US 12,433,497 B2
Techniques for determining blood pressure based on a relative timing of pulses
Antti Aleksi Rantanen, Oulu (FI); Heli Tuulia Koskimäki, Oulu (FI); Jussi Petteri Järvelä, Kempele (FI); Tero Juhani Vallius, Kontio (FI); Mikko Pellervo Tuohimaa, Kempele (FI); Veli-Pekka Kullervo Halme, Oulu (FI); and Juka-Pekka Syrjälä, Oulu (FI)
Assigned to Oura Health Oy, Oulu (FI)
Filed by Oura Health Oy, Oulu (FI)
Filed on Mar. 24, 2023, as Appl. No. 18/189,888.
Prior Publication US 2024/0315578 A1, Sep. 26, 2024
Int. Cl. A61B 5/021 (2006.01); A61B 5/00 (2006.01); A61B 5/0205 (2006.01); A61B 5/024 (2006.01)
CPC A61B 5/02125 (2013.01) [A61B 5/0024 (2013.01); A61B 5/0205 (2013.01); A61B 5/02427 (2013.01); A61B 5/6826 (2013.01); A61B 5/7278 (2013.01); A61B 5/7435 (2013.01); A61B 5/7475 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for measuring blood pressure comprising:
a first wearable device located at a first physiological location of a body of a user, the first wearable device comprising a first motion sensor, the first wearable device configured to measure first photoplethysmogram (PPG) data using one or more first optical components;
a second wearable device located at a second physiological location of the body of the user, the second wearable device comprising a second motion sensor, the second wearable device configured to measure second PPG data using one or more second optical components; and
one or more processors communicatively coupled to the first wearable device and the second wearable device, the one or more processors configured to:
acquire first physiological data from the user via the first wearable device, the first physiological data comprising the first PPG data obtained via the one or more first optical components and first movement data associated with a physical activity of the user obtained via the first motion sensor;
determine a first pulse observation time of a heartbeat of the user at the first physiological location based at least in part on the first movement data associated with the physical activity of the user obtained via the first motion sensor;
acquire second physiological data from the user via the second wearable device, the second physiological data comprising the second PPG data obtained via the one or more second optical components and second movement data associated with the physical activity of the user obtained via the second motion sensor, the second physiological data indicating a second pulse observation time of the heartbeat, an additional heartbeat of the user, or both, at the second physiological location;
determine a pulse transmit time associated with the heartbeat, the additional heartbeat, or both, based at least in part on a comparison between the first pulse observation time and the second pulse observation time;
determine a motion state of the user based at least in part on the first movement data and the second movement data;
determine a blood pressure metric for the user based at least in part on the pulse transmit time and the motion state of the user; and
transmit, to a user device associated with the user, a signal configured to cause a graphical user interface of the user device to display a blood pressure alert based at least in part on the blood pressure metric deviating from a baseline blood pressure metric and an instruction for the user to adjust one or more characteristics of the first wearable device, the second wearable device, or both, for calibrating the blood pressure metric.