Medical Matters > Cardiopulmonary Exercise Testing (CPET)

ME Essential Spring 2021


Why aren’t the oxygen levels of ME sufferers routinely checked?


The simple answer is that routinely measuring oxygen levels in ME/CFS isn’t going to help with either diagnosis or management – unless there is some indication that the person may also have an underlying respiratory disease.

What can be helpful in relation to both diagnosis and management of ME/CFS is having a two-day cardiopulmonary exercise test – which measures dynamic oxygen uptake and use. But Cardiopulmonary Exercise Testing (CPET) testing is not easy to organise – as it is a hospital-based investigation.

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Medical Matters is for information purposes only. The answers provided by Dr Shepherd and the ME Association’s other expert advisers should not be construed as medical advice. We recommend that any information you deem relevant is discussed with your GP as soon as possible. It is important to obtain advice from a GP who is in charge of your clinical care, who knows you well, and who can consider other likely causes for symptoms. Seek personalised medical advice whenever a new symptom arises, or an existing symptom worsens. Don't assume that new or worsened symptoms are a result of having ME/CFS.

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