Cardiac lead with composite insulating structure
AssigneeInControl, Inc.
InventorsJohn R. Helland, Diane M. Muff
Life of this patent
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Abstract
A lead for implantation in a human body exhibits improved combined biodegradation, blood surface compatibility, wear and flexibility characteristics. The lead includes at least one electrode and at least one connector connecting the electrode to a connector at the proximal end of the lead. An outer insulation surrounds the at least one conductor, and includes a first insulation formed of silicone encircling the at least one conductor, and a second insulation formed from polyurethane encircling the silicone rubber insulation.
Claims7
A lead for implantation in a human body, said lead comprising:
- at least one electrode;
- a connector;
- at least one conductor contacting the at least one electrode with the connector;
- and,
- an outer insulator including a silicone insulation encircling and immediately adjacent to the at least one conductor, and a polyurethane insulation encircling the silicone insulation and spaced from the at least one conductor by the silicone insulation.
A lead for implantation in a human body, the lead comprising:
- a lead body;
- a connector carried by the lead body;
- and
- electrode means carried by the lead body for establishing electrical contact with the human body,
- the lead body including a conductor contacting the electrode means with the connector, a first discrete insulation layer surrounding and immediately adjacent to the conductor, and a second discrete insulation layer surrounding and immediately adjacent to the first insulation, wherein the first insulation layer and second insulation layer are formed of different insulating materials and wherein the first insulation is formed of silicone and overlies all of the conductor, and wherein the second insulation is formed of polyurethane and includes at least one portion overlying less than all of the silicone first insulation.
Dependencies are inferred from the claim text.