Stacy A Mattson

US Patent:

50872419, Feb 11, 1992

Filed:

Jul 24, 1990

Appl. No.:

7/558250

Inventors:

George E. Mathiesen - Inver Grove Heights MN
Stacy D. Mattson - Anoka MN

Assignee:

Empi, Inc. - St. Paul MN

International Classification:

A61N 130

US Classification:

604 20

Abstract:

An iontophoresis electrode configured for positioning on a patient's skin during a drug treatment. The electrode includes a flexible backing layer having a first surface with an adhesive layer for holding the electrode together and for securing the electrode to the skin. A conductive material layer adheres to the adhesive layer. An absorbent pad layer, positioned adjacent the conductive material layer, holds a drug solution during the treatment. A dispersive material layer overlies the absorbent pad layer to disperse the solution evenly about a skin-electrode interface. The dispersive material layer and the flexible backing layer enclose the conductive material layer and the absorbent pad layer. A plurality of radially oriented slits extend through the conductive material layer at an aperture in the adhesive backing layer to form a site at which the drug solution can be injected into the absorbent pad layer. A snap-type electrical contact is attached to the conductive material layer.