JOURNAL ARTICLE

Therapeutic effects of detrusor botulinum toxin A injection on neurogenic detrusor overactivity in patients with different levels of spinal cord injury and types of detrusor sphincter dyssynergia

C-Y Chen, C-H Liao, H-C Kuo
Spinal Cord 2011, 49 (5): 659-64
21243000

STUDY DESIGN: The study was designed as a single-arm clinical trial.

OBJECTIVES: To investigate the therapeutic effects of detrusor botulinum toxin A (BoNT-A) treatment in patients with different levels of spinal cord injury (SCI) and types of detrusor sphincter dyssynergia (DSD).

SETTING: Patients with chronic suprasacral SCI and neurogenic detrusor overactivity (NDO) were treated with 200-U BoNT-A detrusor injection in a tertiary university hospital in Taiwan.

METHODS: Outcome assessment of urodynamic parameters and therapeutic satisfaction were performed at 3 and 6 months among patients with different demographics, SCI levels and types of DSD. The treatment outcomes were assessed by changes in Urogenital Distress Inventory 6-item short form (UDI-6), quality of life (QoL) index and detrusor pressure at maximum flow rate (Pdet.Qmax).

RESULTS: A total of 38 patients with a mean age of 40.1±12.4 years and median duration of SCI of 10.3 years were enrolled. Satisfactory response was reported in 23 (60%) patients. Significant improvements in the UDI-6 and QoL were reported and significant increases of cystometric bladder capacity and post-void residual were noted in overall patients after treatment. Patients with different clinical demographics and urodynamic parameters had similar treatment outcomes and UDI-6 scores. In 11 patients receiving repeat injections of 300 U of BoNT-A after failure of a previous 200 U injection, the treatment outcomes were not significantly different, except that the PdetQmax at 6 months were higher in the group that received 200 U of BoNT-A.

CONCLUSION: Patients with different SCI levels or DSD types had similar treatment outcomes after detrusor 200 U BoNT-A injections for NDO.

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