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Objective   This study aimed to compare the therapeutic effect of intravesical instillation hyaluronic acid with intradetrusor botulinum toxin A (BTX-A) injection or cystoscopic hydrodistention for ketamine-associated cystitis.Methods   Thirty-six patients were evenly randomly divided into the BTX-A group or the hydrodistention group. Patients received 200 U BTX-A detrusor injections in the BTX-A group and cystoscopic hydrodistention in the hydrodistention group. Intravesical instillation of hyaluronic acid was administrated in both groups for eight times. Patients with involuntary detrusor contraction were divided into the persistent involuntary detrusor contraction group and resolved involuntary detrusor contraction group after treatment in 6 months. The predictors of persistent involuntary detrusor contraction were analyzed.Results   Twelve months after treatment, the daytime frequency, Interstitial Cystitis Symptom Index, maximal capacity, and maximal cystometric capacity in the BTX-A group were significantly better than those in the hydrodistention group. Patients with resolution of involuntary detrusor contraction had a significantly shorter duration of ketamine, lower amount of fibrosis in pathology, and higher maximal capacity than those with persistent involuntary detrusor contraction 6 months after therapy.Conclusion   Intravesical instillation of hyaluronic acid with intradetrusor BTX-A injection appears to be a preferable option for long-term effectiveness compared with cystoscopic hydrodistention.

journal of international medical research

Comparison of intravesical instillation of hyaluronic acid with intradetrusor botulinum toxin A injection or cystoscopic hydrodistention for ketamine-associated cystitis