Reversibility of Airway Obstruction vs Bronchodilatation: Do We Speak the Same Language?

Figures & data

Table 1.  Classification of the reversibility test results.

∆FEV1, ∆FVC
post BD FEV1/FVC	> LLN	< LLN
>200 mL and >12%	reversible AO, positive BD test	irreversible AO, positive BD test
<200 mL or <12%	reversible AO, negative BD test	irreversible AO, negative BD test

LLN –lower limit of normal, AO –airway obstruction, BD –bronchodilator, ∆ –change of parameter after BD.

Figure 1.  Possible relations between results of bronchodilatation test and the diagnosis of asthma and COPD (LLN –lower limit of normal, BD –bronchodilator, ∆ - change of parameter after BD).