What accounts for changes in peak expiratory flow readings?
Me again-another question.
My peak expiratory flow readings are all over the place. Before I started on Duoneb, I was only blowing around 320-350. Now, when I get up in the mornings, I can usualy blow about 390 (I even blew a 430 yesterday afternoon around 3:00, and I was so happy!) Now, this morning, even after using my meds, I'm only blowing a 350. Does anyone know what accounts for these changes, why it would be 390 a couple of hours ago and down to 350 now? Or am I just blowing in this thing way too much and that's my problem?