A Randomized, Controlled, Multicenter, Noninferiority Clinical Study of Perioperative and Oncological Safety in Patients With Rectal Cancer

According to the standard laparoscopic anterior rectum resection, the rectum was separated 2-3cm below the tumor, the rectum was severed 1-2cm from the lower edge of the tumor, the rectal stump was connected with the tumor through the anus, and the sigmoid colon was severed 10cm from the upper edge of the tumor. The stapler head was placed in the sigmoid colon stump, and then the sigmoid colon stump was closed with a linear cutting closure device. Then, the sigmoid colon stump is returned to the abdominal cavity through the anus, the distal rectal stump is closed with a suture purse or a linear cutting closure device, and the stapler body is inserted through the anus, and then the anastomosis is completed.