Myocardial sutureless lead

• US 4,313,448 A
• Filed: 01/28/1980
• Issued: 02/02/1982
• Est. Priority Date: 01/28/1980
• Status: Expired due to Term

• Current Assignee: Medtronic Puerto Rico Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Stokes, Kenneth B.
• Primary Examiner(s): Kamm, William E.
• Application Number:
  US06/115,966
• Time in Patent Office: 736 Days
• Field of Search: 128/341, 128/349, 128/419 P, 128/772, 128/784-786
• US Class Current: 607/130
• CPC Class Codes: A61N 1/0587 Epicardial electrode systems; Endocardial electrodes piercing the pericardium

Abstract

Myocardial sutureless unipolar lead including an insulated conductor coil adjacent to a base pad, and a barbed electrode spaced adjacent to the base pad and connected to the conductor coil. The sutureless myocardial unipolar lead requires no stab wound or sutures for electrode placement and support. The barbed electrode is secured to the heart by gently pushing the tip into the myocardial tissue and the electrode is thereby secured to the myocardial tissue. The lead accepts a stiffening stylet for controlling the stiffness to aid in placement of the electrode within the myocardial tissue, and without the need for further insertion tool. The angle of the barbed electrode determines the specific application of the lead for ventricular or atrial pacing applications.

Claims

1. A body implantable lead comprising:

a conductor having a distal end;

an insulating sheath covering said conductor;

means attached to said conductor near said distal end for affixing said body implantable lead to body tissue; and

flexible base means attached to said conductor near said distal end which in a relaxed state is disposed over said fixation means from at least one direction and which upon application of a small amount of force may be bent back exposing said fixation means from said at least one direction.

2. A body implantable lead according to claim 1 wherein said affixing means further comprises:

a barbed element having a first pointed distal tip.

3. A body implantable lead according to claim 2 wherein said barbed element has a second pointed tip in a direction opposite of said first pointed tip.

4. A body implantable lead according to claim 3 wherein said first pointed tip and said second pointed tip point in directions parallel to the plane of said flexible base means in said relaxed state.

5. A body implantable lead according to claim 4 wherein said second pointed tip points in a direction toward said flexible base means.

6. A body implantable lead according to claim 2 wherein said first pointed tip points in a direction away from said flexible base means.

7. A body implantable lead according to claim 2, 3, 4, 6 or 5 wherein said first pointed tip points in a direction distal of said conductor.

8. A body implantable lead according to claim 7 further comprising:

means attached to said flexible base means for providing fibrogenic growth.

9. A body implantable lead according to claim 8 wherein said providing means includes surgical mesh.