Asthma

Question 1

Evidence of variable expiratory airflow limitation

Answer 1

o FEV1 increases after inhaling bronchodilator by >200 mL and >12% prebronchodilator value (significant bronchodilator responsiveness or reversibility)
o Average daily diurnal PEF is >10% (children: >13%)
o FEV >12% an 200mL from baseline after 4 weeks of anti-inflammatory treatment
FEV1/FVC ratio is below the lower limit of normal