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Related Experiment Video

Updated: Aug 27, 2025

Non-invasive Optical Measurement of Cerebral Metabolism and Hemodynamics in Infants
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Quantitative and Qualitative Changes in Peripheral Chemoreceptor Activity in Preterm Infants.

Daniel M Mammel1, John L Carroll2, Barbara B Warner1

  • 1Division of Newborn Medicine and.

American Journal of Respiratory and Critical Care Medicine
|September 29, 2022
PubMed
Summary

Preterm infants show higher peripheral chemoreceptor contribution to breathing early on. This activity decreases with postmenstrual age, with apnea being a common response in early assessments.

Keywords:
hyperoxic testpreterm infantsleep-disordered breathingventilatory control

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Area of Science:

  • Neonatal physiology
  • Respiratory control
  • Developmental pediatrics

Background:

  • Preterm infants often experience ventilatory control instability.
  • Peripheral chemoreceptors play a crucial role in regulating breathing.
  • The developmental trajectory of peripheral chemoreceptor contribution in preterm infants remains unclear.

Purpose of the Study:

  • To quantify peripheral chemoreceptor activity in preterm infants.
  • To assess changes in this activity between 32 and 52 weeks postmenstrual age.
  • To correlate activity with ventilatory responses like apnea.

Main Methods:

  • Fifty-five preterm infants (24-28 weeks gestation) were studied.
  • Hyperoxic testing was performed at multiple time points up to 52 weeks postmenstrual age.
  • Quantitative (VCO2 decrease) and qualitative (apnea, breathing changes) responses were analyzed.

Main Results:

  • Peripheral chemoreceptor contribution was significantly higher at 32 weeks (85.2%) compared to 52 weeks (64.1%).
  • Apneic responses to hyperoxia were more frequent at earlier postmenstrual ages.
  • A total of 280 hyperoxic tests were analyzed.

Conclusions:

  • Peripheral chemoreceptor contribution to ventilatory drive is greater in preterm infants at earlier postmenstrual ages.
  • High peripheral chemoreceptor activity, indicated by frequent apnea, is observed early on.
  • Understanding these changes may elucidate links between early respiratory control and later sleep-disordered breathing.