[Is transposition of the ulnar nerve in ulnar nerve sulcus syndrome really indicated?].

Anterior transposition of the ulnar nerve in cubital tunnel syndrome requires ligation of the segmental epineural vessels over 8 to 10 cm in order to free up and mobilize the nerve along its new course. As a result, the blood supply of ulnar nerves already compromised by entrapment is likely to be harmed even more. For the past three years we chose to perform simple decompression of the nerve with or without external/internal neurolysis on 33 patients (34 arms). After a follow-up time of six months to three years (mean 12 months), the outcome was evaluated by complete examination of hand function and by electrophysiologic studies. Four patients were excluded from the analysis due to short follow-up times. Four underwent decompression for mild entrapment symptoms, six for moderate symptoms, and 19 for severe symptoms. The functional outcome was rated as excellent in 26.7% (eight patients) and as good in 33.3% (ten patients). In group 3 (severe entrapment symptoms), seven patients (23.3%) showed moderate results and in four patients (13.3%) the outcome was poor. Considering that most of our patients had severe entrapment with advanced muscle atrophy, the overall outcome of decompression was satisfactory.