One-stage sutures refer to sutures immediately after wound debridement and require a less infected wound with more regular wound edges. If the patient has a very heavily contaminated wound, or even an inflamed, infected wound, a one-stage suture is not acceptable. Because wound infection can also occur after suturing, the sutures also need to be removed and changed, so we have to wait for the wound inflammation to subside before suturing, which is a second-stage suture. During surgical procedures, such as colon tumor, if elective surgery is chosen, the intestine can be sutured in one stage after tumor removal if the intestine is very well prepared. If the patient’s intestinal tract is very poorly prepared for emergency surgery, or if the intestinal tract has a lot of feces, the tumor should be removed and a fistula should be performed. After three months, the patient can then consider surgery to anastomose the intestinal canal.