Reliability of using random urine samples for "spot" determination of fractional excretion of electrolytes in cats

To determine whether the "spot" method of determining fractional excretion (FE) of electrolytes in cats is accurate. 5 clinically normal young adult female cats. Cats were acclimated to metabolism cages, and 2 consecutive 72-hour collections of urine were made to determine FE of total calc...

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Bibliographic Details
Published inAmerican journal of veterinary research Vol. 58; no. 11; p. 1184
Main Authors Finco, D.R. (The University of Georgia, Athens, GA.), Brown, S.A, Barsanti, J.A, Barges, J.W, Cooper, T.A
Format Journal Article
LanguageEnglish
Published United States 01.11.1997
Subjects
ACCURACY
Animals
CALCIO
CALCIUM
Calcium - urine
CATS
Cats - physiology
Cats - urine
CHAT
Circadian Rhythm - physiology
CREATININA
CREATININE
ELECTROLITOS
ELECTROLYTE
ELECTROLYTES
Electrolytes - urine
ERRORS
EXCRECION
EXCRETION
Female
FILTRACION
FILTRATION
FOSFORO
GATO
GLOMERULAR FILTRATION RATE
Kidney - metabolism
Kidney - physiology
MAGNESIO
MAGNESIUM
Magnesium - urine
MEASUREMENT
MEDICION
MESURE
Methods
Models, Biological
ORINA
PHOSPHORE
PHOSPHORUS
Phosphorus - urine
POTASIO
POTASSIUM
Potassium - urine
Reference Values
Reproducibility of Results
SODIO
SODIUM
Sodium - urine
Time Factors
URINE
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Summary:To determine whether the "spot" method of determining fractional excretion (FE) of electrolytes in cats is accurate. 5 clinically normal young adult female cats. Cats were acclimated to metabolism cages, and 2 consecutive 72-hour collections of urine were made to determine FE of total calcium, potassium, total magnesium, sodium, and phosphorus by conventional methods, using endogenous creatinine clearance as an estimate of glomerular filtration rate. During collections, small samples of urine were obtained by cystocentesis at 8 AM, 3 PM, and 9 PM for determination of FE of the electrolytes by use of the "spot" method. Values from "spot" determinations were highly variable, compared with 72-hour values, with a high percentage falling outside the range of mean +/- 2 SD for 72-hour FE values. The "spot" method for determining FE is not precise, and if used, caution and judgement should be exercised in interpretation of the results.
Bibliography:L70
1997052285
L50
ISSN:0002-9645
1943-5681
DOI:10.2460/ajvr.1997.58.11.1184