NEET PG Medical – 2019 – Question – 24
When the values of Fev1=1.3 & FCV=3.9. Which of the following does this signify?
a) Normal lung function
b) Obstructive lung disease
c) Restrictive lung disease
d) Both
Correct Answer – B
Ans: B. Obstructive lung disease
Measurement of the bronchodilator response of forced expiratory volume in 1 second (FEV1) is an important method in clinical respiratory medicine.
This measurement is used to predict the response to bronchodilator treatment and is part of the diagnosis of COPD and asthma.
The bronchodilator response of forced vital capacity (FVC) has less clinical use than the bronchodilator response of FEV1 but may add important clinical physiological information.
Airway obstruction was defined as FEV1/FVC ratio below lower limit of normal (LLN) before bronchodilation, and COPD was defined as an FEV1/FVC ratio below LLN after bronchodilation.
