초록 ▼

An injection pen that is suitable for being carried in the clothes of a user-patient for the selective use thereof. The pen includes a housing having a cartridge having a variable content disposed therein. The cartridge has an outlet formed therein. A piston is disposed therein for altering the flui

An injection pen that is suitable for being carried in the clothes of a user-patient for the selective use thereof. The pen includes a housing having a cartridge having a variable content disposed therein. The cartridge has an outlet formed therein. A piston is disposed therein for altering the fluid content of the cartridge. A pump rod is biased against the piston for altering the fluid content of the cartridge. A drive mechanism is provided for moving the pump rod at a continuous rate. The electromotor is controlled by an electronic control unit including a memory means for storing data, such as that corresponding to the reservoir stock status and that corresponding to the number of units of injection fluid to be delivered to the user-patient. A comparator means is provided for comparing the number of units of fluid with the reservoir stock status for controlling the electromotor. Preferably, the control unit is an integrated circuit including a processor.

대표청구항 ▼

In an injection pen suitable for being carried in the clothes of a user-patient and for being connected to the patient only during distinct one at a time injections, the injection pen being of the type including an elongated housing having a handle means around the outside adapted to be gripped with

In an injection pen suitable for being carried in the clothes of a user-patient and for being connected to the patient only during distinct one at a time injections, the injection pen being of the type including an elongated housing having a handle means around the outside adapted to be gripped within the fingers of the user-patient, the housing incorporating a magazine for an injection fluid cartridge having a variable fluid volume, the cartridge further having an outlet formed therein and a piston disposed therein, the pen having a pump rod that can be biased against the piston disposed in said cartridge for altering the fluid volume thereof, a head portion at one end of the elongated housing adapted to receive a needle unit for transferring fluid expelled from the cartridge through the outlet thereof to the body of the user-patient, and a drive mechanism for moving said pump rod and the piston, wherein the improvement thereupon comprising, in combination, the drive mechanism including an electromotor which is controlled by an electronic control unit comprising memory means, said memory means having areas assigned as first dose memory means, for storing a data corresponding to a certain number of dose units of injection fluid, the pen further incorporating an externally operable dose set unit for setting said data, an indicator means controlled by said first dose memory means for representation of said certain number to the user-patient and a power source connected to the drive mechanism, the electronic control unit, the dose set unit and the indicator means for providing power thereto.