Prospective Cohort Study on the Safety and Efficacy of Endorobotics for Endoscopic Submucosal Dissection (Endorobotics ESD)

All patients received robotic ESD under general anesthesia or monitored anaesthetic care at the endoscopy center of Prince of Wales Hospital. The targeted lesion would first be localized and pre-injected using a mixture of normal saline, indigocarmine, epinephrine and sodium hyaluronate. The robotic endoscopic traction device was then inserted to reach the target. Mucosal incision first started from the anal side followed by lifting with the grasper\[Figure 1; Video 1\]. Vio 3 diathermy system (ERBE, Germany) was used with endocut Q effect 3 and forced coagulation effect 3. Further submucosal dissection would be performed by electrocautery knife with traction achieved via EndoRobotics traction. Upon completion, the specimen would be retrieved upon withdrawal of the whole system.