Occlusion Sensing for an Infusion Pump
First Claim
1. An occlusion sensor system for an infusion pump system including a reusable controller device that is removably attachable to a disposable single-use pump device, the occlusion sensor system comprising:
- a light emitter and a light sensor arranged in the reusable controller device, the light emitter and the light sensor being in electrical communication with control circuitry of the reusable controller device; and
a light transmissive member arranged in the disposable single-use pump device, the light transmissive member being 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 is internally reflected by the light transmissive member.
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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.
263 Citations
31 Claims
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1. An occlusion sensor system for an infusion pump system including a reusable controller device that is removably attachable to a disposable single-use pump device, the occlusion sensor system comprising:
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a light emitter and a light sensor arranged in the reusable controller device, the light emitter and the light sensor being in electrical communication with control circuitry of the reusable controller device; and a light transmissive member arranged in the disposable single-use pump device, the light transmissive member being 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 is internally reflected by the light transmissive member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for detecting an occlusion in a flow path from an infusion pump system, comprising:
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activating a light emitter arranged in a controller device housing to direct light outside of the controller device housing and into a light transmissive member arranged in a pump device that is removably attached to the controller device housing; receiving signals from a light sensor arranged in the controller device housing, the signals from the light sensor being generated in response to the light sensor receiving light from the light emitter that is internally reflected by the light transmissive member; 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 (16, 17, 18, 19, 20)
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21. An infusion pump system for dispensing medicine, comprising:
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a pump device including a drive system to dispense a medicine from the pump device and a cap having a fluid channel through which the medicine is dispensed, the cap having a light transmissive member arranged proximate to the fluid channel; and a removable controller device including control circuitry to communicate with the drive system of the pump device when the pump device is removably attached to the controller device, the removable controller device including a light emitter and a light sensor that are in electrical communication with control circuitry, wherein the light sensor receives light from the light emitter that is internally reflected by the light transmissive member in the cap. - View Dependent Claims (22, 23, 24, 25)
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26. An occlusion sensor system for detecting an occlusion in a flow path from an insulin infusion pump system, the occlusion sensor system comprising:
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a fluid channel defined in a cap of a pump device, the fluid channel being at least a portion of an insulin flow path; a flexible membrane in the cap adjacent to the fluid channel so as to define at least a portion of a wall of the fluid channel; an air cavity in the cap adjacent to the flexible membrane and opposite the fluid channel; a light transmissive member in the cap adjacent to the air cavity, the light transmissive member being arranged opposite the flexible membrane such that fluid pressure in the fluid channel above a threshold value causes the flexible membrane to deform into the air cavity and toward the light transmissive member. a light emitter and a light sensor arranged in a controller device and outside of the pump device, the light emitter and the light sensor being aligned with the cap of the pump device when the controller device is removably attached to the pump device. - View Dependent Claims (27, 28, 29, 30, 31)
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Specification