Correct!
4. There is hyperinflation

There is flattening of the diaphragms. The normal dome of each hemidiaphragm should rise at least 1.5 cm above a line connecting the costophrenic angle posteriorly and sternophrenic angle anteriorly. There is also widening of the retrosternal airspace which should be less than 2.5 cm. Both these findings are consistent with hyperinflation. There are no masses, consolidation or visible bronchi.

Which of the following should be done next? (Click on the correct answer to proceed to the third of five panels)

1. CT scan of the chest
2. Flexible fiberoptic bronchoscopy with bronchoalveolar lavage
3. Pulmonary function testing
4. 1 and 3
5. All of the above

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