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A prosthetic vas deferens

E E Brueschke, J H Maness, L J Zaneveld

    Biomedical Engineering
    |September 1, 1976
    PubMed
    Summary
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    Researchers developed a reversible synthetic vas deferens device to restore fertility after vasectomy. Implantation in dogs successfully restored sperm transport, showing excellent potential for human applications in reversible male contraception.

    Area of Science:

    • Urology
    • Reproductive Medicine
    • Biomaterials Science

    Background:

    • Vasectomy is a common form of male sterilization.
    • Reversal of vasectomy can be challenging, with varying success rates.
    • A need exists for effective, reversible methods of male contraception and fertility restoration.

    Purpose of the Study:

    • To evaluate a novel synthetic vas deferens device for reversible occlusion.
    • To assess the impact of device length and duration of aspermia on sperm parameters.
    • To determine the efficacy of the prosthetic vas deferens in restoring sperm transport post-vasectomy.

    Main Methods:

    • Six dogs underwent bilateral vasectomy and implantation of synthetic vas deferens devices of varying lengths.
    • The device is constructed from silicone rubber with Dacron velour for tissue ingrowth.

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  • Semen analysis was performed weekly to monitor sperm count and motility.

    • Main Results:

    • Sperm reappeared in the ejaculate of all six dogs post-implantation.
    • The synthetic vas deferens device facilitated the restoration of sperm transport.
    • The device design, including flexible pilot tubes, ensured proper alignment and prevented vas perforation.

    Conclusions:

    • The synthetic vas deferens device effectively restores sperm transport after vasectomy in dogs.
    • This prosthetic device demonstrates excellent potential for reversible male fertility restoration in humans.
    • Further research into device length and duration of aspermia may optimize outcomes.