Hi Concerned Kid and welcome,
really sorry to hear about your fathers liver disease..
My brother has esld also. his body size, causes the same problem.. but he can get to the toilet, most of the time. He is also taking lactulose 3 times a day. When he has a dr apt, he delays his lactulose, and gets diapered. When he gets in bed he uses a diaper and uses a bed pad for accidents. the bed pad helps a lot with the clean up..Its difficult.
Is your father eligible for transplant?