Intravascular catheter having barrier valve

Details Intravascular catheter having barrier valve Intravascular catheter having barrier valve

1994-05-13

1995-04-25

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604236, 604256, A61M 2500

Patent

active

054094640

ABSTRACT:
An intravascular catheter comprises a proximal housing carried on a tubular catheter body. The housing carries a slit, elastomeric partition valve which comprises a barrier wall positioned to block flow through the lumen of the catheter body, while permitting an elongated member such as a catheter to pass through the valve into the lumen without substantial back leakage of blood. The slit comprises a plurality of intersecting radii which rotate in spiral manner as the slit extends through the barrier wall to define a slit shaped of the intersecting radii of a first diameter on one side of the barrier wall. The slit spirals down to a lesser diameter on the other side of the barrier wall. Thus, advancement of a catheter or the like through the valve is facilitated, and back-leakage through the valve around the catheter is suppressed. Specifically, the intravascular catheter of this invention may be a catheter sheath introducer.

REFERENCES:
patent: 4000739 (1977-01-01), Stevens
patent: 4421296 (1983-12-01), Stephens
patent: 4436519 (1984-03-01), O'Neill
patent: 4798594 (1989-01-01), Hillstead
patent: 4895565 (1990-01-01), Hillstead
patent: 4960412 (1990-10-01), Fink
patent: 5176652 (1993-01-01), Littrell
patent: 5304156 (1994-04-01), Sylvanowicz et al.
patent: 5312362 (1994-05-01), Pfolsgraf et al.

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