Granted Patent B2

US 12,186,103 · App. 17/393,157 · Granted Jan 7, 2025

Inventors: Christopher Elliott (Surrey, GB); Mark-Eric Jones (Cossonay-Ville, CH); Mark Bennett (Surrey, GB); Mikhail Nagoga (Pully, CH)

Assignee: LMD IP, LLC

A61B5/6898A61B5/02055A61B5/02125A61B5/02225A61B5/02233A61B5/02241A61B5/0261A61B5/14532A61B5/1455A61B5/14551A61B5/332A61B5/7405A61B5/742G01K13/20A61B5/01A61B7/02A61B8/06A61B2560/0252H04M2250/12

Abstract

Claims (45)

1. A system comprising:

a processor; and

a signal acquisition device for acquiring signals which can be used to derive a measurement of the blood pressure of a user, wherein the signal acquisition device comprises:

a blood flow occlusion device adapted to have one side only of a body part pressed against it such that a range of pressures are exerted by moving the body part against and/or away from on the blood flow occlusion device, wherein the range of pressures includes a pressure sufficient to restrict or completely block the flow of blood during systole,

a pressure sensor configured to measure the range of pressures applied by the body part to the blood flow occlusion device, and

a blood flow detecting device configured to detect the flow of blood through the body part in contact with the blood flow occlusion device;

wherein the processor is configured to determine a measurement of blood pressure from the applied pressures and the detected flow of blood.

2. The system of claim 1 , wherein the blood flow detecting device employs an oscillometric method.

3. The system of claim 1 , wherein the blood flow detecting device is an optical sensor.

4. The system of claim 1 , wherein the blood flow occlusion device comprises a button, the surface of which is adapted to be brought into contact with the body part, and the pressure sensor includes a sensor for determining the force applied to the button.

5. The system of claim 4 , wherein the button comprises a plurality of elements, each of which is connected to a separate force sensor.

6. The system of claim 1 , wherein the blood occlusion device comprises a pad filled with a fluid and the pressure sensor includes a sensor for determining the pressure in the fluid.

7. The blood pressure monitoring system of claim 1 , wherein the range of pressures includes a pressure sufficient to completely block the flow of blood during systole.

8. The blood pressure monitoring system of claim 1 , wherein the processor is adapted to issue audible or visual instructions to the user to vary the force with which the body part is pressed onto the blood flow occlusion device.

9. A system comprising:

a processor; and

a signal acquisition device for acquiring signals which can be used to derive a measurement of the blood pressure of a user, wherein the signal acquisition device comprises:

a button adapted to have one side only of a body part pressed against it such that a range of pressures are exerted by moving the body part against and/or away from on the button,

a pressure sensor configured to measure the range of pressures applied by the body part to the button, and

an optical sensor configured to detect the flow of blood through the body part in contact with the button;

wherein the processor is configured to determine a measurement of blood pressure from the applied pressures and the detected flow of blood.

10. A system comprising:

a processor; and

a signal acquisition device for acquiring signals which can be used to derive a measurement of the blood pressure of a user, wherein the signal acquisition device comprises:

a fluid-filled pad adapted to have one side only of a body part pressed against it such that a range of pressures are exerted by moving the body part against and/or away from on the fluid-filled pad,

a pressure sensor configured to measure the pressures applied by the body part to the fluid-filled pad, and

an optical sensor configured to detect the flow of blood through the body part in contact with the fluid-filled pad;

wherein the processor is configured to determine a measurement of blood pressure from the applied pressures and the detected blood flow through the body part in contact with the fluid filled pad.

11. A blood pressure monitoring system capable of obtaining a blood pressure measurement from a user's finger, the blood pressure monitoring system comprising:

a signal acquisition device, wherein the signal acquisition device comprises:

a blood flow detecting device configured to measure blood flow through the user's finger; and

a pressure sensor configured to measure varied pressures exerted by moving the user's finger against and/or away from on the signal acquisition device; and

a processor configured to derive the blood pressure measurement as a function of the blood flow measurements and the pressures applied by the user's finger to the signal acquisition device.

12. The blood pressure monitoring system of claim 11 , wherein the blood flow detecting device comprises a photosensor.

13. The blood pressure monitoring system of claim 12 , wherein the signal acquisition device further comprises a photo-emitter and wherein the photosensor is configured for transmission measurement of light emitted through the finger by the photo-emitter and transmitted to the photosensor.

14. The blood pressure monitoring system of claim 12 , wherein the signal acquisition device further comprises a photo-emitter and wherein the photosensor is configured for scattering measurement of light emitted by the photo-emitter and scattered back from the finger to the photosensor.

15. The blood pressure monitoring device of claim 12 , wherein the photosensor comprises:

one or more photoemitters; and

one or more photodetectors.

16. The blood pressure monitoring system of claim 15 , wherein the one or more photodetectors are arranged in close proximity to the one or more photoemitters.

17. The blood pressure monitoring system of claim 15 , wherein the photosensor is adapted to emit and detect light at two or more wavelengths.

18. The blood pressure monitoring system of claim 17 , wherein a single photoemitter is adapted to emit light of two selected different wavelengths.

19. The blood pressure monitoring system of claim 17 , wherein at least two photoemitters are each adapted to emit light of a selected, different wavelength.

20. The blood pressure monitoring system of claim 17 , wherein the photosensor comprises a single photodetector configured to measure the light emitted at the two or more wavelengths.

21. The blood pressure monitoring system of claim 17 , wherein the photosensor comprises a plurality of photodetectors that are each configured to measure the light emitted at a separate wavelength.

Assignments (3)

Priority Claims (2)

Continuity (3)

References Cited (258)