LAUSR

In a previous study, we proved that modified cap-assisted endoscopic mucosal resection (mEMR-C) is non-inferior to endoscopic submucosal dissection (ESD) for rectal neuroendocrine tumors smaller than 10mm with a similar complete resection rate. In addition, mEMR-C had a shorter procedure duration time and lower hospitalization costs [1]. However, a snare needs to be precisely placed into the inner groove of the cap during the mEMR-C procedure, which is time-consuming and difficult for an inexperienced doctor. To solve this problem, we proposed a novel cap-assisted endoscopic resection device for resecting of a rectal lesion that might make the procedure much simpler and easier. In the current study, we initially explored the feasibility of this device for endoscopic resection in an in vitro pig model. The cap-assisted endoscopic resection device comprises a transparent cap with a built-in metal snare and a cutting device with a metal hook (▶Fig. 1 a, b, c). Resection with the device was performed as follows (▶Video 1). First, the cutting device with a metal hook was placed into the biopsy channel and then the metal snare was hooked by the metal hook. The transparent cap was then attached to the forward-viewing endoscope. After the endoscope was inserted into the in vitro pig rectum (▶Fig. 1d), the rectal tissue was suctioned into the cap and gripped by tightening the snare. Finally, the rectal tissue was successfully resected (▶Fig. 1 e). In conclusion, this in vitro study demonstrated the feasibility of the cap-assisted endoscopic resection device for endoscopic resection of rectal lesions, which is a promising device for this purpose.