Patent ID: 8808269
Filing Date: 2014-08-19
Classification: A61M

Abstract:
1. An infusion device, comprising: a housing including a voided region to receive a reservoir, the voided region including a voided portion to receive a shaft portion including a shaft coupled to a plunger of the reservoir, the shaft portion comprising a detectable feature; a sensing arrangement proximate the voided portion to sense the detectable feature when the reservoir is inserted in the voided region; a motor having a rotor coupled to the shaft, the shaft being displaced to deliver fluid from the reservoir in response to rotation of the rotor; a motor position sensor to measure an amount of rotation of the rotor; and a control module coupled to the sensing arrangement and the motor position sensor to obtain a measured position of the shaft using the sensing arrangement, determine an expected position of the shaft based on the amount of rotation, and identify an anomalous condition based on a difference between the expected position and the measured position.