Abstract:Objective To compare and investigate the efficacy and safety of cold snare polypectomy (CSP) and hot snare polypectomy (HSP) for colorectal polyps with diameters ≤ 1.0 cm.Methods 1 403 patients with colorectal polyps ( ≤ 1.0 cm) treated in the Affiliated Huai’an No.1 People's Hospital of Nanjing Medical University from June 2018 to March 2020 were selected as research subjects. They were divided into CSP group (n = 213) and HSP group (n = 1 190). The hemoclip applications, the rates of hemorrhage and perforation, the hematischesis rates after polypectomy and the complete resection rate were compared between the two groups.Results The delayed hemorrhage rate of HSP group was significantly higher than that in CSP group (4.9% vs 0.9%, P = 0.003). There were 5 cases of delayed perforation in HSP group, no one in CSP group. The complete resection rate in CSP group was 95.8% (204/213) similar to 97.6% (1 162/1 190) in HSP group.Conclusion CSP is safe and effective in treatment of colorectal polyps ( ≤ 1.0 cm). CSP retains the low risks of delayed bleeding, less hemoclip applications and the low rates of endoscopic hemostasis, has a high complete resection rate compared to HSP.