Pulse oximeters more useful in COVID screening for older adults

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People have become accustomed to having their temperature checked during the pandemic because fever is a key indicator of COVID-19.

A new commentary by Washington State University College of Nursing Associate Professor Catherine Van Son and Clinical Assistant Professor Deborah Eti proposes that taking a temperature is a less useful indicator of infection in older adults and that a pulse oximeter be used instead.

The , published in Frontiers in Medicine, said baseline temperatures are lower in older adults. A lower baseline temperature means a fever may be overlooked using the CDC's standard definition of 100.4 degrees Fahrenheit or greater.

"In fact," the paper says, "upwards of 30% of older adults with serious infections show mild or no fever."

Other common signs of COVID may also be dismissed and attributed to aging, such as fatigue, body aches and loss of taste or smell.

Additionally, some COVID-19 patients have no visible signs of having , such as shortness of breath, yet have below 90%. Such asymptomatic hypoxia can be associated with extremely poor outcomes.

Van Son and Eti say inexpensive, portable pulse oximeters should be considered for wide use in COVID-19 screenings of because the devices can detect changes in oxygen saturation without other indications of infection.

"Detecting (asymptomatic hypoxia) is critical for the prevention of infection progression and initiating treatment," they wrote. "Earlier interventions could help patients avoid highly invasive procedures (i.e., intubation) and improve the allocation of scarce healthcare resources."

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What is a pulse oximeter, and should you get one to warn of COVID-19?

More information: Catherine R. Van Son et al, Screening for COVID-19 in Older Adults: Pulse Oximeter vs. Temperature, Frontiers in Medicine (2021). DOI: 10.3389/fmed.2021.660886
Citation: Pulse oximeters more useful in COVID screening for older adults (2021, May 3) retrieved 4 July 2022 from https://medicalxpress.com/news/2021-05-pulse-oximeters-covid-screening-older.html
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