Dose control system and associated method of use for injectable drug delivery device

摘要

The present invention relates to a dose control system adapted to an injectable drug delivery device comprising a substantially elongated drug delivery body, at least one injectable drug retained by the body, a distal Position and a proximal tip. Here, the dose control system includes three-dimensional magnetic field generating means for generating a magnetic field along three axes (x, y, z); at least a change in the magnetic field generated by the three-dimensional magnetic field generating means A magnetic field detection means configured to measure the relative displacement or relative movement of the drug delivery device; and an integrated control unit, wherein the magnetic field detection means and the displacement detection An integrated control unit is coupled to the magnetic field detection means and to the displacement detection means for processing the information received from both of the means. And wherein the three-dimensional magnetic field generating means is configured to produce a rotational coaxial displacement around and along the longitudinal axis of the drug delivery system; magnetic field detection means is provided along said longitudinal axis; And three-dimensional magnetic field generating means are placed at or near the proximal tip of the body of the drug delivery device.BACKGROUND OF THE INVENTION