Method and apparatus for enhancement of chest compressions during CPR

• US 10,058,477 B2
• Filed: 12/07/2016
• Issued: 08/28/2018
• Est. Priority Date: 11/06/2003
• Status: Active Grant

• Current Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Original Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Inventors: Freeman, Gary A., Tan, Qing, Geheb, Frederick J.
• Primary Examiner(s): Gedeon, Brian T
• Application Number:
  US15/371,982
• Publication Number:
  US 20170196768A1
• Time in Patent Office: 629 Days
• Field of Search: None
• 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 5/11 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 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/316 Modalities, i.e. specific diagnostic methods
• CPC Class Codes: A61B 5/346 Analysis of electrocardiograms
• CPC Class Codes: A61B 5/361 Detecting fibrillation
• CPC Class Codes: A61B 5/4836 Diagnosis combined with treatment in closed-loop systems or methods A61B5/0036 takes precedence
• CPC Class Codes: A61B 5/4848 Monitoring or testing the effects of treatment, e.g. of medication
• 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: A61H 2201/5043 Displays
• CPC Class Codes: A61H 2201/5048 Audio interfaces, e.g. voice or music controlled
• CPC Class Codes: A61H 2201/5058 Sensors or detectors
• CPC Class Codes: A61H 2201/5079 Velocity 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 31/005 with feedback for the user
• CPC Class Codes: A61H 31/006 Power driven
• CPC Class Codes: A61H 31/007 Manual driven
• 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 1/3987 : characterised by the timing or triggering of the shock
• CPC Class Codes: A61N 1/3993 : User interfaces for automatic external defibrillators

Abstract

An apparatus for assisting a rescuer in performing chest compressions during CPR on a victim, the apparatus comprising a pad or other structure configured to be applied to the chest near or at the location at which the rescuer applies force to produce the chest compressions, at least one sensor connected to the pad, the sensor being configured to sense movement of the chest or force applied to the chest, processing circuitry for processing the output of the sensor to determine whether the rescuer is substantially releasing the chest following chest compressions, and at least one prompting element connected to the processing circuitry for providing the rescuer with information as to whether the chest is being substantially released following chest compressions.

Claims

1. An apparatus for assisting a rescuer in performing chest compressions on a patient, the apparatus comprising:

a conductor configured to be positioned adjacent to a first location of the thorax of the patient during resuscitation;

a magnet configured to be positioned adjacent to a second location of the thorax of the patient during resuscitation, the first and second locations being on substantially opposite sides of the thorax;

processing circuitry configured to process signals arising from relative motion between the magnet and the conductor to estimate displacement of the chest during resuscitation; and

a feedback device operatively connected to the processing circuitry and configured to provide an indication to a rescuer of the estimated displacement of the chest during resuscitation.

2. The apparatus of claim 1, wherein the first location comprises an anterior location of the thorax and the second location comprises a posterior location of the thorax.

3. The apparatus of claim 2, further comprising a first pad or other structure configured to be applied to the anterior location of the thorax of the patient near or at the location at which the rescuer applies force to produce the chest compressions.

4. The apparatus of claim 3, wherein the conductor is mechanically connected to the first pad or other structure.

5. The apparatus of claim 4, further comprising a second pad or other structure configured to be applied to the posterior location of the thorax of the patient.

6. The apparatus of claim 5, wherein the magnet is mechanically connected to the second pad or other structure.

7. The apparatus of claim 1, wherein the first location comprises a posterior location of the thorax and the second location comprises an anterior location of the thorax.

8. The apparatus of claim 7, further comprising a first pad or other structure configured to be applied to the anterior location of the thorax of the patient near or at the location at which the rescuer applies force to produce the chest compression.

9. The apparatus of claim 8, wherein the conductor is mechanically connected to the first pad or other structure.

10. The apparatus of claim 9, further comprising a second pad or other structure configured to be applied to the posterior location on the patient'"'"'s thorax.

11. The apparatus of claim 10, wherein the magnet is mechanically connected to the second pad or other structure.

12. The apparatus of claim 1, wherein the magnet and the conductor are configured to sense relative motion of surfaces of the first and second locations of the thorax.

13. The apparatus of claim 1, wherein the processing circuitry is configured to process electromagnetic signals arising from the relative motion between the magnet and the conductor to estimate chest compression depth during resuscitation.

14. The apparatus of claim 13, wherein the feedback device is configured to provide an indication to the rescuer as to whether compressions are within desired limits of compression depth.

15. The apparatus of claim 14, wherein the feedback device comprises a display configured to deliver a visual indication to the rescuer.

16. The apparatus of claim 15, wherein the display is configured to provide an indication to the rescuer as to whether compressions are within desired limits of compression depth.

17. The apparatus of claim 1, wherein the magnet and the conductor comprise a velocity sensor.

18. The apparatus of claim 1, wherein the feedback device is mechanically connected to at least one of the conductor and the magnet.

19. The apparatus of claim 18, further comprising a housing comprising the at least

one of the conductor and the magnet, the housing including the feedback device.

20. An apparatus for assisting a rescuer in performing chest compressions on a patient, the apparatus comprising:

first pad or other structure configured to be applied to an anterior location of the thorax of the patient near or at the location at which the rescuer applies force to produce the chest compressions,

a conductor mechanically connected to the first pad or other structure;

a second pad or other structure configured to be applied to a posterior location of the thorax of the patient, the anterior and posterior locations being on substantially opposite sides of the thorax;

a magnet mechanically connected to the second pad or other structure;

processing circuitry configured to process electromagnetic signals arising from relative motion between the magnet and the conductor to estimate chest compression depth during resuscitation; and

a feedback device operatively connected to the processing circuitry and configured to provide an indication to a rescuer of the estimated displacement of the chest during resuscitation.

21. The apparatus of claim 20, wherein the magnet and the conductor are configured to sense relative motion of surfaces of the first and second locations of the thorax.

22. The apparatus of claim 20, wherein the feedback device is configured to provide an indication to the rescuer as to whether compressions are within desired limits of compression depth.

23. The apparatus of claim 22, wherein the feedback device comprises a display configured to deliver a visual indication to the rescuer.

24. The apparatus of claim 23, wherein the display is configured to provide an indication to the rescuer as to whether compressions are within desired limits of compression depth.

25. The apparatus of claim 20, wherein the magnet and the conductor comprise a velocity sensor.

26. An apparatus for assisting a rescuer in performing chest compressions on a patient, the apparatus comprising:

first pad or other structure configured to be applied to a posterior location of the thorax of the patient near or at the location at which the rescuer applies force to produce the chest compressions;

a conductor mechanically connected to the first pad or other structure;

a second pad or other structure configured to be applied to an anterior location of the thorax of the patient, the anterior and posterior locations being on substantially opposite sides of the thorax;

a magnet mechanically connected to the second pad or other structure;

processing circuitry configured to process electromagnetic signals arising from relative motion between the magnet and the conductor to estimate chest compression depth during resuscitation; and

a feedback device operatively connected to the processing circuitry and configured to provide an indication to a rescuer of the estimated displacement of the chest during resuscitation.

27. The apparatus of claim 26, wherein the magnet and the conductor are configured to sense relative motion of surfaces of the first and second locations of the thorax.

28. The apparatus of claim 26, wherein the feedback device is configured to provide an indication to the rescuer as to whether compressions are within desired limits of compression depth.

29. The apparatus of claim 28, wherein the feedback device includes a display configured to deliver a visual indication to the rescuer.

30. The apparatus of claim 29, wherein the display is configured to provide an indication to the rescuer as to whether compressions are within desired limits of compression depth.