Automated external defibrillator with the ability to sense temperature

• US 5,897,576 A
• Filed: 04/08/1998
• Issued: 04/27/1999
• 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: Olson, Kenneth F., Stendahl, Gary B., Tvedt, Michael A., Welsch, Michael D.
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): SCHAETZLE, KENNEDY
• Application Number:
  US09/057,412
• Time in Patent Office: 384 Days
• Field of Search: 607/5, 607/6, 607/7, 607/63, 607/33, 607/34, 607/27, 607/29
• US Class Current: 607/5
• CPC Class Codes: A61N 1/3904 External heart defibrillators [EHD]
• CPC Class Codes: A61N 1/3925 Monitoring; Protecting

Abstract

The AED of the present invention has a housing and a removable power supply, contained within its own power supply case, that is connected to a circuit for generating a defibrillation pulse. The circuit is electrically connectale to a pair of electrodes for delivering the defibrillation pulse. the AED further includes a temperature sensing device that is mounted inside the power supply case and connected to the power supply. The temperature sensing device senses the temperature in the power supply case and enables the adjustment of the operating parameters of the AED according to the sensed temperature.

Claims

1. An automated external defibrillator (AED) having a housing and a power supply wherein the power supply is connected to a circuit for generating a defibrillation pulse and wherein the circuit is electrically connectable to a pair of electrodes, wherein the AED has expected operating parameters, wherein the AED further includes a temperature sensing device mounted within said AED and wherein the temperature sensing device is connected to the power supply for sensing the temperature in the power supply and for enabling adjustment of the operating parameters according to the sensed temperature.

2. The AED of claim 1, wherein the temperature sensing device comprises a temperature sensing circuit incorporating a temperature sensor.

3. The AED of claim 1, wherein the power supply comprises a removable, nonrechargeable battery.

4. The AED of claim 1, wherein the operating parameters comprise a charging characteristic and wherein the charging characteristic is adjusted according to the temperature sensed by said temperature sensing device.

5. The AED of claim 1, wherein the operating parameters comprise a self-test routine and wherein the self-test routine is adjusted according to the temperature sensed by said temperature sensing device.

6. The AED of claim 5, wherein the self-test routine comprises an electrode self-test portion and wherein the electrode self-test portion of the self-test routine is enabled or disabled according to the temperature sensed by said temperature sensing device.

7. The AED of claim 1, wherein said temperature sensing device is mounted inside a power supply case.

8. An automated external defibrillator (AED) with the ability to sense temperature, the AED having a housing and a battery that is connected to a circuit for generating a defibrillation pulse and wherein the circuit is electrically connectable to a pair of electrodes, the AED having expected operating parameters, and wherein the AED further comprises:

a temperature sensing system internal to the AED, the system comprising a temperature sensing circuit electrically interfaced to the battery and to a processor, wherein the temperature sensing circuit is designed to sense the temperature of the battery and the processor is designed to enable adjustment of the operating parameters according to the sensed temperature.

9. The AED of claim 8, wherein the operating parameters comprise a charging characteristic and wherein the charging characteristic is adjusted according to the temperature sensed by said temperature sensing circuit.

10. The AED of claim 8, wherein the operating parameters comprise a self-test routine and wherein the self-test routine is adjusted according to the temperature sensed by said temperature sensing circuit.

11. The AED of claim 10, wherein the self-test routine comprises an electrode self-test portion and wherein the electrode self-test portion of the self-test routine is enabled or disabled according to the temperature sensed by said temperature sensing circuit.

12. The AED of claim 8, wherein said temperature sensing system is internal to a battery case.

14. The AED of claim 12, wherein the operating parameters comprise a charging characterstic and wherein the charging characteristic is adjusted according to the temperature sensed by said temperature sensing circuit.

15. The AED of claim 12, wherein the operating parameters comprise a self-test routine and wherein the self-test routine is adjusted according to the temperature sensed by said temperature sensing circuit.

16. The AED of claim 15, wherein the self-test routine comprises an electrode self-test portion and wherein the electrode self-test portion of the self-test routine is enabled or disabled according to the temperature sensed by said temperature sensing circuit.

13. An automated external defibrillator (AED) with the ability to sense temperature comprising:

an AED housing;

a battery proximate to the housing;

a temperature sensing circuit having a temperature sensor, said temperature sensing circuit located adjacent to said battery and temperature sensing circuit designed to sense the temperature inside of said battery; and

a processor interfaced to said temperature sensing circuit, said processor designed to enable adjustment of operating parameters of the AED according to the sensed temperature.