Method and apparatus for detecting occlusions in an ambulatory infusion pump
First Claim
1. 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 incrementally infusing fluid from the reservoir into a body of a user, the method comprising:
- taking a series of measurements of a parameter associated with the motor or one of the drive train components;
calculating a weighted average of the series of measurements;
comparing the weighted average to a maximum threshold value; and
determining whether the weighted average is greater than the maximum threshold value.
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Accused Products
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.
252 Citations
36 Claims
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1. 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 incrementally infusing fluid from the reservoir into a body of a user, the method comprising:
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taking a series of measurements of a parameter associated with the motor or one of the drive train components;
calculating a weighted average of the series of measurements;
comparing the weighted average to a maximum threshold value; and
determining whether the weighted average is greater than the maximum threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An infusion pump for infusing fluid from a reservoir into a body of a user, the infusion pump comprising:
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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 adapted 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 and adapted to calculate a weighted average of the series of measurements, compare the weighted average to a maximum threshold value, and to determine 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. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification