in 2021 Fitbitstarted a research initiative to measure blood pressure without the traditional method. Study, pulse arrival time (PAT) to measure blood pressure carried out to determine how it can be used. Now, Googlehas filed a patent for a new wearable blood pressure technology that could soon be released with a new smartwatch.
Patent documents, on display a wearable device with a pressure sensor is showing. To measure blood pressure, the user has to press the sensor on the panel, especially with his index finger.
The mechanism is almost identical to a conventional blood pressure cuff that is placed around the stretched upper arm and inflated until blood can no longer flow through the brachial artery. To obtain blood pressure, the strength of the heart rate against this pressure is measured.
The document says you can be given on-screen instructions to apply pressure. Also, a PPG sensor measuring heart rate device systolic and diastolic allows for readings.
“A PPG sensor measures the amplitude of blood volume pulses while a user applies a variable pressure to the blood vessels. The resulting PPG signal and associated pressure data are used to calculate blood pressure.” he is writing.