Overactive bladder (OAB) is a clinical syndrome characterized by urinary urgency, frequency, and nocturia with or without accompanying urinary incontinence. Thus, using this operational definition based on symptoms at presentation, urodynamic testing is not required for an initial diagnosis of OAB. An increasing body of evidence suggests that, although there is a relationship between the urodynamic finding of detrusor overactivity and OAB, these are quite separate findings, and successful response to nonsurgical and surgical interventions for OAB does not depend on finding detrusor overactivity on urodynamic testing. The role of urodynamics in the setting of OAB is not well defined at present, but there are several clinical scenarios where such testing may be useful. However, at this time, the evidence to support their routine use in patients with OAB is limited.
The ideal periurethral injectable agent has not yet been identified though many of the currently used agents have acceptable efficacy in selected populations. There is active research into novel therapies that may prove effective.
While the introduction of novel approaches to pelvic organ prolapse provide further options when considering appropriate therapy, the application of these materials and techniques should be examined with scientific rigor and should demonstrate both a significant benefit and low morbidity prior to widespread adoption. With continued research, we hopefully will be able to identify the ideal approaches and repairs to achieve optimal patient outcomes.
The aim of this study is to evaluate the effect of sub-sensory amplitude settings of sacral neuromodulation therapy on overactive bladder symptoms in subjects with urinary urge incontinence. Methods: Subjects who qualified for a neurostimulator device implant were randomized to one of three amplitude settings (50% of sensory threshold [ST], 80% of ST, and ST). Subjects completed urinary voiding diaries (3-day), International consultation on incontinence modular questionnaire-overactive bladder symptoms quality of life questionnaire, and patient global impression of improvement (PGI-I) to assess change in voiding symptoms and quality of life (QoL) from baseline through 12 weeks. Results: Forty-eight subjects had a successful test stimulation, 46 were implanted with a neurostimulator device and 43 completed the 12-week followup visit. The change from baseline to 12 weeks is −3.0 urinary incontinence (UI) episodes/day (95% confidence interval [CI]: −4.4 to −1.7) for the 50% of sensory threshold group, −2.9 UI episodes/day (95% CI: −4.7 to −1.2) for 80% of sensory threshold group, and −3.6 UI episodes/day (95% CI: −5.2 to −1.9) for the sensory threshold group. In each randomized group, improvements were observed in health-related QoL, its subscales, and symptom interference. Subjects across all three randomization groups reported on the PGI-I that their bladder condition was better at 12 weeks compared to before they were treated with InterStim therapy. Conclusion: These findings provide insights into possible advancements in the postimplantation phase of therapy with potential for improved patient comfort and increased device longevity. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
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