I’ve seen this in lots of nursing homes and hospitals. The staff restricts fluids so they don’t have to change the patients’ diapers as often or take them to the bathroom. The patient invariably develops a bladder infection, which is treated with antibiotics. This becomes a vicious cycle of bladder infections and antibiotics, which ultimately leads to C.diff. infections. C. diff. is difficult to treat and very infectious. Lots of elderly people die from this.
With all modern technology medicine can’t come up with anything better for such situations than the diaper and the portable bedpan. If the patient can still think half clearly and move around in the bed, he/she would probably prefer something that builds plumbing connected elimination facilities into a bed that makes them available when they are wanted and covers them over when they are not wanted. They’d need periodic cleaning, but not on every use.