- Chronic Obstructive Pulmonary Disease is a combination of chronic bronchitis and emphysema.
- Is an obstructive disease with increased lung compliance in which expiration is impaired.
- Is characterized by decreased FVC, decreased FEV1, and decreased FEV1/FVC.
- Air that should have been expired is not, leading to air trapping, increased FRC, and a barrel-shaped chest.
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