中文摘要：

目的：研究牙线牵引辅助技术在上消化道黏膜病变切除中的应用。方法回顾性研究2014年4月至2014年8月复旦大学附属中山医院内镜中心使用牙线牵引辅助治疗的内镜黏膜下剥离术（ESD）10例，观察完整切除率、手术时间、术中并发症及术后复发情况。结果患者中位年龄53．5岁，肿瘤大小为（3．75±0．92）cm，其中4例位于低位食管，其余6例位于胃部。中位手术时间为45 min（范围：30～100 min），操作过程中无穿孔或出血。中位住院时间为3．5 d（范围：3～5 d），病例均无迟发性出血或穿孔。所有标本完整切除，切缘均未及肿瘤组织，无脉管及血管累及。在1到4个月的短期随访后所有病例创面愈合良好，无肿瘤局部复发。结论牙线牵引辅助装置能给 ESD 操作者提供良好的手术视野，在缩短手术时间的同时，降低并发症发生的风险，而且该装置组合简便，能作为 ESD 治疗黏膜病变过程中的一个有效辅助装置。

英文摘要：

Objective To evaluate the advantage of using dental floss traction in treating upper gas-trointestinal mucosal tumor by ESD.Methods Data of 10 patients who had upper gastrointestinal mucosal tumor and accepted ESD assisted by dental floss traction during April 2014 to August 2014,were collected retrospectively.The en bloc excision rate,procedure time,complication rate and follow-up were analyzed. Results The median age of patients was 53.5 years old,average tumor size was 3.75 ±0.92 cm.There were 4 tumors located in esophagus and 6 in stomach.The median surgical time was 45 min （ranging 30-100 min）and the median hospital stay was 3.5 days （ranging 3-5 days）.There was no bleeding or perforation occurred during or after the procedure.All lesions received en bloc resection and the pathology showed no lymphatic or vascular invasion.After short-time of follow-up （ranging 1 to 4 months）,no recurrence or me-tastasis was found.Conclusion Dental floss traction is easy to make,and can provide good vision during the procedure to reduce the operation time and rate of complication.