Reactive Airways Dysfunction Syndrome (RADS)

Does the patient have a history of prior respiratory complaints?

Was the onset of symptoms after a single exposure incident or accident?

Was there an exposure to a gas, smoke, fume or vapor present at high concentrations?

Did the exposing agent have irritant qualities?

Was the onset of symptoms within 24 hours after the exposure?

Time since the exposure

Have symptoms persisted for at least 3 months?

Do symptoms of cough, wheezing, and dyspnea predominate?

Do pulmonary function tests show airflow obstruction?

Is the methacholine challenge test positive?

Have other types of pulmonary diseases have been ruled out?