Intravascular cannula

Details Intravascular cannula Intravascular cannula

1993-10-19

1995-05-23

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

604 53, 604264, 604280, A61M 5178

Patent

active

054176654

ABSTRACT:
An intravascular catheter comprises a plastic tube of a diameter capable of occupying a blood vessel. The plastic tube defines a tapered distal tip. The distal tip comprises an annular, distal end portion having an outer diameter that tapers at a first acute angle to the tube longitudinal axis, distally and inwardly to a thin, annular, distal end surface. The tube also defines a second, tapered, annular portion proximal of and next to the annular, distal end portion. The second portion defines an outer diameter that tapers distally and inwardly down to an outer diameter of essentially no less than the maximum outer diameter of the annular, distal end portion. The second portion tapers at a second acute angle to the longitudinal axis, which is less than the first acute angle. Also, an improved composition for the cannula tube is disclosed.

REFERENCES:
patent: 4629450 (1986-12-01), Suzuki et al.
patent: 4898591 (1990-02-01), Jang et al.
patent: 4944729 (1990-07-01), Buckberg et al.
patent: 4950257 (1991-08-01), Hibbs et al.
patent: 5066285 (1991-11-01), Hillstead
patent: 5116323 (1992-05-01), Kreuzer et al.

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