磁锚定技术辅助内镜黏膜下剥离术治疗早期食管癌的实验研究

目的 探讨磁锚定技术辅助内镜黏膜下剥离术(endoscopic submucosal dissection,ESD)治疗早期食管癌的可行性。方法 以6个比格(Beagle)犬离体食管为实验对象,利用自行设计加工的磁锚定装置(锚定磁体和靶磁体),对假定的食管病变黏膜实施ESD。评价手术操作的可行性及便捷性。结果 成功完成6个犬离体食管的ESD。调整锚定磁体位置可灵活控制靶磁体对黏膜的牵拉方向和牵拉力,充分显露黏膜剥离面,并提供组织张力,确保病变黏膜顺利切除。整个过程操作流畅,靶磁体留置方便,术中未出现靶磁体滑脱及黏膜撕伤。结论 磁锚定技术可有效地对病变黏膜进行牵拉,用于ESD进行早期食管癌的治疗安全可行,能够极大地改善内镜下操作体验。

An experimental study of magnetic anchor technique-assisted endoscopic submucosal dissection for early esophageal cancer

Objective To investigate the feasibility of magnetic anchor technique for endoscopic submucosal dissection (ESD) in the treatment of early esophageal cancer. Methods A self-designed magnetic anchoring device (including an anchor magnet and a target magnet) was used to perform ESD on the hypothesized esophageal lesion mucosa of six isolated esophagus of Beagle dogs. The feasibility and convenience of the operation was evaluated. Results ESD of 6 isolated esophagus of dogs was successfully completed. Through adjusting the position of anchor magnet, the pulling direction and force of the target magnet on the mucosa could be flexibly controlled, the mucosal peeling surface was fully exposed, and tissue tension was provided to ensure the smooth removal of the diseased mucosa. The entire operation was smooth, and the target magnet was conveniently retained. No target magnet slippage or mucosal laceration occurred during the operation. Conclusion The magnetic anchor technique is safe and feasible for the ESD, effectively pulling the diseased mucosa in treatment of early esophageal cancer, which can greatly improve the endoscopic operation experience.