Non-invasive measurement of ambulatory blood pressure
Systems and methods are provided in which data acquisition device detects and captures ambulatory radial arterial blood pressure in a non-invasive and continuous manner through the combined use of tonometry, accelerometry and photoplethysmography, together with the detecting and translating of Mayer waves. Transformed blood pressure data, together with motion and contextual data can be used as input for machine learning algorithms and biomathematical models which can predict the general state of health of an individual. Transformed blood pressure data, together with motion and contextual data, may be communicated via wireless communications to mobile devices and/or cloud based platforms.
1. A method to provide an estimate of blood pressure of a subject, comprising:
a) using as input, a plurality of signals containing degrees of cardiac activity and motion data of the subject, including low-frequency arterial pressure fluctuations (Mayer waves), wherein at least the Mayer waves are captured using tonometry;
b) processing the plurality of signals to form blood pressure data; and
c) applying modeling to the blood pressure data to determine the estimated blood pressure of the subject.
2. The method of claim 1 , wherein the plurality of signals further comprises radial arterial pulse pressure and high frequency heart beat fluctuations.
3. The method of claim 2 , wherein the Mayer waves are further captured using photoplethysmography.
4. The method of claim 2 , wherein the plurality of signals further comprises motion signals that represent an activity rate and a breathing rate of the subject.
5. The method of claim 1 , wherein the estimated blood pressure of the subject comprises an estimate of systolic and diastolic blood pressure of the subject.
6. The method of claim 1 , wherein the estimated blood pressure of the subject comprises an estimate of mean arterial blood pressure of the subject.
7. The method of claim 1 , further comprising acquiring contextual data about the subject and using the contextual data with the blood pressure data.
8. The method of claim 7 , wherein the contextual data comprises medical and genetic data of the subject.
9. The method of claim 1 , further comprising using the estimated blood pressure of the subject to infer a physiological condition of the subject.
10. The method of claim 1 , wherein the blood pressure data and the estimated blood pressure are formed by a data acquisition device.
11. The method of claim 10 , wherein the data acquisition device comprises a wearable device.
12. The method of claim 11 , wherein the data acquisition device is configured to display the estimated blood pressure to the subject.
13. The method of claim 10 , wherein the data acquisition device is configured to wirelessly transmit the blood pressure data and the estimated blood pressure to other devices.
14. The method of claim 1 , wherein steps a-c are repeated continuously to provide continuous estimated blood pressure for the subject.