I had to have surgery Jan 2018 for diverticulitis. The infection was so bad I had to have a temporary colostomy for 6 months. Was in the hospital 10 days. I was not at Mayo. Had it reversed July 2018 and while the reversal went well had complications w/ blockage in small bowel due to adhesions. Went home 17 days later on clear liquids and PICC line for TPN. Everything cleared about 3 weeks later, but in Nov, diverticulitis flared up again. Went to Mayo ER, sent home with antibiotics. 2 weeks later had to go back, in hospital for 6 days. Part of the sigmoid below reversal site was so blocked, they knew they would probably have to due surgery again. Went hone on Dec 20. Only clear liquids. I lost 17 pounds. Jan 2 had another test and blockage was even worse so back to surgery Jan 7, 2019. Ended up with Deloyers procedure and was in hospital for 6 days.
Feeling pretty good now , sometimes dealing with faster bowel transit time. This surgery was done at Mayo in Phx with a colo/rectal surgeon.
Some of my tests included CT scans, xrays, and the dreaded enema with contrast. I made them give me some pain meds when I was inpatient for that one. Naso gastric tubes are also in the realm of possibility. I have had to have them 4 times during this ordeal. They are unpleasant, but effective.
I would talk to your dr about the possibility of them having to do a colostomy and if they plan on reversing it.
Apparently, they cannot sew the bowel back together when it is really infected. Maybe they could treat and get the infection under control before they do the surgery, lowering your chances for a colostomy. I didn’t have that option at the time as my bowel was about to rupture.