Changes in upper airway size during tidal breathing in children with obstructive sleep apnea syndrome.

ABSTRACT:

Unlabelled

We performed respiratory-gated magnetic resonance imaging to evaluate airway dynamics during tidal breathing in 10 children with obstructive sleep apnea syndrome (OSAS; age, 4.3 +/- 2.3 years) and 10 matched control subjects (age, 5.0 +/- 2.0 years). We hypothesized that respiratory cycle fluctuations in upper airway cross-sectional area would be larger in children with OSAS.

Methods

Studies were performed under sedation. Respiratory gating was performed automatically at 10, 30, 50, 70, and 90% of inspiratory and expiratory volume. Airway cross-sectional area was measured at four ascending oropharyngeal levels at each increment of the respiratory cycle.

Results

We noted the following in subjects with OSAS compared with control subjects: (1) a smaller upper

SUBMITTER: Arens R 

PROVIDER: S-EPMC2718463 | biostudies-literature | 2005 Jun

REPOSITORIES: biostudies-literature