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Related Experiment Videos

Reversible clinical outcome after sphincter stent removal

M B Chancellor1, D A Rivas, T Watanabe

  • 1Thomas Jefferson University, Philadelphia, Pennsylvania, USA.

The Journal of Urology
|June 1, 1996
PubMed
Summary

The self-expanding urinary sphincter stent offers a reversible treatment for detrusor external sphincter dyssynergia. Removal of the stent, even after prolonged implantation, did not cause lasting damage to the urethra or sphincter function.

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Area of Science:

  • Urology
  • Medical Devices
  • Neourology

Background:

  • Detrusor external sphincter dyssynergia (DESD) causes voiding dysfunction.
  • Conventional external sphincterotomy may lead to permanent lower urinary tract changes.
  • Self-expanding sphincter stents are explored as a reversible alternative for DESD treatment.

Purpose of the Study:

  • To evaluate the reversibility and long-term effects of the self-expanding sphincter stent on the lower urinary tract in patients with DESD.

Main Methods:

  • Four men with spinal cord injuries and DESD underwent video urodynamic studies.
  • They were treated with a self-expanding sphincter stent.
  • The stent was explanted after at least 6 months due to complications or at study end.

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Main Results:

  • All stents were successfully removed without urethral damage.
  • Mean voiding pressure significantly decreased post-stent placement.
  • Post-explantation, voiding pressures returned to baseline, with no new onset of stress urinary incontinence or urethral strictures.

Conclusions:

  • The self-expanding urinary sphincter stent is an effective and reversible treatment for DESD.
  • Stent removal, even after extended periods, preserves urethral integrity and sphincter function.
  • This device presents a safe, temporary solution for managing DESD-related voiding issues.