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Simple home oxygen monitors signal when to seek COVID care

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COVID-19 patients can safely use inexpensive pulse oximeters at home to watch for a drop in blood oxygen that signals they need to seek advanced care, according to a systematic review published yesterday in The Lancet Digital Health.Pulse oximeters are small devices that shine light through a patient's finger to measure his or her blood oxygen saturation.

They can be used alone or as part of a remote patient monitoring (RPM) package.Imperial College London researchers analyzed 13 observational studies involving 2,908 participants in five countries using pulse oximetry to monitor their blood oxygen levels from when the COVID-19 pandemic began in 2020 to Apr 15, 2021.

Some RPM programs had participants monitor their own oxygen levels, while others developed a mobile app or website for patients to report their readings.Participants included older people with more than one underlying illness, young people, and pregnant and postpartum women.

All participants had COVID-19 except for 12 controls in one study.Recommendations for pulse oximetry programsThe review showed that pulse oximetry enabled early identification of decreasing oxygen levels and helped triage patients with guided care escalation."Remote monitoring reduced unnecessary contact of health-care professionals with patients with COVID-19, which could control the risk of infection transmission and enable resources to be redirected to those who need them the most," the study authors wrote.For example, one study found that only 5 of 162 RPM participants required in-person assessment.

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