Rigid clampable cannula

• US 6,186,999 B1
• Filed: 08/27/1998
• Issued: 02/13/2001
• Est. Priority Date: 08/27/1998
• Status: Expired due to Term

• Current Assignee: Cleveland Clinic Foundation
• Original Assignee: Cleveland Clinic Foundation
• Inventors: Chen, Ji-Feng
• Primary Examiner(s): Seidel, Richard K.
• Assistant Examiner(s): RODRIGUEZ, CRIS LOIREN
• Application Number:
  US09/141,225
• Time in Patent Office: 901 Days
• Field of Search: 604/96, 604/523, 604/524, 604/525, 604/530, 604/532, 604/96.01, 604/103, 604/264, 604/246, 604/249, 604/236, 138/155, 285/145.1, 285/144.1, 285/148.13, 285/223, 285/235, 285/238-241
• US Class Current: 604/524
• CPC Class Codes: A61B 17/3462 with means for changing the diameter or the orientation of the entrance port of the cannula, e.g. for use with different-sized instruments, reduction ports, adapter seals expandable cannulas A61B17/3417
• CPC Class Codes: A61M 1/367 Circuit parts not covered by the preceding subgroups of group A61M1/3621
• CPC Class Codes: A61M 25/0045 multi-layered, e.g. coated coating materials A61L29/08
• CPC Class Codes: A61M 25/0662 Guide tubes
• CPC Class Codes: A61M 60/148 in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
• CPC Class Codes: A61M 60/178 drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices
• CPC Class Codes: A61M 60/20 Type thereof
• CPC Class Codes: A61M 60/857 Implantable blood tubes
• CPC Class Codes: A61M 60/859 Connections therefor
• CPC Class Codes: A61M 60/861 Connections or anchorings for connecting or anchoring pumps or pumping devices to parts of the patient's body
• CPC Class Codes: A61M 60/863 Apex rings

Abstract

A clampable conduit comprising a generally rigid layer having a first end and a generally flexible tube generally coaxial with the rigid layer. The flexible tube extends axially in a first direction beyond the first end. The conduit also has a generally rigid sleeve moveable between a cover position, wherein the sleeve covers a first part of the flexible tube, and an uncovered position, wherein the sleeve does not cover the first part of a flexible tube to enable clamping of the conduit.

Claims

1. An implantable conduit comprising:

a generally rigid conduit having a first end;

a generally flexible tube connected to said first end of said conduit; and

a generally rigid sleeve which is slidable along said rigid conduit between a cover position wherein said sleeve covers a first part of said flexible tube and an uncovered position wherein said sleeve does not cover said first part of said flexible tube to enable clamping of said flexible tube.

2. The conduit of claim 1 wherein said sleeve is comprised of two or more portions which telescopically engage each other and cooperate such that the sleeve is movable between a cover position wherein said sleeve generally covers said flexible tube and an uncovered position where said sleeve generally does not cover said flexible tube.

3. The conduit of claim 2 wherein said flexible tube extends within said rigid conduit.

4. The conduit of claim 3 wherein said flexible tube extends substantially the entire length of said conduit.

5. The conduit of claim 1 wherein said flexible tube is coupled to said rigid conduit.

6. The conduit of claim 1 further comprising retainer means for securing said sleeve in said cover position.

7. The conduit of claim 6 wherein said retainer means includes cooperating threads on said sleeve and on said flexible tube.

8. The conduit of claim 7 wherein said retainer means further includes a threaded fixation ring coaxially mounted on said flexible tube, said fixation ring being located so as to receive said threads on said sleeve when said sleeve is in said cover position.

9. The conduit of claim 1 wherein said sleeve is made from a titanium alloy.

10. The conduit of claim 1 wherein said rigid conduit is moldable.

11. The conduit of claim 1 wherein said flexible tube is polyurethane.

12. The conduit of claim 11 wherein said flexible tube has a biocompatible surface.

13. The conduit of claim 11 wherein said flexible tube has a blood compatible inner surface.

14. The conduit of claim 1 wherein said rigid conduit is a titanium alloy.

15. The conduit of claim 1 further comprising a sealing ring on said first end of said rigid conduit.

16. The conduit of claim 1 wherein said conduit has an inlet and outlet and wherein said conduit further includes an outlet fitting on said outlet.

17. The conduit of claim 16 further comprising a wire cage coupled to said inlet.

18. The conduit of claim 1 further comprising a flexible cuff adjacent said rigid conduit for attaching said conduit to soft tissue.

19. The conduit of claim 18 wherein said rigid conduit has a bend.

20. The conduit of claim 1 wherein said rigid conduit has a blood compatible coating on its outer surface.

21. A clampable conduit comprising:

a generally rigid conduit having a first end;

a generally flexible tube in fluid communication with said first end of said conduit; and

a generally rigid sleeve which is slidable along said rigid conduit between a cover position wherein said sleeve generally covers said flexible tube and an uncovered position wherein said sleeve generally does not cover said flexible tube.

22. A clampable conduit comprising:

a generally rigid tube having a first end;

a generally flexible tube section connected with said first end of said rigid tube such that said conduit may be clamped at said generally flexible tube section; and

a generally rigid sleeve which is axially slidable along said rigid conduit between a cover position wherein said sleeve generally covers said flexible tube and an uncovered position wherein said sleeve generally does not cover said flexible tube.

23. The conduit of claim 22 further comprising means for retaining said sleeve in said cover position.

24. The conduit of claim 23 wherein said retaining means includes cooperating threads on said sleeve and on said rigid section.

25. The device of claim 22 wherein said conduit further comprises a sleeve comprised of two or more portions which telescopically engage each other and cooperate such that the sleeve is movable between a cover position which protects the flexible section and an uncovered position so that the flexible section may be clamped to shut off flow.