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.
90 Citations
50 Claims
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1-41. -41. (canceled)
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42. A system to detect if a force sensor fails to indicate that a plunger is seated in a reservoir, comprising:
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an infusion pump case to contain the reservoir, the plunger, a motor to drive the plunger into the reservoir, and the force sensor to register when the plunger is seated in the reservoir; and a processor within the infusion pump case, the processor coupled to a memory and configured to execute program instructions to control the motor, wherein the program instructions to control the motor include instructions to record current draw to the motor to determine when the plunger is seated in the reservoir, and a problem with the force sensor is detected when the force sensor independently fails to register that the plunger is seated in the reservoir. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50)
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Specification