Upper airways obstruction and apnoea in preterm babies

Area of Science:

• Neonatal Physiology
• Respiratory Medicine

Background:

• Preterm infants often exhibit periodic respiration, a breathing pattern characterized by pauses.
• Understanding the mechanisms behind these respiratory events is crucial for neonatal care.

Purpose of the Study:

• To investigate the potential causes of periodic respiration in severely preterm infants.
• To determine the association between upper airway obstruction and apnoic events during periodic respiration.

Main Methods:

• Measurements of tidal flow, volume, and esophageal pressure were collected from 8 preterm infants.
• Flow and tidal volume traces were analyzed to identify cardiac artifacts and the onset of apnea.
• The timing of apnea within the respiratory cycle was examined.

Main Results:

• Analysis indicated that upper airway obstruction was associated with approximately 50% of periodic respiration attacks.
• Cardiac artifacts in flow traces and the point of apnea onset in tidal volume traces were key indicators.
• Glottic closure is hypothesized as the mechanism for upper airway obstruction.

Conclusions:

• Upper airway obstruction is a significant factor in periodic respiration in preterm infants.
• Glottic closure may be the underlying cause of obstruction during these events.
• Further research into neonatal airway dynamics during respiration is warranted.