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Renal dysfunction in dogs with pyometra.

E A Stone1, M P Littman, J L Robertson

  • 1Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia 19104.

Journal of the American Veterinary Medical Association
|August 15, 1988
PubMed
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Pyometra in dogs often causes kidney dysfunction, including reduced glomerular filtration rate and mild tubulointerstitial nephritis, even without azotemia. Early detection of renal changes is crucial for managing canine pyometra.

Area of Science:

  • Veterinary Medicine
  • Nephrology
  • Canine Health

Background:

  • Pyometra is a common uterine infection in intact female dogs.
  • Renal dysfunction can occur secondary to pyometra, impacting canine health.
  • Understanding these renal changes is vital for effective treatment and prognosis.

Purpose of the Study:

  • To investigate renal function and pathologic changes in dogs with pyometra.
  • To correlate clinical findings with histopathologic renal alterations.
  • To identify specific renal abnormalities associated with pyometra.

Main Methods:

  • Evaluated 27 dogs with pyometra using complete blood count, serum biochemistry, urinalysis, and bacteriologic cultures.
  • Assessed renal morphologic features and performed light, electron, and immunofluorescence microscopy on renal tissues.

Related Experiment Videos

  • Measured 24-hour creatinine clearance, protein excretion, Na excretion, and urine volume in 12 non-azotemic dogs.

    • Main Results:

    • 26% of dogs were azotemic; 89% had urine specific gravity < 1.035.
    • Reduced glomerular filtration rate (GFR) in 75% of non-azotemic dogs; no proteinuria.
    • Mild tubulointerstitial nephritis was common; glomerular lesions were rare. Escherichia coli and Klebsiella were common uterine isolates.

    Conclusions:

    • Pyometra frequently causes renal functional impairment, including reduced GFR, often without significant structural glomerular damage.
    • Mild tubulointerstitial nephritis is a common finding, suggesting a functional rather than purely structural renal insult.
    • Low urine specific gravity and reduced GFR indicate significant renal compromise in dogs with pyometra.