Repair of an incompetent urethral sphincter in a mare.

The research paper details the successful surgical repair of a damaged urethral sphincter in a mare that was causing urinary incontinence. The damage had occurred during the removal of a cystic urolith and was corrected by connecting the ends of the disrupted urethralis muscle and tunica muscularis.

Introduction

• The study focuses on a specific case of a 7-year-old Swedish Warmblood mare suffering from urinary incontinence due to a ruptured and/or transected urethral sphincter.
• This issue arose as a result of damage caused during the process of removing a cystic urolith – a type of bladder stone that’s common in horses.

Methodology

• The treatment involved surgically repairing the injured urethral sphincter. This step was crucial since the sphincter essentially controls the release of urine from the bladder.
• The repair was executed by apposing, or bringing together, the ends of the respective disrupted urethralis muscle and tunica muscularis. The urethralis muscle is a part of the mammalian urethra while the tunica muscularis is a layer of muscle tissue that forms a part of several organ walls in the body.

Results

• The surgery proved successful as the mare’s issue of urinary incontinence was resolved following the repair.
• This indicates the effectiveness of this surgical technique in the treatment of urinary incontinence resulting from a defective urethral sphincter.

Conclusions

• The research demonstrates that urinary incontinence in horses may be caused by a transected and/or ruptured urethral sphincter.
• The study suggests a definitive treatment solution for this condition – apposition of the ends of the disrupted urethralis muscle and tunica muscularis – which can effectively rectify the incontinence caused by this specific defect.