A cannula capture mechanism is described herein. The capture mechanism may include an inner housing, outer housing, and a cannula. The outer housing may be configured to move between a compressed and a decompressed state. An outer surface of the inner housing may include one or more interlock components. When the cannula is exposed from a distal end of the inner housing, the one or more interlock components may interact with one or more interlock surfaces formed in another surface of the catheter device. When the cannula is retracted proximally within the inner housing, the inner housing may contract radially inward causing the one or more interlock components to be separated from the one or more interlock surfaces and the outer housing to move to the decompressed state and extend distally over a distal portion of the inner housing.

A needle output mechanism which can be connected to a pharmaceutical agent container and a drive module. The base of the needle output mechanism is equipped with a movable connecting member, a needle set, a needle output operation assembly, and a needle retraction operation member. The connecting member is connected to an adapter mechanism. During injection, the needle set in the connecting member can be driven by the needle output operation assembly, and using a hard needle disposed passing through a soft needle and out from the base, outputs a needle which can directly puncture the human body, successively driving the hard needle (133) to disengage from the soft needle and inject the pharmaceutical agent solution by way of the drive module. After injection, the needle retraction operation member can retract the connecting member and the soft needle thereby facilitating operation.

In some embodiments a system and method are described for safeguarding a hazard. The hazard, for example a needle point, may be moved between a protected retracted position, an active extended position and/or an intermediate position. Optionally in the retracted position, the hazard may be protected inside a housing. Optionally in the extended position, the hazard may be exposed. Optionally, in the intermediate position the hazard may be partially protected and/or concealed, for example by a shield and/or in an indentation. In some embodiments, compromising a shield causes the hazard to be retracted to the retracted position.

The invention relates to an injection device. Exemplary embodiments of the invention comprise an application element, an injection needle, an injection needle housing, a drive system for the injection movement, and a retraction system. In exemplary embodiments, a substance is injected during the retraction movement of the injection needle.

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 syringe is provided with a body, a piston capable of sliding in the body, and an injection device comprising a needle oriented along a longitudinal axis and a casing removably secured to the body and carrying said needle, the casing comprising a plurality of flexible tabs each provided with a stop, the piston comprising a docking system provided with a housing that comprises a flange configured to hold the stops of the flexible tabs in the housing in an insertion position in which the tabs are inserted into the housing, the plurality of tabs comprising a first tab and a second tab situated in opposing areas around the longitudinal axis, the flange comprising a first bearing area and a second bearing area configured to be in contact respectively with the first tab and the second tab in the insertion position.

An autoinjector drug delivery device configured with a stall and endpoint detection algorithm is described that allows for variations in the fill of the drug, barrel, plunger, and other components. The stall or end point detection can cause the autoinjector to stop an extrusion process.

A medical fluid injection device, a medical fluid transfer device and a method of administering and transferring a medical fluid are disclosed. The device and method may include a compressed gas canister in fluid communication with an expandable elastic bladder positioned within a vial of drug to provide a means to deliver drug through an injection cannula that is movable between a plurality of positions or through a transfer conduit.

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.

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.