초록 ▼

An improved syringe incorporating a solid powdered medicament and a dissolving fluid in a compact manner utilizes a compartment for the solid material which may be readily packaged commercially and an arrangement whereby fluid and solid components may be mixed and the latter dissolved while maintain

An improved syringe incorporating a solid powdered medicament and a dissolving fluid in a compact manner utilizes a compartment for the solid material which may be readily packaged commercially and an arrangement whereby fluid and solid components may be mixed and the latter dissolved while maintaining complete hermetically sealed conditions for all components including the injection needle until the latter is ready for injecting into the patient or intravenous device. This is accomplished by a specially constructed tube which surrounds and seals the syringe barrel, injection needle, and medicament and diluent until ready for use. Added features are rigidity, simplicity and economy in manufacture, safety against malfunction and simplicity in operation by customarily trained personnel.

대표청구항 ▼

A completely enclosed compartmental syringe disposed for storing and mixing a powdered medicament and a liquid solvent prior to injection comprising: a container for storage of a predetermined quantity of said powdered medicament; a puncturable seal of elastomeric material engaging an opening in sai

A completely enclosed compartmental syringe disposed for storing and mixing a powdered medicament and a liquid solvent prior to injection comprising: a container for storage of a predetermined quantity of said powdered medicament; a puncturable seal of elastomeric material engaging an opening in said container; a hollow tube projecting from said container and tightly engaging the circumference of said seal; said tube enclosing the entire syringe and forming a hermetically sealed compartment therefor; said tube being made of flexible plastic material; said tube being disposed for limited axial movement along the outside of said seal while maintaining tight contact therewith; a cylindrical syringe barrel slidably positioned within said tube; a removable hermetic seal joining said barrel and said tube; a hypodermic needle having its first end positioned on one end of said barrel within said tube and connecting with the interior of said barrel; a second end of said needle being positioned hermetically against said puncturable seal within said tube and partially penetrating said puncturable seal thus maintaining a seal on the interior of said barrel; a plunger slidably mounted within said barrel; said barrel containing a predetermined amount of said liquid solvent; means for simultaneously advancing said tube and said barrel towards said puncturable seal on said container until said second end of said needle punctures said puncturable seal; means for advancing said plunger in said barrel and discharging said solvent into said container thereby causing said powdered medicament to dissolve; means for withdrawing said plunger thereby sucking such dissolved medicament into said barrel; and means for removing said barrel together with said plunger and said needle from said tube, said tube preventing contact between moving parts of said syringe with the outside atmosphere.