ABSTRACT
Bronchoprovocation testing, or bronchial challenges, are used to identify airway hyperresponsiveness (AHR) in order to help support or call into question a diagnosis of asthma. AHR, also known as bronchial hyperresponsiveness, is a state of heightened bronchoconstrictive response to airway stimuli.1 Although AHR is a hallmark of asthma, asthma is not the only condition that leads to AHR. A limited differential diagnosis of AHR is shown in Table 12b.1.
