Automatically Operable Safety Shield System for Syringes

An automatically operable safety shield system, said safety shield system comprising:

• an inner holder having proximal and distal portions and defining an enclosure into which said syringe may be inserted;
• an outer shield having proximal and distal portions, mounted outwards from said inner holder and being axially movable relative to said inner holder between retracted and extended positions;
• a spring positioned between a first detent on said inner holder and a second detent on said outer shield, and urging said outer shield to its extended position;
• said inner holder having at least one first opening and said outer shield having at least one first stop member, said first stop member being engageable with said first opening when said outer shield is in said retracted position;
• said inner holder having distal to said first opening at least one first indentation, said first stop member being engageable with said first indentation when said outer shield is in said extended position;
• and
• a trigger positioned without said inner holder and axially movable relative to said inner holder such t hat it can contact said first stop member when it is engaged with said first opening and disengage said first stop member from said first opening, allowing said spring to move and outer shield to said extended position,
• a syringe comprising a barrel, a needle, a piston and a plunger rod movable within said barrel, said plunger rod having a protrusion,
• said syringe being operationally coupled to said trigger such that movement of said plunger rod protrusion to contact said trigger causes disengagement of said first stop member from said first opening, allowing said spring to move said outer shield to said extended position;
• wherein said syringe contains the goserelin depot formulation, Zoladex.