Methods and apparatuses 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 infusing fluid from the reservoir into a body of a user, the method comprising:
- (a) measuring respective values of at least two different parameters associated with the motor or one of the drive train components;
(b) multiplying at least one of said respective values by a weighting coefficient;
(c) adding said respective values, as weighted, to one another 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.
1 Assignment
0 Petitions
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 measurements of one or more variables, the infusion pump detects whether there is an occlusion in the system. The methods of detecting occlusions may be dynamic.
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Citations
18 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 infusing fluid from the reservoir into a body of a user, the method comprising:
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(a) measuring respective values of at least two different parameters associated with the motor or one of the drive train components; (b) multiplying at least one of said respective values by a weighting coefficient; (c) adding said respective values, as weighted, to one another 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. - View Dependent Claims (2, 3, 4, 5)
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6. 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:
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(a) measuring a plurality of respective values for each of at least two different parameters associated with the motor or one of the drive train components; (b) calculating a respective average value based on said plurality of measured values for each of the at least two different parameters; (c) multiplying said respective average values together 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. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. 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:
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(a) measuring 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) multiplying at least one of said first and second values by a weighting coefficient; (c) combining said first and second values, as weighted, 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. - View Dependent Claims (15, 16, 17, 18)
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Specification