NYMC Faculty Publications

DOI

10.1055/s-0038-1660458

Journal Title

American Journal of Perinatology

First Page

1411

Last Page

1418

Document Type

Article

Publication Date

12-1-2018

Department

Pediatrics

Abstract

Objective: Anemia causes blood flow redistribution and altered tissue metabolic behavior to sustain homeostatic oxygen consumption. We hypothesized that anemia severity would correlate with increased regional fractional tissue oxygen extraction among premature neonates.

Study Design: Regional oxygen extraction was calculated using pulse oximetry and near-infrared spectroscopy data among neonates

Results: Twenty-seven neonates with gestational age 27 ± 2 weeks and birth weight 966 ± 181 g underwent 116 hematocrit determinations. Cerebral and flank oxygen extraction inversely correlated with hematocrit (cerebral r = −0.527, p = 0.005; flank r = −0.485, p = 0.01). Increased cerebral oxygen extraction was observed for the lowest three hematocrit quartiles (Q1 0.26 ± 0.08, p = 0.004; Q2 0.24 ± 0.09, p = 0.01; Q3 0.25 ± 0.09, p = 0.03; all compared with Q4 0.18 ± 0.10). Increased flank oxygen extraction occurred for the lowest two quartiles (Q1 0.36 ± 0.12, p < 0.001; Q2 0.35 ± 0.11, p < 0.001; compared with Q4 0.22 ± 0.13). Splanchnic oxygen extraction demonstrated no similar correlations.

Conclusion: Increases in tissue oxygen extraction may indicate early pathophysiologic responses to nascent anemia in premature neonates.

Publisher's Statement

This is the accepted manuscript version of this article. The final publication is available at Thieme via https://doi.org/10.1055/s-0038-1660458

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