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The urethral sphincter: an update

M Gray, R Rayome, K Moore

    Urologic Nursing
    |June 1, 1995
    PubMed
    Summary
    This summary is machine-generated.

    The urethral sphincter acts as a single, adaptable unit for continence and urination. Understanding this mechanism helps clinicians better diagnose and treat urinary incontinence and obstruction.

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    Area of Science:

    • Urology
    • Anatomy
    • Physiology

    Background:

    • Traditional models describe two muscular sphincters for urinary control.
    • These models may oversimplify the complex function of the urethral sphincter.

    Purpose of the Study:

    • To present the urethral sphincter as a single, integrated mechanism.
    • To improve clinical assessment and management of sphincter dysfunction.

    Main Methods:

    • Conceptual review of urethral sphincter anatomy and function.
    • Analysis of physiological roles in continence and micturition.

    Main Results:

    • The urethral sphincter functions as a unified structure.
    • It maintains a watertight seal during bladder filling.

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  • It reshapes to facilitate urine flow during voiding.

    • Conclusions:

    • Abandoning the dual-sphincter concept enhances understanding of urethral function.
    • This revised perspective aids in diagnosing and managing stress urinary incontinence (SUI) and bladder outlet obstruction.