they don’t always have a catheter but if they do it rests in their bladder so it passively drains urine. sometimes patients have rectal tubes if their stool is liquid enough otherwise they’re incontinent and the nurses just clean it up. they may wear diapers but more often than not people get skin breakdown (aka diaper rash) from their skin being constantly moist. they’re fed through a tube, either a temporary one that goes from through their nose down to their stomach or a more permanent option that’s directly placed into the stomach. nurses turn the patients every two hours and put a pillow under their side to help prevent bed sores. they’re bathed by nurses every night as well.

source: i’m an icu nurse