MEDICAL SYRINGE WITH SAFETY SHIELD SYSTEM

摘要

A medical device for delivering a medicament to a patient includes a syringe assembly having a barrel (24) defining a reservoir containing the medicament, a needle cannula (26) coupled to a forward end of the barrel, and a plunger having a stopper positioned in the barrel and movable into the barrel to cause the medicament to be expelled. The medical device also includes a cap (22) arranged on, and slidable over, the needle cannula from a first position in which the forward tip of the needle cannula is exposed, to a second position in which the forward tip of the needle cannula is covered by the cap. An actuation mechanism connected to the cap includes an urging member coupled to the barrel and the cap for urging the cap toward the second position. A trigger element releasably secures the urging member in a charged state and releasably secures the cap in the first position. The trigger element is actuatable to release the cap by either manual actuation or by interaction with the thumb pad.