Sonographic monitoring of endoscopic carpal tunnel release.

We evaluated the effectiveness of sonographic monitoring of endoscopic carpal tunnel release for the prevention of median nerve or arterial injury and incomplete release of the flexor retinaculum (FR). When the outer tube (OT) was inserted, we used sonography to confirm the relationship of the OT, median nerve, ulnar artery, and superficial palmar arch. Under real-time US monitoring, the OT was lifted up before and after FR release, the so-called lift-up test, to evaluate its mobility under sonography and confirm complete FR release. © 2016 Wiley Periodicals, Inc. J Clin Ultrasound 44:597-599, 2016.