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Your journey
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More info
You can access this
clinical trial
if you have
Post Operative Urinary Retention
and you are
over 18
years old
The primary goal of this phase is to monitor the long-term effects.
The treatment is already on the market.
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The purpose

Acute urinary retention is one of the most common complications after surgery and anesthesia. Micturition depends on coordinated actions between the detrusor muscle and the external urethral sphincter. Under the influence of epidural analgesia, patients may not feel the sensation of bladder filling, which can result in urinary retention and bladder overdistension. Overfilling of the bladder can stretch and in some cases permanently damage the detrusor muscle. Because epidural anesthesia can be performed at various levels of the spinal cord, it is possible to block only a portion of the spinal cord (segmental blockade). Thoracic epidural analgesia with bupivacaine significantly inhibits the detrusor muscle during voiding, resulting in clinically relevant post void residuals which required monitoring or transurethral catheterisation. This bladder muscle inhibition is comparable to a motor blockade. The epidural administration of ropivacaine during labour results in a clinically relevant reduction of motor blocks. The hypothesis is that thoracic epidural analgesia with the local anesthetics ropivacaine leads to less significant changes in bladder function than bupivacaine as a control group, in patients undergoing lumbotomy incision for renal surgery.

Provided treatments

  • Drug: Ropivacaine 2mg/ml
  • Drug: Bupivacaine
  • Device: 6 French transurethral dual channel catheter (Gaeltec, Dunvegan, Scotland)
  • Device: 14 French rectal balloon catheter (Gaeltec, Dunvegan, Scotland)
Tris trial is registered with FDA with number: NCT02414373. The sponsor of the trial is University Hospital Inselspital, Berne and it is looking for 42 volunteers for the current phase.
Official trial title:
Effects of Thoracic Epidural Administered Ropivacaine Versus Bupivacaine on Lower Urinary Tract Function: A Randomized, Controlled Study