A respiratory therapist has just performed a pulmonary function study and notes that the results show obstructive lung disease with a decreased DLCO value. Which of the following is the best interpretation of these results?
A) The patient has pulmonary fibrosis.
B) The patient has asthma.
C) The patient has cystic fibrosis.
D) The patient has emphysema.

Question

Quizplus · Accepted Answer

A decreased DLCO (diffusing capacity of the lungs for carbon monoxide) value in the context of obstructive lung disease is most indicative of emphysema. Emphysema involves damage to the alveoli, reducing the surface area available for gas exchange, which explains the decreased DLCO.

A Respiratory Therapist Has Just Performed a Pulmonary Function Study