Disposable front loadable syringe and injector

Abstract

A syringe for an injector that has at its nozzle end a connection to the fluid delivery tubing that prevents, reduces, or eliminates fluid leaks, by virtue of a ridge on the external surfaces of the connector which engage to tubing. Furthermore, the syringe and injector are configured to permit the syringe to be oriented in more than one manner on the injector.

Description

FIELD OF THE INVENTION [0001] The present invention relates to disposable replacement syringes for patient fluid injectors and adapters for a fluid injector to accept the syringe. BACKGROUND OF THE INVENTION [0002] Injectors are devices that expel fluid, such as contrasting media, from a syringe and through a tube into a patient. The injectors are provided with an injector unit, usually adjustably fixed to a stand or support, having a drive that couples to the plunger of the syringe to drive it forward to expel fluid into the tube, or that may be driven rearward to draw fluid into the syringe to fill it. Usually the syringe is a disposable replacement type. [0003] In the injection phase where the plunger is driven forward, pressures are developed in the syringe that range from, for example, 25 psi for some applications to over 1000 to 1200 psi for other, applications. Syringes that contain fluid under the higher range of pressures are expensive and therefore can be impractical where...

AI Technical Summary

Benefits of technology

[0006] The present invention provides injectors, syringe interfaces and syringes that address the needs for rapid loading of syringes and the prevention or elimination of fluid leaks between the syringe nozzle and fluid delivery tubing connection, a Luer lock connection. Specifically, the present invention provides a syringe for an injector that has at its nozzle end a connection to the fluid delivery tubing that prevents, reduces, or eliminates fluid leaks. The syringe can also be oriented in more than one manner on the injector.

[0008] An objective of the present invention to provide a method and apparatus by which replaceable syringes can be more efficiently loaded into and unloaded from injectors.

[0009] Another objective of the present invention is to provide an injector with a replacement syringe and a method of replacing the syringe in the injector that provides a more efficient replacement of the syringes in the injector.

[0010] A further objective of the present invention is to provide a replaceable syringe and method of syringe replacement with which the replacement of the syringe can be achieved with simple motions by the operator or with rapid operation of injector unit mechanisms.

[0011] An additional objective of the present invention is to provide a replaceable syringe positive, rapid and reliable engagement of the syringe with locking structure that holds the syringe in the jacket, engagement of the plunger drive and plunger drive coupling, or connection of the injection tube to the outlet of the syringe.

[0012] Another objective of the present invention is to provide an injector and syringe arrangement that minimizes or eliminates the probability of spillage or leakage from the syringe nozzle flowing into the injector equipment, and otherwise enhancing the ability to maintain sterility and cleanliness of the equipment.

Problems solved by technology

Syringes that contain fluid under the higher range of pressures are expensive and therefore can be impractical where the syringes are disposable.

This required orientation hinders rapid attachment and replacement of the syringe.

In addition, although the Luer connection, syringe / tubing connection, described in the above patents may be adequate for injector applications that use low pressures, leaks often occur when high pressure applications are used.

Over-tightened Luer connectors sometimes crack which compromises the seal.

Another problem is that sometimes the connection sticks and the Luer lock cannot be disassembled.

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