Embodiments of a retractable syringe assembly are provided that include a dual syringe barrel configuration. One or more embodiments include reuse prevention features and features that prevent premature activation of the retraction mechanism. Methods for aspirating and expelling liquid from medical devices are also provided.

Embodiments of a retractable syringe assembly are provided that include a dual syringe barrel configuration. One or more embodiments include reuse prevention features and features that prevent premature activation of the retraction mechanism. Methods for aspirating and expelling liquid from medical devices are also provided.

A storage device (30) for storing a pen needle assembly (10) includes a housing (30) having first wells (44) with a dimension for receiving the pen needle assembly and second wells (46) for receiving an inner shield (24) of the pen needle assembly. The second wells (46) have a diameter less than a diameter of the first wells (44). An ejector (40) in the housing (34) can be actuated to eject the used needle hub (16) and outer covers (22) from the first well (44) and the inner shield (24) from the second well (46) for disposal. A method of coupling a pen needle delivery device to a needle hub is also provided.

Embodiments of a retractable syringe assembly are provided that include a dual syringe barrel configuration. One or more embodiments include reuse prevention features and features that prevent premature activation of the retraction mechanism. Methods for aspirating and expelling liquid from medical devices are also provided.

A needle attachment and detachment assist device includes a frame body, a syringe guide jig, and a needle guide jig. A guide hole is formed in the syringe guide jig. In the needle guide jig, a needle insertion hole is formed on a central axis of the guide hole. The needle insertion hole includes a center hole portion and a rib guide groove. When a syringe is inserted into the guide hole, and a needle member is further inserted into the needle insertion hole, rotation prevention of the needle member is achieved. In this state, when the syringe is rotated in a first direction, the needle member can be clamped to a thread portion of the syringe. When the syringe is rotated in a second direction, the needle member can be loosened.

Provided is a needle removal operation cover with which a user can safely perform an injection needle removal operation even when a needle tip is directly inserted into the needle removal operation cover, and with which the user can remove the injection needle without requiring a wrist twisting motion. In a needle removal operation cover which is configured such that an injection needle which is detachably and threadedly mounted on a distal end of an injection cylinder is threadedly removed by rotating the injection needle, the needle removal operation cover is formed in a cylindrical shape such that a needle tube of the injection needle including a needle tip is accommodated in the needle removal operation cover and integral mounting of a needle hub in the needle removal operation cover is allowed, a flange body for a rotating operation is formed on a cylindrical outer peripheral surface in a projecting manner, an outer periphery of the flange body is formed of a plurality of continuous mountain-like ridge portions, and among the mountain-like ridge portions, the mountain-like ridge portions which correspond to a rotational direction along which the injection needle is released from the injection cylinder are formed into a shape which allows easy engagement of a finger for an operation with the ridge portions.

A medical device attachable to the front of a conventional syringe and having a hub assembly selectively attachable to the syringe, a nose projecting forwardly from the hub assembly, a rearwardly biased needle retraction mechanism seated inside the nose, a retractable needle projecting forwardly of the nose, and a fluid flow path from the fluid chamber through the hub assembly, nose, needle retraction assembly and needle, wherein the needle is retracted into the nose and a retraction tube external to the syringe by rotating the syringe relative to the nose.

One embodiment is directed to a system for injecting, comprising a syringe body defining an interior medicine chamber; a stopper member configured to be inserted into the interior medicine chamber to contain medicine within the medicine chamber; a plunger member configured to be manually manipulated to insert the stopper member relative to the syringe body; and a needle having proximal and distal ends, the proximal end comprising an anchoring geometry configured to be at least partially inserted into the stopper member such that upon retraction of the stopper member, the needle is pulled proximally along with the stopper to be at least partially contained within the interior medicine chamber.

An apparatus and method of automatically and safely removing a needle from a syringe assembly while retaining a syringe hub as part of the syringe assembly is generally described. A needle containment device is provided, which may include a needle handling apparatus and a shutter mechanism assembly. The needle handling apparatus is configured for receiving at least a portion of a syringe assembly including at least a needle and a syringe hub, wherein a first clamping mechanism is configured to clamp the syringe hub and a second clamping mechanism is configured to clamp the needle, so that the needle is safely and automatically removed from the syringe hub.

One embodiment is directed to a system for injecting, comprising a syringe body defining an interior medicine chamber; a stopper member configured to be inserted into the interior medicine chamber to contain medicine within the medicine chamber; a plunger member configured to be manually manipulated to insert the stopper member relative to the syringe body; and a needle having proximal and distal ends, the proximal end comprising an anchoring geometry configured to be at least partially inserted into the stopper member such that upon retraction of the stopper member, the needle is pulled proximally along with the stopper to be at least partially contained within the interior medicine chamber.