| 摘要 |
The device for injecting a high viscosity material into a cannula includes a body having a material-moving member disposed therewithin which separates the body into a first cavity adapted to receive an incompressible fluid and a second cavity adapted to receive a high viscosity material. A pressure applicator, including a housing having incompressible fluid, is remote from but connected to the body by an extension line providing fluid flow between a fluid outlet of the pressure applicator and the first cavity. First and second check valves within the housing control the flow through the housing. The power piston generates negative pressure within the housing to draw the incompressible fluid in when the piston is extended, and generates positive pressure within the housing, forcing the incompressible fluid out through the second check valve and the fluid outlet and into the first cavity of the non-compliant body, when the piston is depressed. |
| 主权项 |
1. A device for injecting a high viscosity material into a cannula, comprising:
a non-compliant body having a material-moving member disposed therewithin, the material moving member separating the non-compliant body into a first cavity having a first volume adapted to receive an incompressible fluid and a second cavity having a second volume adapted to receive a high viscosity material, the material-moving member being displaceable by a pressure of the incompressible fluid acting thereagainst to vary the first and second volumes inversely proportionally; and a pressure applicator including a housing receiving the incompressible fluid and defining a fluid flow path therethrough, the housing having a fluid outlet of the fluid flow path in fluid flow communication with the non-compliant body, the pressure applicator being remote from the non-compliant body and fluidicly connected thereto by a non-compliant extension line providing fluid flow communication therebetween the fluid outlet of the pressure applicator and the first cavity of the non-compliant body, the pressure applicator forcing the incompressible fluid into the first cavity of the non-compliant body to displace the material-moving member, thereby increasing the first volume, decreasing the second volume, and ejecting the high viscosity material out of the non-compliant body, the pressure applicator further including:
at least a first and a second check valve disposed within the housing upstream of the fluid outlet and in the flow path to control the fluid flow through the housing, 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 upstream of the fluid outlet, the power piston generating a negative pressure within the housing to draw the incompressible fluid in through the fluid inlet and the first check valve when the power piston is displaced from a depressed position to an extended position thereof, and the power piston generating 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 and into the first cavity of the non-compliant body when displaced from the extended position to the depressed position, the power piston being repeatedly manually displaceable between the extended position and the depressed position to generate a build-up of pressure within the housing, thereby forming a manually operated pump. |
