This test may be performed if your symptoms and spirometry test do not clearly show asthma.

如果你的症状和肺功能测试并不能清楚地表明你患有哮喘，那么你就可以进行这项试验。

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Or she may perform what's known as a spirometry test and, if that signals asthma, an inhalation challenge—both of which help your doctor gauge your lung function.

她也可能会采用呼吸量测定法，如果出现哮喘迹象，她还会让你试试吸入剂——这两种方法都有助于医生衡量你的肺功能。

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During this test, you inhale increasing amounts of methacholine aerosol mist before and after spirometry.

在这个试验中，你要先吸入大量的醋甲胆碱气雾剂，然后再进行肺活量测试。

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In future studies, Sims says that the researchers should diagnose COPD using a breathing test called spirometry.

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