Aed Having Mandatory Pause for Administrating Cpr

• US 20080215103A1
• Filed: 06/13/2006
• Published: 09/04/2008
• Est. Priority Date: 06/24/2005
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Powers, Daniel J.
• Granted Patent: US 9,795,799 B2
• Time in Patent Office: Days
• US Class Current: 607/7
• CPC Class Codes: A61N 1/3925 Monitoring; Protecting
• CPC Class Codes: A61N 1/3987 characterised by the timing or triggering of the shock

Abstract

A system and method are described for delivering electrotherapy to a patient that includes delivering electrotherapy to defibrillate the patient and providing at least one non-interruptible time period for administration of CPR prior to entering a monitor mode during which a patent cardiac signal is monitored for indication of a shockable rhythm.

Claims

1. A method for providing electrotherapy, comprising:

analyzing a cardiac signal for a shockable rhythm;

delivering electrotherapy from a high-voltage energy source if a shockable rhythm exists;

pausing for a non-interruptible CPR period after analyzing the cardiac signal;

re-analyzing the cardiac signal for a shockable rhythm; and

monitoring the cardiac signal without precharging the high-voltage energy source.

2. The method of claim 1 wherein pausing for a non-interruptible CPR period is preceded by a determination that no shock is advised, and monitoring the cardiac signal is preceded by a second determination that no shock is advised.

3. The method of claim 1, further comprising precharging the high-voltage energy source during the non-interruptible CPR period.

4. The method of claim 3, further comprising discharging the high-voltage energy source in response to not detecting a shockable rhythm from re-analyzing the cardiac signal.

5. The method of claim 2 wherein pausing for the non-interruptible CPR period occurs in response to a first determination that a shockable rhythm does not exist and wherein monitoring the cardiac signal occurs in response to a second consecutive determination that a shockable rhythm does not exist.

6. The method of claim 1, further comprising monitoring the cardiac signal in response to a determination that a shockable rhythm does not exist and a heart rate in excess of a predetermined value is identified, and pausing for a non-interruptible CPR period in response to a determination that a shockable rhythm does not exist and a heart rate less than the predetermined value is identified.

7. In an automatic external defibrillator (AED), a method for providing electrotherapy to a patient, comprising:

analyzing the patient ECG to determine if delivery of electrotherapy is advised;

delivering electrotherapy to the patient if electrotherapy is advised;

for a first occurrence of electrotherapy not advised, pausing for a uninterruptible time period to allow administration of CPR;

analyzing the patient ECG to determine if delivery of electrotherapy is advised; and

for a second occurrence of electrotherapy not advised, monitoring the patient ECG for indication of a shockable rhythm.

8. The method of claim 7, further comprising preparing the AED for delivery of electrotherapy during the uninterruptible time period.

9. The method of claim 8, wherein monitoring the patient ECG further comprises deferring preparing the AED for delivery of electrotherapy until indication of a shockable rhythm.

10. The method of claim 7 wherein the first occurrence of electrotherapy not advised occurs after delivery of electrotherapy to the patient.

11. A method for delivering electrotherapy to a patient, comprising:

delivering electrotherapy to defibrillate the patient; and

providing at least one non-interruptible time period for administration of CPR prior to entering a monitor mode during which a patent cardiac signal is monitored for indication of a shockable rhythm.

12. The method of claim 11 wherein the non-interruptible time period is provided following delivery of a series of consecutive electrotherapeutic shocks to the patient.

13. The method of claim 11 wherein the non-interruptible time period terminates after passage of a pre-determined period of time.

14. The method of claim 11 wherein the non-interruptible time period is provided following determination that delivery of electrotherapy is not advised.

15. An automatic external defibrillator (AED), comprising:

a cardiac signal analyzer;

a monitoring mode of operation;

a CPR pause mode of operation that cannot be terminated by detection of a shockable rhythm; and

a controller for selecting one of the monitoring mode and the CPR pause mode based on an output from the cardiac signal analyzer.

16. The AED of claim 15 wherein the cardiac signal analyzer comprises a cardiac signal analyzer operable to analyze an ECG signal for shockable rhythm.

17. The AED of claim 16 wherein the controller comprises a controller operable to select the CPR pause mode in response to the cardiac signal analyzer providing an output indicating the absence of a shockable rhythm at a first instance and to select the monitoring mode in response to the cardiac signal analyzer providing an output indicating the absence of a shockable rhythm at a second instance.

18. The AED of claim 16 wherein the controller comprises a controller operable to select the CPR pause mode of operation at least once prior to selecting the monitoring mode of operation.

19. The AED of claim 16, further comprising a high-energy delivery circuit operable to deliver electrotherapy and wherein the controller comprises a controller operable to prepare the high-energy delivery circuit for delivery of electrotherapy during the CPR pause mode of operation.

20. The AED of claim 19 wherein the controller comprises a controller further operable to delay preparation of the high-energy delivery circuit for delivery of electrotherapy during the monitoring mode prior to detection of a shockable rhythm.