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Table 1 Urine output, urine osmolarity (u-osm), free water clearance (C H2O ), urinary AQP2 excretion per minute (u-AQP2), urinary excretion of ENaCγ per minute (u-ENaCγ), urinary sodium excretion (u-Na) and fractional excretion of sodium (FE Na ) during 24-hours urine collection with fluid deprivation (12 PM to 8.00 AM) in a randomised, crossover study of 23 healthy subjects

From: Effect of volume expansion with hypertonic- and isotonic saline and isotonic glucose on sodium and water transport in the principal cells in the kidney

  Examination day: P (ANOVA)
0.9% NaCl 3% NaCl Glucose
Urine Output (ml/24 h) 2306(559) 2120(695) 2281(650) 0.56
u-osm (mosm/24 h) 848(231) 797(207) 833(239) 0.73
C H2O (ml/min) -0.46(0–61) -0.47(0.57) -0.44(0.64) 0.99
u-AQP2 (ng/min) 0.93(0.24) 0.91(0.22) 0.93(0.24) 0.89
u-ENaCγ (pg/min) 405(163) 389(188) 385(164) 0.92
u-Na (mmol/24 h) 124(52) 119(41) 120(56) 0.93
FE Na (%) 0.49(0.15) 0.47(0.13) 0.45(0.18) 0.67
  1. Values are means with SD in brackets. One-way ANOVA was used for comparison between groups.