Airway inflammation can narrow the passages and increase mucus, making it harder for air to move out during exhalation. Damage to alveolar walls can also reduce the surface available for gas exchange. Together, these changes contribute to persistent airflow limitation and breathing difficulty, while helping explain why the condition may progressively affect respiratory function.
Spirometry provides an objective assessment of airflow obstruction rather than relying only on reported breathlessness or physical examination. Clinicians use the results with symptom history and examination findings to support diagnosis and classify severity. This information helps guide management decisions and provides a structured way to evaluate the degree of impaired expiratory airflow.
Tobacco smoke and other inhaled irritants are major risk factors because they contribute to the chronic airway and lung changes associated with COPD. Continued exposure can sustain the processes that narrow airways, increase mucus, or damage alveolar walls. Smoking cessation therefore addresses an important underlying risk and forms a central part of disease management.
Evaluation combines several sources of information rather than using one finding alone. Clinicians review the patient’s symptom history, perform a physical examination, and use spirometry to assess airflow obstruction. The combined results support diagnosis and severity classification, allowing care to be considered in relation to the patient’s breathing difficulties and measured respiratory impairment.
Management may combine smoking cessation, inhaled bronchodilators, pulmonary rehabilitation, vaccination, and oxygen therapy for selected patients. These options address different needs: reducing exposure to an important risk, supporting airflow, improving functional capacity, preventing relevant health complications, or providing oxygen when indicated. The evaluation findings help guide which measures are appropriate.
Pulmonary rehabilitation can improve exercise capacity, helping patients function more effectively despite breathing limitations. Vaccination is another component of care that may help reduce exacerbations, or episodes in which the condition worsens. Alongside other treatments, these measures can support quality of life and reduce the burden of COPD-related respiratory problems.