Defibrillator display

• US 9,289,134 B2
• Filed: 09/29/2014
• Issued: 03/22/2016
• Est. Priority Date: 02/12/2010
• Status: Active Grant

• Current Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Original Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Inventors: Tan, Qing, Freeman, Gary A., Geheb, Frederick J., Bures, Martin E., Silver, Annemarie
• Primary Examiner(s): EVANISKO, GEORGE ROBERT
• Application Number:
  US14/499,617
• Publication Number:
  US 20150018695A1
• Time in Patent Office: 540 Days
• Field of Search: 607 3- 6
• US Class Current: 1/1
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• 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 5/082 Evaluation by breath analysis, e.g. determination of the chemical composition of exhaled breath A61B5/083, A61B5/091 take precedence
• CPC Class Codes: A61B 5/0836 Measuring rate of CO2 production
• CPC Class Codes: A61B 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: A61B 5/14542 for measuring blood gases A61B5/14551 takes precedence
• CPC Class Codes: A61B 5/25 Bioelectric electrodes therefor
• CPC Class Codes: A61B 5/28 for electrocardiography [ECG]
• CPC Class Codes: A61B 5/318 Heart-related electrical modalities, e.g. electrocardiography [ECG]
• CPC Class Codes: A61B 5/339 Displays specially adapted therefor
• CPC Class Codes: A61B 5/7282 Event detection, e.g. detecting unique waveforms indicative of a medical condition A61B5/4094, A61B5/4818, A61B5/349, A61B5/0823 take precedence
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence
• CPC Class Codes: A61B 5/746 Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms alarms per se G08B
• CPC Class Codes: A61H 2201/5076 Frequency sensors
• CPC Class Codes: A61H 2201/5084 Acceleration sensors
• CPC Class Codes: A61H 2230/04 Heartbeat characteristics, e.g. E.G.C., blood pressure modulation
• CPC Class Codes: A61H 2230/205 partial CO2-value
• CPC Class Codes: A61H 2230/207 partial O2-value
• CPC Class Codes: A61H 2230/30 Blood pressure A61H2230/04 takes precedence
• CPC Class Codes: A61H 31/005 with feedback for the user
• CPC Class Codes: A61N 1/046 : Specially adapted for shock therapy, e.g. defibrillation
• CPC Class Codes: A61N 1/0492 : Patch electrodes A61N1/0412, A61N1/0428 take precedence
• CPC Class Codes: A61N 1/3925 : Monitoring; Protecting
• CPC Class Codes: A61N 1/3931 : Protecting, e.g. back-up systems
• CPC Class Codes: A61N 1/3937 : Monitoring output parameters
• CPC Class Codes: A61N 1/3975 : Power supply A61N1/378 takes precedence
• CPC Class Codes: A61N 1/3981 : High voltage charging circuitry
• CPC Class Codes: A61N 1/3987 : characterised by the timing or triggering of the shock
• CPC Class Codes: A61N 1/3993 : User interfaces for automatic external defibrillators
• CPC Class Codes: G09B 19/003 : Repetitive work cycles; Sequence of movements
• CPC Class Codes: G09B 23/288 : for artificial respiration or heart massage
• CPC Class Codes: G16H 20/30 : relating to physical therapies or activities, e.g. physiotherapy, acupressure or exercising
• CPC Class Codes: G16H 20/40 : relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture
• CPC Class Codes: G16H 40/63 : for local operation
• CPC Class Codes: G16H 50/00 : ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
• CPC Class Codes: G16Z 99/00 : Subject matter not provided for in other main groups of this subclass

Abstract

Systems and methods related to the field of cardiac resuscitation, and in particular to devices for assisting rescuers in performing cardio-pulmonary resuscitation (CPR) are described herein.

Claims

1. A method for monitoring patient activity using an external defibrillator, the method comprising:

receiving information about the patient'"'"'s heart activity;

obtaining data regarding chest compressions performed on the patient;

determining values for depth and rate of a plurality of the chest compressions;

displaying on a graphical display screen of the defibrillator, indications of the determined values for depth and rate and an electrocardiogram trace of the patient'"'"'s heart activity;

wherein displaying the electrocardiogram trace of the patient'"'"'s heart activity comprises displaying an unfiltered electrocardiogram showing compression artifacts, sensing that the chest compressions have commenced on the patient, and displaying a filtered electrocardiogram that filters said chest compression artifacts, and displaying on the graphical display screen of the defibrillator an indication of whether the electrocardiogram is the unfiltered electrocardiogram or the filtered electrocardiogram.

2. The method of claim 1, wherein determining the values for depth and rate comprises determining numeric values in terms of distance for depth and compressions per minute for rate, and wherein displaying the indications of the determined values for depth and rate comprises displaying numbers that correspond to the determined numeric values.

3. The method of claim 1, further comprising displaying an indication adjacent the indications of the determined values that indicates whether the chest compressions are being performed properly.

4. The method of claim 3, wherein the indication of whether chest compressions are being performed properly is an indicator comprising a shape with the amount of fill in the shape differing based upon the measured rate and depth of compression.

5. The method of claim 4, wherein the shape is fully filled when the depth and rate of compression fall within acceptable ranges.

6. The method of claim 4, wherein the shape is partly filled when the depth and/or rate of compression fall below acceptable ranges.

7. The method of claim 3, wherein the indication of whether chest compressions are being performed properly is an icon.

8. The method of claim 3, wherein a color of the indication changes based on whether the chest compressions are being performed properly or improperly.

9. The method of claim 1, wherein displaying the electrocardiogram trace comprises displaying the electrocardiogram trace laterally across the display.

10. The method of claim 1, further comprising displaying second data from the patient in coordination with the electrocardiogram.

11. The method of claim 10, further comprising changing a source of the second data in response to sensing that chest compressions have commenced on the patient.

12. The method of claim 11, further comprising determining values for SPO₂.

13. The method of claim 12, further comprising determining values for CO₂.

14. The method of claim 13, wherein changing the source of the second data comprises changing from displaying SPO₂ values to displaying CO₂ values.

15. The method of claim 11, further comprising determining values for a chemical in the patient.

16. The method of claim 15, wherein changing the source of the second data comprises changing from displaying values of measurements of a chemical in a patient to displaying the chest compression data.

17. The method of claim 16, wherein the chest compression measurement is displayed in the form of a bar graph.

18. The method of claim 17, wherein lengths of bars in the bar graph represent compression depths and spacing of bars in the bar graph represent compression rate.

19. The method of claim 18, further comprising displaying indicators for standard depth and rate with the bar graph.

20. The method of claim 1, wherein obtaining the data regarding chest compressions performed on the patient comprises obtaining measurements from an accelerometer that is positioned to move in coordination with the patient'"'"'s breastbone.

21. The method of claim 20, wherein determining a value for depth comprises double integrating measurements from the accelerometer.

22. The method of claim 20, wherein the accelerometer is attached to a housing that is in turn attached to a pair of defibrillator electrodes to be placed on the patient.

23. The method of claim 1, further comprising determining values for CO₂.

24. The method of claim 1, further comprising providing a visual or audible indication to a rescuer providing chest compressions when the user does not fully release their hands from the patient'"'"'s chest between chest compressions.

25. An external defibrillator comprising:

a graphical display screen;

one or more electrodes for receiving information about a patient'"'"'s heart activity;

one or more sensors for obtaining data regarding chest compressions performed on the patient; and

a processor programmed or configured to;

determine values for depth and rate of a plurality of the chest compressions from data obtained by the one or more sensors; and

cause the graphical display screen of the defibrillator to display indications of the determined values for depth and rate and an electrocardiogram trace of the patient'"'"'s heart activity,

wherein displaying the electrocardiogram trace of the patient'"'"'s heart activity comprises displaying an unfiltered electrocardiogram showing compression artifacts, sensing that the chest compressions have commenced on the patient, and displaying a filtered electrocardiogram that filters said chest compression artifacts, and displaying on the graphical display screen of the defibrillator an indication of whether the electrocardiogram is the unfiltered electrocardiogram or the filtered electrocardiogram.

26. The defibrillator of claim 25, wherein determining the values for depth and rate comprises determining numeric values in terms of distance for depth and compressions per minute for rate, and wherein displaying the indications of the determined values for depth and rate comprises displaying numbers that correspond to the determined numeric values.

27. The defibrillator of claim 25, wherein the processor is further programmed or configured to cause the graphical display screen to display an indication adjacent the indications of the determined values that indicates whether the chest compressions are being performed properly.

28. The defibrillator of claim 27, wherein the indication of whether chest compressions are being performed properly is an indicator comprising a shape with the amount of fill in the shape differing based upon the measured rate and depth of compression.

29. The defibrillator of claim 28, wherein the shape is fully filled when the depth and rate of compression fall within acceptable ranges.

30. The defibrillator of claim 28, wherein the shape is partly filled when the depth and/or rate of compression fall below acceptable ranges.

31. The defibrillator of claim 27, wherein the indication of whether chest compressions are being performed properly is an icon.

32. The defibrillator of claim 27, wherein a color of the indication changes based on whether the chest compressions are being performed properly or improperly.

33. The defibrillator of claim 25, wherein displaying the electrocardiogram trace comprises displaying the electrocardiogram trace laterally across the display.

34. The defibrillator of claim 25, wherein the processor is further programmed or configured to cause the graphical display screen to display second data from the patient in coordination with the electrocardiogram.

35. The defibrillator of claim 34, wherein the processor is further programmed or configured to change a source of the second data in response to sensing that chest compressions have commenced on the patient.

36. The defibrillator of claim 35, wherein the defibrillator further comprises a sensor for detecting one or more gas components and the processor is further programmed or configured to determine values for SPO₂.

37. The defibrillator of claim 36, wherein the processor is further configured or programmed to determine values for CO₂.

38. The defibrillator of claim 37, wherein changing the source of the second data comprises changing from displaying SPO₂ values to displaying CO₂ values.

39. The defibrillator of claim 35, wherein the defibrillator further comprises a sensor for detecting one or more chemicals in the patient and the processor is further programmed or configured to determine values for one or more chemicals in the patient.

40. The defibrillator of claim 39, wherein changing the source of the second data comprises changing from displaying values of measurements of a chemical in a patient to displaying the chest compression data.

41. The defibrillator of claim 40, wherein the chest compression measurement is displayed in the form of a bar graph.

42. The defibrillator of claim 41, wherein lengths of bars in the bar graph represent compression depths and spacing of bars in the bar graph represent compression rate.

43. The defibrillator of claim 42, wherein the processor is further programmed or configured to display indicators for standard depth and rate with the bar graph.

44. The defibrillator of claim 25, wherein the defibrillator further comprises an accelerometer and wherein obtaining the data regarding chest compressions performed on the patient comprises obtaining measurements from the accelerometer that is positioned to move in coordination with the patient'"'"'s breastbone.

45. The defibrillator of claim 44, wherein determining a value for depth comprises double integrating measurements from the accelerometer.

46. The defibrillator of claim 44, wherein the accelerometer is attached to a housing that is in turn attached to a pair of defibrillator electrodes to be placed on the patient.

47. The defibrillator of claim 25, wherein the defibrillator further comprises a sensor for detecting one or more gas components and the processor is further programmed or configured to determine values for CO₂.

48. The defibrillator of claim 25, wherein the processor is further programmed or configured to cause the graphical display screen to provide a visual or audible indication to a rescuer providing chest compressions when the user does not fully release their hands from the patient'"'"'s chest between chest compressions.