At maximum exercise, a 24-year-old patient's heart rate is 150/min with a VO2 of 750 mUmin. The calculated
02 pulse is most consistent with which of the following?

A pulmonary function technologist is performing a single-breath diffusion capacity (DLCO) test. Which of the following factors is most likely to cause a falsely elevated DLCO result?

A pulmonary function technologist is performing an exercise study on a patient with sarcoidosis. Which of the following end-tidal CO2 values should the technologist expect at rest, if the test is performed appropriately?

The following data are observed during an exercise test:

Which of the following should a pulmonary function technologist do?

Which of the following tracings represents an airways resistance maneuver performed with a slow breathing frequency?