Private respiratory assessment, lung function and fitness
Lung Health Check: What to Expect and Who Benefits
A private lung health check provides a personalised assessment of respiratory health, symptoms, risk factors and physical performance. Depending on the individual, it may include spirometry, lung volumes, gas-transfer testing, FeNO, imaging review or cardiopulmonary exercise testing with measurement of peak oxygen uptake. Lung cancer screening is one possible component for eligible higher-risk individuals, but it is not the only reason to have a lung health assessment.
- Baseline lung function
- Respiratory symptoms
- VO₂ peak
- Exercise fitness
- FeNO
- Low-dose CT
- Lung cancer risk
A private lung health check is broader than cancer screening
It may assess breathing symptoms, lung capacity, gas transfer, airway inflammation and exercise performance. Low-dose CT screening is relevant only for selected people with an increased risk of lung cancer.
Tests should answer a clinical question
Spirometry, gas transfer, FeNO, CT imaging and CPET assess different parts of respiratory health. A consultation helps determine which tests are likely to be useful.
What is a private lung health check?
A lung health check in private respiratory practice is a specialist, personalised assessment designed to answer a specific question about lung health. This may involve investigating symptoms, measuring baseline lung function, assessing exercise fitness, reviewing occupational or smoking exposure, or evaluating whether imaging or lung cancer screening is appropriate.
Some people arrange an assessment because they have a persistent cough, wheeze, breathlessness, chest discomfort or reduced exercise tolerance. Others feel well but want objective information about their lung function, respiratory fitness or the effect of previous smoking and environmental exposure.
A lung health check is not necessarily a fixed package of tests. The most useful approach is to begin with a respiratory consultation and select investigations according to the person’s symptoms, medical history, exposure, previous results and goals.
For example, spirometry may help identify airflow obstruction, while lung volumes can assess air trapping or restriction. Gas-transfer testing evaluates how effectively gas passes into the bloodstream. FeNO may provide evidence of type-2 airway inflammation, and CPET can objectively measure exercise capacity and peak oxygen uptake.
A private lung health check can be useful even when someone does not meet NHS lung cancer screening criteria. It may establish a baseline, investigate reduced performance or identify a respiratory abnormality that would otherwise remain unrecognised.
Who may benefit from a private lung health check?
A private assessment may be helpful for people who want a detailed understanding of their respiratory health, whether or not they have a diagnosed lung condition.
People wanting a baseline lung assessment
Spirometry, lung volumes and gas-transfer measurement can establish a baseline for future comparison and may identify unexpected abnormalities.
People with unexplained breathlessness
Specialist assessment can help distinguish airway disease, impaired gas transfer, cardiovascular limitation, deconditioning and other causes of reduced exercise capacity.
People wanting an objective fitness assessment
Cardiopulmonary exercise testing can measure peak oxygen uptake, commonly referred to as VO₂ max or VO₂ peak, and show how the heart, lungs and muscles respond to exercise.
People returning to exercise
Assessment may be useful after prolonged illness, inactivity, a respiratory infection or an unexplained reduction in fitness or exercise tolerance.
People preparing for surgery
Lung-function testing or CPET may help estimate operative risk, identify modifiable limitations and guide prehabilitation before selected major procedures.
Smokers and former smokers
Assessment can review symptoms, COPD risk, lung function, smoking cessation and whether low-dose CT screening or diagnostic imaging is appropriate.
People with occupational exposure
Those exposed to asbestos, silica, dust, fumes, chemicals or other respiratory hazards may benefit from an exposure-focused assessment and selected investigations.
People monitoring a known lung condition
Repeat measurements may help assess asthma, COPD, bronchiectasis, pulmonary fibrosis or another respiratory diagnosis over time.
People with persistent respiratory symptoms
Chronic cough, wheeze, recurrent infections, sputum production or unexplained chest discomfort may require structured respiratory investigation.
People with a family history of lung disease
Family history may be relevant when considering lung cancer, pulmonary fibrosis, emphysema, asthma or inherited respiratory conditions.
What happens during the consultation?
The consultation establishes the purpose of the assessment and determines which investigations are likely to provide useful information.
- Clarify the reason for the check The specialist will establish whether the main goal is symptom investigation, baseline testing, fitness assessment, risk review, surveillance or pre-operative evaluation.
- Review current respiratory symptoms This may include cough, sputum, wheeze, breathlessness, chest discomfort, recurrent infections, fatigue and exercise limitation.
- Discuss smoking and vaping history The review includes current and previous use, duration, average exposure, passive smoke exposure and smoking-cessation needs.
- Assess occupational and environmental exposure Relevant exposures can include asbestos, silica, construction dust, welding fumes, chemicals, mould and air pollution.
- Review medical and family history Asthma, COPD, infection, pulmonary fibrosis, heart disease, cancer, immune problems and inherited lung disease may all be relevant.
- Review previous investigations Previous CT scans, chest X-rays, blood tests, lung-function reports and exercise results can prevent unnecessary duplication.
- Perform a clinical examination Assessment may include oxygen saturation, respiratory rate, heart rate, blood pressure, body composition and examination of the chest and cardiovascular system.
- Select appropriate tests Investigations are chosen according to the clinical question, rather than automatically carrying out every available test.
Tests that may form part of a private lung health check
Spirometry
Airflow measurementWhat it measures
Spirometry measures how much air can be exhaled and how quickly it can be breathed out.
What it may identify
It can support assessment of asthma, COPD and other causes of airflow obstruction. Testing may be repeated after a bronchodilator.
Important limitation
Normal spirometry does not exclude every lung condition, including early emphysema, pulmonary vascular disease or some interstitial lung diseases.
Lung volumes
Lung capacity assessmentWhat they measure
Lung-volume testing assesses total lung capacity, residual volume and patterns of air trapping or hyperinflation.
When it is useful
It can help distinguish true restriction from a reduced spirometry result and quantify air trapping in obstructive disease.
How it is performed
Measurement may use body plethysmography in a transparent cabin or another validated gas-dilution technique.
Gas-transfer measurement
Gas exchange assessmentWhat it measures
Gas transfer estimates how effectively gas moves from the airspaces of the lungs into the bloodstream.
What may reduce it
Reduced gas transfer can occur with emphysema, pulmonary fibrosis, pulmonary vascular disease, anaemia or other conditions.
Interpretation
Results should be interpreted alongside haemoglobin, spirometry, lung volumes, imaging and the clinical history.
FeNO testing
Airway inflammationWhat it measures
FeNO measures fractional exhaled nitric oxide, which can reflect eosinophilic or type-2 airway inflammation.
When it is useful
It can support asthma diagnosis and help assess likely response or adherence to inhaled corticosteroid treatment.
Important limitation
FeNO is not a standalone asthma test. Smoking, allergy, infection and corticosteroid treatment can affect the result.
Chest imaging and CT review
Structural lung assessmentPossible role
Imaging may help assess persistent symptoms, abnormal lung function, previous findings or risk of structural lung disease.
Low-dose CT
Low-dose CT is used in targeted lung cancer screening and may identify nodules, emphysema, scarring or airway disease.
Diagnostic CT
A standard diagnostic CT protocol may be more appropriate when investigating symptoms or a known abnormality.
Cardiopulmonary exercise testing and VO₂ peak
Exercise fitness assessmentWhat it measures
CPET measures oxygen uptake, carbon-dioxide production, ventilation, heart rate and work rate during progressively increasing exercise. It provides an objective measurement of peak oxygen uptake, often referred to as VO₂ max or VO₂ peak.
Who may benefit
It may help people with unexplained breathlessness, reduced fitness, exercise intolerance, post-illness decline, or those preparing for major surgery or a structured training programme.
What the result can show
CPET may identify respiratory limitation, cardiovascular limitation, dysfunctional breathing, deconditioning or a mixed pattern. Results require specialist interpretation.
Using a lung health check to assess fitness and exercise performance
Some people seek private assessment because they feel less fit than expected, become breathless sooner than their peers or want an objective measure before beginning a new training programme.
Resting lung-function tests and CPET provide different information. Spirometry, lung volumes and gas transfer assess the respiratory system at rest. CPET evaluates how the respiratory, cardiovascular and muscular systems work together during exercise.
Establishing VO₂ peak
Peak oxygen uptake provides an objective measure of aerobic capacity and can be compared with expected values for age and sex.
Investigating early exercise limitation
CPET may show whether reduced performance is caused mainly by breathing limitation, cardiovascular limitation, deconditioning or several factors.
Planning rehabilitation
Findings may help guide pulmonary rehabilitation, prehabilitation or a graded return-to-exercise programme.
Assessing change over time
Repeat testing may sometimes help document recovery or monitor a clinically meaningful change in exercise performance.
VO₂ peak is only one part of CPET interpretation
A specialist also reviews breathing reserve, oxygen pulse, ventilatory efficiency, heart-rate response, oxygen saturation, symptoms and the reason the test stopped. The result should not be reduced to one fitness number.
NHS lung cancer screening: one specific type of lung health check
The NHS Lung Cancer Screening Programme is a targeted pathway for people with an increased risk of lung cancer. It is different from a broader private respiratory health assessment.
In England, eligible current or former smokers aged 55 to 74 may be invited for an initial risk assessment. The appointment reviews smoking history, general health and other risk information. Only people assessed as being at sufficiently increased risk are offered low-dose CT.
| Stage | What happens | Possible outcome |
|---|---|---|
| Invitation | Eligible current or former smokers may be contacted by their GP practice or local screening service. | An initial screening risk assessment is arranged. |
| Risk assessment | Smoking history, health information and validated risk tools are used to estimate lung cancer risk. | No CT, GP follow-up or an offer of low-dose CT. |
| Low-dose CT | Detailed images of the lungs are obtained using a reduced radiation dose. | Normal result, interval scan or further investigation. |
| Further assessment | A suspicious abnormality may require additional imaging, PET-CT, bronchoscopy or biopsy. | Referral to an appropriate respiratory or lung cancer diagnostic pathway. |
Private assessment can complement but does not replace NHS screening
A private respiratory assessment may evaluate symptoms, lung function or exercise capacity. Participation in NHS lung cancer screening remains governed by the national eligibility and screening pathway.
Do not wait for screening when concerning symptoms are present
Lung cancer screening is intended for people without symptoms suggesting active disease. Seek prompt clinical assessment for:
- A persistent cough or a change in a longstanding cough
- Coughing up blood
- Progressive or unexplained breathlessness
- Unexplained weight loss or loss of appetite
- Persistent chest or shoulder pain
- Recurrent or non-resolving chest infections
- Persistent hoarseness or unexplained fatigue
Factors that may increase the risk of lung disease
Understanding the results
Results should be interpreted together rather than in isolation. One abnormal value does not always establish a diagnosis, and a normal result does not exclude every respiratory condition.
| Possible finding | What it may suggest | Possible next step |
|---|---|---|
| Normal baseline tests | No important abnormality identified on the tests performed | Reassurance, risk reduction or future comparison if needed |
| Airflow obstruction | Asthma, COPD or another obstructive airway condition | Bronchodilator testing, inhaler review or additional assessment |
| Air trapping or hyperinflation | Obstructive airway disease or small-airway dysfunction | Clinical correlation, imaging or treatment review |
| Reduced gas transfer | Emphysema, interstitial disease, pulmonary vascular disease, anaemia or another cause | Imaging, blood tests, cardiac assessment or further review |
| Raised FeNO | Type-2 or eosinophilic airway inflammation | Interpret alongside symptoms, spirometry and treatment history |
| Reduced VO₂ peak | Respiratory limitation, cardiovascular limitation, deconditioning or a mixed pattern | Targeted treatment, rehabilitation or further investigation |
| Small pulmonary nodule | Often benign, but risk depends on size, appearance and growth | Surveillance CT or specialist investigation |
How to prepare for your assessment
Do not stop prescribed inhalers or medication unless the testing service has specifically advised you to do so.
When to seek urgent medical help
A routine lung health check is not suitable for an emergency
Seek urgent medical help for:
- Severe or rapidly worsening breathlessness
- Heavy or persistent coughing of fresh blood
- Blue or grey lips, collapse or confusion
- Severe chest pain, especially with sweating or nausea
- A marked fall in oxygen saturation
- Sudden breathlessness with chest pain or fainting
Call 999 for severe breathing difficulty, collapse, heavy bleeding or another immediately life-threatening symptom.
Conclusion
A private lung health check is broader than lung cancer screening. It can investigate respiratory symptoms, establish baseline lung function, review smoking or occupational exposure and objectively assess exercise capacity.
Spirometry, lung volumes, gas-transfer testing and FeNO assess different parts of respiratory function. Cardiopulmonary exercise testing examines how the lungs, heart and muscles respond during exercise and can provide a measured peak oxygen uptake.
People may benefit even when they do not have a diagnosed lung condition or meet NHS screening criteria. Examples include those with unexplained breathlessness, reduced fitness, persistent cough, previous smoking, occupational exposure or a desire for a baseline respiratory assessment.
NHS lung cancer screening remains an important but separate pathway. It is targeted to eligible higher-risk current and former smokers and uses low-dose CT after an initial risk assessment.
The most useful assessment is personalised. Tests should be chosen to answer a specific clinical question, and results should be interpreted together by a clinician with respiratory expertise.
Frequently asked questions
Can I have a lung health check even if I do not have symptoms?
Yes. Some people choose a private assessment to establish baseline lung function, review previous exposure or obtain an objective measure of exercise performance.
Is a private lung health check the same as NHS lung cancer screening?
No. A private lung health check can assess symptoms, lung function, airway inflammation and exercise capacity. NHS lung cancer screening is a targeted national pathway for eligible higher-risk individuals.
Can a lung health check measure my VO₂ max?
Cardiopulmonary exercise testing can measure peak oxygen uptake, often called VO₂ max or VO₂ peak. It also provides information about respiratory, cardiovascular and muscular responses to exercise.
Does everyone need cardiopulmonary exercise testing?
No. CPET is most useful when assessing unexplained breathlessness, reduced exercise capacity, pre-operative risk or a specific fitness question.
What is the difference between spirometry and lung volumes?
Spirometry measures airflow and the volume exhaled. Lung volumes assess total lung capacity, residual air, air trapping and hyperinflation.
What does gas-transfer testing show?
It estimates how effectively gas moves from the lungs into the bloodstream. Reduced values can occur in emphysema, pulmonary fibrosis, pulmonary vascular disease and other conditions.
Is FeNO a lung cancer test?
No. FeNO assesses a type of airway inflammation associated with asthma. It does not screen for or exclude lung cancer.
Should a former smoker have a private lung assessment?
A former smoker may benefit when there are respiratory symptoms, concerns about COPD, reduced fitness, occupational exposure or questions about lung cancer screening eligibility.
Does a normal chest X-ray prove that the lungs are healthy?
No. A chest X-ray cannot exclude every lung condition. Symptoms, risk factors and lung-function findings may justify more detailed assessment.
Can a lung health check help before surgery?
Yes, in selected patients. Lung-function testing or CPET may help estimate risk, identify modifiable limitations and guide prehabilitation.
References and further information
- NHS. Lung cancer screening. View NHS information
- UK National Screening Committee. Lung cancer screening recommendation. View the UK NSC recommendation
- NHS England. Quality assurance standards for the Lung Cancer Screening Programme. View the national standards
- National Institute for Health and Care Excellence. Lung cancer: diagnosis and management, NG122. View NICE guidance
- National Institute for Health and Care Excellence. Asthma: diagnosis, monitoring and chronic asthma management. View NICE asthma guidance
