Disposable stimulation electrode with long shelf life and improv

Surgery – Truss – Pad

Patent

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Details

128802, A61N 104

Patent

active

049795171

ABSTRACT:
A flexible, disposable stimulation electrode (10) having low current densities and a long shelf life is disclosed. The electrode (10) includes a nonconducting backing layer (12). A tinfoil plate (16) is displaced inwardly from the edge of the backing layer (12), in contact with a skin-facing surface of the backing layer (12). A conductive gel (18) covers the exposed surface of the plate of the plate (16) and a portion of the skin-facing surface of the backing layer (12) that surrounds the plate (16). The gel (18) is formed by a mixture comprising: an ultraviolet radiation (UV) curable resin; a magnesium bromide electrolyte; and, a thioglycerol chain transfer agent. The resin is a urethane-acrylic oligomer made UV curable by the addition of a water-miscible photoinitiator. The gel (18) has an annular tapered edge (52) extending outwardly from the plate (16). The electrode (10) is adhered to a patient's skin by a hypoallergenic adhesive (32) that covers the entire skin-facing surface of the backing layer 12, including the skin-contacting surface (56) of the backing layer (12) that surrounds the gel (18); and, by the surface tack of the gel (18). An electrode post (42), connected to a radially extended arm (48) of the plate (16) and, extending through the backing layer (12), is used to connect the plate (16) to a medical electrode lead. A protective liner (54) is releasably attached to a skin-facing side of the electrode (10).

REFERENCES:
patent: 3998215 (1976-12-01), Anderson et al.
patent: 4554924 (1985-11-01), Engel
patent: 4580339 (1986-04-01), Toffe
patent: 4674512 (1987-06-01), Rolf
patent: 4736752 (1988-04-01), Munck et al.
Williams, C. R. et al., Analysis of the Current-Density Distribution from a Tapered, Gelled-Pad External Cardiac Pacing Electrode, Medical Instrumentation, vol. 21, No. 6, Dec., 1987, pp. 329-334.

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