US 4,037,599 A · Continuous flow catheter device

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.

Claims17

Dependent claims

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.

3 more elements

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.

2 more elements

Dependencies are inferred from the claim text.

Continuous flow catheter device

Life of this patent

Continuous flow catheter device

Life of this patent

Abstract

Claims17