Patent ID: 6945954

Claim:
An electronic device for selectively injecting or withdrawing fluid from a patient's body comprising: a reservoir for injecting or collecting said fluid; a fluid delivery system having a first end coupled to said reservoir and a second end adapted to be inserted into the patient's body; an electrical drive mechanism arranged and constructed to apply a force within said reservoir in response to commands in one of a first direction in which fluid is injected from said reservoir through said fluid delivery system into the patient and a second direction in which fluid is withdrawn from patient through said fluid delivery system; a sensor coupled to one of said reservoir, fluid delivery system and electrical drive mechanism for sensing an internal parameter indicative of a force generated by said drive mechanism and internal resistances within said reservoir and said fluid delivery system to said force; a controller coupled to said sensor and said electrical drive mechanism and generating commands for said electrical drive mechanism in accordance with a profile defining operational parameters including a flow rate for said drive mechanism and a peak pressure; said controller including a calculating an entry/exit pressure at said second end as a function of said internal parameter, said controller generating further commands to said electrical drive mechanism to control said entry/exit pressure; a memory holding a plurality of profiles, each profile defining a surgical procedure; and a profile selector for selecting one of said profiles for said controller.