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Apneic preterms and methylxanthines: arousal deficits, sleep fragmentation and suppressed spontaneous movements

M J Hayes1, M R Akilesh, M Fukumizu

  • 1Graduate School of Biomedical Sciences, University of Maine, Orono, ME, USA. Mhayes@maine.edu

Journal of Perinatology : Official Journal of the California Perinatal Association
|September 7, 2007
PubMed

Insights

Chronic methylxanthine treatment in preterm infants with apnea may cause sleep deprivation. This is due to the stimulant effects of methylxanthines on arousal and motor activity, leading to reduced sleep quality.

Area of Science:

  • Neonatal Medicine
  • Sleep Science
  • Pharmacology

Background:

  • Preterm infants with apnea are often treated with methylxanthines.
  • The potential for methylxanthines to disrupt sleep patterns in this vulnerable population requires investigation.

Purpose of the Study:

  • To investigate whether methylxanthine treatment in apneic preterm infants leads to sleep deprivation.
  • To examine the cumulative effects of methylxanthines on arousal and motor activity during sleep.

Main Methods:

  • Sleep, wake, arousal, and actigraphic movements were monitored in 37 extubated, clinically stable premature infants.
  • Infants were grouped based on methylxanthine exposure: caffeine (>5 days), theophylline (>5 days), or no prior exposure.
  • Participants were medication-free for over 72 hours prior to monitoring.

Main Results:

  • Methylxanthine treatment duration correlated with increased arousals, wakefulness, and actigraphic movements, alongside decreased active sleep.
  • Methylxanthine-exposed groups exhibited reduced waking state, fewer wake epochs, fewer brief arousals, and a lower composite arousal index.
  • Sleep-related motility, including fast-burst movements, was shorter in methylxanthine-treated infants compared to controls.

Conclusions:

  • Chronic methylxanthine treatment in apneic preterm infants is associated with sleep deprivation.
  • The stimulatory effects of methylxanthines on arousal and motor systems appear to be the underlying mechanism for sleep disruption.
Abstract

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