Ulnar Nerve and Arm Position


Background Although the ulnar nerve is the most frequent site of perioperative neuropathy, the mechanism remains undefined. The ulnar nerve appears particularly susceptible to external pressure as it courses through the superficial condylar groove at the elbow, rendering it vulnerable to direct compression and ischemia. However, there is disagreement among major anesthesia textbooks regarding optimal positioning of the arm during anesthesia. Methods: To determine which arm position (supination, neutral orientation, or pronation) minimizes external pressure applied to the ulnar nerve, we studied 50 awake, normal volunteers using a computerized pressure sensing mat. An additional group of 15 subjects was tested on an operating table with their arm in 30°, boo, and 90" of abduction, as well as in supination,

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@inproceedings{Prielipp2006UlnarNA, title={Ulnar Nerve and Arm Position}, author={Richard Carl Prielipp and R. Morel and Francis 0 . Walker and Carlos C . Santos and Judy Bennett and II John Butterworth}, year={2006} }