Blood transfusion in preterm infants improves intestinal tissue oxygenation without alteration in blood flow

J Banerjee1,2,3, T S Leung4, N Aladangady1,2,5

  • 1Neonatal Unit, Homerton University Hospital NHS Foundation Trust, London, UK.

Vox Sanguinis
|August 11, 2016
PubMed

Insights

Blood transfusions improve intestinal oxygenation in preterm infants by increasing splanchnic tissue oxygenation index (sTOI) and hemoglobin index (sTHI), without altering superior mesenteric artery (SMA) blood flow velocity.

Area of Science:

  • Neonatal Physiology
  • Pediatric Gastroenterology
  • Medical Imaging

Background:

  • Preterm infants often require blood transfusions.
  • Assessing the impact of transfusions on splanchnic circulation is crucial for preterm infant care.
  • Postnatal age may influence the response to transfusion.

Purpose of the Study:

  • To investigate splanchnic blood flow velocity and oximetry in preterm infants undergoing blood transfusion.
  • To analyze these responses in relation to the infant's postnatal age.

Main Methods:

  • Doppler ultrasound measured superior mesenteric artery (SMA) peak systolic velocity (PSV).
  • Near-infrared spectroscopy assessed splanchnic tissue hemoglobin index (sTHI), oxygenation index (sTOI), and fractional tissue oxygen extraction (sFTOE).
  • Infants were grouped by postnatal age: 1-7 days, 8-28 days, and ≥29 days.

Main Results:

  • Pretransfusion SMA PSV varied with postnatal age but did not significantly change post-transfusion.
  • Splanchnic tissue hemoglobin index (sTHI) and oxygenation index (sTOI) increased significantly post-transfusion in all groups (P < 0.01).
  • Fractional tissue oxygen extraction (sFTOE) decreased significantly post-transfusion (P < 0.01).

Conclusions:

  • Preterm infants' baseline splanchnic oximetry and blood flow differ based on postnatal age.
  • Blood transfusion effectively enhances intestinal tissue oxygenation.
  • Mesenteric blood flow velocity remains unchanged post-transfusion, regardless of postnatal age.
Abstract

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