Which measure indicates success with sacral neuromodulation for urinary retention?

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Measuring how well sacral neuromodulation improves bladder emptying in urinary retention. The goal of this therapy is to lessen the need for catheterization by helping the bladder void more effectively. A decrease in catheterization volume shows that the patient can empty the bladder with less artificial drainage, meaning the neuromodulation is producing better neural control of the bladder and sphincter. In contrast, other signs would point in the opposite direction: voided volume that’s smaller suggests poorer voiding, a higher post-void residual means more urine remains after voiding, and a longer time to void indicates slower or less efficient urination. So, the best indicator of success is a reduction in the catheterization volume.