Patent ID: 6671544
Filing Date: 2003-12-30
Classification: A61N

Abstract:
An implantable neurological stimulation system having a low impedance extension, comprising:an implantable neurostimulator including, a housing, a power supply carried in the housing, stimulation electronics coupled to the power supply and coupled to a connector block, and, a stimulation lead having a lead proximal end, a lead distal end and a lead body, the lead proximal end having at least one electrical contact and the lead distal end having at least one stimulation electrode, at least one lead conductor contained in the lead body electrically connecting the lead electrical contact and to the stimulation electrode; and a lead extension having an extension proximal end, an extension distal end and an extension body, the extension proximal end having at least one proximal contact coupleable to the implantable neurostimulator connector block and an extension distal end having at least one extension distal contact coupleable to the lead proximal contact, at least one extension conductor contained in the extension body electrically connecting the extension distal contact with the extension proximal contact, wherein the extension conductor is composed of an outer surface and an inner core, the outer surface having an outer impedance and the inner core having a core impedance that is substantially lower than the outer impedance, wherein the outer surface is stainless steel.