Reference values for whole body and cerebral multi-frequency bio-impedance data in neonates less than 12 h postpartum

Healy, G. N. and Lingwood, B. E. (2006) Reference values for whole body and cerebral multi-frequency bio-impedance data in neonates less than 12 h postpartum. Physiological Measurement, 27 11: 1177-1186. doi:10.1088/0967-3334/27/11/010


Author Healy, G. N.
Lingwood, B. E.
Title Reference values for whole body and cerebral multi-frequency bio-impedance data in neonates less than 12 h postpartum
Journal name Physiological Measurement   Check publisher's open access policy
ISSN 0967-3334
Publication date 2006-01-01
Sub-type Article (original research)
DOI 10.1088/0967-3334/27/11/010
Open Access Status Not Open Access
Volume 27
Issue 11
Start page 1177
End page 1186
Total pages 10
Editor M. H. Neuman
Place of publication Bristol, U.K.
Publisher Institute of Physics Publishing
Language eng
Subject C1
321019 Paediatrics
730104 Nervous system and disorders
Abstract Multiple frequency bio-electrical impedance analysis (MFBIA) may be useful for monitoring fluid balance in newborn infants or to provide early prediction of the outcome following perinatal asphyxia. A reference range of data is needed for identification of babies with abnormal impedance values. This was a cross-sectional observational study in 84 term and near-term healthy neonates less than 12 h postpartum. Whole body and cerebral MFBIA measurements were performed at the bedside in the post-natal ward. Gestational age, post-natal age, gender, birthweight, head circumference and foot length measures were recorded. Reference values for impedance at the characteristic frequency (Z(C)) and resistance at zero frequency (R-0) are reported for whole body and cerebral impedance. Significant correlations (p < 0.05) were observed between whole body impedance and birthweight, footlength and head circumference. Females had a significantly higher whole body R0 than males. Cerebral impedance did not correlate significantly with any of the demographic measures and therewere no gender differences observed for cerebral impedance. The reference range for whole body multi-frequency bio-impedance values in term and near-term infants within the first 12 h postpartum can be calculated from the footlength (FL) using the following equations: Z(C) = (942.9 - 4.818* FL) +/- 124.6 Omega; R-0 = (1042 - 4.520(*)FL) +/- 135.5 Omega. For cerebral impedance the reference range is 29.5-48.7 Omega for Z(C) and 33.7-58.0 Omega for R-0.
Keyword Multi-frequency Bio-impedance
Neonate
Whole Body
Cerebral
Biophysics
Engineering, Biomedical
Physiology
Bioelectrical-impedance Analysis
Transcephalic Impedance
Water
Prediction
Volumes
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 19:09:56 EST