One button lid activated automatic external defibrillator

• US 5,797,969 A
• Filed: 01/09/1997
• Issued: 08/25/1998
• Est. Priority Date: 08/01/1995
• Status: Expired due to Term

• Current Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Original Assignee: SurVivaLink Corporation (Cardica Incorporated)
• Inventors: Anderson, Katherine H., Olson, Kenneth F., Gilman, Byron L.
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): LAYNO, CARL HERNANDZ
• Application Number:
  US08/781,185
• Time in Patent Office: 593 Days
• Field of Search: 607/5, 607/142
• US Class Current: 607/5
• CPC Class Codes: A61N 1/3904 External heart defibrillators [EHD]
• CPC Class Codes: A61N 1/3931 Protecting, e.g. back-up systems

Abstract

An automated external defibrillator which automatically performs self-tests on a daily and weekly basis. Tested functions include the presence and interconnection of defibrillator electrodes, battery charge state and the operability of the high voltage circuit. Visual and audible indicators are actuated to alert an operator if faults are identified. A record of each self-test is stored in memory, and can be subsequently retrieved through a communications port.

Claims

1. A one button method of applying a defibrillation shock to a patient using an automated external defibrillator (AED) having a case including an electrode compartment, a pair of electrodes stored within the electrode compartment, an openable lid covering the electrode compartment, a high voltage circuit, and an operator-actuated rescue switch, the method including the steps of:

opening the lid covering the electrode compartment to expose the electrodes therein wherein the electrodes are electrically connected to the AED prior to the opening of the lid and wherein the step of opening the lid causes the AED to be powered ON;

retrieving the electrodes stored in the compartment;

applying the electrodes to the patient;

pausing while the high voltage circuit charges; and

actuating the operator-actuating rescue switch a single time to apply a defibrillation shock to the patient via the electrodes.

2. The method as in claim 1 further including the step of opening a package containing the electrodes prior to the step of applying the electrodes to the patient.

3. The method as in claim 1 further including the step of peeling the electrodes from a releasable liner prior to the step of applying the electrodes to the patient.

4. The method of claim 1 wherein the step of opening the lid further causes the AED to perform a self-test.

5. An automated external defibrillator (AED) having a case and a lid and a pair of electrodes wherein the AED has a processor for performing initialization and self-checking functions including:

a) monitoring a lid switch;

b) powering ON the AED when the lid switch is activated;

c) initiating a rescue mode when the lid switch is activated;

d) initiating lid opened self-test when the lid switch is activated;

e) initiating a place electrode prompt;

f) monitoring the impedance of the electrodes;

g) initiating a check electrode prompt if the impedance does not fall within a preselected range;

h) beginning a first analyze sequence if the impedance falls within the preselected range;

i) generating a high voltage charge when a shockable rhythm is detected;

j) enabling an operator actuated button for release of a defibrillation shock; and

k) initiating a push button to rescue prompt.

6. The defibrillator of claim 5 wherein the rescue mode of function (c) further includes the functions of:

switching a maintenance indicator to a maintenance required stage;

and

flashing a rescue light.

7. The defibrillator as in claim 5 wherein the lid open self-test of function (d) further includes the functions of:

checking the charge state of batteries of the AED;

checking the interconnection and operability of the electrodes;

checking the state of a memory in the AED;

checking the functionality of a real time clock of the AED; and

checking the functionality of an analog to digital converter of the AED.

8. The defibrillator as in claim 5 wherein functions d, f and j are implemented using an audible voice prompt.

9. The defibrillator as in claim 5 wherein functions d, f and j are implemented using a visual prompt.

10. An automated external defibrillator (AED) having a case and a lid and a pair of electrodes wherein the AED has a processor for performing initialization and self-checking functions including:

a) monitoring a lid switch;

b) powering ON the AED when the lid switch is activated;

c) initiating a rescue mode when the lid switch is activated;

d) monitoring the impedance of the electrodes;

e) beginning a first analyze sequence if the impedance falls within the preselected range;

f) generating a high voltage charge when a shockable rhythm is detected; and

g) enabling an operator actuated button for release of a defibrillation shock.

11. The defibrillator of claim 10 wherein the rescue mode of function (c) further includes the functions of:

switching a maintenance indicator to a maintenance required stage; and

flashing a rescue light.

12. The defibrillator of claim 10 wherein the lid open self-test of function (d) further includes the functions of:

checking the charge state of batteries of the AED;

checking the interconnection and operability of the electrodes;

checking the state of a memory in the AED;

checking the functionality of a real time clock of the AED; and

checking the functionality of an analog to digital converter of the AED.

13. The defibrillator of claim 10 wherein functions d, f and j are implemented using an audible voice prompt.

14. The defibrillator of claim 10 wherein functions d, f and j are implemented using a visual prompt.

15. An automated external defibrillator (AED) having a case and a lid and a pair of electrodes wherein the AED has a processor for performing initialization and self-checking functions including:

a) monitoring a lid switch;

b) powering ON the AED when the lid switch is activated;

c) initiating a rescue mode when the lid switch is activated;

d) beginning a first analyze sequence;

e) generating a high voltage charge when a shockable rhythm is detected; and

f) enabling an operator actuated button for release of a defibrillation shock.

16. The defibrillator of claim 15 wherein the rescue mode of function (c) further includes the functions of:

switching a maintenance indicator to a maintenance required stage; and

flashing a rescue light.

17. The defibrillator of claim 15 wherein the lid open self-test of function (d) further includes the functions of:

checking the charge state of batteries of the AED;

checking the interconnection and operability of the electrodes;

checking the state of a memory in the AED;

checking the functionality of a real time clock of the AED; and

checking the functionality of an analog to digital converter of the AED.

18. The defibrillator of claim 15 wherein functions d, f and j are implemented using an audible voice prompt.

19. The defibrillator of claim 15 wherein functions d, f and j are implemented using a visual prompt.