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VALVELESS IMPEDANCE PUMP DRUG DELIVERY SYSTEMS

  • US 20090209945A1
  • Filed: 01/19/2009
  • Published: 08/20/2009
  • Est. Priority Date: 01/18/2008
  • Status: Abandoned Application
First Claim
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1. An implant unit, comprising:

  • a pump chamber including a flexible wall, an inlet opening and an outlet opening;

    a force-transferring member configured to compress the flexible wall at an actuation position, wherein the actuation positiongenerally defines a first sub-chamber located between the inlet opening and the actuation position and a second sub-chamber located between the outlet opening and the actuation position, andis located such that compression of the flexible wall at the actuation location while a fluid is in the pump chamber results in a higher fluid pressure in the first sub-chamber relative to the second sub-chamber and a net fluid flow through the pump chamber; and

    a housing sized for implantation in a living human or other animal and separating an internal space containing the pump chamber and the force-transferring member from an exterior, the housing including an external surface facing the exterior and formed from a biocompatible material, a first housing opening in fluid communication with the pump chamber inlet and a second housing opening in fluid communication with the pump chamber outlet.

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