J, Wallentin L, Oldgren J, Yang S et al. (2012). "Periprocedural Bleeding and Thromboembolic Events With Dabigatran Compared With Warfarin: Results From the Randomized Evaluation of Long-Term Anticoagulation Therapy (RE-LY) Randomized Trial.". Circulation 126 (3): 343-348. DOI:10.1161/CIRCULATIONAHA.111.090464. PMID 22700854. Research Blogging.
  80. Douketis JD, Berger PB, Dunn AS, Jaffer AK, Spyropoulos AC, Becker RC et al. (2008). "The perioperative management of antithrombotic therapy: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines (8th Edition).". Chest 133 (6 Suppl): 299S-339S. DOI:10.1378/chest.08-0675. PMID 18574269. Research Blogging.
  81. Douketis JD, Johnson JA, Turpie AG (June 2004). "Low-molecular-weight heparin as bridging anticoagulation during interruption of warfarin: assessment of a standardized periprocedural anticoagulation regimen". Arch. Intern. Med. 164 (12): 1319–26. DOI:10.1001/archinte.164.12.1319. PMID 15226166. Research Blogging.
  82. Witt DM, Delate T, McCool KH, Dowd MB, Clark NP, Crowther MA et al. (2009). "Incidence and predictors of bleeding or thrombosis after polypectomy in patients receiving and not receiving anticoagulation therapy.". J Thromb Haemost 7 (12): 1982-9. DOI:10.1111/j.1538-7836.2009.03598.x. PMID 19719825. Research Blogging.
  83. Sousa R, Muñoz-Mahamud E, Quayle J, Dias da Costa L, Casals C, Scott P et al. (2014). "Is Asymptomatic Bacteriuria a Risk Factor for Prosthetic Joint Infection?". Clin Infect Dis. DOI:10.1093/cid/ciu235. PMID 24723280. Research Blogging.
  84. Cordero-Ampuero J, González-Fernández E, Martínez-Vélez D, Esteban J (2013). "Are antibiotics necessary in hip arthroplasty with asymptomatic bacteriuria? Seeding risk with/without treatment.". Clin Orthop Relat Res 471 (12): 3822-9. DOI:10.1007/s11999-013-2868-z. PMID 23430723. PMC PMC3825921. Research Blogging.
  85. Poirier P, Alpert MA, Fleisher LA, et al. (June 2009). "Cardiovascular Evaluation and Management of Severely Obese Patients Undergoing Surgery. A Science Advisory From the American Heart Association". Circulation. DOI:10.1161/CIRCULATIONAHA.109.192575. PMID 19528335. Research Blogging.
  86. Auerbach AD, Rasic MA, Sehgal N, Ide B, Stone B, Maselli J (2007). "Opportunity missed: medical consultation, resource use, and quality of care of patients undergoing major surgery". Arch. Intern. Med. 167 (21): 2338–44. DOI:10.1001/archinte.167.21.2338. PMID 18039993. Research Blogging.
  87. Roy A, Heckman MG, Roy V (2006). "Associations between the hospitalist model of care and quality-of-care-related outcomes in patients undergoing hip fracture surgery". Mayo Clin. Proc. 81 (1): 28-31. PMID 16438475[e]
  88. Fisher AA, Davis MW, Rubenach SE, Sivakumaran S, Smith PN, Budge MM (2006). "Outcomes for older patients with hip fractures: the impact of orthopedic and geriatric medicine cocare". J Orthop Trauma 20 (3): 172-8; discussion 179-80. DOI:10.1097/01.bot.0000202220.88855.16. PMID 16648698. Research Blogging.
  89. Shiga T, Wajima Z, Ohe Y (2008). "Is operative delay associated with increased mortality of hip fracture patients? Systematic review, meta-analysis, and meta-regression: [Le delai operatoire est-il associe a une mortalite accrue chez les patients atteints d'une fracture de la hanche ? Synthese systematique, meta-analyse et meta-regression]". Can J Anaesth 55 (3): 146-54. PMID 18310624[e]