Hi, ya'll!
Just wanted to mention I just got back from a CF clinic in Salt Lake where I asked about the Peak Flow meter. Well, the RT was not convinced that Peak Flow does anything good. She said it is not at all indicitive of FEV1. My question then to her was, "does it really matter, even if it doesn't predict FEV1, can't you still track your OWN breathing patterns and chart so you know where you're at?" Meaning, even if its not accurate as compared to a PFT, won't it still be accurate to give a reliable reading? She said the readings are not at all reliable and when she used it once and did 5 consecutive readings and tried to breath the same on each, they were WAY different every single time, proving to her that it is not a reliable test, even if you are charting your own trends. I guess I sort of understand what she means... something has to be reliable and valid (statistically speaking) to tell you anything. If you're sick and blow and its giving you a high reading, and then you're feeling well and blow and it gives you a lower reading (if its not reliable and consistent), its told you nothing. This RT went on to say no one in the CF clinic useds peak flows, nor does the asthma doctors. They just don't think they show anything since they are so random.
Just an FYI from my clinic. I'd PERSONALLY still like one to do my own experimenting, but they wouldn't even give me an Rx for it. <img src="i/expressions/face-icon-small-sad.gif" border="0">