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Sleep-related respiratory abnormalities and arousal pattern in achondroplasia during early infancy

Mathew Ednick1, Brad T Tinkle, Jungrak Phromchairak

  • 1Department of Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA.

The Journal of Pediatrics
|July 18, 2009
PubMed

Insights

Infants with achondroplasia experience significant sleep-disordered breathing (SDB) and reduced arousal responses during infancy. This SDB is not linked to sleep architecture changes and may increase vulnerability in these infants.

Area of Science:

  • Pediatric Pulmonology
  • Sleep Medicine
  • Medical Genetics

Background:

  • Achondroplasia is a common form of dwarfism.
  • Sleep-disordered breathing (SDB) is a potential complication in infants with achondroplasia.
  • Foramen magnum stenosis is a known feature of achondroplasia.

Purpose of the Study:

  • To assess sleep-disordered breathing (SDB), sleep architecture, and arousal patterns in infants with achondroplasia.
  • To evaluate the relationship between foramen magnum size and SDB severity in these infants.

Main Methods:

  • Retrospective review of polysomnography and medical records from infants with achondroplasia and age-matched controls.
  • Re-scoring of respiratory events, sleep state, and arousals.
  • Review of MRI to assess foramen magnum dimensions and their correlation with SDB.

Main Results:

  • Infants with achondroplasia showed a significantly higher respiratory disturbance index (RDI) compared to controls.
  • A significant decrease in both spontaneous and respiratory arousal indices was observed in infants with achondroplasia.
  • No significant correlation was found between foramen magnum dimensions and SDB severity.

Conclusions:

  • Infants with achondroplasia exhibit significant SDB in early infancy.
  • SDB in this population is not associated with altered sleep architecture, potentially due to attenuated arousal responses.
  • Increased apneic events and decreased arousal response may contribute to infant vulnerability and sudden unexpected death.
Abstract

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