Method and apparatus for detecting occlusions in an ambulatory infusion pump
AssigneeMedtronic MiniMed, Inc.
InventorsSheldon B. Moberg, Ian B. Hanson, Cary D. Talbot
Life of this patent
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Abstract
An improved pump, reservoir and reservoir piston are provided for controlled delivery of fluids. A motor is operably coupled to a drive member, such as a drive screw, which is adapted to advance a plunger slide in response to operation of the motor. The plunger slide is removably coupled to the piston. A method, system, and an article of manufacture for automatically detecting an occlusion in a medication infusion pump is provided. The electrical current to an infusion pump is measured. Based on a series of measurements of one or more variables, the infusion pump detects whether there is an occlusion in the system.
Claims19
An infusion pump for infusing fluid from a reservoir into a body of a user, the
- infusion pump comprising:
- a housing;
- a drive mechanism including a motor and one or more drive components contained within the housing and operatively coupled to the reservoir to deliver fluid from the reservoir through a fluid path into the body of the user;
- one or more electronic components to take a series of measurements of a parameter associated with the motor or one of the drive train components;
- and
- a controller contained within the housing, wherein the controller filters the series of measurements to remove the highest measurement and the lowest measurement, calculates a weighted average of the remaining measurements in the series of measurements, compares the weighted average to a maximum threshold value, and determines whether an occlusion has occurred in the fluid path of the infusion pump by determining whether the weighted average is greater than the maximum threshold value.
Dependencies are inferred from the claim text.