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Clinical utility of urine specific gravity, electrical conductivity, and color as on-farm methods for evaluating urine concentration in dairy cattle.


ABSTRACT: BACKGROUND:Urine concentration (UC) provides clinically useful information concerning hydration status and renal function of animals. OBJECTIVES:To characterize the clinical performance of urine specific gravity measured by optical refractometry (USG-R ) or Multistix-SG urine reagent dipstick (USG-D ), urine electrical conductivity using an OAKTON Con 6 conductivity handheld meter (UEC ), urine color (UColor ) using a custom-designed 8-point color chart, and urine creatinine concentration (UCreat ) for assessing UC in dairy cattle. ANIMALS:20 periparturient Holstein-Friesian cows. METHODS:Urine was obtained by perineal stimulation or urethral catheterization and urine osmolality (UOsm , reference method), USG-R , USG-D , UEC , UColor , and UCreat determined. Diagnostic test performance was evaluated using Spearman's rho and logistic regression to determine the area under the receiver operating curve (AUC) and optimal cut point for diagnosing hypohydration (UOsm ?800?mOsm/kg). P?

SUBMITTER: Megahed AA 

PROVIDER: S-EPMC6524117 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature

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Clinical utility of urine specific gravity, electrical conductivity, and color as on-farm methods for evaluating urine concentration in dairy cattle.

Megahed Ameer A AA   Grünberg Walter W   Constable Peter D PD  

Journal of veterinary internal medicine 20190425 3


<h4>Background</h4>Urine concentration (UC) provides clinically useful information concerning hydration status and renal function of animals.<h4>Objectives</h4>To characterize the clinical performance of urine specific gravity measured by optical refractometry (U<sub>SG-R</sub> ) or Multistix-SG urine reagent dipstick (U<sub>SG-D</sub> ), urine electrical conductivity using an OAKTON Con 6 conductivity handheld meter (U<sub>EC</sub> ), urine color (U<sub>Color</sub> ) using a custom-designed 8-p  ...[more]

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