Single dose delivery device

A device for delivering small quantities of drugs, comprising:

• 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.

A reagent delivery system, comprising:

• 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.

A method of preparing and delivering a defined drug dose, comprising:

• 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.

A method of delivering a desired dose of reagent in fluid form, comprising:

• 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.