Medical Syringe

A safety syringe for medical use comprising:

• an injection-molded plastic body further comprising a tubular barrel with an inside wall and proximal and distal ends, a cylindrical nose with a forwardly projecting needle holder at the distal end, a finger flange projecting transversely from the barrel near the proximal end, a first cylindrical collar projecting rearwardly from the finger flange to the distal end of the barrel, and two upright wings disposed forwardly of the finger flange, the wings projecting from the barrel and extending forwardly from the finger flange in parallel and spaced-apart relation above the barrel;
• a needle attached to and projecting forwardly from the needle holder, the needle having a distal needle tip;
• a plunger assembly further comprising an elongate plunger handle with proximal and distal ends, the distal end of the plunger handle having an elastomeric plunger seal insertable into the barrel through a rearwardly facing opening in the first cylindrical collar to slidably engage the inside wall of the barrel, and the proximal end of the plunger handle comprising an end cap with a forwardly projecting second cylindrical collar that fits over, surrounds and slidably engages the rearwardly projecting first cylindrical collar of the body and abuts against a rearwardly facing surface of the finger flange when the plunger is fully advanced inside the tubular barrel;
• and
• a longitudinally extending needle safety shield disposed between the wings above and aligned with the barrel, the needle safety shield further comprising an activation handle with proximal and distal ends, the activation handle slidably engaging the body and having an upwardly facing touch surface that facilitates the application of manual pressure by a user to initiate forward sliding movement of the needle safety shield relative to the body to selectively reposition a cylindrical needle guard disposed at its distal end from a first position surrounding the cylindrical nose of the barrel during storage and use of the safety syringe to a second position guarding the needle tip following use of the safety syringe.