A 35-year-old healthy male is performing a maximal stress test as part of an annual physical. The following data are observed:

The patient denies any symptoms. Which of the following should a pulmonary function technologist do first?

During the calibration and set-up of the metabolic stress testing system for a patient breathing supplemental oxygen, which of the following gas concentrations will ensure accurate calibration of the system?

Which of the following sets of FIF data is most consistent with an extrathoracic airway obstruction?

While performing a quality control test on an open circuit nitrogen system, the volume of a 3-liter syringe is measured as 3.9
L. Which of the following is the most probable explanation?

During daily quality control procedures on an infrared CO2 analyzer, a pulmonary function technologist is unable to adjust the gain to the calibration gas concentration. Which of the following is the most likely explanation?