I had the same operation 3 weeks ago. My instructions were: I could shower straight away (which I did) but shouldn't need to change dressings; a district nurse would come and check the dressings in a few days. What actually happened was that when I went back to hospital to have my catheter removed 5 days after the operation, the nurse also took off all the dressings. The district nurse turned up on day 6 and checked that everything looked fine. I was given spare dressings by the hospital, but they weren't required.