Methods for using front-loading medical fluid injector

摘要

Various sealing structures are used in a front-loading injector, for preventing leakage of spilled fluid from an external surface of a syringe into the vicinity of the drive ram. For example, a sealing gasket may be incorporated into the front face of the injector housing, for mating to the rearward circular edge of the cylindrical body of a syringe. Alternatively, sealing and locking functions may be performed by a single structure on the rearward end of the syringe. Further, leakage may be prevented by including a non-planar sealing flange on the syringe, positioned on the syringe forward of the locking structure, or by a two-piece structure, including a syringe and a separate leakage stopping washer for surrounding the syringe to halt the flow of fluid along the exterior of the syringe. (As part of this aspect, or as an independent feature, the syringe may include an annularly discontinuous flange forward of the locking structure, for providing mechanical support for the syringe against the injector.) Alternatively, an iris-like structure may be incorporated into the front surface of the injector, for closing about the syringe upon insertion of the syringe into the injector.

主权项

1. A method of using a front-loading, medical fluid injector, the method comprising:
rotating a syringe relative to the injector, wherein the rotating is accomplished in opposition to a spring force provided by the injector; and moving an arcuate section of a syringe mounting mechanism of the injector relative to a housing of the injector, wherein the moving is due, at least in part, to the rotating, wherein the arcuate section of the syringe mounting mechanism moves toward the syringe due to rotation of the syringe in a first direction and away from the syringe due to rotation of the syringe in a second direction substantially opposite the first direction.