Abstract:Objective To explore the clinical efficacy of reopenable-clip over-the-line method (ROLM) in closing mucosal defects after endoscopic submucosal dissection (ESD) of the colon and rectum.Methods A retrospective analysis was conducted on the clinical data of 15 patients who underwent ESD due to early colorectal tumors and were treated with ROLM to close mucosal defects from January 2024 to June 2024. Observe the relevant conditions of the patient's lesion (lesion site, maximum diameter of defect and postoperative pathology), surgery-related conditions (successful defect closure rate after surgery, the number of titanium clips used, ROLM suture time and hospital stay), the occurrence of postoperative complications and postoperative follow-up.Results The successful closure rate of postoperative defects was 100%. The long diameter of the lesion ranged from 3.0 to 6.0 cm, with a mean of (3.7 ± 0.8) cm. The number of titanium clamps used is 7 to 20, with a median of 11 (10, 13). The defect was located in the ileocecal region in 1 case, the ascending colon in 6 cases, the hepatic curve of the transverse colon in 1 case, the descending colon in 2 cases, the sigmoid colon in 3 cases, and the rectum in 2 cases. Postoperative pathology showed 8 cases of tubular adenoma, 1 case of submucosal cyst, 5 cases of tubulovillous adenoma, and 1 case of gastrointestinal stromal tumor. The ROLM suture time ranged from 13 to 37 minutes, with a mean of (19.3 ± 6.5) min. The hospital stay was 4 to 9 days, with a mean of (6.5 ± 1.2) d. No complications such as bleeding, perforation, infection or digestive tract stenosis occurred after the operation. Colonoscopy was reexamined 3 to 6 months after the operation, and all the surgical wounds healed well.Conclusion ROLM can safely and effectively close mucosal defects after colorectal ESD. It is worthy of clinical promotion and application.