The effect of the surgical treatment for carpal tunnel syndrome.

概要

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In the past six years, we carried out surgery for carpal tunnel syndrome of twenty-two cases. Nine cases had the release of the volar carpal ligament alone, and thirteen cases had internal neurolysis adjunct to that. The latter was carried out when there was a pseudoneuroma, a marked narrowing or atrophy of the nerve. And, preoperatively, sixty-four per cent of the patients had loss of sensory nerve action potential (SAP). We examined the result of the operation, that is the improvement of symptom, the duration of the recovery, and the nerve-conduction studies. At any rate, all cases had improvement in the result of the operation, sixty-seven per cent in the former, seventy-seven per cent in the latter were remarkable. And within a month, fifty-six per cent in the former, fifty-four per cent in the latter appeared to have a tendency to recovery. In the nerveconduction studies, SAP came to appear in seventy-one per cent of the preoperative loss of that. Internal neurolysis appeared to have a more favorable result to carpal tunnel syndrome with marked degeneration of the median nerve.