Patent ID: 11918792
Assignee: nan
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 18:
19. A method of dose sensing with a medication delivery device, comprising:
providing a medication delivery device with 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 at least one of dose setting and dose delivery, an actuator attached to said device body, said actuator being rotationally fixed with said dose setting member in a first operating mode during dose setting, a dose detection module including a module body attachable to the actuator, a sensed element attached to and rotationally fixed with said dose setting member, said sensed element including alternating surface features radially-spaced about the axis of rotation of said dose setting member, a rotation sensor including a following member, the following member extending axially and including a contact portion resting radially against said sensed element, the contact portion being positioned to move over the surface features during rotation of said sensed element relative to the following member, and a controller responsive to said rotation sensor;
detecting relative movement between the contact portion and the surface features; and
determining data, with the controller, based on the detected relative movement.