| 摘要 |
A syringe assembly includes a syringe body having an internal fluid reservoir and a fluid contained within the fluid reservoir and defining a fluid outlet adjacent the distal end thereof, a plunger at least partially disposed within the syringe body and having a plunger rod and a distal plunger head and being adapted for longitudinal movement from an initial retracted position to an actuated advanced position and a dispensing element disposed within the internal fluid reservoir of the syringe body and distal of the plunger head. The dispensing element is dimensioned and arranged to cooperate with the plunger head to permit engagement and advancing movement of the dispensing element during corresponding movement of the plunger head without effecting a coupling relationship with the plunger head whereby the plunger is movable toward the retracted position without causing corresponding movement of the dispensing element.
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