Methods and apparatuses for detecting occlusions in an ambulatory infusion pump

A method of detecting an occlusion in an infusion pump having a drive mechanism that includes a motor and one or more drive train components coupled to a reservoir for infusing fluid from the reservoir into a body of a user, the method comprising:

• (a) measuring a plurality of respective values for each of a first value and a second value, said first value being equal to the magnitude of force applied to a drive train component and said second value being equal to the magnitude of the motor's drive current;
• (b) calculating a respective average value based on said plurality of measured values for each of said first and second values;
• (c) combining said respective average values to obtain a combined value;
• and
• (d) determining whether an occlusion has occurred in the fluid path of the infusion pump by using the combined value.