06-20-2011, 09:08 AM
There is some relation given in mtb3 abt fev1 and copd. FEV1 < 1.5 L means severe copd according to it. I didn't understand this ,searched in google but didn't find it. Everywhere it's given FEV1 80-120% is normal , not mentioned in terms of litres. Can anyone make this concept clear to me?