Objective: To determine the potential risk factors of delayed hemorrhage after endoscopic submucosal dissection (ESD) in patients with early gastric carcinomas or precancerous lesions. Methods: The clinical data of 637 patients with early gastric carcinomas (EGC) who treated with ESD in Department of Endoscopy at Cancer Hospital, Chinese Academy of Medical Sciences, from August 2013 to August 2019, were retrospectively analyzed. Univariate analysis and multivariate logistic analysis were conducted to evaluate the risk factors associated with delayed bleeding. Results: A total of 699 lesions in 637 patients, of which 696 lesions were resected enbloc, the curative resection rate was 92.1% (644/699). The pathological diagnosis after ESD showed that 46 cases were low-grade intraepithelial neoplasia, 71 were high-grade intraepithelial neoplasia, and 582 were cancer. Delayed bleeding occurred in 74 lesions, while other 625 lesions without postoperative bleeding. The incidence was 10.6%. Compared with the non-bleeding group, there were statistically significant differences in the maximum length of the lesion, the gross shape of the lesion, the control of intra operative bleeding, and the operation time in the delayed bleeding group (P<0.05). Multivariate logistic regression analysis showed that the maximum length of the lesion and the gross shape of the lesion were independent factors of delayed bleeding after ESD. Delayed bleeding was inclined to occur in patients with lesion size ≥3.0 cm (OR=1.958, 95% CI: 1.162-3.299) and the superficial and flat lesion (OR=10.598, 95% CI: 1.313-85.532) after ESD. Conclusions: The maximum length of the lesion and the gross shape of the lesion are independent impact factors of delayed bleeding occurring in patients with EGC and precancerous lesions after ESD. Patients with lesion size≥3 cm, or superficial flat lesion should be paid attention after ESD operation. It needs to take timely measures to prevent the very likely bleeding in order to ensure postoperative recovery and improve the quality of life for postoperative patients.
目的： 探讨早期胃癌及癌前病变内镜黏膜下剥离术(ESD)术后迟发性出血的危险因素。 方法： 2013年8月至2019年8月于中国医学科学院肿瘤医院行ESD治疗且病理诊断为早期胃癌或癌前病变的637例患者，收集患者的临床资料。于ESD术后密切随访患者的迟发性出血情况并及时进行处理。采用单因素分析和Logistic多因素回归分析明确ESD术后发生迟发性出血的危险因素。 结果： 637例患者共699处病变，其中696处病变整块切除，治愈性切除率为92.1%(644/699)。ESD术后病理诊断为低级别上皮内瘤变46处，高级别上皮内瘤变71处，癌582处。74处病变发生迟发性出血，625处病变未发生术后出血，发生率为10.6%。迟发性出血组与未出血组比较，病变最大径、病变大体形态、术中出血控制情况和手术时间差异有统计学意义(均P<0.05)。多因素Logistic回归分析显示，病变最大径、病变大体形态是ESD术后迟发性出血的独立影响因素，病变≥3.0 cm(OR＝1.958，95% CI：1.162～3.299)、病变大体形态为浅表平坦型(OR＝10.598，95% CI：1.313～85.532)的患者ESD术后亦发生迟发性出血。 结论： 病变最大径、病变大体形态是早期胃癌及癌前病变ESD术后迟发性出血的独立影响因素。ESD术后，应重点关注病变≥3 cm、病变大体形态为浅表平坦型的患者，及时采取预防出血的措施，以保证患者的术后康复，改善患者术后的生活质量。.
Keywords: Delayed bleeding; Endoscopic submucosal dissection; Gastric neoplasm; Precancerous lesion; Risk factor.