Patent ID: 7998111

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 configured to measure the value of a parameter associated with the motor or one of the drive train components before delivery of a current pulse of infusion fluid to obtain a first value and to periodically measure the value of said parameter during delivery of the current pulse of infusion fluid to obtain a series of measurements; and a processor contained within the housing and configured to determine a peak value of the series of measurements, select a second value later than the peak value within the series of measurements, calculate a first difference between the peak value and the second value, calculate a second difference between the peak value and the first value, and compare the second difference between the peak value and the first value to the first difference between the peak value and the second value to determine whether an occlusion has occurred in the fluid path of the infusion pump.