RETRACTABLE SINGLE-USE SYRINGE WITH COMPULSORILY HELD NEEDLE Russian patent published in 2006 - IPC A61M5/32 A61M5/50 

FIELD: medical engineering.

SUBSTANCE: device has chamber for holding needle. The chamber is set in motion with a handle does not allow the needle to be drawn-out from the syringe. The device has elongated hollow cylinder, retractable needle, movable pieces and compulsory-locking structural unit. The elongated hollow cylinder has frontal end and open rear part. The retractable needle is pulled-in by means of drawing-in structural unit mounted on the frontal syringe cylinder end. The needle is displaceable when being drawn-back. Movable parts have a handle attached to the chamber holding the needle. The movable parts are sealed, sliding and movable in the syringe cylinder by means of the handle going-out from the open rear syringe part. The chamber for holding needle has opening corked orifice in the frontal part for receiving the retractable needle. The needle is pullable into the chamber fro holding the needle when moving the chamber forward to the drawing-in structural unit as a response to handle displacement after finishing injection. The compulsory-locking structural unit is mounted inside the syringe cylinder and restricts return movement of the chamber holding the needle for preventing its being drawn-out from the syringe cylinder after its single use. The retractable needle is safely enclosed in the chamber for holding the needle inside the syringe not allowing its being drawn-out by operating the handle or by pulling the handle.

EFFECT: high safety level; impossible repeated application irrespectively of the needle being drawn-in or not.

34 cl, 19 dwg