Apparatus and method for providing a suspended agent

An apparatus for maintaining an agent contained in a syringe in suspension the syringe having an axis and comprising a barrel holding the agent and a plunger mounted in the barrel, comprising:

• a threaded spindle having an axis;
• a rotary motor operably connected to said threaded spindle for rotating said spindle about one of the axis of the syringe or the axis of the spindle;
• a holder having a first portion attached to the syringe and a second portion extending away from the syringe to attach to the threaded spindle;
• and
• a force-exerting member mounted on said spindle, said force-exerting member configured to selectively exert a force upon the plunger sufficient to advance the plunger during rotation of the syringe for providing agent from the syringe while the agent is maintained in suspension.

An apparatus for maintaining an agent contained in a container in suspension, wherein the container has an actuator operable for providing the agent from the container, the apparatus comprising:

• a housing for the container having a cylindrical wall and an axis;
• an inner member positioned within the interior of said cylindrical wall and configured to receive and hold the container, said inner member adapted to rotatably move about said axis of said housing;
• and
• a motor operably coupled to said inner member for rotation of the inner member, wherein said inner member is operably coupled to the actuator of the container for providing the agent from the container and the agent in the container is maintained in suspension by the rotation of the inner member.