- A patient with an obstruction will have a decrease in the FVC 1 to FVC ratio.
- When testing the patient, the clinician will do pulmonary function tests both before and after bronchodilator therapy.
- On post treatment, there is usually an increase in the FEV1, which will also increase the ratio of FEV1 to FVC.
- This demonstrates some reversibility of the disease. [4]
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