Artificial Urinary Sphincter Clinical Outcomes (AUSCO)

To evaluate the AMS 800 Artificial Urinary Sphincter (AUS) in men with primary stress urinary incontinence as measured by pad weight tests.

Study Overview

• Status: Completed
• Conditions: Stress Urinary Incontinence
• Intervention / Treatment: Device: AMS 800 Artificial Urinary Sphincter

Detailed Description

Study is designed to evaluate the performance of the AMS 800 Artificial Urinary Sphincter (AUS) in men with primary stress urinary incontinence as measured by pad weight tests.

• Study Type: Observational
• Enrollment (Actual): 145

Contacts and Locations

Study Locations

• Australia
  • New South Wales
    • Concord, New South Wales, Australia, 2139
      • Concord Repatriation General Hospital
  • Victoria
    • Melbourne, Victoria, Australia, 3144
      • Australian Urology Associates
• United States
  • California
    • San Francisco, California, United States, 94110
      • University of California, San Francisco
  • Colorado
    • Aurora, Colorado, United States, 80045
      • University of Colorado Hospital
  • Iowa
    • Iowa City, Iowa, United States, 52242
      • University of Iowa Hospitals and Clinics
  • Kansas
    • Kansas City, Kansas, United States, 66160-7234
      • University of Kansas Hospital
  • Louisiana
    • Bossier City, Louisiana, United States, 71111
      • Willis-Knighton Bossier Medical Center
  • Maryland
    • Baltimore, Maryland, United States, 21287
      • Johns Hopkins Hospital
  • Massachusetts
    • Burlington, Massachusetts, United States, 01805
      • Lahey Clinic Hospital
  • Minnesota
    • Minneapolis, Minnesota, United States, 55455
      • University of Minnesota Medical Center
  • North Carolina
    • Durham, North Carolina, United States, 27710
      • Duke University Medical Center
    • Winston-Salem, North Carolina, United States, 27103
      • Wake Forest University School of Medicine
  • Ohio
    • Cleveland, Ohio, United States, 44195
      • Cleveland Clinic Foundation
  • Tennessee
    • Nashville, Tennessee, United States, 37232
      • Vanderbilt University Medical Center
  • Texas
    • Houston, Texas, United States, 77030
      • MD Anderson Cancer Center
    • Houston, Texas, United States, 77030
      • The Methodist Hospital Research Institute
    • San Antonio, Texas, United States, 78229
      • Urology San Antonio Research, PA.
  • Utah
    • Salt Lake City, Utah, United States, 84132
      • University of Utah

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes

• Sampling Method: Non-Probability Sample

Study Population

This study will enroll adult males with moderate to severe primary stress urinary incontinence (as assessed by a baseline pad weight test) due to ISD who meet the indications for surgical correction of urinary incontinence.

Description

Inclusion Criteria:

1. Male
2. ≥ 18 years of age
3. Has undergone either a radical prostatectomy, transurethral resection of the prostate or other invasive prostate surgery
4. Demonstrates primary stress urinary incontinence
5. Positive screening 24-hour pad weight test (≥100 grams)
6. Experiences at least 3 incontinence episodes per day during baseline diary or presents with continuous incontinence
7. Negative urine culture
8. Willing and able to undergo surgical implantation of the AUS device
9. Willing and able to comply with the follow-up requirements
10. Willing and able to forego any other surgical urinary incontinence treatments while participating in the study
11. Willing and able to sign the informed consent

Exclusion Criteria:

1. Previously had or currently has a device implanted (AUS/Sling, or otherwise) for treatment of SUI or urge incontinence
2. Primary urgency incontinence
3. Postvoid residual volume greater that 150 ml or a history of difficulty emptying the bladder
4. Recurrent vesicourethral anastomotic stricture or urethral stricture disease within the past 6 months
5. Known urogenital malignancy other than previously treated prostate cancer
6. Recurrent prostate cancer that is expected to require intervention during the study follow-up period
7. History of recurrent bladder stones within the past 12 months prior to signing the informed consent
8. Neurogenic bladder
9. Need for intermittent catheterization
10. Known history of bleeding diathesis or coagulopathy
11. Immunosuppressed or on medical therapy which would impact the immune system
12. Uncontrolled diabetes, defined as (HbA1c>10)
13. Has a genitourinary mechanical prosthesis that was implanted within 3 months from the date of consent
14. Had a post-implantation infection associated with the device after genitourinary mechanical prosthesis was implanted
15. Undergone bulking procedure within 6 months of the baseline assessment
16. Poor candidate for surgical procedures and/or anesthesia due to physical or mental conditions
17. Urinary incontinence due to or complicated by an irreversibly obstructed lower urinary tract
18. Irresolvable detrusor hyperreflexia or bladder instability
19. Currently enrolled or plans to enroll in another device or drug clinical trial
20. Currently using an indwelling catheter or condom catheter for treatment of incontinence and is not willing to discontinue use at least 4 weeks prior to baseline assessment
21. Known allergy or sensitivity to rifampin or to minocycline HCl or other tetracyclines (only applicable when implanting with InhibiZone version of this device)
22. Systemic lupus erythematosus because minocycline HCl has been reported to aggravate this condition (only applicable when implanting with InhibiZone version of this device)

Study Plan

How is the study designed?

Design Details

• Observational Models: Cohort
• Time Perspectives: Prospective

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort

Intervention / Treatment

AMS 800 Artificial Urinary Sphincter Recipients; Adult males with moderate to severe primary stress urinary incontinence (as assessed by a baseline pad weight test) due to ISD who meet the indications for surgical correction of urinary incontinence.

Device: AMS 800 Artificial Urinary Sphincter; The AMS 800 Artificial Urinary Sphincter (AUS) is an implantable, fluid filled, solid silicone elastomer device used to treat stress urinary incontinence due to reduced urethral/bladder outlet resistance (intrinsic sphincter deficiency). It is designed to restore the natural process of urinary control. The device simulates normal sphincter function by opening and closing the urethra under the control of the patient.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of Subjects With Reduction in 24 Hour Pad Weight Test at 12 Months	Number of subjects achieving 50% reduction or greater in baseline urinary incontinence as measured by 24-hour pad weight test at 12 months post device activation	12 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Percentage of Participants That Required Revision (Revision Rates), Had Serious Adverse Events, and Had Serious Adverse Events That Are Device and/or Procedure Related	Percentage of Participants that Required Revision (Revision Rates), had Serious Adverse Events, and had Serious Adverse Events that are Device and/or Procedure Related at 3 months, 6 months, and 12 months. Adverse event and revision rates are summarized by the Kaplan-Meier estimate with revision/event timing relative to the index procedure.	3 months, 6 months, and 12 months
Number of Subjects Achieving ≥ 50% Reduction in 24 Hour Pad Weight Test at Device Activation	Number of subjects achieving ≥ 50% reduction in urinary incontinence as measured by 24-hour pad weight test at device activation compared to baseline	Device Activation
Number of Subjects Achieving ≥ 75% Reduction in 24 Hour Pad Weight Test at Device Activation	≥ 75% reduction in urinary incontinence as measured by 24-hour pad weight test at device activation compared to baseline	Device Activation
Change in Number of Pads Per Day at 3 Months	Change in number of pads per day at 3 months compared to baseline. Change was calculated by subtracting the number of pads per day at baseline from the number of pads per day at 3 months.	3 months
Number of Subjects Achieving ≥ 50% Reduction in 24 Hour Pad Weight Test at 6 Months	Number of subjects achieving ≥ 50% reduction in urinary incontinence as measured by 24-hour pad weight test at 6 months post device activation compared to baseline	6 months
Number of Subjects Achieving ≥ 75% Reduction in 24 Hour Pad Weight Test at 6 Months	≥ 75% reduction in urinary incontinence as measured by 24-hour pad weight test at 6 months post device activation compared to baseline	6 months
Number of Subjects Achieving ≥ 75% Reduction in 24 Hour Pad Weight Test at 12 Months	≥ 75% reduction in urinary incontinence as measured by 24-hour pad weight test at 12 months post device activation compared to baseline	12 months
Change in Number of Pads Per Day at 6 Months	Change in number of pads per day at 6 months post-device activation compared to baseline. Change was calculated by subtracting the number of pads per day at baseline from the number of pads per day at 6 months.	6 months
Change in Number of Pads Per Day at 12 Months	Change in number of pads per day at 12 months post-device activation compared to baseline. Change was calculated by subtracting the number of pads per day at baseline from the number of pads per day at 12 months.	12 months

Collaborators and Investigators

• Sponsor: Boston Scientific Corporation
• Investigators: Principal Investigator: Melissa Kaufman, MD, Vanderbilt Urology

Publications and helpful links

General Publications

• Kaufman MR, Wood HM, Terlecki R, Moon D, Myers J, Vanni AJ, Jones L, Broghammer JA, Henry G, Breyer BN, Erickson B, Burnett AL, Johnsen NV, Loong Chan LW, Flynn BJ, Khavari R, Smith TG 3rd, Elliott S, Chaussee EL, Rainbow K, Peterson AC. The Artificial Urinary Sphincter Clinical Outcomes Trial: Primary Results. J Urol. 2025 Dec 2:101097JU0000000000004796. doi: 10.1097/JU.0000000000004796. Online ahead of print.

Study record dates

Study Major Dates

• Study Start (Actual): October 14, 2019
• Primary Completion (Actual): May 13, 2024
• Study Completion (Actual): May 13, 2024

Study Registration Dates

• First Submitted: September 10, 2019
• First Submitted That Met QC Criteria: September 11, 2019
• First Posted (Actual): September 12, 2019

Study Record Updates

• Last Update Posted (Estimated): January 14, 2026
• Last Update Submitted That Met QC Criteria: December 19, 2025
• Last Verified: December 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Urogenital Diseases; Male Urogenital Diseases; Urologic Diseases; Female Urogenital Diseases; Female Urogenital Diseases and Pregnancy Complications; Urination Disorders; Lower Urinary Tract Symptoms; Urological Manifestations; Urinary Incontinence; Pathological Conditions, Signs and Symptoms; Signs and Symptoms; Urinary Incontinence, Stress
• Other Study ID Numbers: U0669

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No