The 51-60 cm H₂O Artificial Urinary Sphincter Pressure Regulating Balloon: Indications and Outcomes

Area of Science:

• Urology
• Medical Devices
• Surgical Outcomes

Background:

• Stress urinary incontinence in men often requires advanced treatment like artificial urinary sphincter (AUS) placement.
• High-risk patients, including those with urethral risk factors, may have unique challenges with AUS device performance and complications.
• The pressure regulating balloon (PRB) is a critical component of the AUS system, influencing its efficacy and safety.

Purpose of the Study:

• To evaluate the role and long-term outcomes of using a specific low-pressure 51-60 cm H2O PRB in male patients undergoing AUS implantation.
• To assess the complication rates, including erosion, infection, and mechanical failure, associated with this low-pressure PRB.
• To identify potential predictors for adverse outcomes in patients receiving the 51-60 cm H2O PRB.

Main Methods:

• A retrospective study included 90 male patients who underwent AUS placement with a 51-60 cm H2O PRB between 2005 and 2021.
• Data collected included patient demographics, indications for PRB use, perioperative details, and postoperative outcomes.
• Statistical analyses, including Pearson's chi-squared and Wilcoxon rank-sum tests, were employed to analyze associations with revisions, erosion, and mechanical failure.

Main Results:

• After a median follow-up of 46.6 months, 4.44% of patients experienced erosion requiring device removal; 4 patients had infections, and 3 required pump relocation.
• One mechanical failure of unknown origin was reported. Thirty patients underwent revision surgery for incontinence, with 3 of 4 erosions linked to urethral risk factors.
• Univariate analysis did not reveal significant associations between cuff erosion, infection, or revision and factors like prior pelvic radiation, age, IPP presence, prior AUS erosion, or urethroplasty.

Conclusions:

• The 51-60 cm H2O PRB is a viable option for high-risk male patients with urinary incontinence, demonstrating low rates of erosion, infection, and mechanical failure.
• While some patients may require subsequent surgery to optimize continence, the low-pressure PRB is recommended as the initial choice for patients with urethral risk factors.
• This approach supports improved safety and efficacy in managing stress urinary incontinence in challenging patient populations.