Probe for cardiac pacemaker

• US 5,466,255 A
• Filed: 04/30/1993
• Issued: 11/14/1995
• Est. Priority Date: 04/30/1992
• Status: Expired due to Term

• Current Assignee: Sorin CRM SAS (MicroPort Scientific Corp.)
• Original Assignee: Ela Medical S.A. (LivaNova Plc)
• Inventors: Franchi, Pierre
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): SCHAETZLE, KENNEDY
• Application Number:
  US08/056,259
• Time in Patent Office: 928 Days
• Field of Search: 607/116, 607/119, 607/122, 607/37, 607/126, 607/127-132, 128/642
• US Class Current: 607/128
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems
• CPC Class Codes: A61N 1/0573 chacterised by means penetrating the heart tissue, e.g. helix needle or hook

Abstract

A heart signal sensor 11 is connected by a flexible cord 13 to a catheter 17. The sensor 11 and the catheter 17 are attached to install the sensor in the cardiac wall, and thereafter are disunited and separately attached to the cardiac wall 1. The sensor is attached to the cardiac wall by claws projecting from the sensor surface, and may be installed by rotating or by deformation of the sensor.

Claims

1. A probe for a cardiac pacemaker comprising a heart signal sensor susceptible of applying pacing signals, a catheter having a distal end disposed between said sensor and the pacemaker and a flexible cord connected to said sensor and said catheter, and a semi-rigid attachment having a first end connected to the catheter and a second end for attachment to a cardiac wall, wherein the sensor is united with the catheter distal end for attachment to a cardiac wall and after said attachment the catheter distal end is disunited from said sensor and maintained at a distance from said sensor with the catheter connected to said sensor by the flexible cord and connected to the cardiac wall by the semi-rigid attachment so as not to apply any mechanical stress on said sensor.

2. The probe as claimed in claim 1, wherein said sensor further comprises an electrode and the catheter further comprises an electrical conductor electrically connected to the electrode, said electrical conductor being passed through the flexible cord.

3. The probe as claimed in claim 2, wherein said sensor comprises an insulating board comprising on one side said electrode and on the other side a block for connection to said flexible cord.

4. The probe as claimed in claim 3, wherein said insulating board has a commissure.

5. The probe as claimed in claim 3, wherein said insulating board has a slow-diffusion anti-inflammatory substance around said electrode.

6. The probe as claimed in claim 3, wherein said sensor comprises means for catching to said cardiac wall distributed over said other side of said insulating board.

7. The probe as claimed in claim 6, wherein said means for catching the sensor to the cardiac wall are angled claws and are installed by rotation of said sensor.

8. The probe as claimed in claim 6, wherein said sensor catching means are angled claws situated in radial planes containing the axis of said sensor, and are installed by deformation of said insulating board.

9. The probe as claimed in claim 6, wherein said sensor catching means is a passive structure for promoting fibrin growth to secure the sensor to the cardiac wall.

10. The probe of claim 2 wherein said electrode further comprises at least two electrodes and said flexible cord comprises at least two electrical leads connected to said at least two electrodes respectively, said electrical leads running therethrough to connect electrically said electrodes to said catheter electrical conductor.

11. The probe as claimed in claim 1, wherein said semi-rigid attachment comprises means for catching to said cardiac wall.

12. The probe as claimed in claim 1, wherein said semi-rigid attachment first end is movable in relation to said catheter to install said semi-rigid attachment second end in the cardiac tissue.

13. A method of connecting a cardiac pacemaker electrode to cardiac tissue comprising:

(a) providing a sensor having an electrode and a catheter having a sensor receptacle at the distal end;

(b) mating the sensor to the sensor receptacle of the catheter;

(c) positioning the catheter distal end so that the sensor electrode is in contact with the cardiac tissue;

(d) securing the sensor to the cardiac tissue;

(e) separating the sensor from the sensor receptacle; and

(f) securing the catheter to the cardiac tissue at a distance from the sensor so that the catheter does not apply any significant mechanical stress on the sensor.

14. The method of claim 13 wherein step (a) further comprises providing the sensor with an insulating board on which the electrode is secured, mounting a plurality of claws on the insulating board to project at an angle from the insulating board, and wherein step (d) further comprises manipulating the claws to pass into the tissue.

15. The method of claim 14 wherein the insulating board has an axis of rotation and the plurality of claws extend from the board and step (d) further comprises rotating the insulating board so that the claws pass into the tissue.

16. The method of claim 15 further comprising providing the sensor with a slow-diffusion anti-inflammatory substance around the electrodes.

17. The method of claim 14 wherein the insulating board is deformable and has an undeformed shape and the plurality of claws extend from the board wherein step (d) further comprises deforming the board and moving the board towards the tissue so that the claws pass into the tissue, and allowing the board to return to its undeformed shape.

18. The method of claim 17 further comprising providing the sensor with a slow-diffusion anti-inflammatory substance around the electrodes.

19. The method of claim 14 wherein step (b) further comprises providing the insulating board with a shaped-block and inserting the block in the sensor receptacle.

20. The method of claim 14 further comprising connecting the sensor to the catheter by a flexible cord containing an electrical connection between the electrode and the cardiac pacemaker.

21. The method of claim 20 further comprising withdrawing the electrode from the cardiac tissue by remating the sensor with the sensor receptacle and manipulating the sensor to withdraw the claws from the tissue.

22. The method of claim 14 further comprising connecting the sensor to a recovery cord for pulling the sensor secured to tissue away from the tissue.

23. The method of claim 13 wherein step (a) further comprises providing the sensor with an insulating board on which the sensor is secured, providing the insulating board with a passive structure for promoting fibrin growth thereon, and wherein step (d) further comprises placing the passive structure in contact with the cardiac tissue for a time to permit fibrin to grow and secure the electrodes in contact with the cardiac tissue.

24. A probe for connecting a cardiac pacemaker to cardiac tissue for monitoring and stimulating cardiac activity comprising:

a sensor having an electrode and means for catching the sensor to the cardiac tissue;

a catheter interposed between the pacemaker and the cardiac tissue having a distal end; and

means for securing the catheter to the cardiac tissue with the distal end spaced a distance from the sensor so as not to apply any mechanical stress on the sensor.

25. The probe of claim 24 wherein the catheter further comprises a passageway and the sensor further comprises an electrode and a wire connecting the electrode to the pacemaker and passing through the catheter passageway.

26. The probe of claim 24 wherein the sensor further comprises:

an insulating board having first and second sides, the electrode being mounted on one side of the insulating board; and

a shaped-block mounted on the other side of the insulating board, wherein the catheter distal end has an aperture for receiving the sensor shaped-block.

27. The probe of claim 24 wherein the sensor catching means further comprises a plurality of claws, the claws being oriented for insertion into the cardiac tissue to hold the electrode in contact with the cardiac tissue.

28. The probe of claim 27 wherein the plurality of claws are mounted on the insulating board and project from the insulating board on the one side of the insulating board.

29. The probe of claim 28 wherein the plurality of claws project tangentially to the periphery of the insulating board so that the claws may be inserted into cardiac tissue by rotation of the sensor.

30. The probe of claim 28 wherein the insulating board has an axis and is deformable about the axis and the plurality of claws project in radial planes containing the axis the insulating board so that the claws may be inserted into the cardiac tissue by deforming the insulating board.

31. The probe of claim 24 wherein the means for securing the catheter further comprises a spring that is inserted into the cardiac tissue by rotation relative to the catheter.

32. The probe of claim 24 wherein the sensor further comprises an insulating board on which the electrode is mounted and the insulating board further comprises a commissure.

33. The probe of claim 24 wherein the sensor further comprises an insulating board on which the electrode is mounted and the insulating board further comprises a slow diffusion anti-inflammatory substance proximate to said electrodes.

34. A probe for connecting a muscle stimulating device to muscle tissue comprising:

a catheter disposed between the stimulating device and the muscle tissue having an interior passageway and means for securing the catheter to the muscle tissue at a distance from the tissue; and

a sensor comprising;

an insulating sheet,

an electrode mounted on the insulating sheet,

a wire electrically connecting the electrode to the muscle stimulating device and passing through the catheter passageway, and

a plurality of claws projecting from the insulating sheet oriented to penetrate and secure the sensor electrode to the muscle tissue independent of the catheter, wherein the secured catheter does not apply any substantial mechanical stress on the secured sensor.

35. The probe of claim 34 wherein the sensor further comprises a source of slow diffusing anti-inflammatory substance proximate to said electrodes.

36. The probe of claim 34 wherein the sensor further comprises a block and a flexible cord connecting the sensor to the probe, wherein the catheter further comprises a sensor receptacle for receiving the block for securing the sensor to the cardiac wall.

37. The probe of claim 36 wherein the catheter further comprises a guide wire secured to the sensor receptacle for rotating the sensor to secure the sensor to the cardiac wall.

38. The probe of claim 36 wherein the sensor further comprises a spring for biasing the sensor in an undeformed shape.

39. A probe for a cardiac pacemaker comprising a heart signal sensor susceptible of applying pacing signals, a catheter disposed between said sensor and the pacemaker, a flexible cord connecting the sensor to the catheter, and semi-rigid attachment element connected to the catheter and installable in a cardiac wall wherein said sensor further comprises an electrode to contact a cardiac wall, the flexible cord further comprises an electrical conductor electrically connected to the electrode, and the catheter is disunitable from said sensor and attachable to the cardiac wall by said semi-rigid attachment element so that the catheter is maintained at a distance from said sensor and does not apply any mechanical stress on the sensor when said sensor is attached to the cardiac wall and the catheter is attached to the cardiac wall by said semi-rigid attachment element.

40. The probe as claimed in claim 39, wherein said sensor comprises an insulating board comprising on one side said electrode and on the other side a block for connection to said flexible cord.

41. The probe as claimed in claim 40, wherein said insulating board has a commissure.

42. The probe as claimed in claim 40, wherein said insulating board has a slow-diffusion anti-inflammatory substance around said electrode.

43. The probe as claimed in claim 40, wherein said sensor comprises means for catching to said cardiac wall distributed over said other side of said insulating board.

44. The probe as claimed in claim 43, wherein said means for catching the sensor to the cardiac wall are angled claws and are installed by rotation of said sensor.

45. The probe as claimed in claim 43, wherein said sensor catching means are angled claws situated in radial planes containing the axis of said sensor, and are installed by deformation of said insulating board.

46. The probe as claimed in claim 43, wherein said sensor catching means is a passive structure for promoting fibrin growth to secure the sensor to the cardiac wall.

47. The probe as claimed in claim 39, wherein said semi-rigid attachment element comprises means for catching to said cardiac wall.

48. The probe as claimed in claim 39, wherein said semi-rigid attachment element is movable in relation to said catheter to install said semi-rigid attachment element in said cardiac wall.

49. The probe as claimed in claim 39 wherein said electrode further comprises at least a first electrode and a second electrode and said flexible cord comprises at least two corresponding electrical conductors running therethrough to connect electrically said first and second electrodes respectively to said pacemaker.