Cartridge-needle unit having retractable needle

Details Cartridge-needle unit having retractable needle Cartridge-needle unit having retractable needle

1993-09-13

1994-10-25

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604195, A61M 5145

Patent

active

053584910

ABSTRACT:
This invention relates to a novel cartridge-needle unit having a retractable needle for use with disposable or reusable holders to form safety syringes. The cartridge-needle unit comprises a cartridge comprising a hollow body, a septum at the distal end of the body, means for retaining the septum, and a plunger, axially and reciprocally slidable through the interior of the body; a needle capable of being withdrawn within the cartridge; a hub comprising a sleeve adapted to be snapped on the distal end of the cartridge; means for retaining the needle within the hub during an injection; and means for releasing the needle from the hub after the injection comprising an element capable of passing through the septum. The retractable cartridge-needle unit exhibits improved reliability, reduces the tendency for body fluids and/or medication to remain in an unprotected area upon retraction of the needle and virtually eliminates the possibility that the needle can be released into the patient.

REFERENCES:
patent: 4507117 (1985-03-01), Vining et al.
patent: 4808169 (1989-02-01), Haber et al.
patent: 4909794 (1990-03-01), Haber et al.
patent: 4935014 (1990-06-01), Haber

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