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Related Experiment Videos

Pelvic bladder in dogs without urinary incontinence.

M B Mahaffey, J A Barsanti, D L Barber

    Journal of the American Veterinary Medical Association
    |June 15, 1984
    PubMed
    Summary

    This study on dogs found that bladder position within the pelvic canal changed with CO2 infusion, challenging previous links between pelvic bladder position and urinary incontinence. Canine bladder neck shape was also observed.

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    Area of Science:

    • Veterinary Urology
    • Canine Anatomy
    • Diagnostic Imaging

    Background:

    • Previous research suggested a correlation between pelvic urinary bladder position and urinary incontinence in dogs.
    • The precise anatomical and physiological factors influencing bladder position require further investigation.

    Purpose of the Study:

    • To investigate the effect of carbon dioxide (CO2) infusion during double-contrast cystography on the position of the urinary bladder and bladder neck in continent dogs.
    • To evaluate the relationship between bladder neck morphology and position.

    Main Methods:

    • Double-contrast cystography and cystometrography were performed simultaneously in 12 healthy dogs (6 male, 6 female).
    • Radiographs were taken after positive contrast medium infusion and during subsequent CO2 infusion.

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  • Bladder length within the pelvic canal and bladder neck location/shape were assessed on radiographs.

    • Main Results:

    • An average of 34% of bladder length was initially within the pelvic canal.
    • Following CO2 infusion, the bladder neck repositioned cranially in most dogs (5/6 males, 5/6 females).
    • On final radiographs, an average of 19% of bladder length remained within the pelvic canal, and the bladder neck was rounded in 10/12 dogs.

    Conclusions:

    • The study questions previous associations between pelvic urinary bladder position and urinary incontinence.
    • Bladder neck repositioning occurs during cystography with CO2 infusion.
    • Canine bladder neck morphology is typically rounded.