新型磁力锚导引系统在内镜黏膜下剥离术中应用的动物实验研究（含视频）

Animal model experiment on application of new magnetic anchoring and guidance system onendoscopic submucosal dissection （with video ）

目的评估新型磁力锚导引系统在猪模型内镜黏膜下剥离术（ESD）中的应用价值及安全性。方法2名熟练ESD操作者对2只实验猪直肠进行磁力锚牵引辅助下ESD，记录分析操作时间、切除效率、完整切除率、并发症等。结果共完成ESD操作5例次，病灶开始标记至完整剥离平均时间为26．6min，单位时间切除率（0．38＋0．1）em。／min。病灶均完整切除且无穿孔和迟发性出血发生。结论磁力锚牵引辅助ESD能有效暴露黏膜下层，提供直视下切除，是一项安全有效的辅助技术。

Objective To evaluate the safety and efficacy of a new magnetic anchoring and guidance system on endoscopic submucosal dissection （ESD） in pig models. Methods Two skilled operators performed ESD at the rectum part of 2 pigs with the help of a new magnetic anchoring and guidance system. The dissection time, dissection rate per unit time, en-bloc resection rate and complications were analyzed. Results Five simulated lesions underwent ESD with the help of the magnetic anchoring and guidance system. The dissection time was 26. 6 min and the dissection rate was 0. 38±0. 1 cm2/min. All the lesions were dissected totally. There was no perforation or delayed bleeding. Conclusion The new magnetic anchoring and guidance system is effective and safe for pig rectal ESD. It can effectively expose submucosal layer, and assist resection under the endoscopic observation.