Hemodialysis catheter with thrombus blocker

• US 9,987,461 B2
• Filed: 10/13/2010
• Issued: 06/05/2018
• Est. Priority Date: 10/13/2010
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Inventors: Hardert, Michael W., Kurrus, Michael R.
• Primary Examiner(s): Mehta, Bhisma
• Assistant Examiner(s): Engel, Matthew A
• Application Number:
  US12/903,677
• Publication Number:
  US 20120095416A1
• Time in Patent Office: 2,792 Days
• Field of Search: 604626, 604265, 604266, 604267, 604 9301, 128899, 606200
• CPC Class Codes: A61M 1/3661 for haemodialysis
• CPC Class Codes: A61M 25/0026 Multi-lumen catheters with stationary elements catheter assemblies comprising a catheter in combination with a guide tube, sheath or sleeve A61M2025/0681; catheters comprising telescoping coaxial elements A61M2025/0175

Abstract

A hemodialysis catheter with a plurality of umbrella-like wire members covered with a film which works as a thrombus blocker and can easily and effectively remove the thrombus is disclosed. The hemodialysis catheter has a proximal lumen, the arterial lumen, and a distal lumen, the venous lumen. An elongate member is longitudinally put in either the proximal lumen or the distal lumen, or two elongate members in both lumens. A plurality of umbrella-like wire members are connected to the end of the elongate member. When the hemodialysis catheter is put in the vessel but not in use, the end of the lumen is capped off by the plurality of umbrella-like wire members covered with a film. When it is ready to use, the doctor can pull the elongate member which connects to the plurality of umbrella-like wire members out off the lumen inverting the plurality of umbrella-like wire members and clearing away any thrombus that has formed.

Claims

1. A hemodialysis catheter with thrombus blocker comprising:

an elongate shaft extending from a proximal end portion to a distal end portion;

a first lumen extending through the shaft and having a distal end;

a second lumen extending through the shaft and having a distal end, said second lumen being disposed adjacent to said first lumen;

an elongate member longitudinally and removably disposed in one of said first or second lumens; and

a plurality of curvilinear umbrella-like wire members each extending between a first end and a second end, said first end being connected to a distal end of said elongate member and said second end being proximal of and spaced apart from the distal end of said elongate member, said plurality of curvilinear umbrella-like wire members forming an umbrella-like structure with the second ends of said plurality of curvilinear umbrella-like members circumferentially disposed about and fully encompassing an outer circumference of the distal end portion of said shaft, said second ends being disposed proximally of circumferentially about the distal end portion of said shaft so as to encompass the distal end portion of said shaft, wherein the plurality of curvilinear umbrella-like wire members each comprise a wire portion extending distally from the second end and towards the distal end of the elongate member, wherein the wire portions are each spaced apart from each other in a parallel non-contacting manner, and are disposed externally to and proximally of the distal end of the elongate member so as to circumferentially encompass the distal end portion of said shaft, wherein the plurality of curvilinear umbrella-like wire members are configured to be inverted and movably disposed within said first or second lumen so as to permit removal of the elongate member from the proximal end portion of the shaft, and wherein the umbrella-like structure is configured to inhibit or remove thrombus formation from about the outer circumference of the distal end portion of said shaft upon rotation of the elongate member relative to the shaft.

2. A hemodialysis catheter with thrombus blocker as claim 1, wherein the elongate member is longitudinally placed in said first lumen.

3. A hemodialysis catheter with thrombus blocker as claim 2, wherein said plurality of curvilinear umbrella-like wire members of the umbrella-like structure are self-supporting and configured to engage an outer surface of the distal end of said shaft.

4. A hemodialysis catheter with thrombus blocker as claim 3, wherein said plurality of curvilinear umbrella-like wire members are invertable to permit the elongate member to be pulled out of a proximal end of said lumen.

5. A hemodialysis catheter with thrombus blocker as claim 4, wherein said elongate member is made of metal.

6. A hemodialysis catheter with thrombus blocker as claim 5, wherein said plurality of curvilinear umbrella-like wire members comprise nitinol.

7. A hemodialysis catheter with thrombus blocker as claim 6, wherein said plurality of curvilinear umbrella-like wire members are each bonded onto the distal end of said elongate member.

8. A hemodialysis catheter with thrombus blocker as claim 7, wherein said plurality of curvilinear umbrella-like wire members are each welded onto the distal end of said elongate member.

9. A hemodialysis catheter with thrombus blocker as claim 8, wherein a film is mounted about and to said plurality of curvilinear umbrella-like wire members.

10. A hemodialysis catheter with thrombus blocker as claim 9, wherein said film is formed by an over molding process.

11. A hemodialysis catheter with thrombus blocker as claim 10, wherein said film is attached by means of suture.

12. A hemodialysis catheter with thrombus blocker as claim 1, wherein the elongate member is longitudinally placed in said second lumen.

13. A hemodialysis catheter with thrombus blocker as claim 12, wherein said plurality of curvilinear umbrella-like wire members of the umbrella-like structure are self-supporting and configured to engage an outer surface of the distal end of said shaft.

14. A hemodialysis catheter with thrombus blocker as claim 13, wherein said plurality of curvilinear umbrella-like wire members are invertable to permit said elongate member to be pulled out of a proximal end of said lumen.

15. A hemodialysis catheter with thrombus blocker as claim 14, wherein said elongate member is made of metal.

16. A hemodialysis catheter with thrombus blocker as claim 15, wherein said plurality curvilinear umbrella-like wire members comprise nitinol.

17. A hemodialysis catheter with thrombus blocker as claim 16, wherein said plurality of curvilinear umbrella-like wire members are each bonded onto the distal end of said elongate member.

18. A hemodialysis catheter with thrombus blocker as claim 17, wherein said plurality of curvilinear umbrella-like wire members are each welded onto the distal end of said elongate member.

19. A hemodialysis catheter with thrombus blocker as claim 18, wherein a film is mounted about and to said plurality of curvilinear umbrella-like wire members.

20. A hemodialysis catheter with thrombus blocker as claim 19, wherein a film is formed by an over molding process.

21. A hemodialysis catheter with thrombus blocker as claim 20, wherein said film is attached by means of suture.

22. A hemodialysis catheter with thrombus blocker comprising:

an elongate shaft extending between a proximal end and a distal end;

a first lumen extending through the shaft and having a first distal opening disposed adjacent to the distal end of the shaft;

a second lumen extending through the shaft and having a second distal opening disposed proximally of and spaced apart from the first distal opening, said second lumen being disposed adjacent to said first lumen;

an elongate member longitudinally and removably disposed in one of said first or second lumens;

a plurality of individual self-supporting umbrella-like wire members connected to and extending radially outwardly and proximally from a distal end of said elongate member, the plurality of individual self-supporting umbrella-like members being disposed in a non-contacting manner along a majority of a length thereof, the majority of the length of the plurality of individual self-supporting umbrella-like wire members being disposed proximally of one of the first or second distal openings, wherein said plurality of individual self-supporting umbrella-like wire members form an umbrella-like structure configured to cap off the first distal opening, and wherein the plurality of individual self-supporting umbrella-like wire members are configured to be inverted and movably disposed within said first or second lumen so as to permit removal of the elongate member from the proximal end of the shaft; and

a film mounted to said plurality of individual self-supporting umbrella-like wire members, said film extending between adjacent pairs of individual self-supporting umbrella-like wire members of said plurality of individual self-supporting umbrella-like wire members, said film disposed circumferentially about and fully encompassing the distal end of said shaft.