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Related Experiment Videos

State-dependent laryngomalacia

M R Amin1, G Isaacson

  • 1Department of Otorhinolaryngology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140, USA.

The Annals of Otology, Rhinology, and Laryngology
|December 31, 1997
PubMed
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This study identifies "state-dependent" laryngomalacia in infants, where stridor appears during sleep due to changes in consciousness affecting laryngeal tissues. Findings support a neurogenic basis for laryngomalacia.

Area of Science:

  • Pediatric Otolaryngology
  • Respiratory Physiology

Background:

  • Infants can exhibit normal breathing when awake but develop stridor during sleep.
  • Laryngoscopy in awake infants may show normal anatomy or mild redundancy without airway obstruction.

Purpose of the Study:

  • To characterize a novel condition termed "state-dependent" laryngomalacia.
  • To investigate the relationship between consciousness level and laryngomalacia presentation.

Main Methods:

  • Flexible laryngoscopy in awake and sedated infants.
  • Observation of breathing patterns and laryngeal dynamics across different states of consciousness.

Main Results:

  • Five infants presented with normal awake breathing and sleep-induced stridor.

Related Experiment Videos

  • Sedation revealed classic laryngomalacia signs, including supraglottic prolapse and inspiratory stridor.
  • Laryngeal findings varied significantly with the infant's level of consciousness.

    • Conclusions:

    • "State-dependent" laryngomalacia is a distinct clinical entity.
    • The dynamic nature of these findings supports a neurogenic etiology for laryngomalacia.
    • Changes in laryngeal tissue behavior correlate with alterations in the level of consciousness.