Patent ID: 7551966
Filing Date: 2009-06-23
Classification: A61N,H01B

Abstract:
1. An electromagnetic interference immune defibrillation lead, comprising: a first electromagnetic insulating layer; a first electromagnetic blocking layer, formed on said first electromagnetic insulating layer, said first electromagnetic blocking layer being composed of first conductive material deposited in strips forming a continuous spiraling coil of first loops, each first loop having a first width and length with non-conductive strips disposed therebetween each having said first length and a second width being narrower than said first width; a second electromagnetic insulating layer formed on said first electromagnetic blocking layer; a second electromagnetic blocking layer, formed on said second electromagnetic insulating layer, said second electromagnetic blocking layer being composed of second conductive material deposited in strips forming a continuous spiraling coil of second loops, each second loop having said first width and length with non-conductive strips disposed therebetween each having said first length and said second width being narrower than said first width; and a third electromagnetic insulating layer formed on said second electromagnetic blocking layer; a proximal end of said first electromagnetic blocking layer being connected to a voltage source; a distal end of said second electromagnetic blocking layer being connected to an electrode to apply voltage to heart tissue; a distal end of said first electromagnetic blocking layer being electrically insulated; a proximal end of said second electromagnetic blocking layer being electrically insulated; wherein said first loops are regularly spaced with respect to said first electromagnetic insulating layer and wherein said second loops are positioned such that each second loop overlaps a portion of an adjacent first loop.