Smartwatches with pulse oximeter sensors use infrared light to measure blood oxygen saturation and heart rate. These sensors analyze how light passes through the skin and blood vessels. Algorithms interpret the data based on the different absorption rates of infrared wavelengths. How accurate can they be? Do you think measurements taken this way are close to those taken in clinical settings?
How do pulse oximeter sensors work?
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Pulse oximeter sensor accuracy varies depending on age and the device itself, bro. The ones used at home usually have a 2-4% loss in accuracy compared to clinical-grade devices. To improve their accuracy, it seems like they need constant calibration. I wonder how much their algorithms are trained with real data?