fig4

Figure 4. Failed superficial nerve transposition. (a) The nerve is taut over the epitrochlear bone (*) and kinks at the deep septum (zone 5) for an insufficient transposition; (b) nerve decompression by the release of the flexor carpi ulnaris and deep septum. The circled area shows the region of ischemic injury to the nerve secondary to compression; (c) after external neurolysishasbeen performed, the nerve is prepared for anterior submuscular transposition; (d) following transposition, the nerve lies in a soft and vascular tissue bed without tension