A drug delivery device according to an embodiment may include a body including an opening; a magnetic element disposed in the body; a reservoir disposed in the body, connected to the magnetic element, and configured to store a drug; and an opening/closing structure coupled to the body and configured to open or close the opening.

A self-retracting syringe has an injection assembly and a retraction assembly. The injection assembly has a housing, a spring rest, and a spring that is restrained initially in compression between the housing and the spring rest. A plunger rod is disposed inside the coil of the spring. A coupler in contact with the spring rest and the plunger rod releasably couples the plunger rod to the spring rest. When a latch is released, the plunger rod moves distally to urge a seal forward, which seal movement causes a hypodermic needle to extend and a medicament to be expelled through the hypodermic needle. A retraction assembly returns the hypodermic needle into the syringe body after the medicament is expelled. Embodiments of retraction assembly provide an inlet through which fluid may be introduced into the syringe through said hypodermic needle. Methods for filling the syringe are also described.

Disclosed is a safety syringe that comprises a needle sleeve (1), a needle base (3) and a core rod (2). First claws (34) on the needle base (3) are configured to clamp in a first groove (111) on an inner wall of the needle sleeve (1), one of a proximal end of the needle base (3) and a distal end of the core rod (2) is provided with second claws (33), and the other one thereof is provided with a position-limiting member; the second claws (33) are configured to abut against the position-limiting member along a slanted surface. When the core rod (2) slides towards a distal side to perform injection, the second claws (33) are forced to slide along the slanted surface to pass over the position-limiting member and become hooked onto the position-limiting member, thereby realizing interlocking of the needle base (3) and the core rod (2), and during this process, the core rod (2) slides to drive the first claws (34) to slip out of the first groove (111); or when the core rod (2) retracts, the core rod (2) exerts a pulling force on the needle base (2) towards the proximal side so as to force the first claws (34) to slip out of the first groove (111); the needle base (3) slides towards the proximal side together with the core rod (2), thereby simplifying the structure of the safety syringe.

An ocular implantation device comprises a housing having a longitudinal axis, a needle configured to receive an implant, and a plunger and a rod operatively coupled together. The plunger and the rod are disposed in the housing and are collectively, translationally moveable along the longitudinal axis of the housing. The rod is configured to be receivable within at least a portion of the needle to enable the rod to move the implant therethrough. An actuator is operatively engaged with the plunger such that movement of the actuator in a direction aligned with the longitudinal axis of the housing results in the translational movement of the plunger and the rod along the longitudinal axis of the housing in order to deliver the implant through the needle to a target site. An alternative embodiment of an ocular implantation device uses a retractable needle to deliver an implant.

A retractable needle assembly includes a housing having a sidewall defining a hollow bore, and an elongate plunger, the distal end of the plunger forming a reservoir within the hollow bore for containing a fluid therein. The plunger is adapted for slideable movement within the hollow bore. The assembly includes a hub disposed within the hollow bore and at least partially supporting a cannula therewith, and a needle retraction member engaged with the hub for manually selectable advancement with respect to a portion of the housing. The needle retraction member may be advanced from an initial position in which at least a portion of the needle is disposed outside the housing, to a retracted position in which the needle is fully surrounded by the housing. The elongate plunger may be advanced about the hub for extracting the fluid into the reservoir or expelling the fluid from the reservoir.

A medical safety needle includes a needle body having a needlepoint, a covering body having a detent portion slidable on the needle body to catch the needlepoint so as to cover the needlepoint, and a resilient cantilever supporting the detent portion, a collar portion slidably fitting on the covering body, which is configured to get in contact with the cantilever to press the cantilever radially inwardly, and a housing being formed in a unitary body with the collar portion or having an end face on which the collar portion is capable of being seated, the housing being configured to carry the covering body from a first position to have the needlepoint exposed to a second position to have the needlepoint covered by the covering body.

A handheld cryoanesthesia or analgesia device for cooling a target area on cutaneous membranes, mucous membranes, and tissue of the mucocutaneous zone having an elongated body and a thermoelectric cooling system disposed within the elongated body. The thermoelectric cooling system is configured to physically contact and thermally couple the target area of the cutaneous membranes, mucous membranes, and tissue of the mucocutaneous zone to induce cryoanesthesia or analgesia. The thermoelectric cooling system includes a thermally-conductive cold tip, a thermally-conductive cooling power concentrator thermally coupled to the cold tip, at least one Peltier unit module thermally coupled to the cooling power concentrator, a heatsink thermally coupled to at least one Peltier unit module, a power source, at least one thermal sensor, and a controller operably outputting a control signal to the Peltier unit module to maintain a predetermined temperature.

This invention relates to a method of identifying an accurate dosage of medicine in a dosage chamber of a syringe including the steps of providing an accurate dosage of a detailed single dosage medicine for insertion into a dosage chamber of a syringe; identifying the accurate dosage of medicine in the dosage chamber by retaining a notifier of the accurate dosage; securing the notifier with the syringe wherein the accurate dosage of medicine in a dosage chamber of a syringe is shown by the details on the notifier when secured with the syringe and allowing usage of the syringe to dispense the accurate dosage.

Provided herein is a housing assembly for a drug delivery device, including a first housing part having a first proximal end comprising a first engagement portion and a second engagement portion, a first distal end, and a first sidewall therebetween defining a first longitudinal axis and a first interior, the first sidewall comprising one or more windows therethrough; and a second housing part having a second proximal end, a second distal end comprising a third engagement portion and a fourth engagement portion, and a second sidewall therebetween defining a second longitudinal axis and a second interior.

Drug delivery member insertion depth sensing assemblies, drug delivery devices, and methods for determining an insertion depth of a drug delivery member are disclosed. The sensing assemblies can include electrical sensing assemblies with direct or indirect measurement components or optical sensing assemblies with one or more light sources and one or more photodiodes. A controller of the sensing assemblies can receive data associated with the drug delivery member in an insertion position. The data can then be correlated to an insertion depth of the drug delivery member.