METHOD FOR FORMING TRANSANAL LOW COLORECTAL ANASTOMOSIS DURING SURGICAL TREATMENT OF PATIENTS WITH RECTAL CANCER Russian patent published in 2023 - IPC A61B17/11 A61B17/00 

FIELD: surgery; oncology; coloproctology.

SUBSTANCE: rectum is mobilized to the pelvic floor muscles with a high intersection of the lower mesenteric vessels, the sigmoid colon and the splenic flexure of the colon are mobilized. A circular anal dilator is installed into the anal canal and a rectal tumor is visualized. At a distance of at least 1 cm from the tumor, a purse-string suture is formed. At a level of 1.5-2.0 cm from the anal ring, the upper edge of the m.puborectalis, a circular transection of the rectum is performed. A minilaparotomy is performed in the left mesogastric region. The rectum with the tumor is removed, the colon is crossed at the border of the descending and sigmoid colon. The stump of the colon is brought down into the anal canal. The rectal stump is stitched with fixing sutures at 12, 3, 6, 9 o'clock according to the conventional dial, through all layers with four threads 4/0 thick and the threads are taken with mosquito clamps. The colon stump is passed through the anus, and the staple suture is cut off. The colon is stitched at 12, 3, 6, 9 o'clock according to the conventional dial, with corresponding threads on the rectum. The interrupted sutures are gradually tightened, after which, in each of the corresponding spaces between the first fixing sutures 12-3, 3-6, 6-9, 9-12, 2 main interrupted sutures are formed through all layers of the colon and rectum. A preventive transverse colostoma is formed in the left mesogastric region.

EFFECT: method is simple to perform, allows to reduce the operation time, form an anastomosis that meets the conditions of tightness, reliability, precision, reduce the frequency of postoperative complications, reduce the period of postoperative recovery, the risk of mortality from postoperative complications, increase the performance of organ-preserving surgical interventions up to 100% and improve the quality of life.

2 cl, 2 ex