# US 6,720,497 B1 · Electrode cable for electrical stimulation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 6,720,497 B1 - Document ID: US6720497B1 - Status: Granted - Kind: B1 - Application number: 09/254,605 - Filed: 1999-06-08 - Granted: 2004-04-13 - Earliest claimed: 1996-09-12 - Assignees: Pacesetter, Inc. - Inventors: Måns Barsne - Web page: https://patentgrep.com/patent/US6720497B1 ## CPC - A61N 1/056: {Transvascular endocardial electrode systems} - H01B 7/065: {having the shape of an helix} - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) ## Abstract A medical electrode cable has an exterior, tubular insulating sheath containing a number of side-by-side wires arranged substantially parallel to the sheath and helically proceeding around and,along a longitudinal axis. At least one of the wires is a low-resistivity conductor, and at least two of the wires are high-resistivity conductors. All of the wires have equal diameters. The low-resistivity conductor is a wire having a core of a low-resistivity material encased in an exterior jacket of the same high-resistivity material which forms the high-resistivity conductors. ## Claims ### Claim 1 A medical electrode cable having a longitudinal axis, comprising: an exterior, tubular insulating sheath; a plurality of wires disposed side-by-side substantially parallel to said sheath and forming a wire set, said wire set extending helically around and along said longitudinal axis; one of said plurality of wires in said wire set consisting of a low-resistive conductor; at least two of said plurality of wires in said wire set respectively consisting of high-resistive conductors, each of said high-resistive conductors consisting of a same high-resistivity material; all wires in said plurality of wires having equal respective diameters; and said low-resistive conductor being a wire consisting of a core exclusively of a low-resistivity material encased in an exterior jacket exclusively of said high-resistivity material. ### Claim 2 (depends on 1) A medical electrode cable as claimed in claim 1 having a first end adapted for connection to a medical electrical stimulation device, and a second end having an electrode for delivering stimulation energy from said medical stimulation device, said stimulation energy being conducted through said medical electrode cable by said wire set. ### Claim 3 (depends on 1) A medical electrode cable as claimed in claim 1 wherein said wire set has a first end and a second end, and further comprising a first wire connector disposed at said first end and a second wire connector disposed at said second end, said first and second wire connectors each establishing an electrical connection among all of said plurality of wires in said wire set. ### Claim 4 (depends on 3) A medical electrode cable as claimed in claim 3 wherein each of said first and second wire connectors comprise a metallic clamp disposed in direct surface contact with said low-resistive conductor and at least one of said high-resistive conductors. ### Claim 5 (depends on 3) A medical electrode cable as claimed in claim 3 wherein each of said first and second wire connectors comprise a plurality of joints electrically connecting side-by-side wires in said wire set, said joints being selected from the group consisting of soldered joints and welded joints. ### Claim 6 (depends on 1) A medical electrode cable as claimed in claim 1 wherein said high-resistivity material comprises a cobalt alloy, and wherein said low-resistivity material comprises a material selected from the group consisting of silver, gold, aluminum, copper and platinum. ### Claim 7 (depends on 6) A medical electrode cable as claimed in claim 6 wherein said low-resistive conductor has a total conductor volume, and wherein said outer jacket of said low-resistivity conductor comprises a portion of said total conductor volume in a range between 65% and 80%. ### Claim 8 (depends on 1) A medical electrode cable as claimed in claim 1 wherein said wire set encompasses a hollow interior extending entirely along said longitudinal axis. ### Claim 9 (depends on 8) A medical electrode cable as claimed in claim 8 wherein said plurality of wires comprise a first plurality of wires and wherein said wire set comprises a first wire set, said medical electrode cable further comprising: an interior, tubular insulating sheath disposed in said interior volume and extending along said longitudinal axis; and a second plurality of wires disposed side-by-side substantially parallel to and inside said interior sheath, said second plurality of wires forming a second wire set extending helically around and along said longitudinal axis coaxially with said first wire set. ### Claim 10 (depends on 9) A medical electrode cable as claimed in claim 9 wherein said second wire set also includes one wire comprising a low-resistive conductor and at least two wires comprising respective high-resistive conductors, with each of the high-resistive conductors in said second wire set being comprised of said high-resistivity material and said low-resistive conductor in said second wire set having a core of said low-resistivity material encased in an exterior jacket comprised of said high-resistivity material. ### Claim 11 (depends on 10) A medical electrode cable as claimed in claim 10 wherein said second wire set has a hollow interior proceeding entirely along said longitudinal axis forming a channel having a size adapted to admit a stylet unit. ### Claim 12 (depends on 9) A medical electrode cable as claimed in claim 9 wherein each wire in said first plurality of wires forming said first wire set and each wire in said second plurality of wires forming said second wire set has a diameter in a range between 0.05 and 0.20 mm. ### Claim 13 (depends on 1) A medical electrode cable as claimed in claim 1 wherein each wire in said plurality of wires forming said wire set has a diameter in a range between 0.05 and 0.20 mm.