Question

PFT results: FVC <80% of predicted, FEV1/FVC 90% of predicted, no improvement w/ bronchodilator use

DLCO low most likely the problem?

Answer 1

Based on the PFT results, the problem is likely an obstructive lung disease. The FEV1/FVC ratio falls within the normal range, but the FVC is reduced. The lack of improvement with bronchodilator use suggests no reversibility in the airway obstruction.

Step-by-step explanation:

Based on the provided PFT results, it is likely that the problem is an obstructive lung disease. The FEV1/FVC ratio is 90% of predicted, which falls within the range for normal lung function. However, the FVC is less than 80% of predicted, indicating reduced lung capacity. In obstructive lung diseases, such as asthma or chronic obstructive pulmonary disease (COPD), the airways are narrowed, resulting in difficulty exhaling and reduced FVC. The lack of improvement with bronchodilator use suggests that there is no reversibility in the airway obstruction.

Keywords: PFT results, FVC, FEV1/FVC ratio, obstructive lung disease, bronchodilator use