Leads with high surface resistance
First Claim
Patent Images
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.
0 Assignments
0 Petitions
Accused Products
Abstract
Implantable medical leads having resistance characteristics adapted to dissipate radio frequency (RF) electromagnetic energy during medical procedures such as magnetic resonance imaging (MRI) are disclosed. An illustrative medical device includes a lead having an inner electrical conductor operatively coupled to an electrode and a pulse generator, and one or more outer resistive shields that radially surround the inner conductor and dissipate RF energy into the surrounding body tissue along the length of the lead.
-
Citations
20 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. 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 conductor wire having a resistivity that increases across a width of the conductor wire between a center portion of the conductor wire and an outer portion of the conductor wire such that the resistivity is greatest at the outer portion of the conductor wire; and wherein the outer portion of the conductor wire is configured to dissipate RF electromagnetic energy received by an MRI device. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification