External defibrillator with shock activated by cessation of precordial compressions

• US 9,168,385 B2
• Filed: 12/05/2003
• Issued: 10/27/2015
• Est. Priority Date: 12/13/2002
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Snyder, David
• Primary Examiner(s): Lavert, Nicole F
• Application Number:
  US10/537,792
• Publication Number:
  US 20060116724A1
• Time in Patent Office: 4,344 Days
• Field of Search: 607/5, 600/509, 601/41
• US Class Current: 1/1
• CPC Class Codes: A61B 5/30 Input circuits therefor
• CPC Class Codes: A61B 5/308 for electrocardiography [ECG]
• CPC Class Codes: A61B 5/361 Detecting fibrillation
• CPC Class Codes: A61B 5/7203 for noise prevention, reduction or removal
• CPC Class Codes: A61B 5/7207 of noise induced by motion artifacts
• CPC Class Codes: A61B 5/726 using Wavelet transforms
• CPC Class Codes: A61N 1/39044 in combination with cardiopulmonary resuscitation [CPR] therapy
• CPC Class Codes: A61N 1/3925 Monitoring; Protecting

Abstract

A defibrillator having a pair of electrodes for delivering an artifact-compensated defibrillation shock and a method thereof is provided. The defibrillator can be deployed rapidly while administering a cardio-pulmonary resuscitation (CPR) on the patient. Upon detection of an end of the CPR operation, a correlation signal indicative of signal corruption is detected and analyzed rapidly to determine an appropriate energy level discharged across the pair of electrodes. Thereafter, a notification signal is sent to the user of the defibrillator prior to delivering the defibrillation shock to the patient. The artifact-compensated defibrillation shock is delivered if for a predetermined period of time no movements is detected.

Claims

1. A method for delivering a defibrillation shock using a defibrillator, the method comprising the steps of:

(a) having the defibrillator initiate a cardio-pulmonary resuscitation (CPR) interval;

(b) prior to an end of the cardio-pulmonary resuscitation (CPR) interval, analyzing the ECG signal for signal corruption and, if a cessation or absence of CPR precordial compressions is indicated by substantially no signal corruption;

(c) analyzing an ECG signal prior to the end of the originally initiated cardio-pulmonary resuscitation (CPR) interval to determine if a defibrillation shock is needed; and

,

(d) delivering a defibrillation shock if the analyzing step (c) indicates that a defibrillation shock is needed.

2. The method of claim 1, wherein step (c) includes charging the defibrillator prior to the end of the originally initiated cardio-pulmonary resuscitation (CPR) interval.

3. The method of claim 1, wherein step (c) includes determining whether a disturbance associated with the cardio-pulmonary resuscitation (CPR) interval is detected;

and, if there is substantially no disturbance, delivering the defibrillation shock if needed.

4. The method of claim 1, further comprising the step of notifying an operator of the defibrillator prior to delivering the defibrillation shock.

5. The method of claim 1, wherein the defibrillation shock is provided about 10 seconds or less after the cessation of precordial compressions.

6. A method for delivering a defibrillation shock using a defibrillator, the method comprising the steps of:

prompting a start of a CPR therapy interval;

detecting an indication of CPR precordial compression cessation during the CPR therapy interval; and

,

arming the AED for defibrillation shock delivery based on the detected cessation of precordial compressions detected during the CPR therapy interval.

7. The method of claim 6, wherein the arming step is complete in less than about 10 seconds from detection of the cessation of precordial compressions.

8. The method of claim 6, wherein the indication is based upon a predetermined end of the CPR therapy interval.

9. The method of claim 8, wherein the arming step includes initiating a charging of the high voltage energy source prior to the predetermined end of the CPR therapy interval.

10. The method of claim 8, wherein the arming step includes completing a charging of a high voltage energy source of the defibrillator prior to the predetermined end of the CPR therapy interval.

11. The method of claim 8, further comprising the steps of:

obtaining an ECG signal from the ECG detector prior to the predetermined end of the CPR therapy interval; and

determining whether the ECG signal is corrupted by CPR activity, wherein the arming step is further based on determining an uncorrupted ECG signal.

12. The method of claim 6, wherein the indication of CPR cessation includes a signal generated by CPR activity.

13. The electrotherapy method of claim 12, further comprising the steps of:

obtaining an ECG signal from the ECG detector prior to the CPR cessation; and

determining whether the ECG signal is uncorrupted by CPR activity;

wherein the arming step is further based on the determining step.

14. A method for delivering a defibrillation shock using a defibrillator, the method comprising the steps of:

coupling a plurality of sensors to the patient'"'"'s body to detect physiological signals of the patient;

initiating a predetermined CPR therapy interval during which precordial compressions are to be administered to the patient;

monitoring a physiological signal received from at least one of the sensors to detect a cessation of precordial compression administration prior to the end of the predetermined CPR therapy interval;

upon detecting a cessation of precordial compression administration prior to the end of the predetermined therapy interval, obtaining ECG signals from a plurality of the sensors;

analyzing the obtained ECG signals to determine whether a defibrillation shock is needed; and

if the analyzing step determines that a defibrillation shock is needed, delivering a defibrillation shock to the patient through a plurality of the sensors.

15. The method of claim 14, wherein one of the sensors detects a signal indicative of patient movement due to CPR motion,

wherein the signal indicative of patient movement is used in the detecting step.

16. The method of claim 14, wherein one of the sensors detects a signal indicative of ECG signal corruption from CPR activity,

wherein the signal indicative of ECG signal corruption is used in the detecting step.

17. The method of claim 14, further comprising the step of initiating charging of a high voltage energy source prior to the predetermined end of the predetermined CPR therapy interval.