Cardio-pulmonary resuscitation device with feedback from measurement of pulse and/or blood oxygenation

• US 20040267324A1
• Filed: 06/27/2003
• Published: 12/30/2004
• Est. Priority Date: 06/27/2003
• Status: Active Grant

• Current Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Original Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Inventors: Geheb, Frederick, Boucher, Donald R.
• Granted Patent: US 7,190,999 B2
• Time in Patent Office: Days
• US Class Current: 607/5
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• 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 5/11 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 5/1102 Ballistocardiography
• CPC Class Codes: A61B 5/145 Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissuemeasuring of blood pressure or blood flow A61B5/02; non-radiation detecting or locating of foreign bodies in blood A61B5/06
• CPC Class Codes: A61B 5/318 Heart-related electrical modalities, e.g. electrocardiography [ECG]
• CPC Class Codes: A61B 5/6833 Adhesive patches
• CPC Class Codes: A61B 5/7455 characterised by tactile indication, e.g. vibration or electrical stimulation
• CPC Class Codes: A61H 2031/002 fixed on the chest by adhesives
• CPC Class Codes: A61H 2201/5007 computer controlled
• 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 2201/5061 Force sensors
• CPC Class Codes: A61H 2201/5071 Pressure sensors
• 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 2230/06 Heartbeat rate
• CPC Class Codes: A61H 2230/207 partial O2-value
• CPC Class Codes: A61H 31/005 : with feedback for the user
• CPC Class Codes: A61H 31/007 : Manual driven
• CPC Class Codes: A61N 1/39 : Heart defibrillators
• CPC Class Codes: A61N 1/3925 : Monitoring; Protecting
• CPC Class Codes: G16H 15/00 : ICT specially adapted for medical reports, e.g. generation or transmission thereof
• CPC Class Codes: G16H 40/63 : for local operation
• CPC Class Codes: H01H 2215/004 : Collapsible dome or bubble

Abstract

An apparatus for assisting a rescuer in performing CPR on a victim. The apparatus comprising at least one of a pulse sensor for measuring the pulse rate of the victim and an SpO2 sensor for measuring blood oxygenation; electronics for processing the output of the sensor or sensors and determining one or more actions that the rescuer should perform to improve the CPR being performed; and a prompting device for conveying the one or more actions to the rescuer.

Claims

1. Apparatus for assisting a rescuer in performing CPR on a victim, the apparatus comprising:

at least one of a pulse sensor for measuring the pulse rate of the victim and an SpO2 sensor for measuring blood oxygenation;

electronics for processing the output of the sensor or sensors and determining one or more actions that the rescuer should perform to improve the CPR being performed; and

a prompting device for conveying the one or more actions to the rescuer.

2. The apparatus of claim 1 further comprising an external defibrillator.

3. The apparatus of claim 1 wherein the apparatus comprises an SpO2 sensor but not a pulse sensor.

4. The apparatus of claim 1 wherein the apparatus comprises a pulse sensor but not an SpO2 sensor.

5. The apparatus of claim 1 further comprising a chest compression sensor.

6. The apparatus of claim 5 wherein the chest compression sensor is an acclerometer.

7. The apparatus of claim 1 wherein the electronics is provided with information on compression rate.

8. The apparatus of claim 7 wherein the compression rate is sensed or derived from a chest compression sensor.

9. The apparatus of claim 1 wherein the prompting device comprises a device that conveys a desired rate of compression to the rescuer.

10. The apparatus of claim 9 wherein the device that conveys a desired rate of compression to the rescuer comprises a metronome.

11. The apparatus of claim 1 wherein the prompting device comprises a speaker and associated electronics for conveying audible instructions.

12. The apparatus of claim 1 wherein the electronics comprises a digital computer executing computer software.

13. The apparatus of claim 1 wherein the electronics compares compression rate to a desired CPR rate.

14. The apparatus of claim 1 wherein the electronics compares a measured level of blood oxygenation to a desired level.

15. The apparatus of claim 1 wherein the electronics provides a prompt instructing the rescuer to release from the chest during CPR delivery if the sensors indicate that the rescuer is not adequately releasing from the chest

16. The apparatus of claim 1 wherein the electronics provides a prompt to the user to press harder if the pulse sensor indicates that there is no measured pulse rate.

17. The apparatus of claim 1 wherein the electronics provides a prompt to press harder if the sensor indicate that a pulse is detected but SpO2 is below a defined level.

18. The apparatus of claim 1 wherein the electronics provides a prompt to increase compression rate if the sensors indicate that a pulse is detected, that chest compressions are at a defined level, and that SpO2 is still below a defined level.

19. The apparatus of claim 1 wherein the electronics provides prompts to increase compression rate and compression pressure simultaneously based on measurements from sensors.

20. The apparatus of claim 1 wherein the electronics provides a prompt for the user to interrupt chest compressions to give one or more breaths.

21. The apparatus of claim 20 wherein the prompt to give one or breaths is issued when sensor measurements show that blood circulation is occurring and that the cause of a falling SpO2 level may be an increase in metabolism.

22. The apparatus of claim 1 wherein the electronics provide a prompt to continue CPR without interruption for breathing based on SpO2 levels that were above a given threshold so as to ensure that there would be no break in circulation when blood oxygen levels remained high and ventilation was not yet required.