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Distribution of salicylate between neonatal and maternal serum at diffusion equilibrium

Distribution of salicylate between neonatal and maternal serum at diffusion equilibrium The post‐distributive neonatal: maternal plasma salicylate concentration ratio following salicylate administration to the mother before delivery is appreciably higher than unity. The protein binding of salicylate and the albumin concentration in one such plasma pair were considerably higher in the neonatal than in the maternal plasma. Equilibrium dialysis of neonatal plasma or serum from 6 newborn infants against that of their mothers produced a neonatal: maternal salicylate concentration ratio above unity in alt cases even if the albumin concentration in the neonatal serum did not exceed that in the maternal serum. However, there was a strong correlation between the neonatal: maternal concentration ratios of salicylate and albumin. These observations demonstrate that conclusions concerning the distribution of a drug across the placenta in relation to its plasma protein binding characteristics must be based on the results of binding studies witti plasma or serum from neonates and their mothers, and not from other adult subjects. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Clinical Pharmacology & Therapeutics Wiley

Distribution of salicylate between neonatal and maternal serum at diffusion equilibrium

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References (17)

Publisher
Wiley
Copyright
© American Society for Clinical Pharmacology and Therapeutic
ISSN
0009-9236
eISSN
1532-6535
DOI
10.1002/cpt1975182210
Publisher site
See Article on Publisher Site

Abstract

The post‐distributive neonatal: maternal plasma salicylate concentration ratio following salicylate administration to the mother before delivery is appreciably higher than unity. The protein binding of salicylate and the albumin concentration in one such plasma pair were considerably higher in the neonatal than in the maternal plasma. Equilibrium dialysis of neonatal plasma or serum from 6 newborn infants against that of their mothers produced a neonatal: maternal salicylate concentration ratio above unity in alt cases even if the albumin concentration in the neonatal serum did not exceed that in the maternal serum. However, there was a strong correlation between the neonatal: maternal concentration ratios of salicylate and albumin. These observations demonstrate that conclusions concerning the distribution of a drug across the placenta in relation to its plasma protein binding characteristics must be based on the results of binding studies witti plasma or serum from neonates and their mothers, and not from other adult subjects.

Journal

Clinical Pharmacology & TherapeuticsWiley

Published: Aug 1, 1975

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