Understanding Lung (Pulmonary) Function Tests
Pulmonary function tests are a group of non-invasive exams that measure how well your lungs take in and exhale air, and how efficiently they transfer oxygen into the blood. These tests are vital in diagnosing and managing lung conditions.
What Is a Lung Function Test?
Lung function tests assess various aspects of your breathing. Common types include:
Spirometry – measures airflow and lung volume
Gas diffusion tests – evaluate oxygen transfer
Plethysmography – assesses total lung capacity
Exercise tests – monitor lung function during physical activity
They’re often used to monitor progress or response to treatment for chronic respiratory issues.
What to Expect from a Lung Function Test
Here’s what typically happens during the test:
Pre-test assessment – questions about symptoms and medical history
Instructions on how to breathe into the testing device
Use of nose clips to ensure accurate measurement
Multiple breathing manoeuvres guided by a clinician
Tests may last between 30 to 60 minutes, depending on the number of tests performed
You may need to withhold inhalers or medications before testing (follow provider instructions)
Results are interpreted by a specialist, often a respiratory consultant or GP.
Who Conducts This Service
Lung function tests are conducted by:
Respiratory physiologists or technicians
Pulmonologists or respiratory consultants
Specialist nurses in lung health
GPs or nurse practitioners (in community clinics)
All providers are trained in administering and interpreting PFTs safely and effectively.
Who Might Need This Service
You might be referred for a lung function test if you have:
Asthma or suspected asthma
Chronic obstructive pulmonary disease (COPD)
Unexplained shortness of breath
Chronic cough or wheezing
Occupational lung disease
Pulmonary fibrosis or interstitial lung disease
Sleep apnoea symptoms
Pre-operative assessments for lung function
Lung tests are suitable for both adults and children (age-specific protocols may apply).
Types of Lung Function Tests
Spirometry – most common test for airflow obstruction
Peak flow testing – often used for asthma monitoring
Body plethysmography – advanced lung volume analysis
Gas transfer testing (DLCO) – measures how gases move across your lungs
Bronchodilator reversibility tests – assess response to inhaled medication
FeNO testing – measures inflammation in the airways (asthma marker)
Your doctor will choose the appropriate test based on symptoms and history.
Risks Associated with Lung Function Tests
Pulmonary function tests are safe but can occasionally cause:
Mild dizziness or light-headedness
Shortness of breath during testing
Fatigue post-test in some individuals
Not suitable for those with recent chest infections, heart attacks, or surgery
Qualified staff ensure all safety protocols are followed and will monitor you closely.
How to Choose the Right Health Professional
When booking a lung function test:
Choose clinics with certified respiratory physiologists or pulmonologists
Look for services with modern, calibrated diagnostic equipment
Ask if results are reviewed by a respiratory specialist
Check turnaround times for results and follow-up care
Use My Health Assistant to compare nearby providers and read patient reviews
Summary
A lung (pulmonary) function test is a vital tool for diagnosing and managing respiratory conditions like asthma, COPD, and more. Non-invasive, quick, and highly accurate, it provides essential insights into your lung performance. Whether for routine monitoring or new symptoms, My Health Assistant helps you find trusted professionals offering lung function tests near you—ensuring you get the respiratory care you need, when you need it.
