Scale-based systems and methods for monitoring heart function

• US 9,814,397 B2
• Filed: 12/11/2015
• Issued: 11/14/2017
• Est. Priority Date: 10/15/2008
• Status: Active Grant

• Current Assignee: Board of Trustees of the Leland Stanford Junior University (Stanford Management Co.)
• Original Assignee: Board of Trustees of the Leland Stanford Junior University (Stanford Management Co.)
• Inventors: Inan, Omer T., Etemadi, Mozziyar, Giovangrandi, Laurent B., Kovacs, Gregory T., Wiard, Richard M.
• Primary Examiner(s): CAREY, MICHAEL JAMES
• Application Number:
  US14/966,752
• Publication Number:
  US 20160095521A1
• Time in Patent Office: 704 Days
• Field of Search: 600481, 600508, 600526, 600527
• CPC Class Codes: A61B 5/0006 ECG or EEG signals
• CPC Class Codes: A61B 5/0024 for multiple sensor units attached to the patient, e.g. using a body or personal area network
• CPC Class Codes: A61B 5/0082 adapted for particular medical purposes
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/024 Detecting, measuring or recording pulse rate or heart rate A61B5/0205, A61B5/021 take precedence
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/029 Measuring or recording blood output from the heart, e.g. minute volume A61B8/065 takes precedence
• CPC Class Codes: A61B 5/053 Measuring electrical impedance or conductance of a portion of the body
• CPC Class Codes: A61B 5/1102 Ballistocardiography
• CPC Class Codes: A61B 5/316 Modalities, i.e. specific diagnostic methods
• CPC Class Codes: A61B 5/318 Heart-related electrical modalities, e.g. electrocardiography [ECG]
• CPC Class Codes: A61B 5/352 Detecting R peaks, e.g. for synchronising diagnostic apparatus; Estimating R-R interval
• CPC Class Codes: A61B 5/389 Electromyography [EMG]
• CPC Class Codes: A61B 5/4836 Diagnosis combined with treatment in closed-loop systems or methods A61B5/0036 takes precedence
• CPC Class Codes: A61B 5/486 Bio-feedback A61B5/375 takes precedence
• CPC Class Codes: A61B 5/6829 Foot or ankle
• CPC Class Codes: A61B 5/6887 mounted on external non-worn devices, e.g. non-medical devices
• CPC Class Codes: A61B 5/7203 for noise prevention, reduction or removal
• CPC Class Codes: A61B 5/7207 of noise induced by motion artifacts
• CPC Class Codes: A61B 5/721 using a separate sensor to detect motion or using motion information derived from signals other than the physiological signal to be measured
• CPC Class Codes: A61B 5/7253 : characterised by using transforms
• CPC Class Codes: A61B 5/7285 : for synchronising or triggering a physiological measurement or image acquisition with a physiological event or waveform, e.g. an ECG signal A61B6/5205, A61B6/541, A61B8/5207, A61B8/543 take precedence
• CPC Class Codes: A61B 5/74 : Details of notification to user or communication with user or patient indicating measured values G01D7/00; user input means input or output arrangements for computers G06F3/00
• CPC Class Codes: G01G 19/50 : having additional measuring devices, e.g. for height

Abstract

In accordance with an example embodiment, a body-weight sensing scale includes cardio-based physiological sensing circuitry to detect heart characteristics of a user, and provide outputs indicative of the detected heart characteristics. A processor circuit is arranged with the cardio-based physiological sensing circuitry to process data to provide a noise-reduced cardiogram signal which characterizes functionality/health of the user'"'"'s heart.

Claims

1. A body-weight sensing scale apparatus comprising:

a weighing scale configured and arranged with a housing and a scale platform;

user-physiologic sensors, including a first sensor and including a second sensor, configured and arranged to capture a cardiogram signal of a user from at least one foot of the user in real-time while the user is in an upright position and with said at least one foot of the user on the scale platform of the body weight sensing scale apparatus,

the user-physiologic sensors including circuitry configured and arranged to detect and output an indication of at least one of noise present in the cardiogram signal and a physiologic characteristic of the user, by sensing and capturing a series of heart-signals from a user while the user stands on the scale platform at a stationary position, the series of heart-signals corresponding to the cardiogram signal based on a plurality of a heartbeats from the user; and

a processor circuit configured and arranged to process the cardiogram signal and generate therefrom a noise-filtered cardiac-related signal indicative of a condition of the user'"'"'s heart by filtering, from the cardiogram signal, noise that is due to user movement.

2. The body-weight sensing scale apparatus of claim 1, wherein the processor circuit includes circuitry configured and arranged to track changes for a cardiac condition, or indicate an abnormal cardiac condition.

3. The body-weight sensing scale apparatus of claim 1, wherein user-physiologic sensors are configured and arranged with an electrocardiogram (ECG) sensor that, when operative, detects an ECG signal from the user.

4. The body-weight sensing scale apparatus of claim 1, wherein user-physiologic sensors are configured and arranged with a photoplethysmograph sensor that, when operative, detects blood-flow pulsations of the user.

5. The body-weight sensing scale apparatus of claim 1, wherein the cardiogram signal is a ballistocardiogram signal and wherein noise-filtered cardiac-related signal is a noise-filtered ballistocardiogram signal.

6. The body-weight sensing scale apparatus of claim 1, wherein the cardiogram signal is a ballistocardiogram (BCG) signal, wherein noise-filtered cardiac-related signal is a noise-filtered ballistocardiogram signal, and wherein the processor circuit is further configured and arranged to process the cardiogram signal by executing an algorithm to process the captured BCG signal.

7. The body-weight sensing scale apparatus of claim 1, wherein the weighing scale is integrated with the housing and the scale platform being part of the weighing scale, and further including communication circuitry located within the housing and communicatively coupled with or integrated as part of the processor circuit, the communication circuitry being configured and arranged to communicate cardio-function data with an external circuit.

8. The body-weight sensing scale apparatus of claim 1, wherein the weighing scale is integrated with the housing and the scale platform being part of the weighing scale, and further including communication circuitry located within the housing and configured and arranged to communicate wirelessly with an external circuit for providing cardio-function data to indicate detection of an abnormal cardiac function.

9. The body-weight sensing scale apparatus of claim 1, wherein the weighing scale is integrated with the housing and the scale platform being part of the weighing scale, and further including communication circuitry located within the housing and configured and arranged to communicate with a display circuit for providing cardio-function data to indicate whether the noise-filtered cardiac-related signal corresponds to detection of an abnormal cardiac function.

10. The body-weight sensing scale apparatus of claim 1, further including communication circuitry located within the housing and configured and arranged to communicate with a local memory circuit for providing cardio-function data to indicate whether the noise-filtered cardiac-related signal corresponds to detection of an abnormal cardiac function.

11. The body-weight sensing scale apparatus of claim 1, further including communication circuitry located within the housing and a user-wearable circuit, located outside the housing, the communication circuitry and the user-wearable circuit being configured and arranged to communicate with one another for sharing data regarding physiological parameters of the user.

12. The body-weight sensing scale apparatus of claim 1, wherein the noise-filtered cardiac-related signal includes an interference-cancelled cardiogram signal indicative of a condition of the user'"'"'s heart and the processor circuit is further configured to generate the interference-cancelled cardiogram signal by using an input indicative of body movement or a hemodynamic parameter and by using a timing reference from the user-physiologic sensors and a reference cardiogram signal to account for the noise interference.

13. The body-weight sensing scale apparatus of claim 12, wherein the noise-filtered cardiac-related signal is a ballistocardiogram signal.

14. The body-weight sensing scale apparatus of claim 1, wherein the user-physiologic sensors are further configured and arranged to provide an indication of body weight while the user is standing on the platform, and wherein the processor circuit is further configured and arranged to track changes for a cardiac condition or to indicate an abnormal cardiac condition, by tracking changes in the noise-filtered cardiac-related signal with changes in bodyweight of the user over time.

15. The body-weight sensing scale apparatus of claim 14, wherein the processor circuit is further configured and arranged to indicate a heart condition in response to an increase in bodyweight of the user with a detection of change in the noise-filtered cardiac-related signal over time.

16. A body-weight sensing scale system comprising:

a weighing scale configured and arranged with a housing and a scale platform;

user-physiologic sensors, including a first sensor and including a second sensor, configured and arranged to capture a cardiogram signal of a user from at least one foot of the user in real-time while the user is in an upright position and with said at least one foot of the user on the scale platform of the body weight sensing scale apparatus,

the user-physiologic sensors including circuitry configured and arranged to detect and output an indication of at least one of noise present in the BCG signal and a physiologic characteristic of the user, by sensing and capturing a series of heart-signals from a user while the user stands on the scale platform at a stationary position, the series of heart-signals corresponding to the cardiogram signal based on a plurality of a heartbeats from the user;

a user-wearable circuit including with a sensor to detect and to communicate physiological data pertaining to physiology of the user while the user wears the user-wearable circuit;

communication circuitry located within the housing;

the user-wearable circuit and the communication circuitry being configured and arranged to communicate data, including the physiological data; and

a processor circuit configured and arranged to process the cardiogram signal and generate therefrom a noise-filtered cardiac-related signal indicative of a condition of the user'"'"'s heart by filtering, from the cardiogram signal, noise that is due to user movement.

17. The body-weight sensing scale system of claim 16, further including circuitry adapted to sense vibrations in the local environment and wherein the processor circuit is further configured and arranged to process the cardiogram signal by accounting for the vibrations.

18. The body-weight sensing scale system of claim 16, wherein the user-physiologic sensors are configured and arranged to provide an ECG (electrocardiogram) signal obtained from the user.

19. The body-weight sensing scale system of claim 16, wherein the user-physiologic sensors are configured and arranged with a foot-to-foot impedance circuitry.

20. The body-weight sensing scale system of claim 16, wherein the processor circuit is further configured and arranged to generate cardiac-indicative signals over time to provide an indication of at least one of cardiac output and stroke volume for determination of a treatment need for the user.

21. The body-weight sensing scale system of claim 16, further including communication circuitry located within the housing and a user-wearable circuit, located outside the housing, the communication circuitry and the user-wearable circuit being configured and arranged to communicate with one another for sharing data regarding physiological parameters of the user.