Sterile Hypodermic Syringes for Single Use: Part1: Syringes for manual use DIN EN IS0 7886-1
12 Piston/plunger assembly 12.1 Design The design of the plunger and push-button of the syringe shall be such that, when the barrel is held in one hand, the plunger can be depressed by the thumb of that hand. When tested in accordance with annex B , the piston shall not become detached from the plunger….