Syringe

Details Syringe Syringe

1991-11-14

1994-11-15

Lewis, Ralph A.

Surgery

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

Treating material introduced into or removed from body...

604 88, 604191, 604416, A61M 500

Patent

active

053643690

ABSTRACT:
A prefilled syringe for one or two component medicaments is based upon the use of a vial containing a medicament or one component of a medicament, the vial having an open bottom closed by a piston. When a flexible extension of the piston is coupled with a tubular plunger, and an adaptor cap having an internal needle and an external connection for a needle is placed over a cap of the vial, the latter is converted into a prefilled syringe. The piston may have an axial passage closed by a resealable septum, so that a separate diluent stored in a flexible capsule may be introduced into the vial through the piston by a double ended needle mounted on a further cap applied to the capsule, the further cap being coupled within the tubular interior of the plunger so that the double ended needle penetrates the septum in the piston. The capsule is pushed forward onto the double ended needle when its contents are to be expelled into the vial. The capsule and its cap are then removed and discarded. In an alternative arrangement, the cap of the capsule is coupled to the adaptor cap and the diluent introduced into the vial through a closure secured by the cap of the vial, after which the capsule is removed from the plunger and the latter is coupled to the piston. In further embodiments, the capsule is replaced by a shell vial. The open bottom of the vial is formed with a strengthening bead designed not to interfere with handling of the vials by conventional vial sterilizing, filling and capping machinery.

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