A patient who is about to begin pulmonary function testing is visibly upset and complains to a pulmonary function technologist that she felt a receptionist was rude to her. Which of the following should the technologist do?

A 45-year-old female with sarcoidosis has pulmonary function tests annually. The following data have been recorded:

A pulmonary function technologist should conclude that

The following biologic control measurements are obtained:

Which of the following patterns appears in this plot?

Which of the above patterns illustrates the effect of increasing temperature in the plethysmograph during airways resistance measurement?

Airways resistance and specific conductance tests are requested for a 7-year-old child with asthma. Which of the following techniques is preferred?