Correct!
4. Mild obstruction and restriction
The interpretation of the PFTs is nor straightforward (2). The forced vital capacity (FVC) is normal but the forced expiratory volume in 1 second (FEV1) is slightly reduced. The FEV1 increases only 3% after a bronchodilator with a >12% considered significant reversibility. The total lung capacity if barely normal but the residual volume (RV) is reduced consistent with a mild restriction. The PFTs were interpreted as consistent with mild obstruction and restriction.
The initial chest x-ray is shown in Figure 2.
Figure 2. Patient’s initial chest x-ray.
What is the best interpretation of the patient’s initial chest x-ray? (Click on the correct answer to be directed to the fourth of seven pages)