Abstract: Objective To evaluate the efficacy and safety of colonoscopic placement of self-expandable metal stent without fluoroscopic monitoring for acute colorectal obstruction.
Methods The clinical data of 58 cases of acute colonic obstruction treated with metal stent in Shanghai Eighth People's Hospital from January 2017 to December 2019 were analyzed retrospectively.30 cases were operated under fluoroscopy,28 cases were operated without fluoroscopic monitoring.The differences in operation time,success rate and complications between the two groups were analyzed.
Results The operative time of fluoroscopy group was 15-135 minutes,with an average of(38±7.4) minutes,and that of non-fluoroscopy group was 20-75 minutes,with an average of(34±5.1) minutes,respectively.There was no significant difference between the two groups(P＞0.05).The cumulative fluoroscopy time of fluoroscopy group was 2-30 minutes,with an average of(4.2±2.8) minutes.The success rate of stent placement was 100%,the symptoms of colonic obstruction were relieved,and there were no surgical complications such as intestinal perforation.
Conclusion Colonoscopy guided placement of self-expandable metallic stents without fluoroscopic monitoring in emergence management for acute colorectal obstruction is effective and safe technique.

Key words: acute colorectal obstruction, self-expandable metal stent, non-fluoroscopy