We have discussed that static measures of volume (CVP, PA wedge pressures) are not reliable markers of fluid responsiveness
PLR has recently gained interest as a simple and transient way to assess fluid responsiveness in the critically ill
Patients are placed in the horizontal position (not Trendelenburg) and the legs are raised to 45 degrees
A hemodynamic response should be seen in 30 - 90 seconds
Patients who have improvement in hemodynamics with PLR are said to be fluid responsive (i.e on the ascending portion of their Starling Curve) and require additional volume resuscitation
References
Monnet X, Teboul JL. Passive leg raising. Intensive Care Med 2008;34:659-63.
