[Subjective patient satisfaction after injection of botulinum-a toxin in detrusor overactivity]

H Schulte-Baukloh, C Weiss, J Schobert, T Stolze, B Stürzebecher, H H Knispel
Aktuelle Urologie 2005, 36 (3): 230-3

PURPOSE: The established treatment for overactive detrusor function consists of anticholinergic drugs. But this treatment can fail or produce intolerable side effects. We therefore investigated the effect of botulinum-A toxin in treating overactive detrusor function in patients with neurogenic and nonneurogenic bladder dysfunction. We were particularly interested in patient satisfaction with this therapy.

MATERIAL AND METHODS: The subjects were 38 patients who had overactive detrusor function of different origins and in whom therapy with anticholinergic drugs had failed. To measure results, we used urodynamic studies and a questionnaire that consisted of 27 validated questions ("Urogenital Distress Inventory UDI-6", "Symptom Severity Index" and "Symptom Impact Index") as well as a satisfaction questionnaire. We injected 200 - 300 U of botulinum-A toxin (Botox) cystoscopically.

RESULTS: At least 4 weeks after injection, 90 % of the patients reported clear improvement of their voiding situation and 93 % stated that they would undergo this procedure again. The frequency of micturition decreased by 29 % in average, and the increased postvoid residual volume was clinically irrelevant. Patients reported side effects or complications in 6.7 % of cases. The satisfaction scale (0 - 10) averaged 6.9. Urodynamically, reflex volume increased by 85 %, maximal bladder capacity increased by 47 %, and bladder pressure decreased by 33 %.

CONCLUSIONS: Botulinum-A toxin injection into the overactive detrusor muscle seems to be very effective. The effect is not only reflected in urodynamic studies but also in the subjective patient satisfaction.

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