METHOD OF MAKING A RETRACTING NEEDLE SYRINGE

摘要

A method of making a retracting needle assembly for use with a syringe barrel having a cylindrical collar and a plunger having a release element wi th a sharp distal end includes an outer hub having a passageway therethrough and an inner hub having a proximal end, a distal end and a conduit therethrough. The proximal end of the inner hub has an inner portion and a dissociable out er portion connected to the inner portion. The dissociable outer portion is further connected to the outer hub. The distal end of the inner hub is smaller than the passageway of the outer hub at the distal end of the outer hub and projects distally outwardly therefrom. A needle cannula having a distal end, a proxim al end, and a lumen therethrough is connected to the inner hub so that the lume n is in fluid communication with the conduit. An energized spring is contained between the inner and outer hub. Structure is provided for connecting the outer hub to the collar of the syringe barrel.