Hi Sandiego,
The internal sphincter is part of the bladder neck that merges into the prostate. With a complete removal of the prostate, this muscle is almost always affected. However, the internal sphincter has only an indirect influence on continence. Its main task is to prevent ejaculate from entering the bladder during ejaculation.
Therefore, a retrograde ejaculation is a common side effect of radical prostate removal. However, the problem of incontinence has another cause. The prostate functions as a constriction and acts as a pressure reducer. The larger it becomes, the less the actual sphincter has to work against the pressure. As a result, it loses strength, similar to any other muscle that is not trained.
When the prostate is removed, the sphincter is suddenly exposed to full bladder pressure. He can no longer hold this pressure because he lacks the strength to do so. This strength must first be rebuilt, which can take some time, depending on the endurance and effectiveness of the training.
If a radical prostate operation is imminent, it is advisable to start training in advance. This can shorten the duration of incontinence after surgery.
Caution is advised when interpreting the numbers mentioned. After a radical prostate operation, almost everyone is initially incontinent. However, targeted training significantly improves incontinence. After one year, only 3-10% of those affected have a continence problem. If the problem persists, for example, an artificial sphincter can help.
cu
Michael