Efficacy of the combination of transcutaneous tibial nerve stimulation and mirabegron in women with overactive bladder in a prospective randomized controlled trial

The management of overactive bladder (OAB) in women encompasses a range of strategies, from behavioral modifications to pharmacotherapy and nerve stimulation techniques. This prospective, randomized, controlled trial evaluates the efficacy of the combination of TTNS and mirabegron in symptom improvement over three months in women diagnosed with OAB. The study was designed as a randomized controlled trial. A total of 40 patients were prospectively randomized into two groups. Twenty patients in the combination group accepted TTNS and mirabegron therapy, and the other 20 patients as control only accepted mirabegron therapy. Primary outcomes were changes from baseline in the lower urinary tract symptoms. The severity of symptoms and quality of life (QoL) were assessed using the validated OAB questionnaire (OAB-q). TTNS reduced the clinical symptoms of OAB, and the difference was statistically significant at all study sites (p < 0.05). Regarding secondary outcomes, the OAB-q symptom bother score was lower in the combination group than in the mirabegron group (p < 0.05). The OAB-q score in the combination group was statistically superior to that in the mirabegron group (p < 0.05). The incidence of complications was not statistically significant between the two groups.The combination of TTNS and mirabegron represents a promising therapeutic strategy for women with overactive bladder, significantly improving symptoms and quality of life with a favorable safety profile. Further research with a larger sample size and long-term follow-up is warranted to confirm these findings and explore the underlying mechanisms of this combination therapy's efficacy.

Efficacy and Safety of Mirabegron Add-on Therapy After Failure With Solifenacin in Multiple Sclerosis Patients With Overactive Bladder: A Pilot Study

OBJECTIVES

Multiple sclerosis (MS) is a chronic neuroinflammatory and neurodegenerative progressive disease of central nervous system that mostly affects young adults. (1) Because of involvement of spinal cord and brain, lower urinary dysfunction symptoms are commonly encountered. MS patients mostly show overactive bladder symptoms like urgency, frequent daytime urination, and urgency incontinence. Among MS patients, antimuscarinic therapy is the first-line treatment with overactive bladder symptoms as well as in general population yet 30% of the patients show insufficient improvement or intolerance to the treatment (2). In our study, our aim is to evaluate the efficacy and safety of mirabegron add-on treatment in MS patients after inadequate response to antimuscarinic monotherapy.

METHODS

University of Kyrenia and Dr Burhan Nalbantoglu State hospital's databases were screened for the study. Seventy patients who were residents diagnosed with MS according to McDonald criteria were questioned. Among these patients, a total of 22 of them were included in the study. Inclusion criteria was at least 3 years of MS diagnosis, score of <6 at Expanded Disability Status Scale, and a score of ≥3 at Overactive Bladder Symptom Score Scale.

RESULTS

Among selected patients, 10 mg solifenacin treatment was daily started and followed for 4 weeks. Mirabegron add-on treatment was initiated to the 11 patient who had inadequate improvement in overactive bladder symptom score. After mirabegron add-on treatment among 11 patient, there was a sufficient improvement in overactive bladder symptom score ( P < 0.008).

CONCLUSIONS

In our study, we have found that antimuscarinic and mirabegron combination causes improved efficacy for overactive bladder in MS population.

Overactive Bladder (OAB) Symptoms in Patients Undergoing Flexible Cystoscopy

OBJECTIVE

The objective is to measure the change in overactive bladder (OAB) symptoms in patients undergoing flexible cystoscopy in the early postoperative period using a validated OAB-V8 tool.

PATIENTS AND METHODS

It was a prospective, cross-sectional, observational study conducted by a section of Urology at the Aga Khan University Hospital, Karachi. The total duration of the study was 12 months (July 2022 to June 2023). All adult patients who underwent flexible cystoscopy under local anesthesia for diagnostic and surveillance purposes were included in the study. OAB symptoms were evaluated using the validated eight-item OAB-V8 tool just before the cystoscopy and on postoperative days 1 and 4. Patients were categorized as either OAB-negative (<8) or OAB-positive (≥8) based on their sum scores. Mean sum scores of different variables and OAB subdomains were assessed.

RESULTS

Sixty-three patients were included in the final analysis with a predominantly male population. The mean pre-cystoscopy (screen) score was 7.46 + 5.58, which increased to 9.89 + 6.82 on day 1 (p<0.01) before decreasing back to 7.68 + 5.7 on day 4 (p=0.08). Twenty-one patients (33.3%) were labeled OAB positive on day 0. Following cystoscopy, this number increased to 32 patients (50.8%) as 11 patients (26.2 %) developed de-novo OAB symptoms. The sub-group analysis showed an insignificant impact of age (p=0.5), gender (p=0.51), indication (p=0.22), and use of alpha-blocker (p= 0.30) on change in OAB score.

CONCLUSION

 OAB symptoms are frequently encountered in patients undergoing awake (flexible) cystoscopy. This procedure can also trigger de novo OAB symptoms, albeit transiently, which typically resolve over time. This information could help in patient counseling, management, and the need for intervention in the future.

Validation of the Croatian Version of the 8-Item Overactive Bladder Questionnaire (OAB-V8)

OBJECTIVES

The present study was conducted with the aim to translate, adapt, and validate the 8-item Overactive Bladder Questionnaire (OAB-V8) in Croatia.

METHODS

This study included a total of 58 female patients with OAB and 66 healthy women. The translation to Croatian followed standardized procedure. All eligible participants completed OAB-V8 at inclusion and 2 weeks after to assess test-retest reliability. Cronbach α coefficient was calculated to assess internal consistency.

RESULTS

Our study demonstrated high internal consistency for all items at both visits (Cronbach α between 0.799 and 0.847), with stable internal consistency reliability across items during the 2-week period. However, the exception is the item "waking up at night to urinate," which significantly changed during the 2-week period. Intraclass correlation for OAB-V8 items ranged from 0.810 to 1.0, with Spearman correlations greater than 0.9 for all items (P < 0.01). There were strong significant correlations between frequency of urination during daytime and uncomfortable and sudden urge to urinate, and between nocturia and waking up at night. Discriminative validity showed statistically significant score differences between patients and the control group.

CONCLUSIONS

The Croatian version of the OAB-V8 was successfully translated, adapted, and validated so the questionnaire is now ready for use as a reliable tool for initial screening and assessing patients with OAB in everyday Croatian clinical practice.