A fluid injector including an injector housing with at least one syringe port for receiving a syringe, and a locking mechanism associated with the at least one syringe port for securing the syringe within the at least one syringe port. The locking mechanism is configured for engaging at least one syringe retaining member of the syringe to releasably lock the syringe within the at least one syringe port. The at least one syringe retaining member rotationally guides the syringe into self-orienting alignment with the locking mechanism and is rotated by the locking mechanism into fully locked position after axial installation of the syringe into the at least one syringe port. The locking mechanism also axially ejects the syringe from the locking mechanism upon rotation of the syringe during removal.

A system for mixing drug products and injecting includes a syringe body, proximal and distal stopper members disposed in the syringe body, a plunger member, and a needle hub assembly coupled to the distal needle interface of the syringe body. The proximal and distal stopper members form a proximal drug chamber between there between and a distal drug chamber between the distal stopper member and a distal end of the syringe body. The plunger member includes a needle retention feature, an energy-storage member, and an energy-storage member latching member all disposed in disposed in a plunger interior. First and second sizes of the respective proximal and distal drug chambers can be modified by movement of the proximal and distal stopper members relative to the syringe body. The needle is at least partially retractable into plunger interior upon manipulation of the plunger member relative to the syringe body.

Apparatus for use with medication in fluid form, which is particularly beneficial for medications having a relatively high viscosity. The disclosed syringe adapter has an opening that is relatively large, as compared to a conventional needle, and thus affixing the disclosed syringe adapter to a syringe improves syringeability of higher-viscosity medications. When the disclosed syringe adapter is affixed to a pistol-grip or tab-handled syringe, the medication withdrawn into the pistol-grip syringe can be more easily administered from the syringe barrel. In some embodiments, the syringe adapter will be replaced with a needle prior to injecting the medication, while in some other embodiments, the needle is affixed to the in-place syringe adapter for the injection. In yet other embodiments, the needle is affixed to a needle holder that, in turn, is affixed to the in-place syringe adapter for the injection.

The present invention relates to a syringe with an improved needle retraction mechanism, comprising: (a) a cylindrical barrel, (b) a needle holder, (c) a hollow plunger, (d) a rod, (e) an extractor element, and (f) a recovery tension or compression spring, the extractor element being movably displaceable from an advanced position to a retracted position, said extractor element having a male protrusion to engage the internal cavity of the needle holder to join the extractor element to the needle holder, and hooking means defining a connection between the plunger and the extractor element, and wherein the axial hole of the plunger is defined by a plurality of bendable flanges which are configured to slide over the needle holder, said bendable flanges thereby bending outwardly and expanding the axial hole of the plunger, and whereby the extractor element is disconnected from said plunger and is retracted towards its retracted position. The present invention also relates to a syringe kit wherein the syringe is provided with an improved needle retraction mechanism as described herein.

To prevent accidental needle stick injuries, a syringe has a plunger configured to pull the syringe needle into the syringe barrel after clinical use. The syringe has an additional safety feature that restricts subsequent movement of the plunger. After the needle is pulled entirely into the barrel, movement of the plunger is restricted by a notch on the barrel to prevent the needle tip from being pushed accidentally through the barrel wall.

Needle assemblies for retractable needle syringes include a needle, a needle seal, and a needle retainer, wherein the needle includes one or more barbs substantially at its proximal end. The needle retainer engages an optional needle-over-mold component that is fixedly attached to the needle. The needle-over-mold may be connected to the distal surface of the needle seal and may travel, such as by being a couple component, with the needle during the operation of the syringe. A safety syringe includes a barrel having a needle assembly mounted at a distal end and a plunger assembly mounted at a proximal end. A drug may be contained in a drug chamber of barrel, between the plunger assembly and needle assembly, proximally of the needle seal for drug delivery to a user. The plunger assembly includes a plunger seal having a needle-engaging portion to capture the needle at the barb for retraction.

One embodiment is directed to a safety syringe system, comprising: an off-the-shelf syringe assembly comprising a syringe body and a plunger tip; a needle assembly removably coupleable to the distal end of the syringe body such that medicinal fluid may be transferred through a retractable needle coupled to a needle housing comprising the needle assembly upon insertion of the plunger tip relative to the syringe body; and a plunger control assembly coupled to the plunger tip and configured to facilitate manual insertion of the plunger tip relative to the syringe body; wherein upon insertion of the plunger tip to a final insertion state and release of an associated manual insertion load, the plunger tip may be proximally withdrawn, pulling the retractable needle proximally relative to the needle housing to a safe locked and retracted state wherein it is no longer exposed for injection.

A system for serially injecting liquids includes a syringe body, proximal and distal stopper members disposed in the syringe body, a first liquid in a distal chamber, a second liquid in a proximal chamber, a plunger member, and a needle hub assembly coupled to a distal needle interface of the syringe body. The plunger member includes a needle retention feature disposed in a plunger interior, an energy-storage member disposed in the plunger interior, and an energy-storage member latching member disposed in the plunger interior. The needle assembly includes a needle having a needle proximal end feature, a hub, and a needle latching member configured to couple the needle to the hub. Manipulating the plunger member to insert the proximal stopper member distally relative to the syringe body initially expels the first liquid, then the second liquid. The needle is at least partially retractable into plunger interior.

A package comprising a container for holding a first sub-stance, and a product insert for holding a second substance, at least partially inserted info said container, and where the first product and the second product can be allowed to merge by external manipulation of said package. Packaged products and methods are also provided.

A system for injecting includes a syringe body defining a proximal opening and a distal needle interface. The system also includes a plunger member defining a plunger interior and configured to be manually manipulated to insert a stopper member relative to the syringe body. The plunger member includes a needle retention feature disposed in the plunger interior, an energy-storage member disposed in the plunger interior, and an energy-storage member latching member disposed in the plunger interior. The system further includes a needle hub assembly coupled to the distal needle interface of the syringe body. The needle assembly includes a needle having a needle proximal end feature, a hub, and a needle latching member configured to couple the needle to the hub. The needle is retractable into plunger interior upon manipulation of the plunger member to actuate the energy-storage member latching member.