POLYISOBUTYLENE URETHANE, UREA AND URETHANE/UREA COPOLYMERS AND MEDICAL LEADS CONTAINING THE SAME
First Claim
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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 having a weight ratio of soft segments to hard segments ranging from 90;
10 to 50;
50, and wherein the elongated polymeric component further 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, the 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.
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Abstract
The present invention provides medical devices that contain polyisobutylene urethane copolymers, polyisobutylene urea copolymers and polyisobutylene urethane/urea copolymers. More particularly, the present invention provides medical leads that contain such copolymer.
23 Citations
20 Claims
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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 having a weight ratio of soft segments to hard segments ranging from 90;
10 to 50;
50, and wherein the elongated polymeric component further 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, the 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of manufacturing an implantable medical lead comprising:
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forming a tubular main lead body portion from a polyisobutylene-based urethane copolymer comprising soft segments and hard segments and having a weight of soft segments to hard segments ranging from 90;
10 to 50;
50, the main lead body 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;forming a distal tip portion positioned distal to the main lead body portion, the distal tip portion ranging from about 1 cm to about 12 cm in length and having a lower Shore hardness that the main lead body portion ranging from about 30 A to about 80 A; associating at least the tubular main lead body portion with a conductor and an electrode connected to the conductor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification