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Refillable body powered drug delivery techniques

  • US 5,798,114 A
  • Filed: 04/30/1996
  • Issued: 08/25/1998
  • Est. Priority Date: 04/30/1996
  • Status: Expired due to Term
First Claim
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1. An implantable and refillable dispensing device for delivering a treatment agent to a body comprising in combination:

  • a first chamber for holding said treatment agent;

    a conduit between said first chamber and said body;

    a second chamber for holding a delivery agent;

    means for applying pressure to said first chamber due to changes in volume of said delivery agent in said second chamber so that said treatment agent is delivered through said conduit to said body;

    septum means for facilitating the introduction of treatment agent into said first chamber and for facilitating the removal of delivery agent from said second chamber, whereby said treatment agent can be introduced into said first chamber and said delivery fluid can be withdrawn from said second chamber using a rejuvenating device, while said dispensing device remains implanted in the body.

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