Device for injecting high viscosity material

摘要

A device for injecting a high viscosity material into a cannula, comprising a container being non-compliant and having an outlet adapted to communicate with the cannula for transferring the high viscosity material thereto, a pressure applicator in fluid communication with the container, the pressure applicator defining a fluid flow path through which an incompressible fluid is displaceable, and a material-moving member interrupting the fluid flow path and defining an incompressible fluid receiving portion on one side thereof in communication with the fluid flow path and a high viscosity material receiving portion in communication with the outlet of the container on an opposed side. The material-moving member being displaceable by a pressure of the incompressible fluid acting thereagainst to force the high viscosity material out of the high viscosity material receiving portion of the container and into the cannula.

主权项

1. A device for injecting a high viscosity material into a cannula, comprising:
a container being non-compliant and having an outlet adapted to communicate with the cannula for transferring the high viscosity material thereto; a pressure applicator in fluid communication with the container, the pressure applicator defining a fluid flow path through which an incompressible fluid is displaceable, the pressure applicator having:
a housing having a fluid inlet, a fluid outlet and the fluid flow path defined therebetween, the fluid outlet disposed along the fluid flow path downstream of the fluid inlet and in fluid flow communication with an incompressible fluid receiving portion within the container;the housing of the pressure applicator enclosing at least a first and a second check valve disposed within the housing and in the flow path controlling the fluid flow, the first check valve being downstream of the fluid inlet and the second check valve being upstream of the fluid outlet, each of the first and second check valves permitting only one-way fluid flow therethrough; anda power piston connected to the housing in fluid flow communication with the flow path and having a piston outlet disposed within the housing between the first and second check valves and between the fluid inlet and the fluid outlet, the power piston being repeatedly manually displaceable between an extended position and a depressed position thereof to generate a build-up of pressure within the housing, wherein the power piston generates a negative pressure within the housing to draw the incompressible fluid in through the fluid inlet and the first check valve when displaced from the depressed to the extended position, and the power piston generates a positive pressure within the housing to force the incompressible fluid along the fluid flow path and out through the second check valve and the downstream fluid outlet to the container when displaced from the extended position to the depressed position, the first and second check valves and the power piston acting together to form a manually operated pump; anda pressure relief valve within the housing of the pressure applicator for equalizing pressure in the device, the pressure relief valve being in fluid communication with the incompressible fluid receiving portion for equalizing the pressure therein with atmospheric pressure when the pressure relief valve is activated; and a material-moving member attached to the container and disposed therewithin, the material-moving member including a membrane that is elastically extendable by the pressure of the incompressible fluid acting thereagainst, the membrane interrupting the fluid flow path and defining the incompressible fluid receiving portion on one side thereof and a high viscosity material receiving portion on an opposed side, the incompressible fluid receiving portion being in communication with the fluid flow path of the pressure applicator and the high viscosity material receiving portion being in communication with the outlet of the container, the membrane being displaceable by the pressure of the incompressible fluid acting thereagainst to force the high viscosity material out of the high viscosity material receiving portion of the container and into the cannula.