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:
- a first elongated polymeric component disposed over at least one electrical conductor, wherein the first elongated polymeric component comprises;
a main lead portion ranging from about 5 cm to about 125 cm in length and having a Shore hardness; and
a distal tip portion positioned distal to the main lead portion of the first elongated polymeric component, 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 portion of the first elongated component, wherein at least a portion of the first 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
a second elongated polymeric component disposed over at least a portion of the first elongated polymeric component, wherein the second elongated polymeric component comprises;
a main lead portion ranging from about 5 cm to about 125 cm in length and having a Shore hardness; and
a distal tip portion positioned distal to the main lead portion of the second elongated polymeric component, 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 portion of the second elongated polymeric component, wherein at least a portion of the second 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.
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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.
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Citations
19 Claims
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1. An implantable medical lead comprising:
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a first elongated polymeric component disposed over at least one electrical conductor, wherein the first elongated polymeric component comprises; a main lead portion ranging from about 5 cm to about 125 cm in length and having a Shore hardness; and a distal tip portion positioned distal to the main lead portion of the first elongated polymeric component, 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 portion of the first elongated component, wherein at least a portion of the first 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; anda second elongated polymeric component disposed over at least a portion of the first elongated polymeric component, wherein the second elongated polymeric component comprises; a main lead portion ranging from about 5 cm to about 125 cm in length and having a Shore hardness; and a distal tip portion positioned distal to the main lead portion of the second elongated polymeric component, 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 portion of the second elongated polymeric component, wherein at least a portion of the second 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of manufacturing an implantable medical lead comprising:
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forming an elongated polymeric component comprising an inner elongated polymeric component and an outer elongated polymeric component disposed over at least a portion of the inner elongated polymeric component, the inner elongated polymeric component is formed from a first 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 inner elongated polymeric component comprises a main lead body portion ranging from about 5 cm to about 125 cm in length and having a Shore hardness and a distal tip portion positioned distal to the main lead body portion of the inner elongated polymeric component, the distal tip portion of the inner elongated polymeric component ranging from about 1 cm to about 12 cm in length and having a lower Shore hardness than the main lead body portion of the inner elongated polymer component ranging from about 30A to about 80A, the outer elongated polymeric component comprises a main lead body portion ranging from about 5 cm to about 125 cm in length and having a Shore hardness and a distal tip portion of the outer elongated polymeric component positioned distal to the main lead body portion of the outer elongated polymeric component, 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 of the outer elongated polymeric component ranging from about 30A to about 80A;associating at least the main lead body portion of the inner elongated polymer component with a conductor and an electrode connected to the conductor. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification