FIELD: medical equipment, in particular, disposable syringe with retractable needle and piston.
SUBSTANCE: disposable syringe with retractable needle has syringe casing cooperating with piston and having at least one step, which may be joined with retractable needle. Piston is adapted for engagement with retractable needle for retraction of needle and comprises multiplicity of interconnected slots, which may be slidingly joined with at least one step for rotating said piston, and additionally comprises motion restricting device adapted for restricting sliding motion and preventing syringe from repeated usage.
EFFECT: increased efficiency owing to eliminating the possibility of unintentional infecting contact with needle.
25 cl, 15 dwg
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