Dual-lumen catheter and method of use

Details Dual-lumen catheter and method of use Dual-lumen catheter and method of use

1996-04-10

1999-02-09

Weiss, John G.

Surgery

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

Treating material introduced into or removed from body...

604 4, A61M 500, A61M 2500

Patent

active

058687173

ABSTRACT:
A dual-lumen catheter is disclosed that allows access to the vascular system of humans or animals for the high volume fluid flow related to hemodialysis or therapeutic apheresis. One lumen is circular with a wall thickness and material such that the lumen remains open during the fluid exchange. The second lumen is relatively thin walled designed to collapse against the first lumen under the pressure associated with the vascular system. This collapsing provide a minimum cross section of the catheter as it enters the body and the vascular system. However, the second lumen opens under pressure as a high volume fluid flow is introduced into the vascular system through the second lumen. This high volume fluid flow into the body is most often a return of fluid removed from the body via the thicker walled lumen.

REFERENCES:
patent: 4846791 (1989-07-01), Hattler et al.
patent: 5106368 (1992-04-01), Uldall et al.
patent: 5221255 (1993-06-01), Mahurkar et al.
patent: 5380276 (1995-01-01), Miller et al.
patent: 5451206 (1995-09-01), Young
patent: 5472418 (1995-12-01), Palestrant
patent: 5486159 (1996-01-01), Mahurkar

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