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GooglePatent applicationHealth & bodyInterest 8/10

Google patents radar and wearable tech for non-invasive blood pressure checks

This filing describes a system that combines a stationary radar device with a wearable on your wrist or finger. The radar detects the movement of your heart's aortic valve, while the wearable tracks your pulse at your extremity. By measuring the time it takes for the blood pressure wave to travel between these two points, the system calculates your blood pressure without a cuff.

Why it mattersThis approach could make continuous blood pressure monitoring as easy as wearing a watch, removing the need for traditional arm cuffs.

In the filing’s own words

Various arrangements for measuring blood pressure using sensor fusion are presented herein. Radio frequency (RF) signals are emitted and RF reflection signals are received by a radar sensor of a stationary device. The RF reflection signals are analyzed at a first distance range to identify a first pulse pressure waveform (PPW) at an aortic valve of a user. Vital sign data measured at an extremity of the user by a mobile device are received by the stationary device. The vital sign data is analyzed to identify a second PPW at the extremity of the user. Using the first PPW and the second PPW, a pulse transit time from the aortic valve to the extremity is determined. Using the PTT, a blood pressure (BP) of the user is determined and an indication of the BP is output.

What exactly they claim (claim 1)

1. A blood pressure measurement system, comprising: a mobile device wearable by a user and configured to collect vital sign data at an extremity of the user; and a stationary device in communication with the mobile device, the stationary device comprising: a radio frequency (RF) emitter that emits RF signals; an RF receiver that receives RF reflection signals based on the emitted RF signals being reflected; and one or more processors configured to: analyze the RF reflection signals at a first distance range to detect movement of the aortic valve of the user; identify, based on the detected movement of the aortic valve, a first pulse pressure waveform at the aortic valve of the user; analyze the vital sign data to identify a second pulse pressure waveform at the extremity of the user; determine a pulse transit time (PTT) of a pulse pressure wave from the aortic valve of the user to the extremity of the user using the first pulse pressure waveform and the second pulse pressure waveform; determine a blood pressure of the user based on the determined PTT; and output an indication of the determined blood pressure.

Facts

Company
Google (Google LLC)
Official title
SENSOR-FUSION-BASED BLOOD PRESSURE MEASUREMENT
Publication number
US20260283485A1
Application number
19477617
Filed
Apr 28, 2023
Published
Sep 24, 2026
Inventors
6
Claims
20

Classified under

A61B 5/02125 Human necessitiesA61B 5/0004 Human necessitiesA61B 5/02416 Human necessitiesA61B 5/05 Human necessitiesA61B 5/681 Human necessitiesA61B 5/7278 Human necessities
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.