
Patient Education Leaflet
Lung Function Testing: What to Expect
Lung function testing measures how well your lungs move air, hold air and transfer oxygen into the blood. Tests may include spirometry, full lung volumes (body plethysmography), diffusing capacity (DLCO) and respiratory muscle strength. Results help diagnose, stage and monitor conditions such as asthma, COPD, interstitial lung disease and neuromuscular disorders.
Common symptoms
- Persistent cough or wheeze
- Breathlessness on exertion
- Suspected asthma or COPD
- Pre-operative assessment for major surgery
- Monitoring of known lung disease
- Occupational lung disease screening
When to seek specialist review
- Symptoms suggestive of an airway or lung condition
- Known respiratory diagnosis requiring monitoring
- Pre-operative evaluation
- Exposure to occupational dusts or fumes
- Medications that may affect the lungs
