Needle devices with bistable neddle guard structure and related methods

摘要: A needle device having a guard (122) located in first hub (152) mounted over (104) second (154), shaft, tip (110) and change profile (128) proximal of the (110). The has wall (126) perimeter defining an opening therein, arm (20) extending distally from (126), (30) opposite (20). are spaced ready to use position. (20), (30), or both arms cover protective position when is triggered by activator (140).