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Renal function in the newborn. Newborn creatinine related to birth weight, maturity and maternal creatinine
1Department of Obstetrics and Gynaecology, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin.
The maternal and newborn renal function in 84 normal pregnant women delivering at term was investigated. There was no difference between maternal and newborn plasma concentrations of urea (3.9 +/- 1.0 vs. 3.9 +/- 1.2 mmol/l) and creatinine (65.8 +/- 13.3 vs. 65.3 +/- 11.6 mumols/l). The plasma sodium and potassium concentrations were significantly higher in the newborn (139.6 +/- 4.1 vs. 136.8 +/- 5.1 mmol/l, p less than 0.001, and 5.1 +/- 1.3 vs. 4.2 +/- 0.9 mmol/l, p less than 0.001, respectively). Significant correlations were found between newborn sodium (p less than 0.02) and potassium (p = 0.0001) with maternal potassium concentrations, newborn urea with maternal urea concentrations (p = 0.0001), and newborn creatinine with maternal creatinine concentrations (p = 0.0001), gestation of delivery (p less than 0.05) and birth weight (p = 0.025).
The maternal and newborn renal function in 84 normal pregnant women delivering at term was investigated. There was no difference between maternal and newborn plasma concentrations of urea (3.9 +/- 1.0 vs. 3.9 +/- 1.2 mmol/l) and creatinine (65.8 +/- 13.3 vs. 65.3 +/- 11.6 mumols/l). The plasma sodium and potassium concentrations were significantly higher in the newborn (139.6 +/- 4.1 vs. 136.8 +/- 5.1 mmol/l, p less than 0.001, and 5.1 +/- 1.3 vs. 4.2 +/- 0.9 mmol/l, p less than 0.001, respectively). Significant correlations were found between newborn sodium (p less than 0.02) and potassium (p = 0.0001) with maternal potassium concentrations, newborn urea with maternal urea concentrations (p = 0.0001), and newborn creatinine with maternal creatinine concentrations (p = 0.0001), gestation of delivery (p less than 0.05) and birth weight (p = 0.025).