Electrode triad for external defibrillation

• US 6,134,479 A
• Filed: 02/03/1999
• Issued: 10/17/2000
• Est. Priority Date: 07/09/1998
• Status: Expired due to Term

• Current Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Original Assignee: SurVivaLink Corporation (Cardica Incorporated)
• Inventors: Brewer, James E., Swerdlow, Charles D., Olson, Kenneth F.
• Primary Examiner(s): EVANISKO, GEORGE ROBERT
• Application Number:
  US09/243,579
• Time in Patent Office: 622 Days
• Field of Search: 607/5, 607/67, 607/142, 607/115, 607/152, 607/148
• US Class Current: 607/142
• CPC Class Codes: A61N 1/046 Specially adapted for shock therapy, e.g. defibrillation
• CPC Class Codes: A61N 1/0492 Patch electrodes A61N1/0412, A61N1/0428 take precedence

Abstract

An energy delivery system for use with an automatic external defibrillator (AED), the AED having a case containing a plurality of AED components, a battery electrically coupled to a control system, the control system communicatively coupled to a charge system, the charge system for generating a stored quantity of energy responsive to a communication from the control system, the control system selectively commanding a discharge of the stored energy to an electrical connector, the energy delivery system includes three electrodes, each electrode for making electrical contact with a skin surface of a patient, each electrode being in electrical contact with the electrical connector for communicating the stored energy to the patient. A method of defibrillating the heart of a patient using an AED, the AED having electrical energy discharge circuitry for generating a defibrillating energy discharge to affect the heart of the patient, the heart being in a state of fibrillation, includes the steps of placing three electrodes on the person of a patient to define a desired electrical path and discharging electrical energy across the electrical path.

Claims

1. An energy delivery system for use with an automatic external defibrillator (AED), the AED having a case containing a plurality of AED components, the AED components including at least a battery, a control system, a charge system, and an electrical connector, the battery electrically coupled to the control system, the control system communicatively coupled to the charge system, the charge system for generating a stored quantity of energy responsive to a communication from the control system, the control system selectively commanding a discharge of the stored energy to the electrical connector, the energy delivery system comprising:

three electrodes, each electrode being separable for making spaced apart electrical contact with a skin surface of a patient, each electrode being electrically connectable with the electrical connector for communicating the stored energy to the patient, each of the three electrodes having a patient engaging, electrically-conductive hydrogel layer;

a package, a first electrode of the three electrodes being maintained in the package, the package including a release liner substantially overlying the patient engaging, electrically-conductive hydrogel layer of the first electrode; and

a second electrode and a third electrode of the three electrodes being maintained in the package, the package including a second release liner substantially interposed between the patient engaging, electrically-conductive hydrogel layers of the second electrode and the third electrode of the three electrodes.

2. The energy delivery system of claim 1 wherein the release liner substantially interposed between the patient engaging, electrically-conductive hydrogel layers of the second electrode and the third electrode of the three electrodes forms an electrical connection between the second electrode and the third electrode.

3. The AED of claim 2 wherein the first electrode and the second electrode are substantially electrically isolated when disposed in the package.