گزارش يك مورد آسيب عصب اولنار پس از عمل جراحي پيوند باي پس عروق كرونري

Ulnar Nerve Involvement Following Coronary Artery Bypass Graft Surgery: A Case Report

Ulnar nerve involvement is the second most common local mononeuropathy. The ulnar nerve consists of motor and sensory fibers that arise in Cg-Ti roots and extends to the lower trunk and medial cord of brachial plexus. Manifestations of this nerve involvement range from elbow pain and intermittent hand paresthesia to marked sensory loss, wasting and weakness of hand muscles and a claw hand. Ulnar nerve lesion in the elbow region commonly follows surgery in which general anesthesia is used (particularly in patients with coronary artery bypass graft surgery). The patient presented in this article was a 56-year-old male who was involved in left ulnar nerve lesion after undergoing coronary artery bypass graft. In electrodiagnostic study we noticed diffused demyelination lesion of the ulnar nerve with dominancy in elbow region along with secondary axonal degeneration. Therefore, suitable positioning of elbow is recommended to avoid the nervous complications of these operations.