Electrode surface modification for imparting current density directionality in lead electrodes
First Claim
1. An implantable medical lead, comprising:
- a lead body having a proximal section and a distal section; and
at least one electrode fabricated from an electrically conductive material and disposed on the distal section of the lead body, the at least one electrode including an active electrode portion and an inactive electrode portion, the active electrode portion configured to contact target tissue, the inactive electrode portion including a plurality of surface features formed in the electrically conductive material, the plurality of surface features configured to impart a current density directionality towards the active electrode portion.
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Accused Products
Abstract
An implantable medical lead having a modified electrode surface for imparting current density directionality within an electrode is disclosed. An implantable medical lead includes a lead body having a proximal section and a distal section having a pre-biased shape configured to secure the lead to an inner wall of a blood vessel. An electrode coupled to the distal section of the lead body includes a number of surface features on an inactive portion of the electrode that impart a current density directionality towards an active portion of the electrode that contacts the inner wall of the vessel. Methods for imparting current density directionality within an implantable lead electrode are also disclosed.
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Citations
20 Claims
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1. An implantable medical lead, comprising:
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a lead body having a proximal section and a distal section; and at least one electrode fabricated from an electrically conductive material and disposed on the distal section of the lead body, the at least one electrode including an active electrode portion and an inactive electrode portion, the active electrode portion configured to contact target tissue, the inactive electrode portion including a plurality of surface features formed in the electrically conductive material, the plurality of surface features configured to impart a current density directionality towards the active electrode portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An implantable medical lead, comprising:
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a lead body having a proximal section and a distal section, the distal section of the lead body having a pre-biased shaped configured to secure the lead to an inner wall of a blood vessel; and at least one annular-shaped electrode disposed on the distal section of the lead body, the at least one electrode including a conductor body having a first, active electrode section configured to contact the inner wall and a second, inactive electrode section, the second electrode section including a plurality of ridges formed from electrically conductive material of the electrode, the plurality of ridges configured to impart a current density directionality towards the first electrode section, the first active electrode section oriented on the lead body to be outward facing to contact a target tissue due to the pre-biased shaped of the lead body and the second inactive electrode section orientated on the lead body to be inward facing to not contact the target tissue due to the pre-biased shape of the lead body.
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14. A method for imparting current density directionality within an electrode of an implantable lead, the electrode fabricated from electrically conductive material, the method comprising:
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identifying an active electrode portion and an inactive electrode portion of the electrode; and selectively treating the inactive portion of the electrode to form a plurality of surface features from the electrically conductive material on the electrode, the plurality of surface features configured to impart a current density directionality within the electrode towards the active electrode portion. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification