If a man was having trouble passing water, and a catheter was inserted into the bladder, will his fast break? Imām Abū Hanīfā R.A and Imām Muhammad R.A are of the opinion that his fast will not break. This is because there is no direct passage between the urethra and the stomach, therefore, the fast will not break. However, if a woman was to insert some medicine in her vagina, her fast will break as there is a direct passage to her stomach.

مشائل رفعة قاسمى ص 115 . جديد فقهى مسائل ص 97

Extracted from A Gift for Ramadhan, Page 68.

A Gift For Ramadhan – New 3rd Revised Edition