Lung diffusion testing

Alternative names:

diffusing capacity

Normal values:

This test is usually reported as the percent of predicted amount of carbon monoxide inhaled that should be absorbed, according to the age, sex, and height of the person.

What abnormal results mean:

Abnormal results generally indicated that gases are not diffused across lung membranes normally. This may indicate that certain lung diseases are present. Some of these diseases are diffuse interstitial fibrosis, sarcoidosis, asbestosis, and emphysema.