Abstract:Objective To analyze the effect of external floss traction assisted endoscopic submucosal dissection (ESD) in the treatment of early colorectal carcinoma with difficult visual field exposure.Methods 104 patients with early colorectal carcinoma who suffered from visual field difficulties due to conventional ESD exposure from January 2017 to September 2021 were taken as the research object. They were randomly divided into two groups, 52 patients in each group. Both the observation group and the control group were given ESD treatment. The observation group assisted with external dental floss traction during the operation. The clinical application effects of the two groups were compared.Results The observation group had shorten intraoperative operation time compared to the control group, with less intraoperative bleeding, submucosal injection volume, and submucosal injection frequency, and the rate of complete resection and block resection were higher than those in the control group, and the total incidence of complications was lower than that in the control group, the differences were statistically significant (P < 0.05).Conclusion External floss traction assisted ESD in the treatment of early colorectal carcinoma can improve the resection of the lesion, shorten the operation time and reduce the number of operations, and reduce the complications rates.