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[Pulmonary function and the pathogenesis of obstructive sleep apnea syndrome]
1First Department of Internal Medicine, Asahikawa Medical College, Japan.
Nihon Kyobu Shikkan Gakkai Zasshi
|November 1, 1995
Summary
Low lung volumes and airway closure contribute to sleep-induced respiratory disorders in men with obstructive sleep apnea syndrome (OSAS), irrespective of body mass index.
Area of Science:
- Pulmonary Medicine
- Sleep Medicine
- Respiratory Physiology
Context:
- Obstructive sleep apnea syndrome (OSAS) affects breathing during sleep.
- Pulmonary function tests (PFTs) assess lung health.
- Understanding the link between PFTs and OSAS complications is crucial.
Purpose:
- To investigate the relationship between pulmonary function test results and sleep-induced respiratory disorders in men with OSAS.
- To determine if lung volumes and airway function correlate with OSAS severity.
Summary:
- Pulmonary function tests were conducted on men with and without OSAS in both sitting and supine positions.
- No significant differences in PFTs were observed between groups.
- However, reduced lung volumes (TLC, FRC) and increased closing capacity (CC/FRC) were noted in the supine position for all participants.
- CC/FRC positively correlated with apnea index and 4% desaturation time, indicating a link to respiratory disturbance severity.
- Body mass index did not correlate with OSAS severity.
Impact:
- Findings suggest that reduced lung volumes and peripheral airway closure are key contributors to sleep-disordered breathing in men with OSAS.
- These factors play a role regardless of body mass index.
- Highlights the importance of considering lung mechanics in the management of OSAS.