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Related Experiment Videos

Surgical results with artificial urinary sphincter

T R Malloy, A J Wein, V L Carpiniello

    Urology
    |June 1, 1982
    PubMed
    Summary

    The AMS 721 artificial urinary sphincter had an 82% failure rate due to erosion, infection, or mechanical issues. The revised AMS AS 742 model showed improved success in 60% of patients, with fewer complications.

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    Area of Science:

    • Urology
    • Biomedical Engineering

    Background:

    • Artificial urinary sphincters are used to treat urinary incontinence.
    • Early models of artificial urinary sphincters have demonstrated varying success rates and complication profiles.

    Purpose of the Study:

    • To evaluate the long-term outcomes and complications of the AMS 721 and the revised AMS AS 742 artificial urinary sphincter models.
    • To identify factors contributing to device failure and patient outcomes.

    Main Methods:

    • Retrospective review of patients who received AMS 721 (n=11) and AMS AS 742 (n=15) artificial urinary sphincters.
    • Analysis of success rates, defined as long-term continence, and complication rates, including urethral erosion, infection, and mechanical failure.

    Main Results:

    • The AMS 721 model had a high failure rate (82%), with urethral erosions, infection, and mechanical failures being the primary reasons for removal.
    • The revised AMS AS 742 model demonstrated improved long-term continence in 60% of patients, although urethral erosion (27%) and infection (13%) remained significant complications.

    Conclusions:

    • Early artificial urinary sphincter models, such as the AMS 721, had significant limitations and high failure rates.
    • The revised AMS AS 742 model showed some improvement but still presented challenges with complications.
    • An improved surgical technique involving delayed activation is proposed to potentially enhance future outcomes.

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