Automated resuscitation device with ventilation sensing and prompting

• US 20070219588A1
• Filed: 03/17/2006
• Published: 09/20/2007
• Est. Priority Date: 03/17/2006
• Status: Active Grant

• Current Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Original Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Inventors: Freeman, Gary
• Granted Patent: US 7,747,319 B2
• Time in Patent Office: Days
• US Class Current: 607/5
• 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 2201/5071 Pressure sensors
• CPC Class Codes: A61H 2201/5084 Acceleration sensors
• CPC Class Codes: A61H 2230/40 Respiratory characteristics
• CPC Class Codes: A61H 31/005 with feedback for the user
• CPC Class Codes: A61H 31/007 Manual driven
• CPC Class Codes: A61M 16/021 operated by electrical means A61M16/202 – A61M16/205 take precedence
• CPC Class Codes: A61M 16/04 Tracheal tubes catheters in general A61M25/00
• CPC Class Codes: A61M 16/0411 with means for differentiating between oesophageal and tracheal intubation
• CPC Class Codes: A61M 16/0488 Mouthpieces; Means for guiding, securing or introducing the tubes guiding or introducing with laryngoscopes A61B1/267; holding devices on the body A61M25/02
• CPC Class Codes: A61M 2016/0015 inhalation detectors
• CPC Class Codes: A61M 2016/0027 pressure meter
• CPC Class Codes: A61M 2016/003 with a flowmeter
• CPC Class Codes: A61M 2205/332 Force measuring means
• CPC Class Codes: A61M 2205/505 Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2205/587 : Lighting arrangements
• CPC Class Codes: A61M 2230/42 : Rate
• CPC Class Codes: A61N 1/39 : Heart defibrillators
• CPC Class Codes: A61N 1/39044 : in combination with cardiopulmonary resuscitation [CPR] therapy
• CPC Class Codes: A61N 1/3925 : Monitoring; Protecting
• CPC Class Codes: A61N 1/3937 : Monitoring output parameters
• CPC Class Codes: A61N 1/3993 : User interfaces for automatic external defibrillators

Abstract

A device for assisting a caregiver in delivering cardiac resuscitation to a patient, the device comprising a user interface configured to deliver prompts to a caregiver to assist the caregiver in delivering cardiac resuscitation to a patient; at least one sensor configured to detect the caregiver'"'"'s progress in delivering the cardiac resuscitation, wherein the sensor is configured to provide a signal containing information indicative of ventilation; a memory in which a plurality of different prompts are stored, including at least one ventilation progress prompt to guide the rescuer'"'"'s performance of ventilation; a processor configured to process the output of the sensor to determine a parameter descriptive of ventilation progress and to determine whether the ventilation progress prompt should be selected for delivery. Possible parameters descriptive of ventilation progress include ventilation rate, delivered tidal volume, and flow rate.

Claims

1. A device for assisting a caregiver in delivering cardiac resuscitation to a patient, the device comprising

a user interface configured to deliver prompts to a caregiver to assist the caregiver in delivering cardiac resuscitation to a patient;

at least one sensor configured to detect the caregiver'"'"'s progress in delivering the cardiac resuscitation, wherein the sensor is configured to provide a signal containing information indicative of ventilation;

a memory in which a plurality of different prompts are stored, including at least one ventilation progress prompt to guide the rescuer'"'"'s performance of ventilation;

a processor configured to process the output of the sensor to determine a parameter descriptive of ventilation progress and to determine whether the ventilation progress prompt should be selected for delivery.

2. The device of claim 1 wherein the parameter descriptive of ventilation progress is ventilation rate, and the ventilation progress prompt comprises an instruction pertaining to varying the ventilation rate.

3. The device of claim 1 wherein the parameter descriptive of ventilation progress is delivered tidal volume, and the ventilation progress prompt comprises an instruction pertaining to varying the delivered tidal volume.

4. The device of claim 1 wherein the parameter descriptive of ventilation progress is flow rate, and the ventilation progress prompt comprises an instruction pertaining to varying the flow rate.

5. The device of claim 2 wherein the sensor comprises an accelerometer, and the processor processes the output of the accelerometer to distinguish between ventilations and chest compressions.

6. The device of claim 1 wherein the sensor comprises a pressure sensor, and the processor processes the output of the pressure sensor to determine the parameter descriptive of ventilation progress.

7. The device of claim 1 wherein there are a plurality of other sensors configured to detect the caregiver'"'"'s progress in delivering the cardiac resuscitation, wherein each of the plurality of sensor is other than an electrode connected to the body.

8. The device of claim 1 wherein the processor is configured to vary the time at which prompts are delivered based on the progress detected by the sensor.

9. The device of claim 1 further may comprise one or more additional sensors configured to detect the caregiver'"'"'s progress in delivering the therapy, wherein the one or more additional sensors comprise an electrode in electrical contact with the body.

10. The device of claim 1 wherein the processor selects a series of more detailed prompts for delivery to a user when progress is slower than a predetermined pace.

11. The device of claim 1 wherein the processor is configured to slow down the rate at which prompts are delivered when progress is slower than a predetermined pace.

12. The device of claim 1 wherein the user interface delivers at least some of the prompts as oral instructions to be heard by the caregiver.

13. The device of claim 1 wherein the user interface delivers at least some of the prompts as visual instructions to be seen by the caregiver.

14. The device of claim 13 wherein the user interface comprises an electronic display.

15. The device of claim 14 wherein the electronic display provides a series of images.

16. The device of claim 1 further comprising an automatic external defibrillator.

17. The device of claim 12 wherein the oral prompts are associated with a series of graphics and are given sequentially to guide the caregiver through a sequence of steps.

18. The device of claim 13, wherein the visual prompts are delivered as a series of graphics with the sequential illumination of light sources to guide the caregiver through the sequence of graphics.

19. A device of claim 1 further comprising a processing system that measures and records the times required for a user to complete a sequence of steps and/or sub-steps in a protocol, and, based on the measured times adjusts the rate of the prompting delivered.

20. A device of claim 19 wherein the adjusting is based on a comparison of the measured times with a set of stored values.

21. An automatic external defibrillation device for delivering defibrillation shocks to a patient and for assisting a caregiver in delivering cardiac resuscitation to the patient, the device comprising

an electrode pad supporting at least one defibrillation electrode, the pad being configured to be adhesively applied to the chest of the patient;

at least one pressure sensor configured to detect information relating to the caregiver'"'"'s delivery of ventilations to the patient;

wherein at least a portion of the pressure sensor is mounted on the electrode pad;

a processor configured to process the output of the pressure sensor to determine a parameter descriptive of ventilation progress.

22. The device of claim 21 wherein the parameter descriptive of ventilation progress is ventilation rate, and the ventilation progress prompt comprises an instruction pertaining to varying the ventilation rate.

23. The device of claim 21 wherein the parameter descriptive of ventilation progress is delivered tidal volume, and the ventilation progress prompt comprises an instruction pertaining to varying the delivered tidal volume.

24. The device of claim 21 wherein the parameter descriptive of ventilation progress is flow rate, and the ventilation progress prompt comprises an instruction pertaining to varying the flow rate.

25. The device of claim 21 wherein at least one tube runs from the pressure sensor on the electrode pad to an adapter configured to be positioned in the vicinity of the patient'"'"'s mouth, and the tube and adapter are configured so that a pressure associated with ventilations is conveyed through the tube to the pressure sensor on the electrode pad assembly.

26. The device of claim 25 further comprising a second tube running from the pressure sensor to the adapter, and the adapter and tubes are configured to measure a differential pressure associated with ventilations.

27. The device of claim 21 further comprising at least one indicator light on the electrode pad assembly to convey information about delivered ventilations.

28. The device of claim 27 wherein the information comprises whether ventilation rate is within a predetermined range of acceptable ventilation rates.

29. The device of claim 27 wherein the information comprises an indication of the delivered tidal volume.

30. A device for assisting a caregiver in delivering cardiac resuscitation to a patient, the device comprising

a user interface configured to deliver prompts to a caregiver to assist the caregiver in delivering cardiac resuscitation to a patient;

at least two sensors configured to provide signals from which information can be derived on the placement of an ET tube in the patient;

a memory in which a plurality of different prompts are stored, including at least a first ET tube placement prompt providing a first indication as to the placement of the ET tube;

a processor configured to process the outputs of the sensors to determine the ET tube placement and to determine whether the first ET tube placement prompt should be delivered.

31. The device of claim 30 wherein the first ET tube placement prompt comprises a prompt indicating that the ET tube is not correctly placed in the patient'"'"'s trachea.

32. The device of claim 30 wherein the sensors comprise a pressure sensor configured to detect the timing of ventilations delivered to the ET tube and an accelerometer configured to detect sternal motion in the patient.

33. The device of claim 30 wherein the sensors comprise a pressure sensor configured to detect the timing of ventilations delivered to the ET tube and a TTI sensor configured to detect changes in the transthoracic impedance of the patient.

34. The device of claim 30 wherein one of the sensors is configured to detect the timing of ventilations delivered to the ET tube, another of the sensors is configured to detect the timing of sternal movement in the patient or of change in transthoracic impedance of the patient, and the processor is configured to compare the relative timing of ventilations and sternal movements or transthoracic impedance changes.