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Related Experiment Videos

Experimental ureteral lengthening in dogs

K K Crooks, J J Daly, G R Prout

    Investigative Urology
    |July 1, 1980
    PubMed
    Summary

    This study shows that dog ureters can be mechanically lengthened using constant external tension. The ureter tissue remained viable after stretching, indicating potential for tissue engineering applications.

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    Area of Science:

    • Urology
    • Biomedical Engineering
    • Tissue Engineering

    Background:

    • Ureteral reconstruction often requires tissue grafts.
    • Maintaining ureter viability during elongation is crucial for surgical success.

    Purpose of the Study:

    • To investigate the feasibility of mechanically elongating canine ureters.
    • To assess the viability and histological changes of stretched ureter segments.

    Main Methods:

    • Canine ureters were surgically divided.
    • Proximal segments were subjected to constant tension (26-30 mm Hg) using springs for 2 weeks.
    • Viability and histological changes (muscular hypertrophy, collagen, elastic tissue, inflammation) were evaluated.

    Main Results:

    • Seven of eight ureter segments elongated, averaging 33% increase in length.
    • Six of the seven elongated segments remained viable.
    • Microscopic analysis revealed muscular hypertrophy, increased collagen and elastic tissue, and periureteral inflammation and edema.

    Conclusions:

    • Canine ureters can be mechanically elongated using constant external tension.
    • Ureter tissue viability can be maintained during mechanical stretching.
    • This technique shows potential for future ureteral reconstruction strategies.

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