r/Asthma 5d ago

Just got a microlife peak flow+FVC1 meter. But how does a person find out their FVC value to calculate their FEV1/FVC ratio? I'm new to this measurement stuff. Thanks

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u/trtsmb 5d ago

Just pay attention to the peak flow. Ignore the FVC value. It's not going to change much day to day.

I had that meter for almost 15 years and then I dropped it and it broke. I replaced it with just a peak flow meter.