Eli Lilly and Company
Reusable medication delivery device with remaining medication determination capability

Abstract:

A reusable medication delivery device that can determine medication remaining in a simple fashion. The device includes a first sensor (200) for sensing when a cartridge is mounted in the device, and at least one second sensor for sensing a retraction of a drive member (160) that engages a cartridge plunger (132). The device includes a controller that determines, based on inputs from the first sensor and the at least one second sensor, that a newly installed cartridge is to be considered full or not full of medication. The controller calculates, after a medication delivery and based on an input from a means for determining an amount of medication delivered by operation of a dose delivery mechanism, and if the cartridge was considered full when newly installed, a quantity of medication remaining in the installed cartridge after the medication delivery.