Experimental model of two-colonoscope surgery for superficially spreading colonic tumors larger than 3 cm in the right colon.
In the present study, we experimentally examined the feasibility of two-colonoscope surgery using two types of forceps to achieve safe, reliable, and complete endoscopic mucosal resection (EMR)/endoscopic submucosal dissection (ESD) of large superficial tumors in the right colon. It was confirmed at all experimental sessions that the two pairs of forceps intersected with each other over a wide angle of at least 90 degrees in the cecum, and that the tips of the forceps could be moved by at least 180 degrees in the longitudinal and horizontal directions. In another experiment, a piece of tissue measuring 3x3 cm or larger could be safely resected from a chicken thigh as the pseudo-tumor. Based on these results, two-colonoscope surgery is considered clinically promising as a next-generation EMR/ESD technique for safe, reliable, and complete resection of superficial tumors of the right colon measuring 3 cm or more in diameter.
Department of Surgery, Tokai University Hachioji Hospital, Tokyo 192-0032, Japan. mukai.masaya@hachioji-hosp.tokai.ac.jp
Masaya
M
Mukai
Takayuki
T
Tajima
Yasuhisa
Y
Oida
Kyoko
K
Kishima
Masato
M
Nakamura
Hiroyasu
H
Makuuchi
D000818:Animals; D002430:Cecal Neoplasms / Q000473:pathology / Q000601:surgery; D002645:Chickens; D003110:Colonic Neoplasms / Q000473:pathology* / Q000601:surgery*; D003113:Colonoscopy; D004195:Disease Models, Animal; D004724:Endoscopy / Q000379:methods*; D006801:Humans; D007413:Intestinal Mucosa / Q000473:pathology