Activity monitoring to augment personalized blood pressure model

1 . An apparatus comprising:

a control system configured to:

obtain activity information indicative of an activity performed by an apparatus user, wherein the activity information comprises an identification of the activity, an indication of a category of the activity, or any combination thereof, and

adjust a correlation model that correlates a plurality of acoustic-wave-derived features from photoacoustic plethysmography (PAPG) measurements to blood pressure values for the apparatus user, based at least in part on the obtained activity information, wherein to adjust the correlation model, the control system is configured to:

add one or more features to the plurality of acoustic-wave-derived features,

subtract one or more features from the plurality of acoustic-wave-derived features,

adjust one or more weights applied to the plurality of acoustic-wave-derived features, or

any combination thereof;

a light source system including a light-emitting component; and

a receiver system configured to detect an acoustic wave corresponding to a photoacoustic response of a blood vessel of the apparatus user to light emitted by the light source system; and

wherein the control system is further configured to estimate a blood pressure based at least in part on the adjusted correlation model and the acoustic wave.

2 . The apparatus of claim 1 , wherein, to obtain the activity information, the control system is configured to obtain sensor data indicative of the activity.

3 . The apparatus of claim 1 , further comprising one or more sensors, wherein the control system is configured to obtain the activity information using data from the one or more sensors.

4 . The apparatus of claim 3 , wherein the one or more sensors comprise:

a gyroscope,

an accelerometer,

a magnetometer,

an altimeter,

an inertial measurement unit (IMU), or

any combination thereof.

5 . The apparatus of claim 1 , wherein, to obtain the activity information, the control system is configured to receive the activity information from a device communicatively coupled with the apparatus.

6 . The apparatus of claim 1 , wherein the plurality of acoustic-wave-derived features includes historical activity information, and wherein to adjust the correlation model, the control system is configured to update the historical activity information based at least in part on the obtained activity information.

7 . The apparatus of claim 1 , wherein, to derive the PAPG measurement, the control system is configured to derive a heart rate waveform (HRW), a pulse transit time (PTT), a pulse wave velocity (PWV), or any combination thereof.

8 . A method of blood pressure estimation, the method comprising:

obtaining activity information indicative of an activity performed by a person, wherein the activity information comprises an identification of the activity, an indication of a category of the activity, or any combination thereof;

adjusting a correlation model that correlates a plurality of acoustic-wave-derived features from photoacoustic plethysmography (PAPG) measurements to blood pressure values for the person, based at least in part on the obtained activity information, wherein adjusting the correlation model comprises:

adding one or more features to the plurality of acoustic-wave-derived features,

subtracting one or more features from the plurality of acoustic-wave-derived features,

adjusting one or more weights applied to the plurality of acoustic-wave-derived features, or

any combination thereof;

detecting an acoustic wave corresponding to a photoacoustic response of a blood vessel of the person to light emitted by a light source system; and

estimating a blood pressure based at least in part on the adjusted correlation model and the acoustic wave.

9 . The method of claim 8 , further comprising controlling the light source system to emit the light.

10 . The method of claim 9 , wherein the light source system is incorporated into an apparatus used by the person, and wherein detecting the acoustic wave is performed by a receiver system of the apparatus.

11 . The method of claim 10 , wherein obtaining the activity information comprises receiving the activity information, at the apparatus, from a device communicatively coupled with the apparatus.

12 . The method of claim 10 , further comprising performing the method while the apparatus is worn by the person.

13 . The method of claim 8 , wherein obtaining the activity information comprises obtaining sensor data indicative of the activity.

14 . The method of claim 8 , wherein the activity information is obtained from one or more sensors.

15 . The method of claim 14 , further comprising obtaining the activity information using one or more sensors comprising:

a gyroscope,

an accelerometer,

a magnetometer,

an altimeter,

an inertial measurement unit (IMU), or

any combination thereof.

16 . The method of claim 8 , wherein the plurality of acoustic-wave-derived features includes historical activity information, and wherein adjusting the correlation model comprises adjusting the historical activity information based at least in part on the obtained activity information.

17 . The method of claim 8 , the PAPG measurement comprises a heart rate waveform (HRW), a pulse transit time (PTT), a pulse wave velocity (PWV), or any combination thereof.

18 . An apparatus comprising:

means for obtaining activity information indicative of an activity performed by a person, wherein the activity information comprises an identification of the activity, an indication of a category of the activity, or any combination thereof;

means for adjusting a correlation model that correlates a plurality of acoustic-wave-derived features from photoacoustic plethysmography (PAPG) measurements to blood pressure values for the person based at least in part on the obtained activity information, wherein the means for adjusting the correlation model comprise means for:

adding one or more features to the plurality of acoustic-wave-derived features,

subtracting one or more features from the plurality of acoustic-wave-derived features,

adjusting one or more weights applied to the plurality of acoustic-wave-derived features, or

any combination thereof;

means for detecting an acoustic wave corresponding to a photoacoustic response of a blood vessel of the person to light emitted by a light source system; and

means for estimating a blood pressure based at least in part on the adjusted correlation model and the acoustic wave.

19 . The apparatus of claim 18 , wherein the apparatus comprises a wearable apparatus configured to detect the acoustic wave and estimate the blood pressure when worn by the person.

20 . The apparatus of claim 18 , wherein the means for obtaining the activity information comprises means for obtaining sensor data indicative of the activity.

21 . The apparatus of claim 18 , wherein the means for obtaining the activity information comprise means for obtaining the activity information from one or more sensors.

22 . The apparatus of claim 21 , wherein the one or more sensors comprise:

a gyroscope,

an accelerometer,

a magnetometer,

an altimeter,

an inertial measurement unit (IMU), or

any combination thereof.

23 . The apparatus of claim 18 , wherein the plurality of acoustic-wave-derived features includes historical activity information, and wherein the means for adjusting the correlation model comprises means for adjusting the historical activity information based at least in part on the obtained activity information.

24 . The apparatus of claim 18 , the PAPG measurement comprises a heart rate waveform (HRW), a pulse transit time (PTT), a pulse wave velocity (PWV), or any combination thereof.