The following data are obtained for a 60-year-old male undergoing an exercise (stress) test on an ergometer:

A pulmonary function technologist should

Biological control data are obtained for lung volumes by plethysmography. The following results are obtained:

A pulmonary function technologist should repeat the test instructing the individual to

When using a variable pressure plethysmograph, a leak in the door seal that develops subsequent to calibration will cause underestimation of

Which of the following information reported from a recent methacholine challenge test best summarizes the patient's bronchial hyperresponsiveness?

In a patient with neuromuscular disease, which of the following is the best way to detect airway obstruction?