@mic1953 I had one PFT - I was never given the results . It was ordered because they were trying to verify my need for oxygen. I had been put on oxygen by an ER and held overnight for a c scan the next morning . A doctor came in later that morning and confirmed she saw emphysema in my lungs . I went home with a couple tanks and was on it 24/7. I needed a home concentrator. Before they would prescribe one, they convinced me I needed that test . The machine they required me to use for that test , in their healthcare system , was over 100 miles away .. I went by car to that hospital . It was a machine that had a chamber . I sat on a stool and blew into a device on an air hose . That was it . So then I left . They got to use their fancy machine. To the tune 🎵 of over 3k. / and I got my home oxygen concentrator. Yes , I am jaded . I wish all of you another good day . Peace , Crystalena

@mic1953 I have given the “stage” definition an F for clarity . I don’t use the term any more . People hear stage 4 with cancer . I don’t have cancer . It is a miss used term. There is not a stage scale for. Emphysema . The most one can do is describe how much oxygen you require to stay from 90 to 95 on the oxymeter . The usage goes up with activity. I have been on 24/7 oxygen for 3 years. No one at medical care asks you what stage you are. They want to know how much oxygen you use . If you are not using it at times that is great . But if you are not using an oximeter, then you don’t know. I went without oxygen. Not even knowing I had a problem. When they did check , I was immediately put on 24/7 oxygen . So do not rely on your body to tell you . Use the oximeter