Chronic obstructive pulmonary disease (COPD) is a respiratory condition characterized by chronic inflammation that hinders the flow of air in and out of the lungs. As a progressive disease, COPD worsens gradually over time. Healthcare professionals utilize the Global Initiative for Chronic Obstructive Lung Disease (GOLD) system to categorize the stages of COPD and measure its progression. In recent years, this system has been revised to include not only spirometry results but also the subjective severity of symptoms when determining the classification of COPD.
Understanding the Functioning of COPD Stages
When diagnosing chronic obstructive pulmonary disease (COPD), medical professionals employ a device called a spirometer to assess an individual’s lung capacity and the speed at which they can exhale air. This evaluation yields two essential measurements: forced vital capacity (FVC) and forced expiratory volume in one second (FEV1). To receive a COPD diagnosis, an individual must have an FEV1/FVC ratio lower than 0.7.
Medical experts utilize these measurements to determine the severity of COPD, categorizing it into stages 1 to 4. Additionally, the GOLD system now employs a lettering system, ranging from A to D, to describe the subjective severity of symptoms and the frequency of exacerbations. Exacerbations refer to instances when COPD symptoms suddenly worsen. The stages are as follows:
Stage 1A and Stage 1B: Early COPD
Early COPD is divided into two stages: stage 1A and stage 1B. These stages represent the earliest and mildest period of COPD. During this stage, individuals may not exhibit any symptoms and may not even be aware that something is amiss. In stage 1, the FEV1 (forced expiratory volume in one second) is between 80 and 100 percent of the predicted value. However, if symptoms do arise, they commonly include shortness of breath or general fatigue. Unfortunately, many individuals mistake these mild issues for allergies or the common cold.