US 5,354,284 AGranted

Multiple injection syringe system

AssigneeHabley Medical Technology Corporation

InventorsTerry M. Haber, Clark B. Foster

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Abstract

A multiple injection syringe system having a cartridge carrier that is loaded with three pre-filled cartridges which are to be selectively accessed so that the contents of the cartridges can be delivered to a patient in a particular, predetermined order. The syringe system of the present invention has particular application to facilitating the SASH process, such that two of the cartridges are filled with saline and one with heparin. A double ended needle cannula is carried by a rotatable manifold. One end of the cannula projects outwardly from the manifold for administering an injection, while the opposite end projects inwardly to communicate with a selected cartridge within the carrier. The manifold is rotated around the cartridge carrier to each of three positions corresponding to three steps of the SASH process, whereby the cannula is correspondingly rotated from one cartridge to the next. Fluid from the selected cartridge is expulsed via the cannula by applying to said cartridge a hydraulic pressure that is generated by driving a piston through a fluid filled cylinder.

Claims23

Dependent claims

A multiple injection syringe system, comprising:

a hypodermic needle cannula having proximal and distal ends;
cartridge carrier means in which a plurality of fluid filled cartridges are loaded, said cartridge carrier means having a space therein for receipt of said needle cannula;
a manifold coupled to said cartridge carrier means, said needle cannula releasably retained by said manifold such that the distal end of cannula projects from said manifold in spaced alignment with the cartridges of said cartridge carrier means, said manifold being rotated relative to said cartridge carrier means to cause a corresponding displacement of said cannula;
means for moving said cannula towards and away from said cartridge carrier means, said cannula moved towards said carrier means such that the proximal end of said cannula is placed into fluid communication with a selected cartridge from the plurality of cartridges in said cartridge carrier means, and said cannula moved away from said carrier means and out of fluid communication with the selected cartridge;
means coupled to said cartridge carrier means for expulsing the fluid contents of the selected cartridge so that an injection may be administered by way of the distal end of said cannula when said cannula is in fluid communication with said cartridge;
and
needle releasing means carried by said manifold to release the needle cannula from said manifold and to position said cannula to be received within and shielded by said cartridge carrier means at the space therein after the injection has been administered and said cannula has been moved out of fluid communication with the selected cartridge.

4 more elements

A syringe system having a longitudinally extending axis and comprising:

a needle cannula;
a cartridge carrier within which a plurality of fluid filled cartridges are located;
a manifold coupled to said cartridge carrier and spaced axially from the cartridges located therewithin, said needle cannula retained by and projecting from said manifold such that said cannula is spaced from said cartridges when said manifold is coupled to said cartridge carrier, said manifold being rotated relative to said cartridge carrier to cause a corresponding displacement of said cannula;
means by which to move said manifold axially towards and away from said cartridges, said manifold moved towards said cartridges to cause a corresponding axial movement of said needle cannula towards and into fluid communication with a selected one of said cartridges in said carrier, and said manifold moved away from said cartridges to move said needle cannula away from and out of fluid communication with said cartridge;
a cylinder connected to said cartridge carrier and communicating with the cartridges therewithin;
and
a piston carried on a piston stem and movable through said cylinder for exerting a pressure on said cartridges and thereby causing the fluid within the selected cartridge to be expulsed via said cannula when said cannula is in fluid communication therewith.

4 more elements

Dependencies are inferred from the claim text.