CANNULA FOR HEART CHAMBER IMPLANTATION AND RELATED SYSTEMS AND METHODS

• US 20090023975A1
• Filed: 06/24/2008
• Published: 01/22/2009
• Est. Priority Date: 07/19/2007
• Status: Active Grant

• Current Assignee: Circulite Inc. (Medtronic Plc)
• Original Assignee: Circulite Inc. (Medtronic Plc)
• Inventors: Aboulhosn, Walid, Marseille, Oliver
• Granted Patent: US 8,545,379 B2
• Time in Patent Office: Days
• US Class Current: 600/16
• CPC Class Codes: A61B 17/3421 Cannulas
• CPC Class Codes: A61B 2017/00252 for by-pass connections, i.e. connections from heart chamber to blood vessel or from blood vessel to blood vessel
• CPC Class Codes: A61B 2017/3425 for internal organs, e.g. heart ports
• CPC Class Codes: A61B 2017/3488 Fixation to inner organ or inner body tissue
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/0074 Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
• CPC Class Codes: A61M 25/008 Strength or flexibility characteristics of the catheter tip
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence

Abstract

A cannula for implantation into a chamber of a heart includes an elongate body having a lumen extending along a longitudinal axis, a first end, and a second end. The first and second ends define openings into the lumen and the second end includes a flat portion. A flared tip portion extends from the flat portion of the second end in a direction toward the first end, and flares radially outward from the longitudinal axis and in such direction. A ring member extends around the axis of the elongate body and is spaced from the flared tip portion, and the ring member is adapted for retaining the elongate body in a position relative to a wall of the chamber. An embodiment of a flared tip portion may further include a barbed surface configured to contact tissue around an aperture in the wall of the heart when the cannula travels through the aperture.

Claims

1. A cannula for implantation into a chamber of a heart comprising:

an elongate body including a lumen extending along a longitudinal axis, a first end and a second end, said first and second ends defining openings into said lumen, said second end including a flat portion;

a flared tip portion on said elongate body and extending from said flat portion of said second end in a direction toward said first end, and flaring radially outward from said longitudinal axis and in said direction; and

a first ring member on said elongate body and extending around said longitudinal axis, said first ring member being spaced from said flared tip portion and being adapted for retaining said elongate body in a position relative to a wall of the chamber of the heart.

2. The cannula of claim 1, wherein said first ring member comprises a fabric adapted to be sutured to the wall of the chamber of the heart.

3. The cannula of claim 1, wherein said first ring member comprises a fabric adapted for tissue ingrowth therethrough.

4. The cannula of claim 3, wherein said fabric further comprises a polyester-based material.

5. The cannula of claim 1, wherein said flared tip portion comprises titanium.

6. The cannula of claim 1, wherein said flared tip portion comprises a resilient material.

7. The cannula of claim 6, wherein said resilient material further comprises silicone.

8. The cannula of claim 6, wherein said flared tip portion is configured to flex toward said longitudinal axis when said elongate body travels through an aperture in the wall of the chamber of the heart.

9. The cannula of claim 1, wherein said first ring member comprises a resilient material.

10. The cannula of claim 9, wherein said resilient material further comprises silicone.

11. The cannula of claim 1, further comprising a second ring member on said elongate body and extending around said longitudinal axis, said second ring member spaced from said first ring member along said longitudinal axis.

12. The cannula of claim 11, wherein said second ring member comprises a fabric adapted to be sutured to the wall of the chamber of the heart.

13. The cannula of claim 11, wherein said second ring member comprises a fabric adapted for tissue ingrowth therethrough.

14. The cannula of claim 13, wherein said fabric further comprises a polyester-based material.

15. The cannula of claim 1, further comprising a gap between said first ring member and said flared tip portion, and a fabric positioned in said gap.

16. The cannula of claim 15, wherein said fabric is adapted to be sutured to the wall of the chamber of the heart.

17. The cannula of claim 15, wherein said fabric is adapted for tissue ingrowth therethrough.

18. The cannula of claim 17, wherein said fabric comprises a polyester-based material.

19. A heart assist system for coupling into fluid communication with a chamber of a heart comprising:

a blood pump including an inlet;

an elongate body including a first end, a second end, and a lumen adapted to be coupled into fluid communication with said inlet, said lumen extending along a longitudinal axis, said first and second ends defining openings into said lumen, said second end including a flat portion;

a flared tip portion on said elongate body and extending from said flat portion of said second end in a direction toward said first end, and flaring radially outward from said longitudinal axis and in said direction; and

a ring member on said elongate body and extending around said longitudinal axis, said ring member being spaced from said flared tip portion and being adapted for retaining said elongate body in a position relative to a wall of the chamber of the heart.

20. A cannula for implantation into a chamber of a heart comprising:

an elongate body including a lumen extending along a longitudinal axis, a first end and a second end, said first and second ends defining openings into said lumen;

a flared tip portion on said elongate body and extending from said second end in a direction toward said first end, and flaring radially outward from said longitudinal axis and in said direction, said flared tip portion being configured to flex toward said longitudinal axis when said elongate body travels through an aperture in a wall of the chamber of the heart; and

a ring member on said elongate body and extending around said longitudinal axis, said ring member being spaced from said flared tip portion and being adapted for retaining said elongate body in a position relative to the wall of the chamber of the heart.

21. The cannula of claim 20, wherein said flared tip portion comprises a resilient material.

22. The cannula of claim 21, wherein said resilient material further comprises silicone.

23. The cannula of claim 20, wherein said ring member comprises a resilient material.

24. The cannula of claim 23, wherein said resilient material further comprises silicone.

25. A heart assist system for coupling into fluid communication with a chamber of a heart comprising:

a blood pump including an inlet;

an elongate body including a first end, a second end, and a lumen adapted to be coupled into fluid communication with said inlet, said lumen extending along a longitudinal axis, said first and second ends defining openings into said lumen;

a flared tip portion on said elongate body and extending from said second end in a direction toward said first end, and flaring radially outward from said longitudinal axis and in said direction, said flared tip portion being configured to flex toward said longitudinal axis when said flared tip portion travels through an aperture in a wall of the chamber of the heart; and

a ring member on said elongate body and extending around said longitudinal axis, said ring member being spaced from said flared tip portion and being adapted for retaining said elongate body in a position relative to the wall of the chamber of the heart.

26. A cannula for implantation into a chamber of a heart comprising:

an elongate body including a lumen extending along a longitudinal axis, a first end and a second end, said first and second ends defining openings into said lumen;

a flared tip portion on said elongate body and extending from said second end in a direction toward said first end, and flaring radially outward from said longitudinal axis and in said direction, said flared tip portion including a barbed surface configured to contact tissue around an aperture in a wall of the chamber of the heart when said elongate body travels through the aperture; and

a ring member on said elongate body and extending around said longitudinal axis, said ring member being spaced from said flared tip portion and being adapted for retaining said elongate body in a position relative to the wall of the chamber of the heart.

27. The cannula of claim 26, wherein said ring member comprises a fabric adapted to be sutured to the wall of the chamber of the heart.

28. The cannula of claim 26, wherein said ring member comprises a fabric adapted for tissue ingrowth therethrough.

29. The cannula of claim 28, wherein said ring member further comprises a polyester-based material.

30. The cannula of claim 26, wherein said flared tip portion further comprises titanium.

31. The cannula of claim 30, wherein said ring member further comprises a resilient material.

32. The cannula of claim 31, wherein said resilient material further comprises silicone.

33. The cannula of claim 26, wherein said flared tip portion further comprises a resilient material.

34. The cannula of claim 33, wherein said resilient material further comprises silicone.

35. A heart assist system for coupling into fluid communication with a chamber of a heart comprising:

a blood pump including an inlet;

an elongate body including a first end, a second end, and a lumen adapted to be coupled into fluid communication with said inlet, said lumen extending along a longitudinal axis, said first and second ends defining openings into said lumen;

a flared tip portion on said elongate body and extending from said second end in a direction toward said first end, and flaring radially outward from said longitudinal axis and in said direction, said flared tip portion including a barbed surface configured to contact tissue around an aperture in a wall of the chamber of the heart when said flared tip portion travels through the aperture; and

a ring member on said elongate body and extending around said longitudinal axis, said ring member being spaced from said flared tip portion and being adapted for retaining said elongate body in a position relative to the wall of the chamber of the heart.

36. A cannula for implantation into a chamber of a heart comprising:

an elongate body including a lumen extending along a longitudinal axis, a first end and a second end, said first and second ends defining openings into said lumen;

a metallic flared tip portion on said elongate body and extending from said second end in a direction toward said first end, and flaring radially outward from said longitudinal axis and in said direction; and

a first ring member on said elongate body and extending around said longitudinal axis, said first ring member being spaced from said metallic flared tip portion and adapted for retaining said elongate body in a position relative to a wall of the chamber of the heart.

37. The cannula of claim 36, further comprising a second ring member on said elongate body and extending around said longitudinal axis, said second ring member spaced from said first ring member along said longitudinal axis.

38. The cannula of claim 37, wherein said second ring member comprises a fabric adapted to be sutured to the wall of the chamber of the heart.

39. The cannula of claim 37, wherein said second ring member comprises a fabric adapted for tissue ingrowth therethrough.

40. The cannula of claim 39, wherein said fabric further comprises a polyester-based material.

41. The cannula of claim 36, further comprising a gap defined between said first ring member and said metallic flared tip portion, and a fabric positioned in said gap, said fabric adapted to be sutured to the wall of the chamber of the heart.

42. The cannula of claim 36, further comprising a gap defined between said first ring member and said metallic flared tip portion, and a fabric positioned in said gap, said fabric adapted for tissue ingrowth therethrough.

43. The cannula of claim 42, wherein said fabric further comprises a polyester-based material.

44. The cannula of claim 36, wherein said metallic flared tip portion comprises titanium.

45. The cannula of claim 36, wherein said first ring member comprises a fabric adapted to be sutured to the wall of the chamber of the heart.

46. The cannula of claim 36, wherein said first ring member comprises a fabric adapted for tissue ingrowth therethrough.

47. The cannula of claim 46, wherein said fabric further comprises a polyester-based material.

48. The cannula of claim 36, wherein said first ring member comprises a resilient material.

49. The cannula of claim 48, wherein said resilient material further comprises silicone.

50. A heart assist system for coupling into fluid communication with a chamber of a heart comprising:

a blood pump including an inlet;

an elongate body including a first end, a second end, and a lumen adapted to be coupled into fluid communication with said inlet, said lumen extending along a longitudinal axis, said first and second ends defining openings into said lumen;

a metallic flared tip portion on said elongate body and extending from said second end in a direction toward said first end, and flaring radially outward from said longitudinal axis and in said direction; and

a ring member on said elongate body and extending around said longitudinal axis, said ring member being spaced from said metallic flared tip portion and adapted for retaining said elongate body in a position relative to a wall of the chamber of the heart.

51. A method of implanting a cannula having a longitudinal axis into a chamber of a heart, the chamber of the heart having a wall and an aperture through the wall, the method comprising:

moving the cannula in a first direction through the aperture;

receiving a flared tip portion of the cannula within the chamber of the heart, the flared tip portion extending from a flat portion on an end of the cannula; and

establishing a position of the cannula within the chamber of the heart and along the longitudinal axis by contacting the wall of the chamber of the heart with a ring member extending around the longitudinal axis.

52. The method of claim 51, further comprising moving the cannula in a second direction opposite the first direction until the ring member contacts an outer surface on the wall of the chamber of the heart.

53. The method of claim 51, further comprising moving the cannula in a second direction opposite the first direction until a second ring member contacts an inner surface of the wall of the chamber of the heart.

54. The method of claim 51, further comprising flexing the flared tip portion toward the longitudinal axis as the cannula travels through the aperture.

55. The method of claim 51, further comprising coupling the ring member to the wall of the chamber of the heart.

56. The method of claim 55, wherein the coupling the ring member further comprises suturing the ring member to the wall of the chamber of the heart.

57. The method of claim 51, further comprising interlocking the ring member with tissue positioned proximate the ring member.

58. The method of claim 51, further comprising coupling a gap defined between the ring member and the flared tip portion to the wall of the chamber of the heart.

59. The method of claim 58, wherein the coupling the gap further comprises suturing the gap to the wall of the chamber of the heart.

60. The method of claim 51, further comprising interlocking a gap defined between the ring member and the flared tip portion with tissue positioned proximate the gap.