Nadelanordnung für Subkutaninjektionen

摘要

A needle-syringe assembly is comprised of an elongated, generally cylindrical barrel forming a hollow nozzle located at the distal end of the barrel and opening into the interior of said barrel. A plunger is slidably mounted in the barrel and forms a longitudinal cavity. A needle holder carries a hollow needle on the distal end thereof, the needle holder being slidably mounted in said longitudinal cavity of the plunger. The needle holder includes a lateral arm extending laterally through the plunger cavity to the barrel. Guide means form a guide surface extending along a proximal end portion of the barrel for engaging the lateral arm of the needle holder and retracting the needle holder within the barrel in response to relative rotational movement between the barrel and the needle holder.