My question on the rectal catheter was different for the prep as I have charkot disease and I move with great difficulty - so the prep is a bit energetic for my reaction time and I was requesting a rectal catheter to remove the waste before the surgery. Very different story with me. sorry.
AtHome--did your friend have an abdominal drain? My cr surgeon always put one in no matter what surgery I had. It did alert us, once, to an abdominal leak when I started eating after a resection. Its job is to keep any fluid, that shouldn't be in your abdomen, from becoming an issue.
You friend is very lucky to have people who CARE about him!!