Coaxial dual lumen catheter

Details Coaxial dual lumen catheter Coaxial dual lumen catheter

1997-10-02

1999-10-05

Coggins, Wynn Wood

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

059614854

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 part 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: 4776841 (1988-10-01), Catalano
patent: 4968307 (1990-11-01), Dake et al.
patent: 5207648 (1993-05-01), Gross
patent: 5360397 (1994-11-01), Pinchuk
patent: 5380276 (1995-01-01), Miller et al.

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