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Leads with high surface resistance

  • US 8,538,551 B2
  • Filed: 08/23/2012
  • Issued: 09/17/2013
  • Est. Priority Date: 12/06/2007
  • Status: Expired due to Fees
First Claim
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1. An implantable medical lead for use in a magnetic resonance imaging (MRI) environment, the lead comprising:

  • a lead having a proximal portion configured to be coupled to a pulse generator, a distal portion having an electrode, and a conductor wire that extends from the proximal portion to the distal portion to electrically connect with the electrode for conducting energy between the electrode and the pulse generator;

    the lead having a resistivity that increases across a width of the lead between a center portion of the conductor wire and an outer portion of the lead such that the resistivity is greatest at the outer surface of the lead; and

    wherein the outer portion of the lead is configured to dissipate RF electromagnetic energy received by an MRI device along a length of the lead.

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