INFLUENCE OF OBESITY ON SPINAL ANALGESIA WITH ISOBARIC 0.5% BUPIVACAINE
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TL;DR
There was a correlation between the height of blockade assessed by pinprick analgesia and the degree of obesity of the patients measured by weight, weight/ height, and weight/height2.
Abstract
In an unblinded study 50 patients undergoing cystoscopic procedures received a spinal anaesthetic of plain 0.5% bupivacaine 4 ml administered in the sitting position at the L3-4 space. There was a correlation between the height of blockade assessed by pinprick analgesia and the degree of obesity of the patients measured by weight, weight/height, and weight/height2. Using this dose of spinal anaesthetic agent, high blockade may be anticipated in obese patients.