First of all, deciphering accurate blood pressure information isn’t always easy, so-patent or no patent-Fitbit will have plenty of testing to do before it releases the feature in one of its wearables.Īnd secondly, it’s not clear how advanced Apple is in its work, though the company is known for its belief that what’s important is not do it first but do it right. So, will Fitbit implement this before Apple gets round to it (the Cupertino giant is believed to be working on adding this capability to a future Apple Watch)? Well, it’s hard to know. Standard approaches to determining blood pressure from oscillometric data can be used.” The resulting PPG signal and associated pressure data is used to calculate blood pressure. The patent says, “A user applies a variable pressure to his or her blood vessels while a PPG sensor measures the amplitude of blood volume pulses. This means the sensor can divine systolic and diastolic readings, which is what makes up a blood pressure measurement. Instructions will follow as to how much pressure should be applied and the heartbeat is measured through a photoplethysmogram (PPG) sensor that works optically. The user presses the sensor with their index finger, where the radial artery is, placing it sideways on the sensor. The patent shows a wearable device that has a pressure sensor in the display.
Where “a traditional blood pressure cuff works by squeezing an artery with a varying amount of pressure and ‘listening’ for the strength of the patient’s heart beating against that pressure,” as the patent says, this device works differently. It’s clever, but not quite comfortable enough to wear every day.Īnyway, Fitbit’s new patent, spotted by GizmoChina, suggests that blood pressure tracking from nothing but a wearable is on the horizon, no cuff required. It has a strap which inflates to measure your blood pressure. Now, a newly revealed patent shows that Fitbit is working delivering a blood pressure monitor in a smartwatch that doesn’t need the monthly calibration.Īctually, there is one other device that does this, the Huawei D. MORE FROM FORBES Apple Makes Surprise Change That Will Affect iPhone 15 Upgrades By David Phelan This is exciting, and it will add to the considerable health capabilities of the Watch-when it arrives. An algorithm then determines a person’s blood glucose level.” The light is then reflected back to the sensor in a way that indicates the concentration of glucose. He explains it this way: “The system uses lasers to emit specific wavelengths of light into an area below the skin where there is interstitial fluid - substances that leak out of capillaries - that can be absorbed by glucose. Gurman says Apple’s non-invasive approach will use optical absorption spectroscopy.
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