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Adjustable implantable drug infusion system

  • US 5,061,242 A
  • Filed: 07/18/1989
  • Issued: 10/29/1991
  • Est. Priority Date: 07/18/1989
  • Status: Expired due to Term
First Claim
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1. A drug delivery system for implantation in a living body comprising:

  • a pressure actuated drug delivery device having a housing, a movable member dividing said housing into two compartments, a first compartment containing a drug to be dispensed and a second compartment containing a material exerting pressure on said movable member, means for providing access to said first compartment for refilling it with a drug;

    an adjustable pressure sensitive flow regulator connected to said first compartment, said flow regulator comprising a body, an inlet from said first compartment and an outlet to a catheter said outlet mounted in said body and movable thereto, a cavity divided by a flexible sensing member to define two chambers, one chamber on each side of said flexible sensing member, means to establish fluid communication between said two chambers, one of said chambers in fluid communication with said outlet, said means to move said outlet with respect to said flexible sensing member for adjusting the flow rate to said outlet from said other of said chambers such that said regulator flow is variably adjustable to any predetermined rate.

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