Pre-filled retractable needle injection ampoules

Details Pre-filled retractable needle injection ampoules Pre-filled retractable needle injection ampoules

1996-08-20

1998-08-04

McDermott, Corrine M.

Surgery

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

Treating material introduced into or removed from body...

604187, 604201, 604231, 604110, 604203, A61M 528

Patent

active

057886776

ABSTRACT:
An injection device for administration of fluid medication is provided with a retraction mechanism for safety retracting the injection needle after administration of the injection. The device comprises a barrel for receiving a pre-filled medication cartridge containing a supply of fluid medication and sealed by a slidable plug. A plunger is positioned in the barrel. The plunger includes a rear portion for engaging and puncturing the plug, and for holding the plug at a stationary position as the cartridge is merged into the barrel to administer the injection. The player further includes a formal end for releasing the needle for the needle retraction mechanism when the cartridge has been urged into the barrel after the and of an injection stroke.

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