Relationship Between Relative Cerebral Blood Flow, Relative Cerebral Blood Volume, and Relative Cerebral Metabolic Rate of Oxygen in the Preterm Neonatal Brain

Overview

Journal Neurophotonics

Date 2017 Apr 26

PMID 28439520

Citations 10

Authors

Mina Nourhashemi

Guy Kongolo

Mahdi Mahmoudzadeh

Sabrina Goudjil

Fabrice Wallois

Affiliations

Soon will be listed here.

Abstract

The mechanisms responsible for coupling between relative cerebral blood flow (rCBF), relative cerebral blood volume (rCBV), and relative cerebral metabolic rate of oxygen ([Formula: see text]), an important function of the microcirculation in preterm infants, remain unclear. Identification of a causal relationship between rCBF-rCBV and [Formula: see text] in preterms may, therefore, help to elucidate the principles of cortical hemodynamics during development. We simultaneously recorded rCBF and rCBV and estimated [Formula: see text] by two independent acquisition systems: diffuse correlation spectroscopy and near-infrared spectroscopy, respectively, in 10 preterms aged between 28 and 35 weeks of gestational age. Transfer entropy was calculated in order to determine the directionality between rCBF-rCBV and [Formula: see text]. The surrogate method was applied to determine statistical significance. The results show that rCBV and [Formula: see text] have a predominant driving influence on rCBF at the resting state in the preterm neonatal brain. Statistical analysis robustly detected the correct directionality of rCBV on rCBF and [Formula: see text] on rCBF. This study helps to clarify the early organization of the rCBV-rCBF and [Formula: see text] inter-relationship in the immature cortex.

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