Superselective vascular surgery of rectum and sigmoid colon

The preparation of laparoscopic surgery is similar with open surgery: (I) treat hypoproteinemia and anemia; (II) cure the electrolyte disturbances, and gastrointestinal decompression of pyloric obstruction patients; (III) soft semi-liquid diet 2 days before surgery and liquid diet 1 day before surgery; (IV) bowel preparation; (V) apply the stomach tube or nasal feeding tube preoperatively; (VI) skin preparation.