Abstract:To investigate the safety and efficacy of endoscopic submucosal dissection (ESD) in the removal of gastric and esophageal intraepithelial neoplasia. Methods A retrospective study of the clinical data of patients with gastric or esophageal intraepithelial neoplasia with ESD resection using modified snare or Dual scalpel from December 2014 to January 2018, respectively, from surgical success rate, lesion resection rate, surgery time, intraoperative blood loss, postoperative pathology, postoperative complications, and cost of disposable consumables were compared. Results 40 cases were enrolled in and completed ESD. 20 cases were treated with modified traps for ESD (experimental group), and 20 cases with Dual scalpel for ESD (classic control group). The success rate of surgery was 100.0% in both groups. The intraoperative blood loss and the long-term diameter of the postoperative lesions were respectively not significant (P = 0.342, 0.576). The difference was not statistically significant. In terms of rate, the overall resection rate of the lesions in the experimental group and the control group were 95.0% and 100.0% respectively. There were no complications such as bleeding and perforation in the two groups. The preoperative and postoperative pathology were compared before surgery. One case of high-grade neoplasia in treatment group, squamous cell carcinoma was showed postoperative pathology (performing surgery), one case of high-grade neoplasia pre-operation in control group, carcinoma in situ of esophageal was showed postoperative pathology (lesion distance from the incisor margin and basement > 0.1 cm), the difference was not statistically significant (P = 0.523). The operation time of the difference was statistically significant (P = 0.032), operation in the experimental group and the irradiation group were (72.3 ± 13.4) min, (55.2 ± 16.4) min; the price of the disposable consumables in the experimental group was much lower than the Dual scalpel of the control group. Conclusion The modified “monofilament small head” snare can complete ESD resection of gastroesophageal epithelial neoplasia safely and effectively. Compared with the classic Dual scalpel, except for a slightly longer operation time, the other comparisons are statistically significant. There is no significant difference in appearance. It provides an important clinical and theoretical basis for the promotion of clinically ESD resection of gastric, esophageal intraepithelial neoplasia and submucosal tumors.