Method and Apparatus for Detecting Errors, Fluid Pressure, and Occlusions in an Ambulatory Infusion Pump
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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 a force sensor failure in a medication infusion pump is provided. The electrical current to an infusion pump is measured. Based on the current measurements, the infusion pump detects when the plunger slide is seated in the reservoir, and detects a problem with the force sensor when the force sensor independently fails to register a value indicating that the plunger slide is seated in the reservoir.
178 Citations
41 Claims
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1-10. -10. (canceled)
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11. A system of detecting a malfunction with a force sensor in an infusion pump having a motor to drive a plunger slide into a reservoir, the system comprising:
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means for taking current measurements to the motor;
means for detecting when the plunger slide is seated in the reservoir based on the current measurements; and
means for detecting a problem with the force sensor when the force sensor independently fails to register a value indicating that the plunger slide is seated in the reservoir. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21-31. -31. (canceled)
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32. An infusion pump having a motor to drive a plunger slide into a reservoir, wherein the infusion pump is controlled by a processor, the processor performing the steps of:
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receiving current measurements from the motor;
detecting when the plunger slide is seated in the reservoir based on the current measurements; and
detecting a problem with the force sensor when the force sensor independently fails to register a value indicating that the plunger slide is seated in the reservoir. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification