春夏交替,气温变化大,我经常感冒,咳得厉害时还有些喘息,朋友建议我去做肺功能测试,请问肺功能测试用来诊断什么疾病?测试前需要做哪些准备?广西董先生肺功能测试是诊断慢阻肺等慢性呼吸系统疾病的主要检查手 Alternating between spring and summer, the temperature changes, I often cold, cough when still some breathing, my friend suggested that I do pulmonary function tests, what is the lung function test used to diagnose? What to do before the test? Functional testing is the main checkup for diagnosing chronic respiratory diseases such as COPD