Insertable element for preventing reuse of plastic syringes

Details Insertable element for preventing reuse of plastic syringes Insertable element for preventing reuse of plastic syringes

A - Human Necessities

61

M

A61M 5/50 (2006.01)

Patent

CA 2060177

A locking device for preventing reuse of a plastic syringe is formed as a barbed element which can be inserted in the open end of the syringe between the inner surface of the syringe wall and the plunger stem. The barbed element has at least a first barbed point (11, 31) for engaging it in a fixed position in either the plunger stem or the syringe wall, and at least a second barbed (12, 32) point which is angled so as to be slidable along the other of the plunger stem or syringe wall in the direction toward the injection end (21, 41) and to be fixedly engageable therein in the opposite direction away from the injection end (21, 41) whereby retraction of the plunger (20, 40) after once depressing it toward the injection end (21, 41) is thereby prevented. The preferred em- bodiments of the locking device are formed from a single metal blank, and have a spring-type or a clip-type body portion for holding or clipping the device in position on the plunger stem.

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