A urostomy isn't the same as a catheter. For one, a urostomy is a permanent procedure. It involves surgically creating an opening in your abdomen and using parts of existing organs to make new passageways for urine to leave your body, so it doesn’t go through the bladder.
A urinary catheter involves inserting a tube into the bladder to drain urine. It may be used for a few minutes, days, or on a long-term basis. Most types of urinary catheterization don’t require surgery but are performed by a trained professional.