Occlusion sensing for an infusion pump
First Claim
1. An occlusion sensor system for an infusion pump system including a reusable controller device removably attachable to a disposable pump device, the occlusion sensor system comprising:
- a light emitter and a light sensor in electrical communication with control circuitry of a reusable controller device; and
a light transmissive member aligned with the light emitter and the light sensor when the reusable controller device is removably attached to a disposable single-use pump device;
wherein the light sensor receives light from the light emitter that undergoes total internal reflection within the light transmissive member; and
comprising a flexible membrane arranged in the disposable single-use pump device, the flexible membrane spaced apart from the light transmissive member by a cavity when in a first operative position.
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Accused Products
Abstract
Some embodiments of an infusion pump system may include an occlusion sensor that can be used to detect when an occlusion exists in the fluid path between the medicine reservoir and the infusion site on the user'"'"'s skin. Such an occlusion may occur, for example, when the fluid flow line (e.g., a cannula, infusion set tubing, or the like) is kinked. If the medicine dispensation path to the user is occluded, the user may receive no dosage or a lower dosage of the medicine. As such, the occlusion sensor can be used to indicate when the fluid is flowing or not flowing, thereby permitting the infusion pump system to communicate an alarm to the user if an occlusion exists.
271 Citations
24 Claims
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1. An occlusion sensor system for an infusion pump system including a reusable controller device removably attachable to a disposable pump device, the occlusion sensor system comprising:
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a light emitter and a light sensor in electrical communication with control circuitry of a reusable controller device; and a light transmissive member aligned with the light emitter and the light sensor when the reusable controller device is removably attached to a disposable single-use pump device; wherein the light sensor receives light from the light emitter that undergoes total internal reflection within the light transmissive member; and comprising a flexible membrane arranged in the disposable single-use pump device, the flexible membrane spaced apart from the light transmissive member by a cavity when in a first operative position. - View Dependent Claims (2, 3, 4)
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5. A method for detecting an occlusion in a flow path from an infusion pump system, comprising:
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activating a light emitter to direct light into a light transmissive member; receiving signals from a light sensor by control circuitry arranged in a controller device housing, the signals from the light sensor being generated in response to the light sensor receiving light from the light emitter that undergoes total internal reflection within the light transmissive member in a region proximate to a flexible membrane, the light transmissive member aligned with the light emitter and a light sensor when the controller device housing is removably attached to a disposable single-use pump device; and determining if an occlusion exists in a flow path based at least in part on the signals received from the light sensor. - View Dependent Claims (6, 7, 8)
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9. An occlusion sensor system for an infusion pump system, the occlusion sensor system comprising:
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a light emitter and a light sensor in electrical communication with control circuitry of the infusion pump system; a light transmissive member aligned with the light emitter and the light sensor; and a flexible membrane spaced apart from the light transmissive member by a cavity, wherein the light sensor receives light from the light emitter that undergoes total internal reflection within the light transmissive member. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification