The following Levy-Jennings charts of control values are obtained:

Which of the following is the correct sequence of actions for a pulmonary function technologist to take?
1. Replace the oxygen electrode.
2. Check the temperature of the measuring chamber.
3. Run protein remover through the blood gas analyzer.
4. Replace the CO2 electrode.

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?

During an exercise study, the RER will equal the RQ only when the patient is at

The following results are obtained from an adult male:

The corrected DLcovalue