Objective To observe and compare the efficacy of two different suture methods in end-to-end anastomosis after canine tracheal sleeve resection. Methods Ten canines were randomly divided into extratracheal-submucosal interrupted suture( ES) group and intratracheal-extratracheal bilateral interrupted suture( IE) group on average. After resection of tracheal rings with same amount of rings,the canines received end to end anastomose with extratracheal-submucosal interrupted suture in ES group,and anastomose wit...