Methods, apparatuses, and uses for infusion pump fluid pressure and force detection
First Claim
1. An occlusion detection system for detecting an occlusion in a fluid path of an infusion pump with a reservoir containing fluid for delivering fluid to a user, the occlusion detection system comprising:
- a housing;
a motor contained within the housing;
one or more drive train components that react to stimulus from the motor to force a fluid from a reservoir into the user;
a sensor positioned to measure a parameter associated with the motor or a drive train component, wherein the sensor produces three or more output levels across a range of measurements; and
an electronics system that processes the three or more output levels to declare when an occlusion exists.
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Abstract
An occlusion detection system detects an occlusion in a fluid path of an infusion pump. The infusion pump is for delivering fluid to a user. The infusion pump includes a housing, a motor, a reservoir, one or more drive train components, a sensor, and an electronics system. The motor is contained within the housing. The reservoir contains the fluid to be delivered. The one or more drive train components react to stimulus from the motor to force the fluid from the reservoir into the user. The sensor is positioned to measure a parameter associated with the motor or a drive train component, and the sensor produces three or more output levels across a range of measurements. The electronics system processes the sensor output levels to declare when an occlusion exists.
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Citations
33 Claims
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1. An occlusion detection system for detecting an occlusion in a fluid path of an infusion pump with a reservoir containing fluid for delivering fluid to a user, the occlusion detection system comprising:
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a housing;
a motor contained within the housing;
one or more drive train components that react to stimulus from the motor to force a fluid from a reservoir into the user;
a sensor positioned to measure a parameter associated with the motor or a drive train component, wherein the sensor produces three or more output levels across a range of measurements; and
an electronics system that processes the three or more output levels to declare when an occlusion exists. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 33)
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29. A method of detecting an occlusion in an infusion pump for infusing fluid into the body of a user, the method comprising the steps of:
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obtaining a measurement from a sensor before each fluid delivery;
calculating a slope of a line generated using two or more measurements;
comparing the slope to a slope threshold;
incrementing a counter when the slope exceeds the slope threshold;
declaring an occlusion when the counter exceeds a detection count.
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30. A method of detecting an occlusion in an infusion pump for infusing fluid into the body of a user, the method comprising the steps of:
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obtaining a measurement from a sensor before each fluid delivery;
calculating a current slope of a line using two or more measurements;
calculating an average slope using a previous average slope and the current slope;
comparing the average slope to a slope threshold;
incrementing a counter when the average slope exceeds the slope threshold;
declaring an occlusion when the counter exceeds a detection count. - View Dependent Claims (31)
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32. An occlusion detection system for detecting an occlusion in a fluid path of an infusion pump with a reservoir for containing fluid for delivering fluid to a user, the occlusion detection system comprising:
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a housing;
forcing means for forcing fluid from a reservoir containing a fluid;
sensing means for sensing a parameter associated with the forcing means for forcing fluid from the reservoir to obtain one or more measurements;
wherein the sensing means produces one of three or more output levels for each of the one or more the measurements; and
evaluation means for evaluating the one of three or more output levels associated with each of the one or more measurements to declare when an occlusion exists.
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Specification