What test is most useful for the diagnosis of asthma in the symptom-free patient?

Name: What test is most useful for the diagnosis of asthma in the symptom-free patient?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Asthmatics evaluated in a symptom-free period may have a normal chest x-ray examination and normal pulmonary function tests. Under these circumstances, provocative testing can be used to induce airway obstruction. Bronchoprovocation is a well-established method to detect and quantify airway hyperresponsiveness.

What Test Is Most Useful for the Diagnosis of Asthma