The effect of elevation on digital blood pressure

Elevation of the hand is recommended for all patients undergoing hand surgery to decrease the swelling in the hand. This study was designed to look at the effects of elevation of the hand on digital blood pressure at different elevation positions. Digital blood pressure was recorded using a digital plethysmograph in 30 subjects for increasing levels of elevation above the heart. Friedmanʹs test was applied to the blood-pressure changes recorded in the four positions of the upper limb and showed a significant sustained fall in mean blood pressure with increasing elevation, bringing into question the use of elevation in certain clinical situations.