Patent ID: 9020610
Filing Date: 2015-04-28
Classification: A61N

Abstract:
1. A lead for an implantable medical device, the lead comprising: a conductor; a first electrode electrically coupled to the conductor; and a second electrode electrically coupled to the conductor, wherein the second electrode comprises a conducting material and an insulating layer covering an outer portion of the conducting material such that the insulating material separates the entire outer portion of the conducting material of the second electrode from tissue when implanted, wherein the first and second electrodes coupled to the conductor form parallel conductive paths from the conductor to tissue when placed in contact with tissue, and wherein the first electrode and the second electrode are configured such that the second electrode carries more high frequency current than the first electrode when high frequency current at about 10 MHz or higher flows in the conductor and the first and second electrodes are placed in contact with tissue and such that the second electrode carries less low frequency current than the first electrode when low frequency current at frequencies below 5 KHz flows in the conductor and the first and second electrodes are placed in contact with tissue.