Catheter introducing instrument

Details Catheter introducing instrument Catheter introducing instrument

1985-05-06

1986-12-16

Truluck, Dalton L.

Surgery

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

Treating material introduced into or removed from body...

128343, 604104, 604167, A61M 500

Patent

active

046294503

ABSTRACT:
An instrument for introducing a catheter into a blood vessel includes an inner needle portion having an inner needle, and a dilator portion having a dilator, the latter including first and second insertion portions. The first insertion portion, which has a comparatively small diameter and a length no less than the distance from a patient's skin to the blood vessel wall, is formed at the tip of the dilator from which a cutting edge at the tip of the inner needle is capable of protruding. The second insertion portion, which has a comparatively large diameter and a length no less than the above length, is smoothly connected to the first insertion portion by a tapered intermediate segment. Also provided is a sheath portion through which a catheter is capable of being passed under liquid-tight conditions.

REFERENCES:
patent: Re31855 (1985-03-01), Osborne
patent: 4014333 (1977-03-01), McIntyre
patent: 4052989 (1977-11-01), Kline
patent: 4239042 (1980-12-01), Asai
patent: 4424833 (1984-01-01), Spector et al.
patent: 4430081 (1984-02-01), Timmermans
patent: 4451256 (1984-05-01), Weikl et al.
patent: 4468224 (1984-08-01), Enzmann et al.

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