Prefilled, two-constituent syringe

Details Prefilled, two-constituent syringe Prefilled, two-constituent syringe

1995-03-22

1997-06-10

Hafer, Robert A.

Surgery

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

Treating material introduced into or removed from body...

604 86, 604 87, 604 88, A61M 3700

Patent

active

056370873

ABSTRACT:
A prefilled, two-constituent system is provided with a syringe barrel having a dispensing end with an inwardly directed, stationary, piercing cannula. Within the syringe barrel is a first, sealed, collapsible container holding a first constituent at subatmospheric pressure. The first container is slidably disposed within the syringe barrel adjacent the piercing cannula. A second, sealed, collapsible container holding a liquid second constituent is slidably disposed within the syringe barrel spaced from the first container. A carrier is slidably disposed within the syringe barrel between the first and second containers. The carrier has a double-ended, hollow, piercing needle with oppositely extending first and second ends for piercing the first and second containers, respectively. A plunger is slidably mounted within the syringe barrel for applying a force to the second container.

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patent: 5476449 (1995-12-01), Richmond
patent: 5569191 (1996-10-01), Meyer

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