Occlusion Detection for an Infusion Pump System
First Claim
1. An occlusion sensor system for detecting an occlusion in a flow path from an insulin infusion pump system, the occlusion sensor system comprising:
- a fluid channel that at least partially defines an insulin flow path between an insulin reservoir and an output port;
a flexible membrane in fluid communication with the fluid channel so that fluid pressure in the fluid channel acts upon the flexible membrane;
an air cavity positioned adjacent to the flexible membrane and generally opposite the fluid channel;
a light transmissive member 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 primary light emitter configured to align with the light transmissive member and emit light into the light transmissive member;
a light sensor configured to align with the light transmissive member and receive light from the primary light emitter that passes through the light transmissive member; and
a reference light emitter configured to emit light that is received by the light sensor, wherein the reference light emitter is spaced apart from the primary light emitter.
9 Assignments
0 Petitions
Accused Products
Abstract
Some embodiments of an infusion pump system include an occlusion detection system to detect when an occlusion exists in the fluid path between the medicine reservoir and the infusion site located, for example, on the user'"'"'s skin. The occlusion detection system can be configured to self-calibrate in a manner that accounts for changes in environmental conditions, such as ambient temperature, pressure, or the like, so that the occlusion detection system provides reliable feedback to a user as to the occluded or non-occluded state of the medicine flow path.
-
Citations
20 Claims
-
1. An occlusion sensor system for detecting an occlusion in a flow path from an insulin infusion pump system, the occlusion sensor system comprising:
-
a fluid channel that at least partially defines an insulin flow path between an insulin reservoir and an output port; a flexible membrane in fluid communication with the fluid channel so that fluid pressure in the fluid channel acts upon the flexible membrane; an air cavity positioned adjacent to the flexible membrane and generally opposite the fluid channel; a light transmissive member 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 primary light emitter configured to align with the light transmissive member and emit light into the light transmissive member; a light sensor configured to align with the light transmissive member and receive light from the primary light emitter that passes through the light transmissive member; and a reference light emitter configured to emit light that is received by the light sensor, wherein the reference light emitter is spaced apart from the primary light emitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. 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 that defines a space to receive medicine therein, the occlusion sensor system comprising:
-
a primary light emitter, a reference light emitter, and a light sensor arranged in the reusable controller device, wherein the primary light emitter, the reference light emitter, and the light sensor are in electrical communication with control circuitry housed inside 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 primary light emitter and the light sensor when the reusable controller device is removably attached to a disposable single-use pump device; wherein in response to activation of the primary light emitter, the light sensor receives at least a portion of the light from the primary light emitter that passes through the light transmissive member, and wherein in response to activation of the reference light emitter, the light sensor receives a least a portion of the light that is emitted from the reference light emitter without passing through the light transmissive member. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
-
18. An occlusion sensor system for detecting an occlusion in a flow path from an insulin infusion pump system, the occlusion sensor system comprising:
-
a primary light emitter configured to emit light toward an insulin flow path; a light sensor configured to receive at least a portion of the light from the primary light emitter after the light is emitted toward the insulin flow path, wherein the light sensor outputs an electrical signal in response to receiving light; a reference light emitter configured to emit light that is received by the light sensor, wherein the reference light emitter is separate from the primary light emitter; and control circuitry electrically connected to the primary light emitter, the reference light emitter, and the light sensor, wherein the control circuitry compares a first value indicative of light detected at the light sensor from the primary light emitter to a second value indicative of light detected at the light sensor from the reference light emitter, and in response to the comparison of the first value to the second value being outside of a threshold range, the control circuitry generates an occlusion alarm for output via a user interface. - View Dependent Claims (19)
-
-
20. A method for detecting an occlusion in a flow path from an infusion pump system, comprising:
-
activating a reference light emitter to direct light toward a light sensor housed in an infusion pump system, wherein the light sensor generates an electrical signal in response to receiving light from the reference light emitter; determining a first value indicative of light detected at the light sensor from the reference light emitter; activating a primary light emitter to direct toward a medicine flow path for the infusion pump system, wherein the light sensor receives a least a portion of the light emitted from the primary light emitter; determining a second value indicative of light detected at the light sensor from the primary light emitter; and determining if an occlusion exists in the medicine flow path based at least in part on a comparison of the second value to the first value.
-
Specification