MRCP UK EXAMINATIONS

Detailed explanation-1: -As discussed previously, spirometry is accepted as the diagnostic test to assess airflow obstruction and classify severity of disease, based on specific cut points for FER (FEV1/FVC <0.7 after bronchodilator) and FEV1 (mild ≥80% predicted, moderate 50-80%, severe 30-49% predicted, very severe <30% predicted) (15).

Detailed explanation-2: -Ratio of FEV1/Slow Vital Capacity of < 0.7 Is Associated With Clinical, Functional, and Radiologic Features of Obstructive Lung Disease in Smokers With Preserved Lung Function-PMC.

Detailed explanation-3: -In pulmonary function testing, a postbronchodilator FEV1/FVC ratio of <0.70 is commonly considered diagnostic for COPD. The Global Initiative for Chronic Obstructive Lung Disease (GOLD) system categorizes airflow limitation into stages.

Detailed explanation-4: -Using GOLD criteria Therefore, the GOLD experts have defined the disease based on spirometric criteria by using the forced expiratory volume in one second (FEV1) and its ratio to the forced vital capacity (FVC). The main criterion for COPD is a FEV1/FVC ratio <70%.

Detailed explanation-5: -If you have a FEV1/FVC less than 70 percent, your COPD stage is based on your predicted FEV1: COPD Stage I (Mild) – Predicted FEV1 greater than 80 percent. COPD Stage II (Moderate) – Predicted FEV1 between 50 and 80 percent. COPD Stage III (Severe) – Predicted FEV1 between 30 and 50 percent.