Biomedical electrode having skin-equilibrating adhesive at its perimeter and method for using same

• US 5,947,961 A
• Filed: 05/10/1996
• Issued: 09/07/1999
• Est. Priority Date: 05/10/1996
• Status: Expired due to Term

• Current Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Original Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Inventors: Netherly, Samuel G.
• Primary Examiner(s): RUDDY, DAVID M
• Application Number:
  US08/644,798
• Time in Patent Office: 1,215 Days
• Field of Search: 128/640, 128/641, 128/643, 128/644, 606/32, 606/35, 607/149, 607/152, 607/153, 600/373-392
• US Class Current: 606/32
• CPC Class Codes: A61B 18/16 Indifferent or passive electrodes for grounding

Abstract

A biomedical electrode is disclosed, having a geometry of a perimeter of hydrophilic adhesive exceeding the perimeter of an area containing electrically conductive plate(s). The geometry unexpectedly causes a reduction in edge effect for dispersive electrodes and cardiac stimulation electrodes due the substantial equilibration of the conductive adhesive with epidermis of a patient the electrode contacts for a period of time sufficient to cause such substantial equilibration.

Claims

1. A method of using a biomedical electrode having at least one electrically conductive plate having a perimeter, and having a field of hydrophilic adhesive such that the perimeter of the hydrophilic adhesive exceeds the perimeter of the electrically conductive plate(s), comprising the steps of;

(a) placing the biomedical electrode on epidermis of a mammalian body; and

(b) permitting water content in the hydrophilic adhesive of the electrode to substantially equilibrate with water content in the epidermis of the mammalian body to alter impedance characteristics of the epidermis.

2. The method of claim 1, wherein the permitting step results in absorption of water from the epidermis into the hydrophilic adhesive.

3. The method of claim 1, further comprising a step (c) of peeling back a portion of the biomedical electrode after the step (b) is completed.