COPD Pulmonary Function Tests invariably low FEV 1 FVC ratio and FEV 1 FVC may

Copd pulmonary function tests invariably low fev 1

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COPD- Pulmonary Function Tests invariably low FEV 1 /FVC ratio and FEV 1 FVC may be normal, reduced in advanced cases lung volumes normal or TLC (hyperinflation) normal or FRC normal or RV (gas trapping) Diffusion Capacity (DLCO)- typically reduced blood gases may show hypoxemia and hypercapnia
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FEV 1 FVC Spirometry
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West JB: Pulmonary Pathophysiology. Philadelphia, Wolters Kluwer, 7 th ed, 2008:52 Mechanisms of Airflow Obstruction in COPD Secretions in Airway Lumen Thickening of Airway Walls Loss of Tethering by Parenchyma
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Static Lung Volumes Hyperinflation is found in emphysema
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