| 摘要 |
An auto-disable syringe ( 50,150 ) is disclosed which prevents re-use of the syringe whatever dose is delivered on the first use. A restrictor bobbin comprises an element ( 1,100 ) which spans the barrel of the syringe and which, after initial distal movement of the plunger ( 52, 152 ) rotates and wedges in the barrel when the plunger is moved proximally. The wedged restrictor bobbin ( 1, 100 ) prevents further substantial proximal movement of the plunger ( 52, 152 ) whilst allowing further distal movement. A small degree of repeated proximal and distal movement is permitted to allow for an aspiration step.
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