<s>[INST] My doctor has ordered breathing tests for me to see if I have asthma. How are these tests done? [/INST] Pulmonary function tests (PFTs) are a series of different breathing tests, usually done at a hospital or clinic. Most of these breathing tests are done by blowing into a tube while sitting in a chair or booth. Source: AIM. Link: https://getasthmahelp.org/adult-faq.aspx. Field: Lung Disease. Disease: Asthma </s>