The sacral nerve modulation procedure is done in two stages:
The doctor places an electrode through the skin and tests whether or not your OAB symptoms respond to nerve modulation. If the therapy fails to help, the electrode can easily be removed. If there is a response, you will receive surgery to implant a small device like a pacemaker (programmable pulse generator) above your pelvic bone.
For treatment, the electrode connects the implant to the area to be modulated (Fig. 2). After surgery, you will have a controller outside the body to adjust electrical modulation on the nerves that reach the bladder. You can change modulation to the nerve to affect bladder activity. Sacral nerve modulation can greatly improve your symptoms.
After surgery there is a risk of infection, and you may experience pain in the area of implantation. Over time, the implant or the electrode may move, causing discomfort. The implanted battery can also run out. If this happens, you will need another surgery to replace the battery. Be sure to discuss any of your concerns about these risks with your doctor.