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The Relation of Urine Specific Gravity to Its Composition and Osmolality in the Normal Korean

Yonsei Medical Journal 1961년 2권 1호 p.27 ~ 30
홍윤표, 박춘식, 홍석기,
소속 상세정보
홍윤표 ( Hong Yoon-Pyo ) - 연세대학교 의과대학 비뇨기과학교실
박춘식 ( Park Chun-Sik ) - 연세대학교 의과대학 생리학교실
홍석기 ( Hong Suk-Ki ) - 연세대학교 의과대학 생리학교실

Abstract


A random urine sample was obtained from each of 155 normal Koreans and its specific gravity (S.G.), the total osmolality (Uosm) and the concentration of chloride (UCl) and urea (Uurea) were determined. The Uosm, 2×UCl and Uurea were then plotted as a function of the S. G., and the following regression equations were obtaind: Uosm (in mOsm/kg) = 34,500 (S.G.-1,000), 2×UCl (in mOsm/kg) = 20,000 (S.G. 1,000), and Uurea (in mOsm/kg) = 10,000 (S.G.-1,000). The analysis of these data indicated that 58.5% of the Uosm could be accounted for by NaCl and 28.8% by urea while 41.0% of the S. G. of urine could be accounted for by NaCl and only 14.5% by urea. A comparison of these data with corresponding figures obtained from occidentals suggests that, in the Korean, the contribution of NaCl to both the Uosm and S.G. of urine is considerably higher, while that of urea is significantly lower than that in the occidental. This peculiarity of the urinary composition in Koreans is attributed to their ingestion of a low-protein, high-salt diet.

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