Sacral nerve stimulation results may be improved by electrodiagnostic techniques

Sacral nerve electrical stimulation (sacral neuromodulation) therapy for pa tients with refractory urge incontinence, frequency and urgency, and nonobs tructive retention yields an effective 75%-80% success rate. Electrodes are surgically implanted if initial percutaneous stimulation testing has a suc cessful clinical response. Unfortunately, up to 50% of patients are denied surgical implantation because of an unsuccessful response to the test stimu lation. In this descriptive study, adding electrodiagnostic monitoring to t he currently used biological monitoring techniques was associated with a re duction in the number of tested patients denied implantation to 20%. These findings suggest that the incorporation of electrodiagnostic techniques may improve the clinical efficacy of sacral stimulation therapy. Randomized pr ospective testing of this hypothesis is suggested.