| abstract |
A dose monitoring system for mounting on an injection pen having a body and a dose setting wheel defined at the end of the body. The dose monitoring system includes a magnet configured to be attached to an outer surface of the dose setting wheel, a housing configured to be attached to an outer surface of the body of the injection pen, the housing includes an integrated control unit and at least one magnetometer in electrical connection with the integrated control unit, the integrated control unit, when the housing is mounted on the injection pen, being configured to register at least one magnetic field sensed by the at least one magnetometer when the magnet co-rotates with the dose setting wheel during setting of a dose by a user on the injection pen, the integrated control unit being further configured, when the housing is mounted on the injection pen, to calculate a dose set by the user of the injection pen from the at least one magnetic field registered with the integrated control unit. |