The effects of leg elevation were different, however.
The passive leg raising test consists in measuring the hemodynamic effects of a leg elevation up to 45°.
Significant axial forces and bending moments were measured during several activities such as sitting, unsupported leg elevation and partial weight bearing in a standing position.
When cardiac load is increased by leg elevation, however, use of the Frank-Starling mechanism is enhanced in open chest-open pericardium conditions.
Treatment included elastic compression and leg elevation in all patients and greater saphenous vein stripping in patients with superficial venous reflux.
The entrainment rate decreases dramatically with the mixture liquid level in the pressure vessel when the liquid level drops below the hot leg elevation.
The head of the bed was then elevated to 30 degrees according to 2 protocols: (1) supine for 10 minutes without leg elevation alternating with 10 minutes of side-lying, or (2) supine for 10 minutes with leg elevation at 10 degrees alternating with side-lying every 10 minutes.
Cutoffs estimated by Youden index NPV negative predictive value, ΔCDPV carotid peak velocity variation, SVV stroke volume variation, PLR Delta SVI rise in stroke volume index after passive leg elevation test, PPV pulse pressure variation aPositive predictive value.
Arterial wall stiffness has less influence on the pole test, based on hydrostatic pressure derived by leg elevation, and this test seems to provide a reliable index of CLI.
Measurements and Main Results: Consecutive data were obtained during a progressive increase in left ventricular pressures and volumes obtained by leg elevation in closed chest-closed pericardium and open chest-open pericardium conditions.
Objective: This pilot study was undertaken to determine the effects of a 10-degree leg elevation for 30-degree head-up position on body displacement and sacral interface pressure for 2 hours.
