Single dose delivery device
First Claim
1. A system for delivering single dose units of medical reagents in fluid form, comprising:
- a chamber including a dry reagent bed having a mass of no more than about 1.0 g;
a compression component in the chamber for exerting pressure upon the reagent bed, wherein the compression component comprises an open cell foam; and
a delivery mechanism integrally connected and downstream of the chamber for delivering the reagent in a liquid.
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Accused Products
Abstract
A microinjection system comprises a device for housing dried forms of medical reagents, such as vaccines, hormones, etc. in single doses. Within a single chamber, a dry reagent bed is provided adjacent a compression component that keeps the bed compacted. In operation, diluent flows through the chamber to carry the reagent out of the chamber in fluid form. In the illustrated embodiments, the fluid carrying reagent is directly delivered from the chamber via a needle. Integral or connectable diluent delivery devices are disclosed for providing an appropriate volume of diluent to the reagent chamber. Unstable formulations of drugs, for example, can be safely stored in dry form. When injection is needed, the drug can be delivered almost instantly in fluid form simply by releasing diluent through the chamber, where the reagent bed is dissolved or suspended while the remaining reagent is continually compacted. The resultant fluid contains a single dose of the reagent and is delivered directly to a patient, desirably without measurement of the fluid form.
103 Citations
31 Claims
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1. A system for delivering single dose units of medical reagents in fluid form, comprising:
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a chamber including a dry reagent bed having a mass of no more than about 1.0 g;
a compression component in the chamber for exerting pressure upon the reagent bed, wherein the compression component comprises an open cell foam; and
a delivery mechanism integrally connected and downstream of the chamber for delivering the reagent in a liquid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A device for delivering small quantities of drugs, comprising:
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a chamber defined between a sealed inlet at an upstream end and a outlet at a downstream end;
a dry reagent bed including at least one bioactive ingredient housed within the chamber;
a spring element biased to compact the dry reagent bed housed within the chamber, wherein the spring element comprises an open cell foam; and
an injection needle integral with the chamber and in fluid communication with the outlet. - View Dependent Claims (16, 17, 18, 19)
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20. A reagent delivery system, comprising:
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a first compartment comprising a diluent;
a second compartment providing a dry reagent therein;
a compacting mechanism in the second compartment for exerting pressure upon the dry reagent, wherein the compacting mechanism comprises an open cell foam;
a barrier separating the first compartment from the second compartment;
a first mechanism for selectively delivering the diluent from the first compartment to the second compartment to form a fluid carrying the reagent; and
a second mechanism for delivering the fluid carrying the reagent outside the system. - View Dependent Claims (21, 22, 23)
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24. A method of preparing and delivering a defined drug dose, comprising:
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converting a dry reagent into a fluid form by flowing a diluent along a laminar flow path through a chamber that houses the dry reagent;
compacting the dry reagent with a compacting mechanism while flowing the diluent through the dry reagent; and
delivering the fluid from the chamber directly into a delivery mechanism in fluid communication with a drug recipient. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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31. A method of delivering a desired dose of reagent in fluid form, comprising:
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providing the desired dose of reagent in dry form;
producing the fluid form by flowing diluent through the reagent in dry form;
compressing the reagent with a compressing mechanism while flowing the diluent through the dry reagent; and
delivering the desired dose to a patient without measuring the fluid form.
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Specification