Question

In patients with a post-bronchodilator FEV1/FVC < 0.70, at what post-bronchodilator FEV1 predicted value is the COPD severity classified as Stage 2 or 'moderate'?

Answer 1

Patients with a post-bronchodilator FEV1/FVC < 0.70 are classified as Stage 2 or 'moderate' if their post-bronchodilator FEV1 is between 50-79% of the predicted value according to the GOLD guidelines.

Step-by-step explanation:

In patients with a post-bronchodilator FEV1/FVC < 0.70, the COPD severity is classified as Stage 2 or 'moderate' when the post-bronchodilator FEV1 is between 50-79% of the predicted value.

For example, if the predicted FEV1 value for a patient is 2.5 liters, then the COPD severity would be classified as Stage 2 or 'moderate' if the post-bronchodilator FEV1 is between 1.25 and 1.97 liters.

This classification is based on the Global Initiative for Chronic Obstructive Lung Disease (GOLD) guidelines, which categorize COPD severity using spirometry measurements.