Cerebral, Renal, and Splanchnic Tissue Oxygen Saturation Values in Healthy Term Newborns

Abstract

Objective To determine cerebral regional tissue oxygen saturation (CrSO2), renal regional tissue oxygen saturation (RrSO2), and splanchnic regional tissue oxygen saturation (SrSO2) values in healthy term infants.

Study Design Near-infrared spectroscopy was used to simultaneously measure CrSO2, RrSO2, and SrSO2 continuously for a 1-hour period on the first and second days of life.

Results A total of 41 subjects were monitored out of which complete data were available for 38 subjects. Mean CrSO2 was 78.2  ± 7.9% on first day; 78.3 ± 6.1% on second day (p = 0.95). Mean RrSO2 was 92.1 ± 5.3% on first day; 88.9 ± 5.9% on second day (p < 0.01). Mean SrSO2 was 69.9 ± 12.1% on first day and 75.3 ± 12.4% on second day (p = 0.02).

Conclusion There appears to be consistency in rSO2 values in healthy newborns. CrSO2 was similar on both days. Differences observed in RrSO2 and SrSO2 between days may represent a shift in somatic blood flow distribution taking place during the first day of life.

Keywords

near-infrared spectroscopy - term newborn - tissue oxygenation - neonatal intensive care

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