Patent ID: 7267661

Claim:
An IV infusion delivery apparatus for operation in an MRI environment, the apparatus comprising: a linear peristaltic pump constructed of non-magnetic material disposed to receive a liquid conduit linearly oriented therein and to transfer liquid through the liquid conduit from a liquid IV container source in response to mechanical motion of a plurality of pump elements; an ultrasonic actuator constructed of non-magnetic material disposed within an electrically conductive structure and coupled to provide mechanical movement to the pump in response to applied multiphasic electrical signals to provide positive displacement of the IV liquid from the IV container source; a sensor that detects the mechanical motion of at least one of the plurality of pump elements to produce an output signal indicative thereof; a sensor disposed to produce an output signal indicative of liquid flow pumped through the pumping structure; and a controller including a central processing unit and memory that stores operating programs disposed within an electrically conductive structure and constructed of non-magnetic material for operation in an MRI environment, the controller communicating with the sensors to receive the output signals therefrom, and with the ultrasonic actuator to selectively energize the actuator to drive the pump, and thereby transfer liquid from the IV container source through the liquid conduit at a controllable volumetric rate.