Continuous flow catheter device

• US 4,037,599 A
• Filed: 01/26/1976
• Issued: 07/26/1977
• Est. Priority Date: 01/26/1976
• Status: Expired due to Term

• Current Assignee: James D. Raulerson
• Original Assignee: James D. Raulerson
• Inventors: Raulerson, James D.
• Primary Examiner(s): Pellegrino, Stephen C.
• Application Number:
  US05/652,288
• Time in Patent Office: 547 Days
• Field of Search: 128/214.4, 128/214.2, 128/214 R, 128/347, 128/348, 128/213, 128/DIG. 16
• US Class Current: 604/44
• CPC Class Codes: A61M 2025/0031 characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment
• CPC Class Codes: A61M 2025/0039 characterized by lumina being arranged coaxially
• CPC Class Codes: A61M 5/1582 Double lumen needles

Abstract

A catheter device used in the catherization of a blood vessel during hemodialysis which comprises a hub assembly having at least a first and second fluid conduit each of which are connected in fluid communication with separate concentrically disposed tube elements so as to define a first and second fluid flow path. The concentrically arranged tube elements provide for a single puncture into the predetermined blood vessel wherein the first and second fluid conduits are interconnected to a continuous negative and positive source of fluid flow so that blood will be continuously drawn from and supplied to the predetermined blood vessel by means of the outer and inner tube elements respectively. The hub assembly may comprise at least two hub portions correspondingly dimensioned and configured to define the two fluid conduits therein and also provide structure for securing the inner and outer tube elements to the hub assembly and further provide alignment structure for properly positioning the two hub portions into mating engagement with one another to define the operative hub assembly.

Claims

1. A catheter device for the catherization of predetermined blood vessels required during hemodialysis, said catheter device comprising:

a hub means including at least two fluid conduits disposed in spaced, separated relation to one another;

tube means connected to said hub means and including at least an inner tube element and an outer tube element disposed in concentric relation to one another, each of said tube elements connected in fluid communicating relation to one of said two fluid conduits, said hub means comprising socket means formed in said hub means, mounting means formed on said tube means and comprising at least in part a substantially corresponding configuration as said socket means;

said mounting means disposed in mounted engagement with said socket means on the interior of said hub means;

a first path of fluid flow defined by the interconnected outer tube of one of said fluid conduits;

a second fluid flow path defined by the interconnected inner tube element and the other of said fluid conduits, said first and second fluid flow paths disposed in segregated relation to one another;

said first and second fluid flow paths interconnected to a continuous negative and positive source of fluid pressure, whereby a continuous flow of blood simultaneously travels from and to the predetermined blood vessel upon activation of the positive and negative source of fluid flow.

2. A catheter device as in claim 1 wherein said outer tube element extends along a predetermined length of said inner tube element, said outer tube element having pore means formed therein, said inner tube element being apertured at least at the free end thereof, whereby fluid flow passes from and to the predetermined blood vessel through said outer and inner tube elements respectively.

3. A catheter device as in claim 1 wherein each of said two fluid conduits include a free end, each of said free ends of said two fluid conduits including a luer fitting.

4. A catheter device as in claim 1 wherein said socket means comprises at least two socket elements disposed in aligned, substantially coaxial relation to one another, each of said socket elements disposed along and at least partially defining one of said first or second fluid flow paths.

5. A catheter device as in claim 4 wherein one of said socket elements substantially defines the junction of each of said inner and outer tube elements with each of respective ones of said fluid conduits, said socket means disposed in fluid flow segregated relation to one another.

6. A catheter device as in claim 4 further comprising fluid directing means disposed in upstream, fluid guiding relation to at least one of said socket elements, whereby turbulence of flow on the interior of said hub means in reduced.

7. A catheter device as in claim 1 further comprising flow restrictor means mounted on said hub means and disposed in flow interruptive relation to at least one of said first and second fluid flow paths.

8. A catheter device as in claim 7 wherein said flow restrictor means comprises flexible wall portions integrally formed in the wall of said hub means in corresponding relation to at least one of said two fluid conduits.

9. A catheter device as in claim 7 wherein said flow restrictor means comprises flexible wall portions formed in the wall of said hub means in corresponding relation to both of said two fluid conduits.

10. A catheter device as in claim 1 further comprising connector means mounted on the exterior of said catheter device and configured to dispose said catheter device in attached relation to the patient utilizing said catheter device.

11. A catheter device as in claim 1 wherein said hub means comprises two hub portions integrally attached to one another, each of said hub portions comprising conduit portions which themselves are correspondingly disposed and configured so as to at least partially define said two fluid conduits when said hub portions are disposed in mating engagement with one another, said hub means having a substantially symetrical configuration relative to the junction of said two hub portions defining said hub means.

12. A catheter device as in claim 11 wherein said junction disposed in interconnecting relation to said two hub portions comprises a hinge line about which one of said hub portions may be rotated relative to the other of said hub portions so as to bring said two hub portions into mating engagement with one another.

13. A catheter device for the catherization of predetermined blood vessels required during hemodialysis, said catheter device comprising:

a hub means including at least two fluid conduits disposed in spaced, separated relation to one another;

tube means connected to said hub means and including at least an inner tube element and an outer tube element disposed in concentric relation to one another, each of said tube elements connected in fluid communicating relation to one of said two fluid conduits, said hub means comprising at least two hub portions, at least one of said hub portions including conduit portions formed therein and being substantially correspondingly configured and disposed to at least partially define said two fluid conduits, said two hub portions disposed in engageable, mating relation to one another, whereby said hub means is formed upon the mating engagement of said hub portions;

a first path of fluid flow defined by the interconnected outer tube one of said fluid conduits;

a second fluid flow path defined by the interconnected inner tube element and the outer of said fluid conduits, said first and second fluid flow paths disposed in segregated relation to one another;

said first and second fluid flow paths interconnected to a continuous negative and positive source of fluid pressure, whereby a continuous flow of blood simultaneously travels from and to the predetermined blood vessel upon activation of the positive and negative source of fluid flow.

14. A catheter device as in claim 13 wherein each of said hub portions include substantially correspondingly configured conduit portions, said conduit portions at least partially defining said two fluid conduits.

15. A catheter device as in claim 13 wherein said hub portions each comprise joining means including an outwardly extending flange along at least a portion of the periphery of each of said hub portions, said flanges of each hub portion disposed in substantially corresponding, mating engagement with one another when said hub means is in its assembled position.

16. A catheter device as in claim 15 further comprising alignment means formed in each of said flange of each hub portion and positioned to dispose the corresponding conduit portions of said hub means in predetermined relation to one another upon the mating engagement of said hub portions.

17. A catheter device as in claim 15 wherein said flanges of both hub portions are sealed together by ultrasonic weld.