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Drug delivery system with profiles

  • US 6,945,954 B2
  • Filed: 01/22/2001
  • Issued: 09/20/2005
  • Est. Priority Date: 04/10/1998
  • Status: Expired due to Term
First Claim
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1. 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from said reservoir through said fluid delivery system into the patient and a second direction in which fluid is withdrawn from patient through said fluid delivery system;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.

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