Persistent Bladder Pain Syndrome After Failed Intravesical Instillation Therapy
This protocol addresses patients with primary bladder pain syndrome in whom an initial course of intravesical instillation therapy did not achieve adequate reduction in pain severity or improvement in bladder symptom scores at one month, and a next-line intervention is now required.
Clinical scenario
Persistent or recurrent pain perceived in the urinary bladder region, present for at least 3 months, accompanied by at least one additional symptom — pain worsening with bladder filling, increased daytime urinary frequency, or nocturia. No proven infection or other obvious local pathology explains the presentation.
Previous treatment — targets not met
The patient has already completed intravesical instillation therapy — with lidocaine plus sodium bicarbonate, intravesical hyaluronic acid or chondroitin sulphate, or intravesical heparin. The goals of that line — reduction in urinary bladder pain severity and improvement in bladder symptom scores at one month — were not achieved. This protocol is the structured next step.
Next-line approach (overview)
When instillation therapies have failed, this protocol moves to procedural interventions targeting the bladder wall or nerve pathways, with the clinical aim of reducing bladder pain severity and improving functional bladder capacity at three months. The complete evidence-based regimen — including specific procedures, patient selection criteria, and sequencing — is available via the link below.
References
- Primary bladder pain syndrome is the occurrence of persistent or recurrent pain perceived in the urinary bladder region, accompanied by at least one other symptom, such as pain worsening with bladder filling and daytime and/or night-time urinary frequency.
- There is no proven infection or other obvious local pathology.
- Consider submucosal bladder wall and trigonal injection of botulinum toxin type A plus hydrodistension if intravesical instillation therapies have failed.
- Offer neuromodulation before more invasive interventions.
- Pudendal nerve stimulation is superior to sacral neuromodulation for treatment of PBPS.
- Botulinum toxin type A trigonal-only injection seems effective and long-lasting, as 87% of patients reported improvement after three months follow-up.
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