Coaxial dual lumen catheter

Details Coaxial dual lumen catheter Coaxial dual lumen catheter

1994-06-23

1996-01-02

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Material introduced into and removed from body through...

604280, 604283, 604284, A61M 300

Patent

active

054803802

ABSTRACT:
The invention provides a dual lumen catheter comprising outer and inner tube materials. A main portion extends axially and has a selected first cross-section. The main portion includes main portions of the respective outer and inner tube materials which together define an annular intake lumen and a main portion of a return lumen contained inside the intake lumen. A tubular transition portion is made up integrally of both the outer and inner tube materials and has a second cross-section smaller than the first cross-section. The transition portion extends axially from the distal end of the main portion and this can be extended to include a tip portion made up only of outer tube material and which extends axially from the transition portion. The transition portion on its own, or with the tip portion, defines a tip section which is a continuation of said main part of the return lumen to complete the return lumen.

REFERENCES:
patent: 4493696 (1985-01-01), Uldall
patent: 4682978 (1987-07-01), Martin
patent: 5188593 (1993-02-01), Martin

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