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Der Urologe. Ausg. A · Oct 2010
[Sacral neuromodulation in urology. The emperor's new clothes or effective high-tech medicine?].
- M R Hoda and P Fornara.
- Universitätsklinik und Poliklinik für Urologie mit Nierentransplantationszentrum, Medizinische Fakultät, Martin-Luther-Universität Halle/Wittenberg, Ernst-Grube-Straße 40, 06120 Halle. rhoda@ucsd.edu
- Urologe A. 2010 Oct 1;49(10):1254-9.
AbstractSacral nerve modulation (SNM) is an innovative, minimally invasive treatment that uses chronic low-level electrical stimulation of the sacral plexus to recruit residual physiological function of urinary bladder detrusor, pelvic floor muscles, and the anorectal continence structures. Classic indications for sacral neuromodulation in urology are refractory overactive bladder symptoms (urinary urgency ± incontinence) and chronic nonobstructive urinary retention. SNM also offers a therapeutic alternative in refractory chronic pelvic pain syndrome. The exact mechanism of action is still unknown, but it is assumed that electrical stimulation of the sacral nerves leads to neuromodulation as well as clinically beneficial effects in the pelvic floor, the sphincter complex, and the distal colorectum. SNM is a multistep procedure. In a test phase of so-called percutaneous or peripheral nerve evaluation (PNE), the effect of sacral neuromodulation is evaluated over days or weeks during which a bladder diary/pain protocol is kept. The predictive value of PNE is high, while morbidity and surgical trauma are low. The screening phase provided by PNE makes this technique unique and offers an ideal instrument for patient selection. After final implantation of the neurostimulator (InterStim II), the long-term success rate is over 60-90%. At our clinic, 42 patients underwent a PNE procedure between January 2009 and June 2010. Of these, 34 patients had a >50% success rate and had been implanted with the InterStim II device (80.9%). The success rates were 83% for overactive bladder and 89% for chronic retention (mean follow-up 7.8 months). In addition to the surgical procedure, the exact indication and postoperative care are important prerequisites of successful therapy. To date, no information on the number of implanted stimulators in Germany is available. This suggests the need for establishment of a national prospective registry. It would also be appropriate that the experts from the implantation centers form a working group.
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