What is Pulse oximeter accuracy and perfusion index?
SpO2 measures blood oxygen; perfusion index tells you how strong the signal is.
Short answer
No FDA/CE marking and no published accuracy range — avoid for serious monitoring.
Pulse oximeter accuracy and perfusion index when buying a home medical devices
SpO2 measures blood oxygen; perfusion index tells you how strong the signal is.
Why it matters: Low perfusion, cold fingers or nail polish make cheap oximeters unreliable.
Look for: No FDA/CE marking and no published accuracy range — avoid for serious monitoring.
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