| Airway obstruction |
| Classification and external resources |
| MeSH |
D000402 |
Airway obstruction is a respiratory problem caused by increased resistance in the bronchioles (usually from a decreased radius of the bronchioles) that reduces the amount of air inhaled in each breath and the oxygen that reaches the pulmonary arteries. It is different from airway restriction (which prevents air from diffusing into the pulmonary arteries because of some kind of blockage in the lungs).
Diagnosis
Obstruction can be measured using spirometry. A decreased FEV1/VC ratio (versus the normal of about 80%) is indicative of an airway obstruction, as the normal amount of air can no longer be exhaled in the first second of expiration. An airway restriction would not produce a reduced FEV1/VC ratio, would produce a reduced vital capacity. The ventilation is therefore affected leading to a ventilation perfusion mismatch and hypoxia.
See also
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Pathology of respiratory system (J, 460-519), respiratory diseases |
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Upper RT
(including URTIs,
Common cold) |
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Lower RT/lung disease
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Pneumoconiosis ( Asbestosis, Baritosis, Bauxite fibrosis, Berylliosis, Caplan's syndrome, Chalicosis, Coalworker's pneumoconiosis, Siderosis, Silicosis, Byssinosis)
Hypersensitivity pneumonitis ( Bagassosis, Bird fancier's lung, Farmer's lung)
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Other
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Obstructive or
restrictive
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By pathogen
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By vector/route
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By distribution
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Other
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Pleural cavity/
mediastinum |
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| Other/general |
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| respiratory system navs: anat nose,larynx/lower+thoracic cavity/physio/dev, noncongen/congen/tumors, symptoms+signs/eponymous, proc |
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