MULTI-LUMEN CATHETER ASSEMBLY

• US 20090054824A1
• Filed: 08/21/2007
• Published: 02/26/2009
• Est. Priority Date: 08/21/2007
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Critical Care, Inc.
• Inventors: Melsheimer, Jeffry S., Lyons, Drew P., Bosel, Christopher D.
• Granted Patent: US 8,002,729 B2
• Time in Patent Office: Days
• US Class Current: 604/6.160
• CPC Class Codes: A61M 1/3661 for haemodialysis
• CPC Class Codes: A61M 2025/0031 characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment
• CPC Class Codes: A61M 2025/0037 characterized by lumina being arranged side-by-side
• CPC Class Codes: A61M 2025/0078 for fluid inflow from the body into the catheter lumen
• 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
• CPC Class Codes: A61M 25/0071 Multiple separate lumens multiple separate lumens throughout the catheter A61M25/0026

Abstract

A multi-lumen catheter assembly for use in the extracorporeal treatment of a body fluid of a patient. The catheter assembly includes an elongated catheter body having a pair of lumens extending therethrough, and a septum separating the lumens. The catheter body has an aspiration port in communication with a first lumen for transporting fluid withdrawn from a body vessel to a treatment unit, and an infusion port in communication with a second lumen for return of treated fluid to the vessel. The infusion port is positioned distal of the aspiration port along a length of the catheter body. A flexible member is provided, wherein the flexible member has an end receivable in the first lumen and another end engaged with the catheter body distal of the aspiration port. The flexible member is structured and arranged to maintain a spacing between the aspiration port and a wall of the vessel.

Claims

1. A multi-lumen catheter assembly, comprising:

a catheter body having a plurality of lumens extending therein, said catheter body having an aspiration port in communication with a first lumen for transporting fluid withdrawn from a body vessel, and an infusion port in communication with a second lumen for return of said fluid to said vessel, said infusion port positioned distal of the aspiration port along a length of said catheter body, said catheter body including a septum separating said first and second lumens; and

a flexible member having an end receivable in said first lumen and having another end engaged with said catheter body distal of said aspiration port, said flexible member structured and arranged to maintain a spacing between said aspiration port and a wall of said vessel.

2. The multi-lumen catheter assembly of claim 1, wherein said catheter body tapers to an open distal end, said open distal end comprising said infusion port, and wherein said septum extends at least substantially to said infusion port along said catheter body length.

3. The multi-lumen catheter assembly of claim 2, wherein said flexible member other end is fixedly engaged with said catheter body at an attachment point disposed along a length of said septum between said aspiration port and said infusion port.

4. The multi-lumen catheter assembly of claim 3, wherein said flexible member defines at least one loop extending radially outwardly from said catheter body between said aspiration port and said attachment point.

5. The multi-lumen catheter assembly of claim 3, wherein said flexible member is configured to comprise at least two loops, wherein each of said loops extends radially outwardly from said catheter body to a respective attachment point.

6. The multi-lumen catheter assembly of claim 3, wherein said flexible member is wrapped in a generally helical configuration around said catheter body between said aspiration port and said attachment point.

7. The multi-lumen catheter assembly of claim 3, wherein said flexible member is configured in a generally serpentine configuration extending from said aspiration port to said attachment point.

8. The multi-lumen catheter assembly of claim 1, further comprising a removable sheath sized to be received over a distal portion of said catheter body and said flexible member for reducing a radial profile of said flexible member.

9. The multi-lumen catheter assembly of claim 8, wherein said sheath comprises a splittable sheath body.

10. The multi-lumen catheter of claim 2, further comprising at least one side port disposed along a length of said elongated member in communication with said infusion lumen for returning treated body fluid into said vessel.

11. A multi-lumen catheter assembly for use in the extracorporeal treatment of a body fluid of a patient, comprising:

an elongated catheter body having a proximal end, a distal end, a pair of lumens extending therethrough, and a septum separating said lumens, said distal end tapering to open distal tip, one of said lumens comprising an aspiration lumen, and the other of said lumens comprising an infusion lumen, an aspiration port in communication with said aspiration lumen for receiving said body fluid from a body vessel of said patient for transport to a treatment unit, said open distal end comprising an infusion port in communication with said infusion lumen for returning treated body fluid to said vessel; and

a flexible wire member having an end receivable in the aspiration lumen and having another end fixed to an attachment point at said septum distal to the aspiration port, the end of the flexible wire member receivable in the aspiration lumen being movable within the lumen such that a profile of the flexible wire member is selectively movable between a first position wherein the flexible wire member has a radial profile sufficient to maintain a spacing between the aspiration port and a wall of the vessel, and a second position wherein the radial profile does not substantially exceed an outer diameter of the elongated catheter body.

12. The multi-lumen catheter assembly of claim 11, further comprising a removable sheath member sized to be received over said distal end of catheter body, said removable sheath member dimensioned for selectively maintaining said flexible member in said second position.

13. The multi-lumen catheter assembly of claim 12, wherein said sheath member comprises a longitudinally splittable sheath body.

14. The multi-lumen catheter assembly of claim 13, wherein said flexible wire member is configured in said first position in one of a generally helical configuration and a generally serpentine configuration.

15. The multi-lumen catheter assembly of claim 11, wherein said catheter body comprises a flexible polymer and said flexible wire member comprises one of spring tempered stainless steel and nitinol.

16. A multi-lumen catheter assembly, comprising:

a catheter body having a plurality of lumens extending therein, said catheter body having an aspiration port in communication with a first lumen for transporting fluid withdrawn from a body vessel, and an infusion port in communication with a second lumen for return of said fluid to said vessel, wherein said infusion port is positioned distal of the aspiration port along a length of said catheter body, said catheter body including a septum separating said first and second lumens; and

a centering member having a proximal portion disposed along the length of said catheter member proximal of said aspiration port, and having a flexible member extending from said proximal portion distal of said aspiration port along said catheter length, said flexible member configured to maintain a spacing between said aspiration port and a wall of said body vessel.

17. The multi-lumen catheter assembly of claim 16, wherein said proximal portion of said centering member comprises a cannula securely fitted about a surface of said catheter body.

18. The multi-lumen catheter assembly of claim 17, wherein said catheter body includes an opening distal of said aspiration port, and wherein a distal end of said flexible member is movably received in said opening.

19. The multi-lumen catheter assembly of claim 16, wherein said centering member comprises a cannula having said flexible member cut from a distal portion thereof.

20. The multi-lumen catheter assembly of claim 19, wherein said flexible member comprises one of a spine, a helix, and a cage.