Clinical impact of endoscopic devices for colorectal endoscopic submucosal dissection.
OBJECTIVE
Endoscopic submucosal dissection (ESD) allows the en bloc resection of large colorectal tumors. This requires a safe and effective ESD instrument. We compared colorectal ESD outcome using a bipolar or monopolar knife.


METHODS
We retrospectively studied 122 patients and 125 lesions in consecutive cases treated at our hospital. Patients were divided into a bipolar knife group (BKG; n = 45) and a monopolar knife group (MKG; n = 80). Comparisons were based on age and gender, tumor morphology, size and location, specimen size, procedure time, complications, and en bloc resection and curative resection rates.


RESULTS
There were no significant differences in age and gender, tumor morphology, size and location, or specimen size between the 2 groups. The procedure time was significantly shorter in the MKG than in the BKG (p < 0.05). The number of patients for whom the procedure time exceeded 120 min was significantly lower in the MKG than in the BKG (p < 0.05).


CONCLUSIONS
In this study, the monopolar knife was shown to be effective for colorectal ESD with a shorter procedure time.
Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan.
Asuka
A
Harada
Takuji
T
Gotoda
Masakatsu
M
Fukuzawa
Fuminori
F
Moriyasu
D000368:Aged; D002277:Carcinoma / Q000473:pathology / Q000601:surgery*; D003113:Colonoscopy / Q000009:adverse effects / Q000295:instrumentation*; D015179:Colorectal Neoplasms / Q000473:pathology / Q000601:surgery*; D006801:Humans; D007420:Intestine, Large / Q000473:pathology; D061646:Operative Time; D012189:Retrospective Studies