Arthur
I have had around 12 trial without catheter and never failed. Mine usually took around three hours. I usually drank plenty of water before getting to the hospital, I find that if i am well hydrated before getting to the hospital the water they give me to drink at the TWOC passes through me far quicker. It is better to leak a bit than have a catheter put back in because you failed the TWOC. The removal is frequently described as weird, it should be pain free. If it gets stuck on the way out ask for a urologist to attend, my surgeon is convinced a swift removal after getting stuck caused my post op stricture issues.
Make sure you have some pads, the hospital will normally give you some, but as a work colleague used to say better to be looking at some than looking for some. I took a towel and cover for the car seat in case of a "major" leak but it never happened. I also had a urine bottle in the car in case of an emergency. The towel is useful if stuck in a traffic jam with a coachload of people at the side of youπ. You could take a spare pair of trousers and pants, again i never needed them. Elasticated waist trousers make it very easy to change the pad in a hurry.
Once the catheter is removed remember to contract those pelvic muscles as you are going from sitting to standing up, this is when lots of us experienced a leak.
Thanks Chris