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The Times

What's a pulse oximeter? Should I buy one to monitor COVID at home?

  • Written by Stuart Marshall, Associate Professor, Department of Critical Care, The University of Melbourne
What's a pulse oximeter? Should I buy one to monitor COVID at home?Shutterstock

Having a low level of oxygen in the blood is an early sign of worsening COVID. But not everyone gets obvious symptoms. For instance, some people can have low oxygen levels without getting short of breath or feeling otherwise unwell.

So some people are buying their own device – a pulse oximeter – to monitor their oxygen...

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