Reversibility assessment

A reversibility assessment is a test to see if your breathing problems improve with the help of an inhaler or medication.

Enquiries & Appointments

The Portland Hospital_Nov 23_171.jpg


A reversibility assessment is often a part of a spirometry test, which is a test to see how well your lungs are working.

Both tests can help you to find out if you have a breathing problem, such as asthma.

Need to know

Our respiratory physiologists will start by asking you to carry out a baseline spirometry. This involves breathing in and out of a spirometer, a special instrument that measures how much air you can push out your lungs in one breath.

They will then ask you to breathe in increasing doses of a dry powder. After each dose, you will be asked to repeat the spirometry so we can assess any changes. If your airway is normal, then it won't react to the powder. If you have hyper-sensitive airways (such as in asthma), then the powder will affect the airways and we'll see a change in your spirometry results during the test. A reversibility assessment lasts about 30 minutes in a lung function consultation room.
A spirometry and reversibility assessment doesn't require any special preparation beforehand. Your GP or consultant respiratory therapist will explain what's involved and answer any questions you might have.
Your GP or respiratory physiologist will explain the results of the test immediately after it. You'll also be able to go home straight after.

Our Reversibility assessment locations

The Harley Street Clinic

The Harley Street Clinic

35 Weymouth Street W1G 8BJ London
The Lister Hospital

The Lister Hospital

Chelsea Bridge Road, SW1W 8RH London

This content is intended for general information only and does not replace the need for personal advice from a qualified health professional.