Cannula for heart chamber implantation and related systems and methods

• US 8,545,379 B2
• Filed: 06/24/2008
• Issued: 10/01/2013
• Est. Priority Date: 07/19/2007
• Status: Active Grant

• Current Assignee: Circulite Inc. (Medtronic Plc)
• Original Assignee: Circulite Inc. (Medtronic Plc)
• Inventors: Marseille, Oliver, Aboulhosn, Walid
• Primary Examiner(s): Koharski, Christopher D
• Assistant Examiner(s): MAHMOOD, NADIA AHMAD
• Application Number:
  US12/144,738
• Publication Number:
  US 20090023975A1
• Time in Patent Office: 1,925 Days
• Field of Search: 600/16, 600/17, 607/130, 623/3.26, 623/3.13, 623/14
• 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:

a flexible 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 metallic 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, said flared tip portion including a flaring wall defining a varying thickness along a length of said flaring wall; 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 first ring member comprises a resilient material.

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

8. 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.

9. The cannula of claim 8, wherein said second ring member comprises a fabric adapted to be sutured to the wall of the chamber of the heart.

10. The cannula of claim 8, wherein said second ring member comprises a fabric adapted for tissue ingrowth therethrough.

11. The cannula of claim 10, wherein said fabric further comprises a polyester-based material.

12. 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 such that when said flared tip portion is inserted through an aperture in the wall of the chamber of the heart, said fabric positioned in said gap is located within the aperture in the wall of the chamber of the heart to facilitate tissue ingrowth from the aperture to said fabric positioned in said gap.

13. The cannula of claim 12, wherein said fabric is adapted to be sutured to the wall of the chamber of the heart.

14. The cannula of claim 12, wherein said fabric is adapted for tissue ingrowth therethrough.

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

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

a blood pump including an inlet; and

the cannula of claim 1,

wherein the first end of the flexible elongate body is operably coupled to the inlet of the blood pump.

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

a flexible, nonextensible 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 rigidly fixed 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 flaring wall defining a varying thickness along a length of said flaring wall, 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.

18. The cannula of claim 17, wherein said flared tip portion comprises a resilient material.

19. The cannula of claim 18, wherein said resilient material further comprises silicone.

20. The cannula of claim 17, wherein said ring member comprises a resilient material.

21. The cannula of claim 20, wherein said resilient material further comprises silicone.

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

a blood pump including an inlet; and

the cannula of claim 17,

wherein the first end of the flexible, nonextensible elongate body is operably coupled to the inlet of the blood.

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

a flexible, nonextensible 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 rigidly fixed 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 flaring wall defining a varying thickness along a length of said flaring wall, 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.

24. The cannula of claim 23, wherein said ring member comprises a fabric adapted to be sutured to the wall of the chamber of the heart.

25. The cannula of claim 23, wherein said ring member comprises a fabric adapted for tissue ingrowth therethrough.

26. The cannula of claim 25, wherein said ring member further comprises a polyester-based material.

27. The cannula of claim 23, wherein said flared tip portion further comprises titanium.

28. The cannula of claim 27, wherein said ring member further comprises a resilient material.

29. The cannula of claim 28, wherein said resilient material further comprises silicone.

30. The cannula of claim 23, wherein said flared tip portion further comprises a resilient material.

31. The cannula of claim 30, wherein said resilient material further comprises silicone.

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

a blood pump including an inlet; and

the cannula of claim 23,

wherein the first end of the flexible elongate body is operably coupled to the inlet of the blood.

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

a flexible 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 flaring wall;

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; and

a gap between said ring member and said flared tip portion, and a fabric positioned in said gap such that when said flared tip portion is inserted through an aperture in the wall of the chamber of the heart, said fabric positioned in said gap is located within the aperture in the wall of the chamber of the heart to facilitate tissue ingrowth from the aperture to said fabric positioned in said gap.

34. The cannula of claim 33, wherein said second end includes a flat portion.

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

a flexible 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 flaring wall defining a varying thickness along a length of said flaring wall; and

a first ring member on said elongate body and extending around said longitudinal axis, said ring member being proximally 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.

36. The cannula of claim 35, further comprising:

a second ring member on said elongate body and extending around said longitudinal axis, the second ring member being proximally spaced from said first ring member such that the first ring member is disposed between the second ring member and the flared tip portion.