The implantable InterStim II® sacral nerve stimulation uses mild electrical stimulation of the sacral nerves to control the muscles of the pelvic floor, lower urinary tract, urinary and anal sphincters, and colon. These sacral nerves are located just above the tail bone.

In properly selected patients, the InterStim neurostimulator can dramatically reduce or eliminate symptoms of overactive bladder (OAB), urinary retention, and fecal incontinence.

Sacral Nerve Stimulation therapy is delivered in two procedures. The first is the test to see if the therapy will work for you. A test [temporarily test stimulation] is used before implantation of the InterStim Neurostimulator to see what the effect of the stimulation is on your symptom. If this test is positive, the lead will stay in place and you will proceed to the permanent implant.

The next step, the implant of the Sacral Nerve Stimulation system, is done after a successful test stimulation. It involves placement of a neurostimulator (electronics and battery). The implanted system is entirely under the skin.

Dr. Shashoua has been performing the InterStim procedure for 4 years.

Complications have included infection and pain. The complication rate is less than 5% and there have been no nerve complications.

Success rate depends on the reason InterStim was placed. Overall, the success rate, as defined by a 50% or greater improvement in pre-operative symptoms, is over 80% in patients who pass the test trial.

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