Experimental: Stent-based Diverting Technique

For Stent-based Diverting Technique, the small intestine measuring 15 cm from the ileocecal junction was pulled out through the median incision in the lower abdomen. After a length-wise incision was established in the mesenteric margin of the small intestine, the degradable stent was implanted, and the intestine was sutured. Then, the stent was held in place using an external tie around the bowel. Next, a mushroom-like tube (28 Fr) was placed into the intestine proximal (5-10 cm) to the aforementioned stent. The other side of the mushroom-like tube was inserted through the right lower abdominal wall and connected with a drainage bag. An abdominal drainage tube, or an anal tube, if necessary, was inserted in the proper location prior to the closure of the incision and the abdominal cavity. Abdominal X-ray was routinely performed every week to detect stent degradation, and the mushroom-like tube (28 Fr) was removed two days after stent degradation.

Active_comparator: Ileostomy

There will be an ileostomy for the control group. An incision with a diameter of 2 cm will be performed in the lower abdomen, and layers will be separated into the abdominal cavity. The intestine, 20cm to the ileocecal juction under laparoscopic vision, will be pulled out. The anterior sheath of the rectus abdominis and the serous layer of the intestine will be sutured with an absorbable line. Then, the middle point of the mesangial margin of the intestine will be transected, and the intestine will be fixed on the skin. No volvulus or angular formation of the intestine should be confirmed laparoscopically.