Apparatus and method for effecting percutaneous catheterization

Details Apparatus and method for effecting percutaneous catheterization Apparatus and method for effecting percutaneous catheterization

1985-08-30

1987-03-17

Pellegrino, Stephen C.

Surgery

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

Treating material introduced into or removed from body...

604170, 604165, 128658, A61M 500

Patent

active

046504729

ABSTRACT:
A apparatus and method for percutaneous catheterization of a blood vessel permitting use of a small gauge needle is shown. A 22 gauge needle is used for making the initial entry into the blood vessel. A wire guide is then introduced into the blood vessel through the introducer needle, the needle then being withdrawn. A catheter and an inner cannula are passed in unison over the wire guide, through the skin and into the blood vessel. The cannula is provided with a tapered tip which extends through the distal opening of the catheter, thereby providing a diametrical transition between the small wire guide and the relatively larger catheter, resulting in a minimum of trauma during insertion. Once the catheter is in place, the inner cannula and wire guide are withdrawn, leaving the catheter in place with a relatively large distal opening, thereby promoting good fluid flow characteristics of the catheter.

REFERENCES:
patent: 3903885 (1975-09-01), Fuchs
patent: 4230123 (1980-10-01), Hawkins, Jr.
patent: 4239042 (1980-12-01), Asai
patent: 4306562 (1981-12-01), Osborne
patent: 4405314 (1983-09-01), Cope
patent: 4538622 (1985-09-01), Sampson et al.

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