Syringe for infusion

Details Syringe for infusion Syringe for infusion

1997-08-25

2000-09-26

Coggins, Wynn Wood

Surgery

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

Treating material introduced into or removed from body...

604 88, 604191, A61M 3700

Patent

active

061236853

ABSTRACT:
A syringe is modified to permit gradual administration of its contents with reduced problems due to seizing or stiction of its piston by dividing its piston axially into two parts, a front detached part and rear part which is the only part having provision for attachment to a syringe actuator. The rear part has a passage through which fluid can be gradually introduced from an actuator into a chamber between the parts so as to force the front part forward while the rear part is restrained against rearward movement. The passage may be initially closed by a septum which is penetrated by a cannula on the actuator. If the syringe actuator is a plunger, the syringe can be used conventionally.

REFERENCES:
patent: 2605765 (1952-08-01), Kollsman
patent: 3965898 (1976-06-01), Cloyd
patent: 4643721 (1987-02-01), Brunet
patent: 4973308 (1990-11-01), Borras et al.
patent: 5281198 (1994-01-01), Haber et al.

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