Clinical evidence
Overactive bladder long-term study
Sacral neuromodulation delivered by the InterStim™ systems results at five years
The InterStim™ systems are the only sacral neuromodulation (SNM) product with five-year clinical data demonstrating sustained, long-term efficacy and quality of life improvements for patients suffering from overactive bladder (OAB).1,2
There were no unanticipated adverse device effects. The most common AEs were: undesirable change in stimulation (22%, 60/272); implant site pain (15%, 40/272); and therapeutic product ineffective (13%, 36/272).
The following are data from an additional post-approval, five-year, non-randomized, multicenter study showing sustained efficacy of sacral neuromodulation delivered by the InterStim™ systems for patients with urge incontinence, urgency-frequency, and non-obstructive urinary retention.
This study demonstrates long-term efficacy of sacral neuromodulation delivered by the InterStim™ system for the treatment of urinary urge incontinence, urinary urgency-frequency, and urinary retention in patients who had failed or could not tolerate more conservative treatments. The study took place at centers in the United States, Canada, and Europe.
◼ Intent-to-treat patient ◼ Evaluable patients
Evaluable patients — the subset of subjects for whom both baseline and five-year data were available
Intent-to-treat patients — all implanted subjects, including those who dropped out and were imputed as no change from baseline
◼ Intent-to-treat patient ◼ Evaluable patients
Evaluable patients — the subset of subjects for whom both baseline and five-year data were available
Intent-to-treat patients — all implanted subjects, including those who dropped out and were imputed as no change from baseline
The most common adverse events experienced during clinical studies included pain at implant sites, new pain, lead migration, infection, technical or device problems, adverse change in bowel or voiding function and undesirable stimulation or sensations. Any of these may require additional surgery or cause return of symptoms.
For additional safety information, please refer to Indications, Safety, and Warnings.
The InterStim™ systems may offer your patients relief from bladder and bowel symptoms.
† Therapeutic success defined as ≥ 50% improvement.
‡ Numbers reflect completers analysis, which includes all implanted subjects with diary data at baseline and at each follow-up. Clinical success was 83% at 12 months. 76% at 36 months and 67% at 5 years using the modified completers analysis (subjects who either had baseline and follow-up evaluation or withdrew early due to device-related reasons and are considered failures).
§ Response was defined as ≥ 50% improvement in average leaks or voids/day or a return to normal voiding (<8 voids/day).
◊ Minimally Important Difference (MID) = 10 pts
¶ Clinical trial design: multicenter, non-randomized, post-approval study assessed the long-term effects of sacral nerve stimulation. 152 patients were implanted with the InterStim™ system and followed through 5 years post-implant. Primary assessments based on patients’ voiding diaries. Sensitivity analysis accounted for patients missing follow-up visits, or failing to provide a voiding diary during a follow-up visit (i.e., lost to follow-up rate).