• J. Matern. Fetal. Neonatal. Med. · Apr 2011

    Noninvasive evaluation of splanchnic tissue oxygenation using near-infrared spectroscopy in preterm neonates.

    • Josef Cortez, Meenakshi Gupta, Arun Amaram, Janet Pizzino, Megha Sawhney, and Beena G Sood.
    • Division of Neonatal-Perinatal Medicine,Wayne State University and Children's Hospital of Michigan, Detroit, Michigan 48201, USA.
    • J. Matern. Fetal. Neonatal. Med. 2011 Apr 1;24(4):574-82.

    BackgroundDiagnosis of necrotizing enterocolitis (NEC) in preterm neonates is challenging. We hypothesized that regional splanchnic oxygen saturation (rsSO₂) measured by near-infrared spectroscopy (NIRS) is a biomarker for mesenteric perfusion.ObjectiveTo evaluate feasibility and safety of continuous rsSO₂ monitoring in preterm infants in the first 14 days of life.MethodsPreterm neonates ≤30 weeks' gestation had a NIRS sensor placed in the left paraumbilical region within 48 h of birth. rsSO₂ was recorded every 30 s. Clinical data including pulse oximetry (SaO₂) were recorded. Fractional tissue oxygen extraction (FTOE) was computed as follows: (SaO₂ - rsSO₂) × 100/SaO₂.ResultsOf 21 infants enrolled, 2 were excluded because of skin breakdown and missing data. Daily mean rsSO₂ values decreased over the first 9 days (p < 0.0001) followed by an increase from day 10 (D10) to D14 (p = 0.0061). rsSO(2) was lower and FTOE was higher in infants with feeding intolerance compared to those without feeding intolerance (p = 0.0043). rsSO₂ accounted for ≥99.5% of the variance in FTOE. Two neonates with NEC had persistently low rsSO₂ with loss of variability preceded or followed by very high rsSO₂.ConclusionsWe have reported feasibility, safety and ranges for rsSO₂ for a small number of preterm infants in the first 2 weeks of life.

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