支气管激发试验系用某种刺激,使支气管平滑肌收缩,再用肺功能做指标,判定支气管狭窄的程度,从而用于测定气道高反应性(AHR)。根据激发剂的不同,常用的可分为药物试验、运动试验、蒸馏水或高渗盐水激发试验、特异性支气管激发试验等。各种不同的支气管激发试验特点药物试验最常用的为组胺或乙酰甲胆碱,两者的作用机制不完全相同。前者为具有生物活性的介质,吸入后能直接刺激支气管平滑肌收缩,同时也刺激迷走神经末 Bronchial provocation test with some kind of stimulation, the bronchial smooth muscle contraction, and then use lung function as an indicator to determine the degree of bronchial stenosis, which is used to determine airway hyperresponsiveness (AHR). According to the different stimulants, commonly used can be divided into drug test, exercise test, distilled water or hypertonic saline provocation test, specific bronchial provocation test. A variety of different bronchial provocation test characteristics The most commonly used drug test for histamine or methacholine, the mechanism of action of the two are not exactly the same. The former is a bioactive medium, inhaled can directly stimulate bronchial smooth muscle contraction, but also stimulate the vagus nerve end