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Prematurity and postnatal alterations in intermittent hypoxaemia

Juliann M Di Fiore1, Vidhi Shah2, Abhijit Patwardhan3

  • 1Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio, USA.

Archives of Disease in Childhood. Fetal and Neonatal Edition
|February 18, 2021
PubMed

Insights

Extremely preterm infants experience more frequent and longer intermittent hypoxaemia (IH) events. However, IH duration decreases similarly in very and moderately preterm infants postnatally.

Area of Science:

  • Neonatal Medicine
  • Pediatric Pulmonology
  • Respiratory Physiology

Background:

  • Intermittent hypoxaemia (IH) is common in extremely preterm infants (<28 weeks gestation).
  • Patterns of IH in more mature preterm infants (28-<34 weeks gestation) are less understood.
  • Gestational age is a key factor influencing neonatal respiratory outcomes.

Purpose of the Study:

  • To characterize early postnatal intermittent hypoxaemia (IH) patterns.
  • To investigate the effect of gestational age on IH frequency, duration, and severity.
  • To compare IH progression across different preterm infant groups.

Main Methods:

  • Retrospective analysis of respiratory monitoring data.
  • Categorization of infants into extremely preterm (<28 weeks), very preterm (28-<32 weeks), and moderately preterm (32-<34 weeks) groups.
  • Quantification of IH event frequency, duration, and time spent in hypoxaemia.

Main Results:

  • Extremely preterm infants exhibited significantly higher IH event frequency and longer durations compared to very and moderately preterm infants.
  • The postnatal decrease in IH event duration was comparable between very and moderately preterm infants.
  • Infants born at earlier gestational ages experienced more prolonged periods of hypoxaemia.

Conclusions:

  • Gestational age significantly influences the patterns and severity of early postnatal intermittent hypoxaemia.
  • While extremely preterm infants face greater IH challenges, more mature preterm infants show similar IH resolution trajectories.
  • Understanding these patterns aids in managing clinical expectations for IH in preterm neonates.

Keywords:
health services researchneonatology

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