Automated resuscitation device with ventilation sensing and prompting

• US 9,375,381 B2
• Filed: 01/04/2010
• Issued: 06/28/2016
• 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 A.
• Primary Examiner(s): GETZOW, SCOTT M
• Application Number:
  US12/651,556
• Publication Number:
  US 20100106208A1
• Time in Patent Office: 2,367 Days
• Field of Search: 607 4- 9, 600/483, 600/484, 600/513, 600529-543, 12820024-20718
• US Class Current: 1/1
• 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 providing ventilations to a patient, the device comprising

a user interface configured to deliver prompts to the caregiver to assist the caregiver in providing the ventilations;

a first sensor configured to detect a parameter representative of air volume delivered to the patient during the ventilations;

a second sensor configured to detect a parameter representative of lung inflation;

a memory in which a plurality of different prompts are stored, including at least one ET tube placement prompt to guide the rescuer in placement of the ET tube for ventilation;

a processor configured to process the outputs of the first and second sensors to determine whether the ET tube is properly placed for ventilation by comparing the parameter representative of air volume delivered to the parameter representative of lung inflation, and configured to initiate delivery of one or more prompts indicating whether or not the ET tube is properly placed.

2. The device of claim 1 wherein the first sensor comprises an airway pressure sensor.

3. The device of claim 2 wherein the airway pressure sensor comprises a differential pressure sensor configured to measure tidal volume.

4. The device of claim 1 wherein the second sensor comprises an accelerometer positioned to detect a chest rise consistent with lung inflation.

5. The device of claim 1 wherein the second sensor comprises a transthoracic impedance sensor positioned to detect a rise in transthoracic impedance consistent with lung inflation.

6. The device of claim 1 wherein a pulse in the output of the first sensor represent a delivery of air to the patient, and a pulse in the output of the second sensor represents inflation of the lungs, and the processor compares the times of occurrence of the two pulses to determine whether the delivered air has gone to the lungs or to the esophagus, and to determine what prompt to deliver to the patient.

7. The device of claim 6 wherein the first sensor comprises an airway pressure sensor, and the second sensor comprises either an accelerometer or a transthoracic impedance sensor.