Fine needle aspiration safety syringe

摘要: The invention comprises a needle aspiration safety syringe having barrel, plunger, retractable needle, and delayed engagement mechanism. is functionally connected to the plunger by mechanism such that when retracted from an initial extended position, does not retract immediately. provides passage into fluid receiving cavity, retraction of causes tissue flow target through cavity. Further engage, whereupon can be withdrawn completely sharp end no longer exposed. After withdraws cannot exit poses danger sticking user or patient. Fluids stored in discharged port depressing plunger. When depressed discharge collected fluid, deforms inside barrel.