Are the patients who use urinary drainage bag included in the scope of excused persons?
People who need to use urinary drainage bag due to urine incontinence or other dieases are considered as excused persons (Kasani, Bada’i, I, 28, 29; Marghinani, al-Hidayah, I, 219,220). Such people perform their prayers by performing ablution for each prayer time separately according to the Hanafi school. They may establish as many voluntary or fardh prayers as they want with this ablution within the same prayer time (Marghinani, al-Hidayah, I, 219). According to the Maliki school, the ablution of an excused person is not nullified by the beginning and end of the prayer time but by the things that invalidate ablution other than the excuse (Ibn Rushd, Bidayah, I, 35; Dasuqi, Hashiyah, I, 114-118).
In the event that the excuse of a person causes an extreme hardship to him and he has serious difficulties while performing ablution, he may act by this view of the Maliki school.
Source: Presidency Of Religious Affairs The Turkey, High Board of Religious Affairs FATWAS