Head-down tilt
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In medicine, the head-down tilt position, also called the Trendelenburg position, is "posture while lying with the head lower than the rest of the body. Extended time in this position is associated with temporary physiologic disturbances."[1]
| Finding after passive leg raising | Sensitivity | Specificity |
|---|---|---|
| Increase ≥ 9% in pulse pressure as measured by radial arterial catheter | 79% | 85% |
| Increase ≥ 8% in femoral artery blood flow as measured by Doppler ultrasonography | 86% | 80% |
| Increase ≥ 10% in stroke volume as measured by bedside echocardiography | 86% | 90% |
The hemodynamic response to passive leg raising during physical examination, or at least with use of a radial artery catheter, can help predict whether a patient in shock will respond to intravenous infusion of fluids.[2]
References
- ↑ Anonymous (2024), Head-down tilt (English). Medical Subject Headings. U.S. National Library of Medicine.
- ↑ Préau S, Saulnier F, Dewavrin F, Durocher A, Chagnon JL (2010). "Passive leg raising is predictive of fluid responsiveness in spontaneously breathing patients with severe sepsis or acute pancreatitis.". Crit Care Med 38 (3): 819-25. DOI:10.1097/CCM.0b013e3181c8fe7a. PMID 20016380. Research Blogging.