Syringe having needle isolation features

Details Syringe having needle isolation features Syringe having needle isolation features

1992-09-16

1994-05-03

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604218, A61M 500

Patent

active

053083300

ABSTRACT:
A syringe having structure to isolate fluid from the distal end of the syringe includes a barrel with a chamber therein. A stopper is slidingly disposed in the chamber and is provided with an aperture extending axially therethrough. A plug includes a head releasably engaged in a sealing portion of the aperture of the stopper. A rigid tail extends distally from the head and through the aperture in the stopper and projects outwardly from the distal end of the stopper. The tail is long enough so that it can be used to move the head out of the sealing portion of the aperture by applying force to the distal end of the tail. The tail has a cross-sectional shape which defines at least one fluid channel between the tail and the sealing portion of the stopper to allow fluid to flow from the chamber through the aperture in the stopper and out of the distal end of the barrel.

REFERENCES:
patent: 2323159 (1943-06-01), Smith
patent: 4116240 (1978-09-01), Guiney
patent: 4952206 (1990-08-01), Ibanez et al.
patent: 5026346 (1991-06-01), Spanner et al.

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