Patent ID: 8430843

Claim:
A diluent/medication mixing syringe assembly comprising: a syringe body having an inner wall, an open proximal end, and a distal end opposite the proximal end having a fluid outlet; a plunger assembly including a plunger body and a plunger head extending from a distal end of the plunger body, the plunger head slidably and sealingly engaging the inner wall of the syringe body, the plunger head, the distal end of the syringe body and the inner wall between the plunger head and distal end defining a reservoir within the syringe body, the plunger head and the plunger body having a longitudinal bore extending therethrough; a cannula extending through the bore extending through the plunger head and the plunger body, the cannula having a longitudinal channel extending through the plunger assembly and into the reservoir; a mixing element secured to a distal end of the cannula and positioned in the reservoir; and a sealing member positioned in the longitudinal bore of the plunger body around the cannula, the sealing member being formed of a resilient material and configured to seal the longitudinal bore when a proximal portion of the cannula is removed from the longitudinal bore.