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Related Experiment Videos

Complete external sphincterotomy: correlation between endoscopic observation and the anatomic sphincter.

D G Linker, E A Tanagho

    The Journal of Urology
    |March 1, 1975
    PubMed
    Summary

    This study determined the precise dimensions for cutting external urethral sphincter fibers to improve bladder emptying. A 2 cm length and 6 mm depth incision effectively reduces resistance, potentially eliminating catheter need.

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    Area of Science:

    • Urology
    • Surgical Anatomy

    Background:

    • The external urethral sphincter plays a crucial role in urinary continence and bladder emptying.
    • Understanding the precise anatomy and surgical requirements for incising the external urethral sphincter is vital for effective treatment of bladder outlet obstruction.

    Purpose of the Study:

    • To determine the optimal length and depth of longitudinal cuts required to fully incise the external urethral sphincter fibers.
    • To establish criteria for a surgical procedure that decreases urethral resistance and improves bladder emptying.

    Main Methods:

    • Longitudinal cuts of varying lengths and depths were performed on the external urethral sphincter in 18 male cadavers.
    • The Iglesias resectoscope and Collings knife electrode were utilized for the incisions.
    • Histologic sections of the prostate and urethra were analyzed.

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    Main Results:

    • A precise cut of 2 cm in length, starting from the verumontanum and extending to a depth of 6 mm, was found necessary to completely sever the external urethral sphincter fibers.
    • This specific incision effectively reduces urethral resistance.

    Conclusions:

    • The defined surgical criteria for incising the external urethral sphincter can effectively decrease urethral resistance.
    • This procedure facilitates adequate bladder emptying and may obviate the need for post-operative catheterization.