Aims: To report the initial clinical experience with selective bladder denervation (SBD) of the trigone in women with refractory overactive bladder (OAB).
Methods: Females with refractory OAB underwent SBD of the bladder sub-trigone region. Patients were treated using a 10-s voltage-controlled radiofrequency (RF) algorithm (RF10) at study onset. The protocol was modified during the study after which point remaining patients received 60-s temperature-controlled RF (RF60). Patients were followed for 12 weeks and evaluated for adverse events and changes in OAB symptoms. Exploratory analyses on the influence of RF duration were performed.
Results: Among 63 patients, SBD resulted in statistically significant and clinically important improvements for most outcomes. Comparing RF10 (n = 34) to RF60 (n = 29), treatment benefit was greater with RF60 including mean reduction in urgency urinary incontinence (-2.5 vs -0.9; P < 0.01), urinary incontinence (-2.6 vs -0.8; P < 0.001), and total urgency and frequency score (-13 vs -7; P = 0.02); and improvements in symptom bother (-33 vs -18; P < 0.01) and quality of life (28 vs 16; P = 0.02) on the OAB questionnaire. The proportion of urgency urinary incontinence treatment responders (≥50% reduction in episodes) was 79% with RF60 and 31% with RF10. The frequency of device- or procedure-related adverse events was comparable in RF10 versus RF60 groups (14.7% vs 17.2%).
Conclusions: This study demonstrated the feasibility of SBD in alleviating symptoms of refractory OAB. A 60-s RF algorithm using deeper ablations of the sub-trigonal tissues was more effective and comparably safe to a 10-s RF algorithm using more superficial ablations.
Keywords: ablation; afferent nerves; fulguration; micturition; minimally invasive; radiofrequency; trigone.
© 2018 The Authors. Neurourology and Urodynamics Published by Wiley Periodicals, Inc.