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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
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.
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.
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.