SX-One MicroKnife - SX-One MicroKnife is rebranded as UltraGuideCTR. UltraGuideCTR is intended to transect the transverse carpal ligament for the treatment of carpal tunnel syndrome.UltraGuideCTR is a disposable device intended to create space within the carpal tunnel and transect the transverse carpal ligament (TCL) for the treatment of carpal tunnel syndrome.