Endoscopic Carpal Tunnel Release Without Invading the Tunnel: A New Transretinacular Technique.

Established endoscopic carpal tunnel release (ECTR) techniques carry a not entirely eludible risk of iatrogenic complications, mainly because of incomplete view of the cutting blade and intraoperative pressure increase inside the carpal tunnel (CT). We describe a novel single-portal ECTR method, conceived to reduce these risks, by optimizing visual control and avoiding dilatation of the CT. After incising the well exposed proximal third of the transverse carpal ligament (TCL), transection of the remainder is completed using a pediatric urethrotome.