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Bioelectrical impedance vector (BIVA) reference values for healthy term newborns 1-2 days old
Nallely Bueno-Hernández1, Jesús Carlos Briones-Garduño2, Miguel Ángel Fonseca-Sánchez1
1Laboratorio de Proteómica e Inmunometabolismo, Hospital General de México "Dr. Eduardo Liceaga", Mexico City 06720, Mexico.
Clinical Nutrition ESPEN
|February 16, 2025
Summary
Bioelectrical impedance vector analysis (BIVA) reference values for newborns were established. Significant differences were found compared to other populations, potentially due to ethnicity or BIVA assessment techniques.
Area of Science:
- Physiology
- Biomedical Engineering
Background:
- Bioelectrical impedance vector analysis (BIVA) assesses body fluids and nutritional status using reference ellipses.
- Population-specific BIVA ellipses are influenced by ethnicity, BMI, sex, and age.
Purpose of the Study:
- To establish BIVA reference values for healthy, term newborns aged 1-2 days.
- To compare these values with previously reported newborn populations.
Main Methods:
- A cross-sectional study collected bioelectrical impedance data from healthy, term newborns within 48 hours of birth.
- Mean impedance vector tolerance ellipses (50%, 75%, 95%) were constructed.
Main Results:
- Significant differences in mean impedance vectors were observed between populations.
- Similarities were found only with one of the four previously reported populations.
- No differences were linked to mode of delivery or newborn sex.
Conclusions:
- BIVA reference ellipses for healthy term newborns (1-2 days) were successfully constructed.
- Observed differences suggest ethnic influences or variations in BIA assessment techniques impact BIVA ellipses in newborns.
