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Study on cerebral oxygen saturation in children with sleep-disordered breathing

Yunxiao Wu1,2, Zhifei Xu3, Wentong Ge2

  • 1School of Instrumentation Science and Optoelectronic Engineering, Beihang University, Beijing, China.

Journal of Sleep Research
|October 12, 2024
PubMed

Insights

Cerebral oxygen saturation (rSO2) changes precede peripheral oxygen saturation (SpO2) drops during sleep-disordered breathing events in children. Younger children and non-REM sleep stages show greater rSO2 fluctuations, highlighting the need for attention in this group.

Area of Science:

  • Pediatric Sleep Medicine
  • Neuroscience
  • Respiratory Physiology

Background:

  • Sleep-disordered breathing (SDB) is common in children, potentially affecting cerebral oxygenation.
  • Understanding the relationship between SDB severity, respiratory events, and cerebral oxygen saturation (rSO2) is crucial for pediatric care.
  • Previous research has not fully elucidated the dynamics of rSO2 changes in relation to peripheral oxygen saturation (SpO2) during SDB events in children.

Purpose of the Study:

  • To investigate the association between SDB severity, respiratory event types, SpO2, age, and sleep stage on rSO2 in children.
  • To determine the temporal relationship between changes in rSO2, SpO2, and heart rate (HR) during respiratory events.
  • To identify factors influencing rSO2 fluctuations during SDB in pediatric populations.

Main Methods:

  • A cohort of 70 children (aged 4-14 years) with snoring or mouth breathing underwent polysomnography.
  • Synchronous recordings of SpO2, rSO2, and HR were collected during sleep studies.
  • A mixed-effects model was used to analyze the correlations between physiological parameters and respiratory events.

Main Results:

  • No significant differences in mean or minimum rSO2 were found across primary snoring, mild OSA, and moderate-to-severe OSA groups.
  • Changes in rSO2 and HR preceded fluctuations in SpO2 during all types of respiratory events.
  • Increased rSO2 fluctuations were associated with greater SpO2 drops, longer event duration, younger age, apnea events, and non-REM sleep.

Conclusions:

  • Cerebral oxygenation dynamics (rSO2) are closely linked to respiratory events in children with SDB, with rSO2 changes occurring before SpO2 drops.
  • Younger children experiencing SDB, particularly during non-REM sleep, exhibit greater rSO2 variability, suggesting increased vulnerability.
  • Further research is warranted to explore potential protective effects of REM sleep on rSO2 in pediatric SDB.

Keywords:
cerebral oxygen saturationchildnear‐infrared spectroscopysleep‐disordered breathing

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