Individualizing aminophylline doses in premature infants using bioelectrical impedance: a non-invasive approach.

Abstract:

:The role of bioelectrical impedance (BI) in estimating the pharmacokinetics and, therefore, individualized doses, of aminophylline in preterm infants (gestational age 26-35 weeks) was assessed in a two-phase study. Multiple regression analysis in the first group of neonates (phase I, n = 19) identified resistance, reactance, weight and length as optimal predictors of distribution volume (adjusted R2 = 0.84, coefficient of variation (CV) = 10.17%), and length2/impedance and postconceptual age as predictors of clearance (adjusted R2 = 0.74, CV = 26.73%). Application of these models to an independent group (phase II, n = 20) generated doses which satisfactorily achieved target theophylline loading and steady-state (SS) 'peaks' of 10 micrograms/mL and SS 'troughs' of 7.7 +/- 0.6 micrograms/mL. A better understanding of specific criteria and limitations of the impedance technique in neonates is necessary in order to refine BI measurements.

authors

Sidhu J,Triggs E,Charles B,Tudehope D,Gray P,Cowley D

doi

10.1111/j.1440-1754.1993.tb00462.x

subject

Has Abstract

pub_date

1993-04-01 00:00:00

pages

113-8

issue

2

eissn

1034-4810

issn

1440-1754

journal_volume

29

pub_type

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