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Measures the changes in light absorption caused by variations in blood volume by emitting light into the tissue on the surface of the skin and subsequently detecting the light transmitted or reflected back.
Well-established, non-invasive optical technique used for measuring physiological parameter.
In use since 1942 in oximeters.
• Commonly be found in hospitals today
• Used in wearables to measure health indicators
The measured changes enable the assessment of various physiological characteristics in a single scan.
• Heart rate
• Oxygen saturation
• Blood pressure
• Blood tests
• 22 current vital signs and growing
