Interpretation of Pulmonary Function Tests

The obstruction is not reversible in pure emphysema, however, most patients with COPD have some bronchial hyper-reactivity as a component of their overall disease. Although obstruction will dominate in the majority of patients with emphysema, a small subgroup of patients will have an isolated low diffusing capacity with no evidence of obstructive ventilatory defects; in this situation, further ... ................
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