A 54-year-old male who smokes presents to the pulmonary laboratory for chronic cough and dyspnea on exertion. PFT and blood gas results show the following:

Which of the following should the pulmonary function technologist recommend?

During exercise, a subject's oxygen consumption increases out of proportion to his cardiac output. This is due to an increase in

A patient has just finished a 6-minute walk test during which she stopped and rested by leaning against a wall several times, while catching her breath. Which of the following should a pulmonary function technologist do?

While reviewing exercise data, a pulmonary function technologist notes that the patient's anaerobic threshold occurred at 35% of the patient's VO2MAX. This indicates the patient has

Pulmonary function tests performed on a patient with tracheal stenosis may demonstrate increased