Implantable medical lead including overlay

• US 20050004642A1
• Filed: 07/22/2004
• Published: 01/06/2005
• Est. Priority Date: 11/09/1998
• Status: Abandoned Application

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Shoberg, Bret R.
• Application Number:
  US10/897,662
• Publication Number:
  US 20050004642A1
• Time in Patent Office: Days
• US Class Current: 607/122
• CPC Class Codes: A61N 1/05 for implantation or insertion into the body, e.g. heart electrode A61N1/06 takes precedence
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems
• CPC Class Codes: A61N 1/0563 specially adapted for defibrillation or cardioversion
• CPC Class Codes: A61N 2001/0578 having means for removal or extraction

Abstract

A medical electrical lead includes a first elongate plastic tube including an outer surface, a conductor extending within the first plastic tube, an electrode having an outer diameter, mounted exterior to the outer surface of the first tube and coupled to a distal portion of the conductor, and a second elongate plastic tube formed of a base polymer to which surface modifying end groups are attached. The second tube is mounted exterior to the outer surface of the first tube, extends from a point adjacent to the first electrode proximally, and has an outer diameter approximately equal to the outer diameter of the first electrode.

Claims

1. A medical electrical lead comprising:

a first elongate plastic tube including a proximal end, a distal end and an outer surface;

a first conductor extending within the first plastic tube from the proximal end toward the distal end;

a first electrode having an outer diameter, mounted exterior to the outer surface of the first tube and coupled to a distal portion of the first conductor;

a connector terminating the proximal end of the first elongate plastic tube including a connector contact coupled to a proximal portion of the first conductor; and

a second elongate plastic tube formed of a base polymer to which surface modifying end groups are attached, the second tube being mounted exterior to the outer surface of the first tube, extending from a point adjacent to the first electrode proximally toward the connector, and having an outer diameter approximately equal to the outer diameter of the first electrode.

2. The lead of claim 1, further comprising:

a second conductor extending within the first plastic tube from the proximal end toward the distal end;

a second electrode having an outer diameter, mounted exterior to the outer surface of the first tube, distal to the first electrode, and coupled to a distal portion of the second conductor; and

a third plastic tube mounted exterior to and around the outer surface of the first tube, extending from a point adjacent to the first electrode distally to a point adjacent to the second electrode, and having an outer diameter approximately equal to the outer diameter of the second electrode.

3. The lead of claim 2, wherein the third elongate plastic tube is formed of a base polymer to which surface modifying end groups are attached.

4. The lead of claim 1, wherein the first electrode is a coil.

5. The lead of claim 2, wherein the first electrode is a coil.

6. The lead of claim 2, wherein the second electrode is a coil.

7. The lead of claim 1, wherein the base polymer is selected from the group consisting of polyurethanes, silicones, polyimides, fluoropolymers and polyolefins.

8. The lead of claim 1, wherein the base polymer is a polyurethane-silicone hybrid.

9. The lead of claim 1, wherein the surface modifying end groups are fluorocarbons.

10. The lead of claim 1, wherein the surface modifying end groups are silicones.

11. The lead of claim 1, wherein the surface modifying end groups are polyethylene oxides.

12. The lead of claim 11, wherein the polyethylene oxides are branched.

13. The lead of claim 11, wherein a biologically active agent is attached to one or more of the polyethylene oxide end groups.