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Normal value for FEV1
80% predicted value
Lung values impact from obstructive disease
FEV1 reduced, FEF 25-75 reduced, FVC normal or decreased, FEV1/FVC decreased
Why is FET increased in obstructive disease?
Lower flow but equal volume
Why is FEV1 decreased?
Smaller airway closure
Lung values impact form restrictive disease
FEV1 decreased, FEF 25-75 decreased, FVC decreased, FEV1/FVC decreased
What is FEF?
How fast air comes out at different points
What is PEF?
How fast someone can expire air