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Polygraphic findings of 47 cases with respiratory inhibition after crying

Hideki Minowa1, Aya Mima, Yuka Ikeda

  • 1Department of Neonatal Intensive Care Unit, Nara Prefectural NARA Hospital , Nara , Japan.

The Journal of Maternal-Fetal & Neonatal Medicine : the Official Journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians
|October 15, 2013
PubMed

Insights

Respiratory inhibition after crying (RIAC) is observed in healthy infants, leading to repeated, prolonged episodes of low oxygen saturation. This study details the polygraphic findings in these infants.

Area of Science:

  • Neonatal physiology
  • Pediatric respiratory disorders

Background:

  • Respiratory inhibition after crying (RIAC) is a phenomenon observed in infants.
  • Understanding the polygraphic characteristics of RIAC is crucial for accurate diagnosis and management.

Purpose of the Study:

  • To detail the polygraphic findings in infants experiencing respiratory inhibition after crying (RIAC).

Main Methods:

  • Infants with gestational age ≥36 weeks were screened for RIAC using cranial ultrasonography, SpO2 monitoring, and polygraphy.
  • RIAC was defined as central apnea post-crying with SpO2 <60%, followed by irregular respiration and apnea during recovery.
  • Polygraphic data from 47 RIAC cases were analyzed.

Main Results:

  • The frequency of RIAC was 2.1 (1.2-7.0) episodes per 24 hours.
  • The maximum duration of respiratory inhibition was 78.0 (52.6-109.0) seconds.
  • Episodes involved SpO2 <60% for up to 39.0 (9.8-93.2) seconds, with a minimum SpO2 of 53.0% (42.2-58.0%) and minimum heart rate of 103.0 (79.1-127.1) bpm.

Conclusions:

  • Respiratory inhibition after crying (RIAC) occurs in healthy infants.
  • These infants experience recurrent, prolonged periods of hypoxemia during RIAC events.
Abstract

Keywords:
Cranial ultrasonographySpO2 monitoringhypoxemiainfantspolygraphy

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