Intradetrusor onabotulinum-a toxin injections in children with therapy-resistant idiopathic detrusor overactivity. A retrospective study

Quality of Life in Female Patients with Overactive Bladder after Botulinum Toxin Treatment

BACKGROUND

Manifestations of OAB can considerably diminish the quality of life. Botulinum toxin has emerged as a valuable treatment option in diseases whose symptoms cannot be controlled adequately with other available therapies. The aim of the present study was to compare the subjective quality of life of patients with OAB before the injection of botulinum toxin and three and six months after the intervention.

METHODS

This study was based on a diagnostic survey with three validated questionnaires, ICIQ-OAB, ICIQ-OABqol, and ICIQ-LUTSqol, and an additional questionnaire developed by the authors to collect sociodemographic characteristics and selected medical data.

RESULTS

This study demonstrated significant differences between pre-treatment scores and those at three and six months post injection. At three and six months after the intervention, mean scores for all three instruments (ICIQ-OAB, ICIQ-OABqol, ICIQ-LUTSqol) were significantly lower than the respective pre-treatment values, implying a significant attenuation of OAB symptoms and their lower impact on the quality of life. However, the severity of OAB symptoms and their impact on the quality of life at six months post intervention were significantly higher than at three months, except for the social interaction domain.

CONCLUSIONS

Botulinum toxin is an effective treatment for OAB.

An evaluation of onobotulinumtoxinA as a therapeutic option for pediatric neurogenic detrusor overactivity

INTRODUCTION

Neurogenic detrusor overactivity (NDO) results in involuntary detrusor contractions during bladder filling or storage risking transmission of pressure to the upper urinary tracts and/or significant incontinence. The goals of bladder management in children with NDO prioritize the preservation of renal function, prevention of UTIs, and optimizing quality of life. First-line measures include intermittent catheterization and anticholinergic medication. However, when conservative measures fail, surgical intervention may be indicated. Historically, the next step was major reconstructive surgery to create a low-pressure urinary reservoir. The introduction of intravesical botulinum neurotoxin A (BoNT/A) for use in children in 2002 offered a less invasive option for management. However, its exact role is still evolving.

AREAS COVERED

This article summarizes the mechanism of action of BoNT/A for management of NDO and evaluates the current literature defining common practice and clinical efficacy in children with NDO. The findings of the recently completed phase III trial for intravesical onabotulinumtoxinA in children are discussed in detail.

EXPERT OPINION

As the first BoNT/A approved for use in children with NDO, onabotulinumtoxinA appears to be a safe and less invasive alternative to major reconstructive surgery. However, data defining appropriate patient selection and its role as a long-term treatment option continue to develop.

Intravesical botulinum-A toxin in children with refractory non-neurogenic overactive bladder

INTRODUCTION

Overactive bladder (OAB) with urinary incontinence poses a potentially significant impact on daily activities and quality of life. OAB can be unresponsive to specific urotherapy and antispasmodic medication. Due to its successful outcomes in the treatment of neurogenic bladder, intravesical botulinum-A toxin (BTX-A) became a possible solution for children refractory to treatment.

OBJECTIVE

To analyse the outcomes of intravesical BTX-A injections on bladder volume and incontinence in children with refractory OAB.

STUDY DESIGN

The charts of children diagnosed with refractory non-neurogenic OAB who underwent BTX-A treatment in our centre since 2011 were retrospectively analysed. The functional bladder volume (FBV) is expressed as a percentage of the expected bladder capacity (EBC) for age. Dependent variables were compared using the Wilcoxon Signed Rank test. A multivariate logistic regression was used to identify predictors of the response on urinary incontinence.

RESULTS

Fifty children (41 boys) with a median age of 9.9 years were included. In the short term, there was a significant increase in FBV after initial BTX-A treatment from a median of 52.9%-70% (p = 0.000). In the short (<6 months) and long term (6-12 months) 72% and 46% showed improvement of continence, respectively. Male gender and small baseline FBV predict a positive outcome on continence in the long term. The most prevalent complications were urinary tract infections occurring in five cases (10%).

DISCUSSION

Although BTX-A injections serve as an effective therapy to increase bladder volume in non-neurogenic OAB children, the outcomes on urinary incontinence are highly variable. This may be a consequence of the multifactorial aspects of this condition. BTX-A will enable children to inhibit their bladder urgency. The effectiveness of post-BTX-A urotherapy training will therefore most probably be higher. We believe that BTX-A injections should be reserved for children refractory to both specific urotherapy and medication. An appropriate population seems to be children with severe OAB symptoms, confirmed detrusor overactivity in urodynamic study and reduced bladder volume.

CONCLUSION

In refractory OAB children, BTX-A injections are safe and effective in enlarging bladder volume and reducing OAB symptoms, particularly in the first six months after injection.