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Comparison of hydrometry, refractometry, osmometry and Ames N‐Multistix SG in estimation of urinary concentration
Author(s) -
McCROSSIN T.,
ROY L. P.
Publication year - 1985
Publication title -
journal of paediatrics and child health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.631
H-Index - 76
eISSN - 1440-1754
pISSN - 1034-4810
DOI - 10.1111/j.1440-1754.1985.tb02130.x
Subject(s) - refractometry , medicine , urine , osmometer , chromatography , volume (thermodynamics) , urology , chemistry , refractive index , physics , quantum mechanics
The four currently available methods used for estimating urinary concentration were assessed. One hundred and fifty urine specimens were collected and 130 were measured. Twenty were excluded as they contained protein and/or glucose. The volume of 41 samples was inadequate for hydrometry. In urines not containing dissolved macromolecules, hydrometry, refractometry and osmolality reliably reflect the degree of concentration. Except at the extremes, the reagent strip on N‐Multistix SG is not a reliable indicator of specific gravity. In a Children's Hospital, one‐third of urine specimens will be of insufficient volume for standard hydrometry.