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Reliability of carnitine concentrations measured in single postprandial urine samples from dogs
S Sanderson1, C Osborne, J Lulich
1Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Minnesota, St Paul 55108, USA.
Objective:
To evaluate the reliability of urine carnitine concentrations measured in single postprandial samples, compared with carnitine concentrations measured in 24-hour urine samples.
Animals:
19 healthy Beagles.
Procedure:
After emptying the urinary bladder by catheterization, dogs were fed a canned canine maintenance diet. Approximately 8 hours later, urine, plasma, and serum samples were obtained for determination of urinary carnitine fractional excretion and urine carnitine-to-creatinine concentration ratio. Results were compared with 24-hour urinary carnitine excretion rate.
Results:
Fractional excretion of carnitine and urine carnitine-to-creatinine ratios correlated poorly with 24-hour urinary carnitine excretion.
Conclusion:
Determination of 24-hour urinary carnitine excretion is recommended to measure urine carnitine concentrations in dogs.