Mechanical and bacteriologic preparation for colorectal surgery: evolution and current recommendations. Associations of Research in Surgery

Before surgical resection of the colon and/or rectum, we propose: 1) mechanical preparation of the intestine using X prep Sarget (1 pack, 120 mg, diluted in water or two packs in case of obesity) and an antiseptic (iodine polyvidone) (two 2-liter enemas at 5%, one the day before surgery and one 2 hours prior to surgery) associated with; 2) bitherapy (1 g dose of ceftriaxone plus 1 g ornidazole or metronidazole diluted in 125 mg saline solution, for 15 minutes) administered parenterally at least half an hour before the skin incision.

Published by Journal de chirurgie, 1999. The guideline itself is at the source linked here.

pubmed.ncbi.nlm.nih.gov/10615590/