Two-compartment type prefilled syringe

Details Two-compartment type prefilled syringe Two-compartment type prefilled syringe

1998-01-14

1999-08-10

Coggins, Wynn Wood

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604 89, 604 90, 604181, 604187, 604232, A61M 3700

Patent

active

059351012

ABSTRACT:
A two-compartment type prefilled syringe includes a first rubber stopper fitted into a front sleeve, a second rubber stopper fitted into a rear end portion of a cartridge, a third rubber stopper for hermetically dividing the interior of the cartridge into front and rear compartments and a bypass formed by radially outwardly bulging a portion of a peripheral wall of the cartridge. In an axial direction of the cartridge, a length of the third rubber stopper is slightly smaller than an inner length of the bypass. When the third rubber stopper has been displaced into the bypass, the sealing property of the rear compartment with the front compartment is cancelled such that the dissolving agent, suspension or the like in the rear compartment is carried, via the bypass, into the front compartment containing dry medicament or the like. A ratio of a maximum width of one end of the bypass adjacent to the front sleeve to a maximum width of the other end of the bypass adjacent to the rear end portion of the cartridge is set to range from 1.2 to 5.0.

REFERENCES:
patent: 4792329 (1988-12-01), Schreuder

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