Electrode application system and method for electroconvulsive therapy

• US 4,870,969 A
• Filed: 09/16/1988
• Issued: 10/03/1989
• Est. Priority Date: 09/16/1988
• Status: Expired due to Term

• Current Assignee: Somatics Incorporated
• Original Assignee: Somatics Incorporated
• Inventors: Swartz, Conrad M.
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US07/245,355
• Time in Patent Office: 382 Days
• Field of Search: 128/419 S, 128/640, 128/798, 128/802, 128/803
• US Class Current: 607/45
• CPC Class Codes: A61N 1/0408 Use-related aspects
• CPC Class Codes: A61N 1/0452 Specially adapted for transcutaneous muscle stimulation [TMS]
• CPC Class Codes: A61N 1/0492 Patch electrodes A61N1/0412, A61N1/0428 take precedence
• CPC Class Codes: A61N 1/38 for producing shock effects

Abstract

A medical method and system in electroconvulsive therapy (ECT) uses a disposable electrode, which does not use a liquid, such as conductive gel or saline solution. The electrode is a flexible multi-layer pad having an adhesive surface which is covered by a removable cover sheet. The pad comprises a layer of adhesive non-liquid conductive hydrogel, a thin conductive plastic film layer, a conductive metal foil layer connected to a wire lead, and an insulative plastic layer, preferably a plastic foam.

Claims

1. The system in electroconvulsive therapy (ECT) including:

an ECT instrument means which, under operator control, produces a burst of electrical waves sufficient to induce a seizure in the brain of a human patient;

a one-use disposable connector-pad assembly comprising a connector plug portion removably electrically connected to said ECT instrument means, a flexible multi-layer laminated electrode pad and a wire connected to said plug portion;

said pad applying said electrical waves to the skin of the patient and including an adhesive conductive layer which is a plastic conductive film having first and second surfaces, a metal foil layer electrically connected to said wire and covering said adhesive layer second surface, an insulative layer covering said metal foil layer; and

a cover layer removably covering said adhesive layer first surface;

wherein said wire is a multi-strand wire of at least three metal strands and said strands at their ends are separated, extend across and are electrically connected to the said metal foil layer.

2. The ECT system of claim 1 wherein said insulative layer is a plastic film.

3. The ECT system of claim 1 wherein said foil is aluminum foil.

4. The ECT system of claim 1 wherein said adhesive layer is a non-flowing electrolyte low impedance hydrogel.

5. The ECT system of claim 1 wherein said cover layer is a plastic film.

6. The ECT system of claim 1 and including an output wire connected to said ECT instrument means, and a second plug portion connected to said output wire and removably plugged into said plug portion of said connector-pad assembly.

7. The method, in electroconvulsive therapy, using an ECT instrument, of stimulating the brain of a patient with electrical energy of high current density sufficient to induce seizure in the patient, including the steps of:

forming a pad assembly by laminating together a conductive adhesive layer of a plastic conductive film and having a first and a second surface, a flexible conductive metal foil layer covering said second surface having spread across said foil a plurality of at least three separated strands of multi-strand wire, and an insulative layer covering the metal foil layer, said pad assembly having a cover sheet removably covering said first surface;

joining the wire at its end opposite the foil layer to an electrical connector plug;

arranging the patient for the therapy, removing the cover sheet from the adhesive layer;

adhering the adhesive layer to the skin of the patient at the head, connecting the connector plug to the ECT instrument;

treating the patient by applying electric current to the head of the patient from the ECT instrument through the adhesive layer, foil layer, multi-strand wire, and the connector plug; and

after said treatment peeling the adhesive layer from the skin and disposing of the cover sheet and the pad assembly.