Disclosed herein are transdermal microneedling devices that generate and emit low RF energy. Such a microneedling device may comprise a drive motor, drive circuitry for controlling the drive motor, and a drive linkage located on the drive motor rotor. The microneedling device may also comprise a power source capsule comprising a battery and associated power management circuitry. Also included may be a needle cartridge coupled to the main body, and comprising a drive shaft and a needle unit coupled to a distal end of the drive shaft to move therewith, where the needle unit has at least one needle extending therefrom. The drive shaft may comprise a linkage member configured to engage the drive linkage of the drive motor, and be configured to be driven by the drive motor and thereby drive movement of the needle unit such that the at least one needle extends beyond and retracts within the distal end of the needle cartridge. The microneedling device may also include RF energy circuitry powered by the power source and configured to generate RF energy, as well as transfer circuitry configured to transfer the generated RF energy from the RF energy circuitry to the at least one needle.

A digital syringe is used with conventional polymer disposable syringe construction to be practical in the medical environment. Errors associated with the larger volumes of the syringes (which exacerbate minor errors in plunger position) and the flexibility and dimensional variations of the polymer plungers are accommodated by direct measurement of the syringe plunger position rather than indirect measurement of motor position and inference of syringe plunger position. This direct measurement eliminates mechanical tolerances (“stack up”) in the motor, gear train, and lead screw on plunger movement, an effect exacerbated by flexibility of the plunger and changes in syringe resistance and medicament viscosity, for example, with different medicaments or when the syringe is refrigerated. The digital syringe may be combined with the motor unit to provide additional versatility.

Methods of actuating a needle array device can include causing fluid to move through flow channels to needle apertures that are spaced apart from an inflow aperture at different distances where flow channels that have approximately equal pathway lengths and where the fluid can reach tips of the needle apertures approximately simultaneously, which can provide an approximately equal dosage or fluid volume through the tips of the needle apertures.

A drug delivery device (100) for estimating the amount of free air in a cartridge (1) comprising a cartridge receiving portion (not shown) adapted to receive a cartridge (1), the cartridge (1) comprising a body portion (6), an axially displaceable piston (5), and a distal outlet portion (4), an expelling assembly comprising an axially displaceable piston drive member (10) adapted to interface with the proximal piston (5) portion of a received cartridge (1), the piston drive member (10) is adapted to be moveable in a distal direction, and to thereby pressurize the drug in a received cartridge. The drug delivery device further comprises means for measuring and acquiring a property relating to a fluid pres-sure of the drug in a received cartridge (1), and where the property depends on the amount of free air (7) contained in the cartridge (1). The drug delivery device further comprises means (20) for measuring and acquiring the position of the piston rod drive member (10), and means (40) for measuring and acquiring the time. The drug delivery device further comprises means (30) for storing, and means (31) for processing the acquired measurements. The processing means are configured for estimating the amount of air (7) in the cartridge (1).

A skin-patch type medicament delivery device (10, 30, 50) comprises a housing (11) containing a medicament delivery mechanism (12) including an injection needle (13). An adhesive surface (19) is provided for securing the housing (11) to a patient's skin during a medicament delivery process. A sterilizing mechanism is connected to the housing (11) and thus integrated into the device, and comprises a pad (18) impregnated with sterilizing agent which contacts the skin once the housing (11) is secured to a patient, and which can, respectively has to be moved in a swiping action across the injection site to sterilize the latter before the needle insertion and drug administration can be performed.

A skin sensing system for a drug delivery device includes a control unit and a skin sensor comprising one or more electrodes. The skin sensor may be configured to store a threshold value associated with skin sensing, receive one or more sensed signal values .sup..from the one or more electrodes, compare the one or more sensed signal values with the threshold value, and based on the comparison, transmit a resultant signal to the control unit, The resultant signal is used by the control unit to determine whether a skin surface of a user is substantially proximate to the skin sensor upon receiving the resultant signal. A drug delivery device for sensing contact with the skin includes the skin sensing system. When the skin sensor senses that the drug delivery device is in contact with a patient's skin surface, drug delivery from the device may he permitted.

An infusion device includes a housing with an interior chamber sized and configured to hold at least a flange and plunger of a syringe, a trigger held by the housing, and a lever in communication with the trigger and including an upwardly extending cam with a cam path having an upper end. The cam is in communication with the flange of the syringe. In response to actuation of the trigger to dispense fluid from the syringe, the upper end of the cam travels upward above the syringe and longitudinally toward a dispensing end of the syringe to linearly translate the plunger of the syringe in a first direction to dispense fluid from the syringe. To refill fluid into the syringe, the upper end of the cam travels downward and longitudinally away from the dispensing end of the syringe to linearly translate the plunger in a second direction to intake fluid.

Described herein is a dispenser for dispensing fluid that, integrated into one hand piece, comprises a variable volume chamber with a plunger disposed within the chamber and a chamber inlet and outlet. The inlet and outlet communicate directly with a common chamber volume and the plunger translates in a linear direction relative to the chamber along a common longitudinal axis to expel fluid from the chamber (expel stroke) and/or draw fluid into the chamber (drawing stroke). The plunger is linked to a controller, a power source and a motor that drives translation movement of the plunger. The dispenser described herein offers a variety of advantages over the art including accurate dosing without the user having to manually regulate the dose amount—the amount to be dosed is related to the volume of fluid in the chamber which can be pre-set or varied automatically using sensors and controllers.

There is provided a pharmaceutical syringe unit that is mounted to a pharmaceutical injection device main body and holds a pharmaceutical syringe, in order to mount the pharmaceutical-filled pharmaceutical syringe to a pharmaceutical injection device, wherein a syringe cover is slid in the forward and backward direction with respect to a distal end cap by the operation of the pharmaceutical injection device main body, allowing movement between a needle insertion position at which the insertion of an injection needle into a target is completed, and a needle withdrawal position at which the withdrawal of the injection needle from the target is completed, and the range over which the syringe cover can be slid by a guide component is greater than the distance between the needle insertion position and the needle withdrawal position.

The pharmaceutical injection device includes a pharmaceutical syringe mounting portion (3) provided within a main body case (2) and to which a pharmaceutical syringe (4) is removably mounted, a piston (5) provided movably with respect to the pharmaceutical syringe (4) mounted to the pharmaceutical syringe mounting portion (3), a drive mechanism (6) for driving the piston (5), a controller (7) that is electrically connected to the drive mechanism (6), a display section (35) that is connected to the controller (7), and an encoder (26) that is connected to the controller (7) and detects the amount of the pharmaceutical remaining inside the pharmaceutical syringe (4). The controller (7) displays a warning on the display section (35) recommending removal of the pharmaceutical syringe (4) from the pharmaceutical syringe mounting portion (3) when the presence of a pharmaceutical is detected by the encoder (26).