Semiconductor low-threshhold electrode

Details Semiconductor low-threshhold electrode Semiconductor low-threshhold electrode

1981-03-30

1982-10-05

Cohen, Lee S.

Surgery

Truss

Pad

128419P, A61N 104

Patent

active

043523609

ABSTRACT:
An electrode for a body implantable lead having a semiconductor surface for the coupling of electrical signals to the body tissue. A first approach uses several materials of differing conductivities. These materials are arranged in layers such that the material having the lowest conductivity is in direct contact with body tissue. The layers are then added in increasing order of conductivity. The intersection of two materials may be abrupt or may be a smooth transition fashioned by a combination of the two materials. The second approach provides an abrupt transition from the highly conductive materials within the lead body to a semiconductor material having direct exposure to the body tissue. The conductor within the body implantable lead is preferably fabricated using drawn brazed strand coils arranged in multifilar fashion. The conductor coils are insulated using a polyurethane sheath.

REFERENCES:
patent: 3533403 (1970-10-01), Woodson
patent: 3994302 (1976-11-01), Brennen
patent: 4281668 (1981-08-01), Richter et al.
Non-Polarizable Vitreous Carbon Pacing Electrodes in Animal Experiments, by Richter, Weidlich, Sturm, David, Brandt, Elmqvist and Thoren, "The Structure of Polymers", Section 13--Electrical Properties, Conductance in Polymers, pp. 671-683.

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