$GTCH GBT/Tokenize is now conducting further research for a faster and potentially less power consuming system to measure heart rate and blood oxygen levels. In this research different integrated circuits are considered along with additional circuitries. Two types of PPG (photoplethysmography - an optical measurement method that is used for heart rate and oxygen level monitoring using a light source and a photodetector at the surface of skin) will be evaluated, transmittance and reflectance. In transmittance PPG, the light source is placed on one side of the tissue, while the light detector is placed on the other side. This type of PPG can only be used in small volume organs and requires further mechanical infrastructure, like clamping devices and similar. In a reflectance type PPG, the light source and detector are both placed on the same side of the tissue. qTerm is a reflectance type based device. The source emits the light into the tissue and the detector measures the variation in the reflected light. This design type is less complicated and easy for use. This type of technology can be used over any part of the body. The research includes a platform for measuring the heart rate and blood oxygen to conduct further experiments and tests to optimize results. The research is targeted to prepare the next generation sensors and controlling circuits for future releases of qTerm.
https://www.wsj.com/articles/gbt-tokenize-pos...32?tesla=y
https://www.wsj.com/articles/gbt-tokenize-pos...32?tesla=y
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