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Related Experiment Videos

Distribution of current during transurethral resection.

L Kay, H B Nielsen

    Scandinavian Journal of Urology and Nephrology
    |January 1, 1985
    PubMed
    Summary
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    An earthing lead for transurethral resection (TUR) devices captures 45% of current, but an insulated sheath is the best protection against heat-related urethral stricture for patients and surgeons.

    Area of Science:

    • Urology
    • Medical Device Engineering
    • Surgical Safety

    Background:

    • Transurethral resection (TUR) involves high-frequency current, posing risks to surgeons.
    • An earthing lead on the resectoscope sheath is a recommended safety measure.
    • Current leakage can cause heat, potentially leading to secondary urethral stricture.

    Purpose of the Study:

    • To evaluate the effectiveness of an earthing lead in capturing high-frequency current during prostatic TUR.
    • To assess the influence of bleeding on current return through the earthing lead.
    • To determine the optimal method for preventing current leakage and associated complications.

    Main Methods:

    • In vivo measurements of high-frequency current return during prostatic TUR.
    • In vitro testing to assess the impact of bleeding on earthing lead performance.

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    Main Results:

    • Approximately 45% of high-frequency current returned to earth via the earthing lead during in vivo prostatic TUR.
    • In vitro tests indicated that bleeding had minimal effect on the current returning through the earthing lead.

    Conclusions:

    • While an earthing lead offers some protection, it does not capture all current.
    • An insulated sheath is the most effective safeguard for both patients and surgeons against current leakage and potential thermal injury during TUR.