Respiratory and chest services

Spirometry is a way of measuring how well your lungs are functioning. It can be used to diagnose lung disorders, or to test the effectiveness of medication you may be taking for lung-related problems such as asthma.

At The London Clinic, our team of doctors perform spirometry to determine how well your lungs are working. This can be done as an outpatient procedure and is a key part of your lung function test.


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What is it for?

Used to diagnose lung disorders

Treatment overview

What does spirometry measure?

Spirometry is the commonest form of lung function tests. It measures the speed and volume with which your lungs fill up with and expel air when you breathe. The most common measurements for this test are:

  • Forced expiratory volume in one second (FEV1): this measures how much air you can forcibly blow out in one second. In normal healthy lungs, between 70 and 80% of the air in the lungs can be forcibly expelled in this time.
  • Forced vital capacity: this is the amount of air you can fully and forcibly expel in a single breath.
  • Forced expiratory ratio (FEV1/FVC): this is the ratio (proportion) of air blown out in the first second taken as a fraction of the total amount of air that is finally expelled following a forced expiration.
  • Peak expiratory flow (PEF): unlike the above which measure air volume, this measures how fast you can forcibly breathe out, in other words the maximum speed of airflow during expiration.
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Why have spirometry?

Spirometry can help your doctor to diagnose and judge the severity of various lung diseases including asthma, chronic obstructive pulmonary disease (COPD), bronchiectasis and pulmonary fibrosis. Spirometry can also be used to assess how well you are responding to treatment for one of these conditions.

Body plethysmography

Body plethysmography is a technique to analyse other aspects of pulmonary function tests. By seating the patient inside a see-through sealed unit that holds a known pressure and volume of air, adjustments can be made to accurately measure the following:

  • Resistance in the airways
  • Different volumes of air in the lungs (including functional residual capacity and total lung capacity).

This test is completed as part of a full lung function test.

Why choose The London Clinic

Excellence in one place

We operate as teams of experts with world-class resources dedicated to maintaining the highest standards of medical care. You are surrounded by the latest treatments and advice with everything you need to get back to your best health.

Personal care, every time

Exceptional patient care is a way of life for us. Our nurses, clinicians and support teams are dedicated to the care of a very small number of patients, so have more time for you. They’ll be with you every step of the way, tailoring your care around you and giving the peace-of-mind that comes with knowing you’re in the best hands.

Effortlessly simple

We work together as one to guide you through each step of your experience, with complexities unravelled and answers readily to hand. Your personal treatment plan will be laid out for you, with all the details taken care of so you can focus on you.

What's included in your package?

Choosing The London Clinic means your treatment plan will be laid out for you, with all the details taken care of so you can focus on you.


Your treatment package will include:

  • Enhanced pre-admission assessment
  • Your treatment with our complete care team at your fingertips
  • Personalised aftercare and follow-up

We want you to be in control of your health. That’s why we also offer optional services such as comprehensive recovery packages and extra touches for you to choose from during your stay with us.

How to pay

  • You can use private medical insurance (PMI) to access this treatment. We work with all major PMI providers in the UK and many internationally
  • You can pay for yourself (self-pay)
  • If you’re paying for yourself, we have finance options available with Chrysalis

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