Spinal puncture: Difference between revisions

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A '''spinal puncture''', also called a '''spinal tap''', '''lumbar puncture''', or '''LP''' is "tapping of the subarachnoid space in the lumbar region, usually between the third and fourth lumbar [[vertebra]]e.<ref>{{MeSH}}</ref><ref name="pmid17062865">{{cite journal |author=Straus SE, Thorpe KE, Holroyd-Leduc J |title=How do I perform a lumbar puncture and analyze the results to diagnose bacterial meningitis? |journal=JAMA |volume=296 |issue=16 |pages=2012–22 |year=2006 |month=October |pmid=17062865 |doi=10.1001/jama.296.16.2012 |url=http://jama.ama-assn.org/cgi/pmidlookup?view=long&pmid=17062865 |issn=}}</ref><ref name="pmid17005943">{{cite journal |author=Ellenby MS, Tegtmeyer K, Lai S, Braner DA |title=Videos in clinical medicine. Lumbar puncture |journal=N. Engl. J. Med. |volume=355 |issue=13 |pages=e12 |year=2006 |month=September |pmid=17005943 |doi=10.1056/NEJMvcm054952 |url=http://content.nejm.org/cgi/pmidlookup?view=short&pmid=17005943 |issn=}}</ref>
A '''spinal puncture''', also called a '''spinal tap''', '''lumbar puncture''', or '''LP''' is "tapping of the subarachnoid space in the lumbar region, usually between the third and fourth lumbar [[vertebra]]e.<ref>{{MeSH}}</ref><ref name="pmid17062865">{{cite journal |author=Straus SE, Thorpe KE, Holroyd-Leduc J |title=How do I perform a lumbar puncture and analyze the results to diagnose bacterial meningitis? |journal=JAMA |volume=296 |issue=16 |pages=2012–22 |year=2006 |month=October |pmid=17062865 |doi=10.1001/jama.296.16.2012 |url=http://jama.ama-assn.org/cgi/pmidlookup?view=long&pmid=17062865 |issn=}}</ref><ref name="pmid17005943">{{cite journal |author=Ellenby MS, Tegtmeyer K, Lai S, Braner DA |title=Videos in clinical medicine. Lumbar puncture |journal=N. Engl. J. Med. |volume=355 |issue=13 |pages=e12 |year=2006 |month=September |pmid=17005943 |doi=10.1056/NEJMvcm054952 |url=http://content.nejm.org/cgi/pmidlookup?view=short&pmid=17005943 |issn=}}</ref><ref name="pmid3518565">{{cite journal| author=Marton KI, Gean AD| title=The spinal tap: a new look at an old test. | journal=Ann Intern Med | year= 1986 | volume= 104 | issue= 6 | pages= 840-8 | pmid=3518565
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=3518565 }} <!--Formatted by http://sumsearch.uthscsa.edu/cite/--></ref>


==Procedure==
==Procedure==
Use of an 'atraumatic needle' may reduce the chance of [[headache]], although this needle is more difficult to use and may increase the number attempts needed before successful puncture.<ref name="pmid17062865"/> Reinsertion of the stylet before needle removal decreases headache.<ref name="pmid17062865"/>
Use of an 'atraumatic needle' may reduce the chance of [[headache]], although this needle is more difficult to use and may increase the number attempts needed before successful puncture.<ref name="pmid17062865"/> Reinsertion of the stylet before needle removal decreases headache.<ref name="pmid17062865"/>
To accurately measure the opening pressure of the cerebrospinal fluid:
* The patient should be laying (not sitting)<ref>Loman J, Myerson A, Goldman D. Effects of alterations in posture on the cerebrospinal fluid pressure. Arch Neurol Psych. 1934:1279-1295. **/ref><ref name="pmid1271089">{{cite journal| author=Magnaes B| title=Body position and cerebrospinal fluid pressure. Part 1: clinical studies on the effect of rapid postural changes. | journal=J Neurosurg | year= 1976 | volume= 44 | issue= 6 | pages= 687-97 | pmid=1271089
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=1271089 | doi=10.3171/jns.1976.44.6.0687 }} <!--Formatted by http://sumsearch.uthscsa.edu/cite/-->**</ref><ref name="pmid1271090">{{cite journal| author=Magnaes B| title=Body position and cerebrospinal fluid pressure. Part 2: clinical studies on orthostatic pressure and the hydrostatic indifferent point. | journal=J Neurosurg | year= 1976 | volume= 44 | issue= 6 | pages= 698-705 | pmid=1271090
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=1271090 | doi=10.3171/jns.1976.44.6.0698 }} <!--Formatted by http://sumsearch.uthscsa.edu/cite/--></ref>
* The patient's neck should be relaxed to prevent Queckenstedt's test which can raise pressure by 10-20 cm<ref name="pmid5005427">{{cite journal| author=Deliyannakis E| title=Influence of the position of the head on the cerebrospinal fluid pressure. Variations of the Queckenstedt sign. | journal=Mil Med | year= 1971 | volume= 136 | issue= 4 | pages= 370-2 | pmid=5005427
| url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=5005427 }} <!--Formatted by http://sumsearch.uthscsa.edu/cite/-->**</ref>


==References==
==References==
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Revision as of 07:26, 19 October 2009

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A spinal puncture, also called a spinal tap, lumbar puncture, or LP is "tapping of the subarachnoid space in the lumbar region, usually between the third and fourth lumbar vertebrae.[1][2][3][4]

Procedure

Use of an 'atraumatic needle' may reduce the chance of headache, although this needle is more difficult to use and may increase the number attempts needed before successful puncture.[2] Reinsertion of the stylet before needle removal decreases headache.[2]

To accurately measure the opening pressure of the cerebrospinal fluid:

  • The patient should be laying (not sitting)Cite error: Closing </ref> missing for <ref> tag[5]
  • The patient's neck should be relaxed to prevent Queckenstedt's test which can raise pressure by 10-20 cm[6]

References