Cerebral oxygen metabolism in newborns.

Journal Article (Journal Article)

OBJECTIVE: A better understanding of the developmental changes in brain energy metabolism that occur in human neonates is critically important for designing rational treatment strategies that ensure an adequate supply of nutrients to the brain and minimize deleterious side effects of therapeutic interventions in sick newborns. METHODS: Cerebral metabolic rate for oxygen (CMRO2) was measured with positron emission tomography in 11 sick newborns of different gestational ages. RESULTS: In five preterm infants, mean hemispheric CMRO2 was 0.06 to 0.54 mL 100 g-1 min-1. Two of these preterm infants with virtually absent CMRO2 (0.06 mL 100 g-1 min-1) had minimal or no evidence of parenchymal brain injury detected in the newborn period. In six term infants, mean hemispheric CMRO2 was 0.0 to 1.3 mL 100 g-1 min-1. Two with no neurological disease had mean hemispheric CMRO2 of 0.4 and 0.7 mL 100 g-1 min-1 and were normal at 6 and 7 months, respectively. CONCLUSIONS: CMRO2 in four newborns who had minimal or no detectable brain injury was considerably below the threshold for brain viability in adults of 1.3 mL 100 g-1 min-1. This indicates that energy requirements in fetal and newborn brain are minimal or can be met by nonoxidative metabolism.

Full Text

Duke Authors

Cited Authors

  • Altman, DI; Perlman, JM; Volpe, JJ; Powers, WJ

Published Date

  • July 1993

Published In

Volume / Issue

  • 92 / 1

Start / End Page

  • 99 - 104

PubMed ID

  • 8516092

International Standard Serial Number (ISSN)

  • 0031-4005

Language

  • eng

Conference Location

  • United States