. 2017 Aug 28;6(4):e1451–e1456. doi: 10.1016/j.eats.2017.06.005

Table 2.

Pearls and Pitfalls of Endoscopic Anterior Subcutaneous Transposition of Ulnar Nerve

Pearls	Pitfalls
Release by means of retrograde knife should be under arthroscopic visualization to prevent injury to the ulnar nerve. The release of the arcade of Struthers should be performed at the posterior side of the ulnar nerve. Release of the deep fascia should be completed down to the dorsal portal. Release of the intermuscular septum should be continuous along the medial epicondylar ridge. All the fascial bands deep to the flexor pronator retinaculum should be released.	Anterior subcutaneous transposition is not suitable for very muscular patient with thin subcutaneous layer. Caution should be taken during release of the medial intermuscular septum in order to avoid damage to the brachial artery and the median nerve, which are anterior to the septum. Caution should be taken during mobilization of the distal part of the ulnar nerve to avoid damage to the branch of the flexor carpi ulnaris.

Pearls

Pitfalls

Release by means of retrograde knife should be under arthroscopic visualization to prevent injury to the ulnar nerve.
The release of the arcade of Struthers should be performed at the posterior side of the ulnar nerve.
Release of the deep fascia should be completed down to the dorsal portal.
Release of the intermuscular septum should be continuous along the medial epicondylar ridge.
All the fascial bands deep to the flexor pronator retinaculum should be released.

Anterior subcutaneous transposition is not suitable for very muscular patient with thin subcutaneous layer.
Caution should be taken during release of the medial intermuscular septum in order to avoid damage to the brachial artery and the median nerve, which are anterior to the septum.
Caution should be taken during mobilization of the distal part of the ulnar nerve to avoid damage to the branch of the flexor carpi ulnaris.