I believe some difficulty urinating after surgery is quite common, but doubt it is usually "AP", more a physical consequence. I think it would normally right itself after a few hours or at most days, although I understand it is not unusual for catheterisation to occur to assist with the difficulty. I had a problem in the hours after laparascopic hernia surgery, and was beginning to panic thinking it was my AP affecting me while trying with a bedpan urinal thingy under the covers in a six-man ward with others present in the other beds. But managed to go OK in a toilet when allowed out of bed, about 15 hours after the surgery, still don't know if it was the AP or the 'normal' after-effects of the surgery that had been affecting me earlier.
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