Patent ID: 8374704
Filing Date: 2013-02-12
Classification: A61L,A61N,C08G,Y10T

Abstract:
1. An implantable medical lead comprising: an elongated polymeric component disposed over at least one electrical conductor, wherein the elongated polymeric component comprises a polyisobutylene-based urethane copolymer comprising a polyisobutylene segment and a polyether segment selected from the group consisting of linear, branched and cyclic homopoly(alkylene oxide) and copoly(alkylene oxide) segments, wherein the elongated polymeric component comprises a main lead portion ranging from about 5 cm to about 125 cm in length and having a Shore hardness ranging from about 75 A to about 100 A and a distal tip portion positioned distal to the main lead portion, said distal tip portion ranging from about 1 cm to about 12 cm in length and having a lower Shore hardness than the main lead body ranging from about 30 A to 80 A.