Comparison of a digital and an optical analogue hand-held refractometer for the measurement of canine urine specific gravity

J. K. Paris, A. D. Bennett, S. J. Dodkin, D. A. Gunn-Moore

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Urine specific gravity (USG) is used clinically as a measure of urine concentration, and is routinely assessed by refractometry. A comparison between optical analogue and digital refractometers for evaluation of canine urine has not been reported. The aim of this study was to compare a digital and an optical analogue hand-held refractometer for the measurement of canine USG, and to assess correlation with urine osmolality. Prospective study. Free-catch urine samples were collected from 285 hospitalised adult dogs, and paired USG readings were obtained with a digital and an optical analogue refractometer. In 50 dogs, urine osmolality was also measured using a freezing point depression osmometer. There was a small but statistically significant difference between the two refractometers (P
Original languageEnglish
Pages (from-to)463-U65
JournalVeterinary Record
Volume170
Issue number18
DOIs
Publication statusPublished - 2012

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