Dose detection and drug identification for a medication delivery device

A medication delivery method comprising:

• providing a medication delivery device including a device body having a first key feature configured to receive a complementary key feature of a detection module, the medication delivery device having a sensed element oriented in a predetermined angular position relative to the medication delivery device correlated to the type of medication contained by the medication delivery device;
• removably attaching to the medication delivery device a detection module having a second key feature cooperating with the first key feature to orient the detection module in a predetermined angular position relative to the medication delivery device, the medication delivery device including a sensor operable to detect the angular position of the sensed element relative to the detection module;
• detecting the angular position of the sensed element relative to the detection module with the detection module attached to the medication delivery device;
• and
• determining the type of medication contained by the medication delivery device based on the detected relative angular position of said sensed element.

A medication delivery system comprising:

• a medication delivery device comprising a device body having a first key feature configured to receive a complementary key feature of a detection module, said medication delivery device including a dose setting member attached to the device body and rotatable relative to the device body about an axis of rotation during dose delivery;
• a detection module removably attached to said medication delivery device, said detection module comprising a second key feature cooperating with the first key feature to orient said detection module in a predetermined angular position relative to said medication delivery device;
• a sensed component attached to the dose setting member, said sensed component including a unique angular profile about the axis of rotation of the dose setting member;
• a sensor attached to said detection module, said sensor being operable to detect one or more angular positions of said sensed element relative to said sensor;
• and
• a controller responsive to the one or more detected angular positions of said sensed element relative to said sensor to determine information regarding said medication delivery device.

A medication delivery device comprising:

• a device body;
• a dose setting member attached to said device body and rotatable relative to said device body about an axis of rotation during dose delivery;
• a sensed component attached to and rotationally fixed with said dose setting member, said sensed component including a unique angular profile about the axis of rotation of said dose setting member;
• an actuator attached to said device body, said actuator being axially and rotationally fixed with said dose setting member in a first operating mode during dose setting, said actuator being non-rotatable relative to said device body in a second operating mode during dose delivery, said sensed element and said dose setting member rotating relative to said actuator during dose delivery in relation to the amount of dose delivered;
• a sensor attached to said actuator, said sensor being configured to detect one or more angular positions of said sensed element relative to said sensor;
• and
• a controller responsive to the one or more detected angular positions of said sensed element relative to said sensor to determine information regarding said medication delivery device.