Dose capture add-on device for handheld injection syringe

Handheld dose capture device, configured and adapted to be releasably attachable to a handheld injection syringe comprising an elongated body having a longitudinal bore defining a central longitudinal axis, the elongated body having a proximal extremity and a distal extremity, and a syringe plunger located within, and movable along said central longitudinal axis of said bore, the syringe plunger extending beyond said proximal extremity;

• wherein the releasably attachable dose capture device comprises:
• a support body, adapted and configured to be releasably attachable at least one or more locations along a length of the elongated body of the handheld injection syringe, in parallel alignment to the central longitudinal axis of said elongated body;
• wherein the support body comprises a tubular body having a longitudinal central bore defining a longitudinal axis that is located parallel to the longitudinal axis of the elongated body of the injection syringe when the dose capture device is mounted on the handheld injection syringe, wherein said support body further includes a mount defining a bore having an internal threaded surface;
• a displacement replicator system, adapted and configured to replicate a translational movement of the plunger, in parallel to the longitudinal axis, wherein said displacement replicator system includes a shaft at least partially housed within the central bore of the tubular body and within said bore, said shaft includes an external threading configured to engage, and cooperate with said internal threaded surface of said bore, such that when the shaft is moved in and out of the central bore of the tubular body, engagement between the external threading of the shaft and the internal threaded surface of the bore causes rotational movement of the shaft about the longitudinal axis of the tubular body;
• a coupling means, adapted and configured to couple a proximal extremity of the plunger with a proximal extremity of the shaft;
• and
• wherein the handheld dose capture device comprises at least one sensor and a processing system, and the at least one sensor and processing system are adapted and configured, when the handheld dose capture device is mounted to the handheld injection syringe, to correlate the rotational movement of the shaft with a selection and/or ejection of a dose of injectable substance operated by a user through the translational movement of the plunger along the longitudinal axis.