Blood pressure monitor

Patent metadata

Field	Value
Publication number	US-2018317784-A1
Application number	US-201816040166-A
Country	US
Kind code	A1
Filing date	Jul 19, 2018
Priority date	May 6, 2014
Publication date	Nov 8, 2018
Grant date	—

Abstract

Described herein are methods, systems, and software for monitoring blood pressure. In some embodiments, a using a mobile device is used. The blood pressure monitoring system utilizes heart rate measurements at two separate locations on the body to calculate a differential pulse arrival time which is used to estimate blood pressure. The heart rate measurements can be taken simultaneously, or they can be taken sequentially while simultaneously taking ECG measurement. If taken sequentially, the heart rate measurements are aligned with the ECG to determine the differential. Accurate, inexpensive, and discreet blood pressure monitoring is thus provided.

First claim

What is claimed is:

1 . A method for non-invasive determination of a blood pressure in a subject, said method comprising:
providing, to said subject or other user, a software application configured for use with a mobile computing device, wherein said software application is configured to determine a differential pulse arrival time, and wherein said software application is configured to determine a blood pressure of said subject based on said differential pulse arrival time.

2 . The method of claim 1 , wherein said mobile computing device comprises a first and a second electrode and an optical sensor, wherein said first and said second electrodes are configured to sense an electrocardiogram, and wherein said optical sensor is configured to sense a photoplethysmogram.

3 . The method of claim 2 , wherein said optical sensor comprises a camera that operates at a minimum speed of 30 frames per second.

4 . The method of claim 2 , wherein said first and second electrodes are removable from said mobile computing device.

5 . The method of claim 2 , wherein said differential pulse arrival time is determined using input from said first and second electrodes and said optical sensor.

6 . The method of claim 3 , wherein said software is configured to display said blood pressure of said subject on said mobile computing device.

7 . The method of claim 1 , wherein said software is configured to display said blood pressure of said subject on a device in communication with said mobile computing device.

8 . The method of claim 1 , wherein said mobile computing device comprises a smartphone.

9 . The method of claim 1 , wherein said mobile computing device comprises a tablet.

10 . The method of claim 1 , wherein said mobile computing device comprises a smartwatch.

11 . A system for non-invasive determination of a blood pressure in a subject, comprising:
a. a mobile computing device comprising a processor, an optical sensor, and a display; b. a first and a second electrode attached to said mobile computing device, coupled to said processor; and c. a non-transitory computer readable storage medium encoded with a computer program including instructions executable by said processor to cause said processor to:
i. determine a differential pulse arrival time using said first and said second electrodes and said optical sensor; and
ii. determine said blood pressure of said subject based on said differential pulse arrival time.

12 . The system of claim 11 , wherein said computer program including instructions executable by said processor further causes said processor to receive a first electrocardiogram from said first and second electrodes and receive at the same time a first photoplethysmogram from said optical sensor, and receive a second electrocardiogram from said first and second electrodes and receive at the same time a second photoplethysmogram from said optical sensor.

13 . The system of claim 12 , wherein said computer program including instructions executable by said processor further causes said processor to generate an average electrocardiogram from said first and second electrocardiograms;

14 . The system of claim 13 , wherein said determined differential pulse arrival time is based on said average electrocardiogram and said first and second photoplethysmograms

15 . The system of claim 11 , wherein said computer program including instructions executable by said processor further causes said processor to display said blood pressure of said subject on said mobile computing device.

16 . The system of claim 11 , wherein said computer program including instructions executable by said processor further causes said processor to display said blood pressure of said subject on a device in communication with said mobile computing device.

17 . The system of claim 11 , wherein the mobile computing device comprises a smartphone.

18 . The system of claim 11 , wherein the mobile computing device comprises a tablet.

19 . The system of claim 11 , wherein the mobile computing device comprises a smartwatch.

20 . The system of claim 11 , wherein said optical sensor is a camera that operates at a minimum speed of 30 frames per second.

Assignees

• Alivecor Inc

Inventors

• Albert David E

Classifications

• A61B5/02416 Primary

  using photoplethysmograph signals, e.g. generated by infrared radiation (A61B5/14552 takes precedence) · CPC title

• A61B5/02125

  of pulse wave propagation time · CPC title

• A61B5/681

  Wristwatch-type devices · CPC title

• A61B5/742

  using visual displays (displays for heart-related electrical signals, e.g. ECG, A61B5/339) · CPC title

• A61B5/0404

  Human Necessities · mapped topic