Is There A Way To Measure The Volume Of Air In Liters With My Exhale?
Next time you see a doctor, ask him... He'll tell you.. They have to.
been there done that.
Are These Good Numbers ? FEV1/FVC 94%
Okay What Are TIFF And Fev1? You Would Think I'd Already Know This But I Don't.
Does Any One Have A POD Machine At Home I Live In Scotland