Sanofi
RFID DOSE TRACKING MECHANISM FOR INJECTION DEVICES

Abstract:

Described is a dose tracking mechanism for a drug delivery device, including an RFID device with an electric circuit and a switch operable to open and close the electric circuit to transmit a wireless signal to a receiving device when the electric circuit is closed by the switch. The switch is configured to open and close in response to operation of a dose setting and/or a dose dispensing mechanism of the drug delivery device, and the closing and opening of the electric circuit generates a pulse of the wireless RFID signal. In one embodiment, each pulse corresponds to a unit of a dose of medicament set by the dose setting mechanism or dispensed by the dose dispensing mechanism from a drug container of the drug delivery device, depending on if the dose setting or dose dispensing mechanism is arranged to toggle the switch.