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Infusion apparatus and method

  • US 4,258,711 A
  • Filed: 09/17/1979
  • Issued: 03/31/1981
  • Est. Priority Date: 02/05/1979
  • Status: Expired due to Term
First Claim
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1. Non-electrical implantable infusion apparatus comprisingA. a housing;

  • B. a collapsible infusate reservoir having an outlet and positioned inside the housing;

    C. means for collapsing said reservoir to expel infusate from its said outlet;

    D. mixing means inside the housing and having a selected volume;

    E. a first flow path having a selected flow restriction characteristic connected between said reservoir and said mixing means;

    F. a second flow path having a selected flow restriction characteristic connected between said reservoir and said mixing means;

    G. a normally closed valve connected in the second flow path so that infusate flows from the reservoir to the mixing means along the second path only when said valve is opened, the infusates flowing along said first and second paths when said valve is opened supplementing one another in the mixing means to produce an integrated dosage, andH. a fluid outlet from the mixing means for conducting said integrated dosage out of the housing to an infusion site.

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