Automatic cardiometer

• US 5,906,583 A
• Filed: 08/20/1997
• Issued: 05/25/1999
• Est. Priority Date: 08/20/1997
• Status: Expired due to Fees

• Current Assignee: RZ Comparative Diagnostics Limited
• Original Assignee: RZ Comparative Diagnostics Limited
• Inventors: Rogel, Dan
• Primary Examiner(s): Kamm, William E.
• Application Number:
  US08/914,808
• Time in Patent Office: 643 Days
• Field of Search: 600/509, 600/515, 600/516, 600/517, 600/523, 128/906, 128/920, 128/923, 128/924
• US Class Current: 600/515
• CPC Class Codes: A61B 2560/0412 Low-profile patch shaped housings
• CPC Class Codes: A61B 5/0006 ECG or EEG signals
• CPC Class Codes: A61B 5/335 using integrated circuit memory devices
• CPC Class Codes: A61B 5/349 Detecting specific parameters of the electrocardiograph cycle
• CPC Class Codes: A61B 5/352 Detecting R peaks, e.g. for synchronising diagnostic apparatus; Estimating R-R interval
• CPC Class Codes: A61B 5/6841 by using templates

Abstract

A device and method for user'"'"'s ECG self monitoring and real time analysis are provided. The device comprises: (a) a sensing element and a processing element for recording and storing a first ECG signal from the user during a first time interval and recording a second ECG signal from the same user during a second time interval; (b) a comparing element for comparing the second ECG signal to the first ECG signal; (c) a logical decision element for making a logical decision based on the comparison and providing a recommendation to the user of a step he should take. According to another embodiment, the device includes: (a) ten sensing elements and a processing element for simultaneously recording twelve ECG signals from the user during a first time interval and simultaneously recording twelve ECG signals from the user during a second time interval; (b) a comparing element for comparing each of the ECG signals recorded during the second time interval to a respective ECG signal recorded during the first time interval so as to provide twelve delta values; (c) a logical decision element for making a logical decision based on the delta values and providing a recommendation to the user of a step he should take.

Claims

1. A method of a user'"'"'s ECG self monitoring and analysis, the method comprising the steps of:

(a) recording and storing a first ECG signal from the user during a first time interval;

(b) recording a second ECG signal from the user during a second time interval;

(c) analyzing said ECG signals by comparing said second ECG signal to said first ECG signal thereby obtaining a comparison of said first and second ECG signals; and

(d) based on said analysis and comparison, making a logical decision and providing a recommendation to the user of a step the user should take.

2. The method of claim 1, further comprising the step of calculating a first ECG parameter of said first ECG signal and a second respective ECG parameter of said second ECG signal and wherein said comparison is performed by comparing said first and second ECG parameters.

3. The method of claim 2, wherein said first and second ECG parameters are selected from the group consisting of a ST level parameter derived from said first and second ECG signals, a sign of a T-wave parameter derived from said first and second ECG signals, an amplitude of a Q wave parameter derived from said first and second ECG signals, a width of a Q wave parameter derived from said first and second ECG signals, an amplitude of a R wave parameter derived from said first and second ECG signals, a heart rate parameter derived from said first and second ECG signals and a heart rhythm parameter derived from said first and second ECG signals.

4. The method of claim 1, further comprising the step of:

(e) interactively asking the user a list of questions being related to the user'"'"'s medical status and requesting the user for answers to said questions;

wherein making said logical decision and providing said recommendation to the user of said step the user should take is effected based on said answers to said questions.

5. The method of claim 1, further comprising the step of:

(e) determining a risk factor for the user;

wherein making said logical decision and providing said recommendation to the user of said step the user should take is effected based on said risk factor.

6. A method of user'"'"'s ECG self-monitoring and analysis, the method comprising the steps of:

(a) simultaneously recording twelve ECG signals from the user during a first time interval by using ten sensors;

(b) simultaneously recording twelve ECG signals from the user during a second time interval;

(c) analyzing said ECG signals by comparing each of said ECG signals recorded during said second time interval to a respective ECG signal recorded during said first time interval so as to provide twelve delta values of comparison; and

(d) based on said analysis and comparison, making a logical decision and providing a recommendation to the user of a step the user should take.

7. The method of claim 6, further comprising the step of:

(e) prior to, and for effecting, the step of making said logical decision and providing said recommendation, analyzing a number of specific pairs of said delta values of comparison.

8. The method of claim 7, wherein said twelve ECG signals recorded during said first said second time intervals are I ECG signals, II ECG signals, III ECG signals, (AVR) ECG signals, (AVL) ECG signals, (AVF) ECG signals, V1 ECG signals, V2 ECG signals, V3 ECG signals, V4 ECG signals, V5 ECG signals and V6 ECG signals, and further wherein said specific pairs of said delta values of comparison are selected from the group consisting of delta values of said I ECG signals and said (AVL) ECG signals, delta values of said II ECG signals and said III ECG signals, delta values of said III ECG signals and said (AVF) ECG signals, delta values of said (AVF) ECG signals and said V1 ECG signals, delta values of said V1 ECG signals and said V2 ECG signals, delta values of said V2 ECG signals and said V3 ECG signals, delta values of said V3 ECG signals and said V4 ECG signals, delta values of said V4 ECG signals and said V5 ECG signals and delta values of said V5 ECG signals and said V6 ECG signals.

9. The method of claim 7, further comprising the step of calculating an ECG parameter of each of said twelve ECG signals recorded during said first time interval and a respective ECG parameter of each of said twelve ECG signals recorded during said second time interval and wherein the step of analyzing said ECG signals is effected by comparing said ECG parameters to said respective ECG parameters.

10. The method of claim 9, wherein said ECG parameters and said respective ECG parameters are selected from the group consisting of a ST level parameter derived from said ECG signals, a sign of a T-wave parameter derived from said ECG signals, an amplitude of a Q wave parameter derived from said ECG signals, a width of a Q wave parameter derived from said ECG signals, an amplitude of a R wave parameter derived from said ECG signals, a heart rate parameter derived from said ECG signals and a heart rhythm parameter derived from said ECG signals.

11. The method of claim 6, further comprising the step of:

(e) interactively asking the user a list of questions being related to the user'"'"'s medical status and requesting the user for answers to said questions;

wherein making said logical decision and providing said recommendation to the user of said step the user should take is effected based on said answers to said questions.

12. The method of claim 6, further comprising the step of:

(e) determining a risk factor for the user;

wherein making said logical decision and providing said recommendation to the user of said step the user should take is effected based on said risk factor.

13. The method of claim 6, further comprising the step of:

(e) prior to, and for effecting, the step of making said logical decision and providing said recommendation, estimating R-apex locations of QRS complexes in said simultaneously recorded ECG signals, by;

(i) finding said R-apex locations for each of said simultaneously recorded ECG signals, so as to obtain a matrix of said R-apex locations, said matrix being characterized in that each of said matrix'"'"'s rows relates to a specific recorded ECG signal and each of said matrix'"'"'s columns relates to a specific QRS complex;

(ii) if at least a predetermined number of R-apex locations are within a predetermined time range, then estimating the R-apex location of said specific ECG complex to be within said predetermined time range; and

(iii) based on said number of R-apex locations being within said predetermined time range, making said logical decision and providing said recommendation.

14. A device for user'"'"'s ECG self monitoring and analysis, comprising:

(a) a sensing element and a processing element for recording and storing a first ECG signal from the user during a first time interval and recording a second ECG signal from the same user during a second time interval;

(b) a comparing element for analyzing said ECG signals by comparing said second ECG signal to said first ECG signal to thereby obtain a comparison of said first and second ECG signals; and

(c) a logical decision element, which, based on said analysis and comparison, serves for logically evaluating said comparison, making a logical decision and for providing a recommendation to the user of a step the user should take.

15. The device of claim 14, wherein said processing element calculates a first ECG parameter of said first ECG signal and a second respective ECG parameter of said second ECG signal and said comparing element compares said first and second ECG parameters.

16. The device of claim 15, wherein said first and second ECG parameters are selected from the group consisting of a ST level parameter derived from said first and second ECG signals, a sign of a T-wave parameter derived from said first and second ECG signals, an amplitude of a Q wave parameter derived from said first and second ECG signals, a width of a Q wave parameter derived from said first and second ECG signals, an amplitude of a R wave parameter derived from said first and second ECG signals, a heart rate parameter derived from said first and second ECG signals and a heart rhythm parameter derived from said first and second ECG signals.

17. The device of claim 14, wherein said device includes a display element and a keyboard for interactively communicating with the user.

18. The device of claim 17, wherein said display element serves for asking the user a list of questions being related to the user'"'"'s medical status, and wherein making said logical decision and providing said recommendation to the user by said logical decision element is effected by said logical decision element based on said answers to said questions.

19. The device of claim 17, wherein said device includes an instruction panel for instructing the user how to determine the user'"'"'s risk factor.

20. The device of claim 19, wherein said display element displays a question to the user for the user'"'"'s risk factor and said decision is made and said recommendation is given by said logical decision element based on said risk factor.

21. The device of claim 14, wherein said sensing element includes a plurality of sensors mechanically interconnected there amongst.

22. The device of claim 15, further comprising a stored information transferring element communicating with said processing element, so as to enable later analysis of said stored information.

23. The device of claim 15, further comprising elements for storing different personal codes for ECG examination, so as to enable ECG examination by different users.

24. A device of user'"'"'s ECG self-monitoring and analysis, comprising:

(a) ten sensing elements and a processing element for simultaneously recording twelve ECG signals from the user during a first time interval and simultaneously recording twelve ECG signals from the user during a second time interval;

(b) a comparing element for analyzing said ECG signals by comparing each of said ECG signals recorded during said second time interval to a respective ECG signal recorded during said first time interval so as to provide twelve delta values of comparison; and

(c) a logical decision element, which, based on said analysis and comparison, serves for logically evaluating said comparison, making a logical decision and for providing a recommendation to the user of a step the user should take.

25. The device of claim 24, wherein said logical decision element, prior to, and for effecting making said logical decision and providing said recommendation, serves for analyzing a number of specific pairs of said delta values of comparison.

26. The device of claim 25, wherein said twelve ECG signals recorded during said first said second time intervals are I ECG signals, II ECG signals, III ECG signals, (AVR) ECG signals, (AVL) ECG signals, (AVF) ECG signals, V1 ECG signals, V2 ECG signals, V3 ECG signals, V4 ECG signals, V5 ECG signals and V6 ECG signals, and further wherein said specific pairs of said delta values of comparison are selected from the group consisting of delta values of said I ECG signals and said (AVL) ECG signals, delta values of said II ECG signals and said III ECG signals, delta values of said III ECG signals and said (AVF) ECG signals, delta values of said (AVF) ECG signals and said V1 ECG signals, delta values of said V1 ECG signals and said V2 ECG signals, delta values of said V2 ECG signals and said V3 ECG signals, delta values of said V3 ECG signals and said V4 ECG signals, delta values of said V4 ECG signals and said V5 ECG signals and delta values of said V5 ECG signals and said V6 ECG signals.

27. The device of claim 26, further comprising an instruction panel for instructing the user how to determine the user'"'"'s risk factor.

28. The device of claim 25, wherein said display element serves for asking the user a list of questions being related to the user'"'"'s medical status, and wherein making said logical decision and providing said recommendation to the user by said logical decision element is effected based on said answers to said questions.

29. The device of claim 24, wherein said processing element calculates an ECG parameter of each of said twelve ECG signals recorded during said first time interval and a respective ECG parameter of each of said twelve ECG signals recorded during said second time interval and wherein said twelve delta values are calculated by comparing said ECG parameters to said respective ECG parameters.

30. The device of claim 29, wherein said ECG parameters and said respective ECG parameters are selected from the group consisting of a ST level parameter derived from said ECG signals, a sign of a T-wave parameter derived from said ECG signals, an amplitude of a Q wave parameter derived from said ECG signals, a width of a Q wave parameter derived from said ECG signals, an amplitude of a R wave parameter derived from said ECG signals, a heart rate parameter derived from said ECG signals and a heart rhythm parameter derived from said ECG signals.

31. The device of claim 29, wherein said display element displays a question to the user for the user'"'"'s risk factor and said decision is made and said recommendation is given by said logical decision element based on said risk factor.

32. The device of claim 24, wherein said device includes a display element and a keyboard for interactively communicating with the user.

33. The device of claim 24, wherein said ten sensing elements are mechanically interconnected there amongst.

34. The device of claim 24, further comprising a stored information transferring element communicating with said processing element, so as to enable later analysis of said stored information.

35. The device of claim 24, further including elements for storing different personal codes for ECG examination, so as to enable ECG examination by different users.