PFT’s in asthma

The pathophysiology of asthma is characterized by a pattern of lung dysfunction that includes:

The diagnosis of asthma is based upon an appropriate clinical history and characteristic findings from a series of pulmonary function tests. These tests most often include different measures of airflow, bronchodilator responses, lung volumes, and the diffusing capacity.

The detection of airflow limitation in the patient with asthma:

from UpToDate, last updated Spring 2009.