FEASIBILITY OF ENDOSCOPIC SUBMUCOSAL DISSECTION USING DETACHABLE ROBOTIC ASSITIVE DEVICE

Aims:

Endoscopic submucosal dissection (ESD) is a standard treatment treatment of early gastric cancer without lymph node dissection. However, ESD still takes long procedure time and ESD related complications still exist. One of those reason is that there is no proper counter-traction during procedure. Many ways have been tried to overcome these limitations. Recently, our research team developed Endoscopic Assistive Robot (EAR). In this study, we improved previous Endoscopic assistive robot and conducted an in vivo test to evaluate the efficacy and safety of our device.

Methods:

We perform ESD was performed to imaginary gastric lesions in nonsurvival porcine models using our novel robotic asstivie device. EAR can be mounted on GIF-Q260 endoscope and can be passed through overtube to porcine stomach, making it possible for clinical use. We devided two groups, conduected by experts and novice. We measured the time required to complete the ESD and complications involving perforation and significant bleeding in each group.

Results:

Total 12 cases of ESD were done. 2 cases were conventional ESD, each 5 cases were ESD with EAR by expert and novice. There was no significant difference in total procedure time per width, but dissection time was faster than robot ESD. There was no significant time difference between experts and novice. No perioperative complications occurred during the procedure.

Conclusions:

Our endosopic assitive robot reduced dissection time and show its safety. Our robotic device could be helpful, especially in novice endoscopicst.