Thread ultrasound-guided carpal tunnel release Oct. 01, 2021 Overview Show transcript Overview This incisionless release — known as thread ultrasound-guided carpal tunnel release (TCTR) — uses an abrasive thread looped percutaneously to dissect the transverse carpal ligament (TCL) and is performed using local anesthesia. Receive Mayo Clinic news in your inbox. Sign up VID-20521490 Medical Professionals Thread ultrasound-guided carpal tunnel release