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Infusion apparatus and method

  • US 4,193,397 A
  • Filed: 02/05/1979
  • Issued: 03/18/1980
  • Est. Priority Date: 12/01/1977
  • Status: Expired due to Term
First Claim
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1. Nonelectrical implantable infusion apparatus comprising:

  • A. a housing;

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

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

    D. a second collapsible infusate reservoir having an outlet and positioned in the housing;

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

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

    G. a first flow path having a first flow restriction characteristic connected betweem said first reservoir and said mixing means;

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

    I. a normally closed valve connected in said second flow path so that infusate flows from said second reservoir to the mixing means only when said valve is opened, the infusates from said first and second reservoirs, when said valve is opened, supplementing one another in the mixing means to produce an integrated dosage, andJ. a fluid outlet from said mixing means for conducting said integrated dosage to an infusion site.

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