Audible alarm system for an automated external defibrillator

• US 5,955,956 A
• Filed: 04/08/1998
• Issued: 09/21/1999
• Est. Priority Date: 04/08/1997
• Status: Expired due to Term

• Current Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Original Assignee: SurVivaLink Corporation (Cardica Incorporated)
• Inventors: Stendahl, Gary B., Welsch, Michael D.
• Primary Examiner(s): Lee, Benjamin C.
• Application Number:
  US09/057,026
• Time in Patent Office: 531 Days
• Field of Search: 340/635, 340/637, 340/638, 340/657, 607/5, 607/6, 607/142, 607/8, 206/438, 206/701, 327/36
• US Class Current: 340/635
• CPC Class Codes: A61N 1/3904 External heart defibrillators [EHD]

Abstract

The audible alarm system of the present invention incorporates an alarm condition indicator that is designed to detect an alarm condition within the AED. The audible alarm system further incorporates an audible alarm circuit that is connected to the alarm condition indicator and is designed to produce an audible alarm. The audible alarm circuit is initially activated by the alarm condition indicator and then operates independently of the alarm condition after the initial activation.

Claims

1. An audible alarm system for an automated external defibrillator (AED), comprising:

an alarm condition indicator designed to detect an alarm condition within the AED; and

an audible alarm circuit, operable on a power level of less than 5 volts from a power source wherein said power level is less than the operating power level of the alarm condition indicator from the power source, connected to said alarm condition indicator and designed to produce an audible alarm through an external audible alarm port, said audible alarm circuit initially activated by said alarm condition indicator, and wherein said audible alarm circuit operates independently of said alarm condition indicator after the initial activation.

2. The audible alarm system of claim 1, wherein said alarm condition indicator comprises a processor.

3. The audible alarm system of claim 1, wherein said alarm condition indicator comprises a watch dog timer.

4. The audible alarm system of claim 1, wherein said alarm condition indicator detects said alarm condition during a lid closed self-test.

5. The audible alarm system of claim 1, wherein said alarm condition indicator detects said alarm condition during a periodic self-test.

6. The audible alarm system of claim 5, wherein said alarm condition indicator detect said alarm condition during a daily self-test.

7. The audible alarm system of claim 5, wherein said alarm condition indicator detect said alarm condition during a weekly self-test.

8. The audible alarm system of claim 1, wherein said audible alarm circuit is connected to a speaker.

9. The audible alarm system of claim 1, wherein said audible alarm circuit is connected to a piezoelectric alarm.

10. The audible alarm system of claim 1, wherein said alarm condition is selected from the group consisting of:

a processor malfunction, a real-time clock malfunction, an analog-to-digital converter malfunction, a program memory malfunction, a data memory malfunction, an event memory malfunction and a high voltage generation circuit malfunction.

11. The audible alarm system of claim 1, wherein the audible alarm circuit is operable on approximately 3.3 volts.

12. An audible alarm system for an automated external defibrillator (AED), comprising:

an alarm condition indicator designed to detect an alarm condition within the AED and to require a first amount of power from a power source for operation; and

an audible alarm circuit designed to produce an audible alarm, said audible alarm circuit coupled to said alarm condition indicator, said audible alarm circuit designed to be initially activated by said alarm condition indicator, operate independently of said alarm condition indicator after the initial activation, and require a second amount of power from the power source for operation that is less than said first amount of power, where said second amount of power requires less than 5 volts.

13. The audible alarm system of claim 12, wherein said alarm condition indicator is a processor.

14. The audible alarm system of claim 12, wherein said alarm condition indicator is a watch dog timer.

15. The audible alarm system of claim 12, wherein said alarm condition indicator detects alarm conditions during a lid closed self-test performed by the AED.

16. The audible alarm system of claim 12, wherein said alarm condition indicator detects alarm conditions during a daily self-test performed by the AED.

17. The audible alarm system of claim 12, wherein said alarm condition indicator detects alarm conditions during a weekly self-test performed by the AED.

18. The audible alarm system of claim 12, wherein said audible alarm circuit is connected to a speaker port formed in the housing of the AED.

19. The audible alarm system of claim 12, wherein said alarm condition is selected from the group consisting of:

a processor malfunction, a real-time clock malfunction, an analog-to-digital converter malfunction, a program memory malfunction, a data memory malfunction, an event memory malfunction and a high voltage generation circuit malfunction.

20. The audible alarm system of claim 12, wherein said second amount of power requires approximately 3.3 volts.

28. The audible alarm system of claim 19, wherein said audible alarm circuit is connected to a piezoelectric alarm.

21. An audible alarm system for an automated external defibrillator (AED), comprising:

a processor designed to detect an alarm condition within the AED;

a watch dog timer coupled to said processor, said watch dog timer designed to detect a processor alarm condition; and

an audible alarm circuit, operable on a power level of less than 5 volts from a power source wherein said power level is less than the operating power level of the processor and the watch dog timer from the power source, designed to produce an audible alarm, said audible alarm circuit coupled to said processor and said watch dog timer, said watch dog timer and said processor designed to initially actuate said audible alarm circuit upon detection of an alarm condition, and wherein said audible alarm circuit operates independently of said processor and said watch dog timer after its initial activation.

22. The audible alarm system of claim 21, wherein a power source is a battery removably mounted to the AED.

23. The audible alarm system of claim 21, wherein said processor is adapted to detect alarm conditions during a lid closed self-test of the AED.

24. The audible alarm system of claim 21, wherein said processor is adapted to detect alarm conditions during a daily self-test of the AED.

25. The audible alarm system of claim 21, wherein said processor is adapted to detect alarm conditions during a weekly self-test of the AED.

26. The audible alarm system of claim 21, wherein said audible alarm circuit is connected to a speaker port formed in a housing of the AED.

27. The audible alarm system of claim 21, wherein said alarm condition is selected from the group consisting of:

a processor malfunction, a real-time clock malfunction, an analog-to-digital converter malfunction, a program memory malfunction, a data memory malfunction, an event memory malfunction and a high voltage generation circuit malfunction.

29. The audible alarm system of claim 21, wherein the audible alarm circuit is operable on approximately 3.3 volts.