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Epidemiology of apnea and bradycardia resolution in premature infants

Scott A Lorch1, Lakshmi Srinivasan, Gabriel J Escobar

  • 1Division of Neonatology, Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA. lorch@email.chop.edu

Pediatrics
|July 13, 2011
PubMed

Insights

Premature infants’ risk of apnea or bradycardia recurrence varies by gestational age and last event timing. This study quantines these risks to improve respiratory control assessment in neonates.

Area of Science:

  • Neonatal Medicine
  • Pediatric Pulmonology
  • Epidemiology

Background:

  • Limited epidemiologic data exists on respiratory control maturation in premature infants.
  • Understanding apnea and bradycardia recurrence is crucial for neonatal care.

Purpose of the Study:

  • To quantify the success rate of apnea- or bradycardia-free intervals in premature infants.
  • To assess the impact of gestational age, postmenstrual age, and event severity on recurrence risk.

Main Methods:

  • Retrospective cohort study of 1403 infants born at ≤34 weeks gestational age.
  • Calculated success rates for various apnea- or bradycardia-free intervals.
  • Stratified analysis by gestational age, postmenstrual age of last event, and event severity.

Main Results:

  • 84.2% of infants were apnea-free and 78.5% bradycardia-free before discharge.
  • A 7-day apnea- or bradycardia-free interval achieved a 95% success rate for the cohort.
  • Infants with gestational age ≤30 weeks or last event >36 weeks postmenstrual age had lower success rates.

Conclusions:

  • Recurrence risk for apnea and bradycardia is significantly influenced by infant's gestational age.
  • The postmenstrual age at the time of the last recorded event is a key factor in predicting future events.
  • These findings aid in assessing respiratory control maturation and discharge readiness in premature infants.
Abstract

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