Patent ID: 8617110

Claim:
An infusion pump for infusing fluid from a reservoir into a body of a user, the infusion pump comprising: a housing; a motor contained within the housing; one or more drive train components coupled to the motor within the housing and configured to move in response to the motor to deliver fluid from the reservoir through a fluid path into the body of the user; a sensor that periodically measures the value of a parameter associated with the motor or one of the drive train components during delivery of a current pulse of infusion fluid to obtain a series of measurements; and a processor contained within the housing, wherein the processor determines a peak value of the series of measurements, selects a second value later than the peak value within the series of measurements, calculates a difference between the peak value and the second value, increments a counter when the difference exceeds a threshold value, restarts the counter when the difference is below the threshold value, and declares an occlusion has occurred when the counter exceeds an occlusion-detection count.