Patent ID: 8118780
Filing Date: 2012-02-21
Classification: A61M

Abstract:
1. A medical fluid injector, comprising: a syringe including a motor-driven plunger; a control circuit, wherein an output of said control circuit controls movement of said motor-driven plunger; a first pressure transducer operatively connected to said control circuit; a hydraulic syringe actuator operable to actuate said syringe through said control circuit; a conduit extending from said hydraulic syringe actuator to said first pressure transducer; and a fluid within said conduit; said hydraulic syringe actuator being responsive to a control pressure manually exerted by a user on said hydraulic syringe actuator, said first pressure transducer sensing a change in pressure in said conduit produced by application of said control pressure on said hydraulic syringe actuator, and said control circuit being responsive to said sensed pressure change to control movement of said motor-driven plunger.