In tutorial 8, we explore the patterns of abnormality in spirometry, including the defining features of airflow obstructions and restrictive lung disease, and reversibility to aid diagnosis of COPD and Asthma.
- Two main categories of lung disease; obstructive lung diseases and restrictive lung diseases.
- In airflow obstruction, the FEV1 is reduced but the FVC remains normal, resulting in an abnormally reduced FEV1/FVC ratio.
- The defining feature of restrictive lung disease is an abnormally reduced forced vital capacity.
- The administration of a bronchodilator helps us distinguish between Asthma and COPD.