A hypoxic challenge test is a procedure performed to give us information about what might happen to your blood oxygen levels if you travel in an aeroplane.
In an aircraft there is less oxygen available in the air. For people with a respiratory problem this can cause their oxygen levels to drop too low. This test will determine whether you need additional oxygen when you are in an aircraft.
Before the test begins the Physiologist will explain the test to you in detail and will answer any questions that you may have.
For the duration of the hypoxic challenge test you will be seated. A probe will be put on your finger. This will provide us with information about your blood oxygen levels.
As part of the test it is also necessary to take several pinpricks of blood from your earlobe to provide further information about your blood oxygen levels.
The test may take up to 90 minutes to complete. The length of the test may vary depending on your blood oxygen level.
Thank you for your co-operation. This will assist us in obtaining accurate information and enable us to provide you with the most appropriate treatment.
The only discomfort you may experience is a slight scratch on your ear when a pinprick of blood is taken. There are no known side effects associated with this test.
There is no other test that would give us this information about your blood oxygen levels in a flight environment.
The Physiologist will provide information about the outcome of the test at your appointment. The report will be sent to the professional requesting the test. If you require paperwork to be completed for the airline this will need to be completed either by your Consultant or GP. If you require oxygen it will be your responsibility to organise this with the airline that you are travelling with.
You should wear normal comfortable clothing.
British Thoracic Society Standards of Care Committee (2011) BTS Clinical Statement on air travel for passengers with respiratory disease. London: British Thoracic Society.
© North Bristol NHS Trust. This edition published June 2024. Review due June 2027. NBT002290.
Telephone: 0117 414 5400
Email: respiratoryphysiology@nbt.nhs.uk