During an exercise study, a pulmonary function technologist notices the systolic blood pressure increased to
270 mm Hg using an automated cuff. Which of the following should the technologist do?

During daily quality control procedures on an infrared CO2analyzer, a pulmonary function technologist is unable to adjust the gain to the calibration gas concentration. Which of the following is the most likely explanation?

Results of two blood gas samples drawn from the same patient, 30 minutes apart, are shown below:

Which of the following is the most likely explanation for these differences?

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 results are obtained:

The RV/TLC ratio from these data is consistent with which of the following?