Inventors:
Lori E. Haedt - Marietta GA
Assignee:
Becton, Dickinson and Company - Franklin Lakes NJ
International Classification:
A61M 532
Abstract:
A method of delivering a blood sample to an evacuated receptacle having a pierceable stopper and a cavity at a subatmospheric pressure, comprising the steps of: a) providing a syringe comprising a barrel having an open proximal end, a distal end and a chamber for retaining fluid, a needle cannula having a sharp distal end and a lumen therethrough connected to the distal end, a safety shield having an open distal end and a cap having an aperture removably connected thereto, the shield slidably mounted over the barrel for telescoping movement from a proximal position where the needle cannula projects through the aperture to a distal position where the shield protectively surrounds the needle cannula, a piston inside the barrel connected to a rigid elongate plunger rod; b) piercing a blood vessel with the needle and drawing blood from the vessel into the chamber by manipulating the plunger rod, c) withdrawing the needle from the vessel; d) moving the shield to the distal needle protecting position; e) removing the cap from the shield; f) inserting evacuated receptacle, stopper first, into the shield until the sharp distal end of the needle cannula pierces stopper and enters the cavity, g) allowing blood to flow from the syringe chamber through the lumen into thecavity of the receptacle; and h) removing the receptacle from the safety shield when the desired amount of blood has entered the cavity of the receptacle from the chamber.