Pattern recognition system and method for the detection of stuck fluid droplets in a fluid delivery line of an infusion system
First Claim
Patent Images
1. An infusion system comprising:
- a pump;
a fluid delivery line connected to the pump for delivering fluid;
at least one sensor connected to the fluid delivery line for emitting and receiving signals to detect whether there is air in the fluid delivery line;
a processor in electronic communication with the pump and the at least one sensor; and
a memory in electronic communication with the processor, wherein the memory comprises programming code for execution by the processor, and the programming code is configured to analyze the signals to determine if a stuck fluid droplet is stuck within the fluid delivery line at a location of the at least one sensor;
wherein the programming code is configured to determine if the stuck fluid droplet is stuck within the fluid delivery line at the location of the at least one sensor by determining a pattern relationship over time between a plurality of digital measurements of the signals;
wherein the programming code is configured to determine that the stuck fluid droplet is present if the determined pattern relationship starts at or below a known liquid signal ADC value at a first period in time, increases from at or below the known liquid signal ADC value to over a primary threshold ADC value at a second period in time, decreases from over the primary threshold ADC value to between the primary threshold ADC value and a secondary threshold ADC value at a third period in time, and passes a stability test while being disposed at a fourth period in time between the primary threshold ADC value and the secondary threshold ADC value.
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Abstract
An infusion system includes a pump, a fluid delivery line, a sensor, a processor, and a memory. The fluid delivery line is connected to the pump for delivering fluid. The sensor is connected to the fluid delivery line for emitting and receiving signals to detect whether there is air in the fluid delivery line. The processor is in electronic communication with the pump and the sensor. The memory is in electronic communication with the processor. The memory includes programming code for execution by the processor. The programming code is configured to analyze the signals to determine if a stuck fluid droplet is stuck within the fluid delivery line at a location of the sensor.
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Citations
42 Claims
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1. An infusion system comprising:
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a pump; a fluid delivery line connected to the pump for delivering fluid; at least one sensor connected to the fluid delivery line for emitting and receiving signals to detect whether there is air in the fluid delivery line; a processor in electronic communication with the pump and the at least one sensor; and a memory in electronic communication with the processor, wherein the memory comprises programming code for execution by the processor, and the programming code is configured to analyze the signals to determine if a stuck fluid droplet is stuck within the fluid delivery line at a location of the at least one sensor; wherein the programming code is configured to determine if the stuck fluid droplet is stuck within the fluid delivery line at the location of the at least one sensor by determining a pattern relationship over time between a plurality of digital measurements of the signals; wherein the programming code is configured to determine that the stuck fluid droplet is present if the determined pattern relationship starts at or below a known liquid signal ADC value at a first period in time, increases from at or below the known liquid signal ADC value to over a primary threshold ADC value at a second period in time, decreases from over the primary threshold ADC value to between the primary threshold ADC value and a secondary threshold ADC value at a third period in time, and passes a stability test while being disposed at a fourth period in time between the primary threshold ADC value and the secondary threshold ADC value. - 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 a stuck fluid droplet in a fluid delivery line of an infusion system comprising the steps of:
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pumping fluid through the fluid delivery line over at least one sensor; emitting and receiving signals from the at least one sensor into and from the fluid delivery line; and processing measurements of the signals, using a processor, to determine whether a stuck fluid droplet is stuck within the fluid delivery line at a location of the at least one sensor; wherein the step of processing measurements of the signals with the processor further comprises determining whether the stuck fluid droplet is stuck within the fluid delivery line at the location of the at least one sensor by determining a pattern relationship over time between a plurality of digital measurements of the signals; wherein the step of processing measurements of the signals with the processor further comprises determining that the stuck fluid droplet is present if the determined pattern relationship starts at or below a known liquid signal ADC value at a first period in time, increases from at or below the known liquid signal ADC value to over a primary threshold ADC value at a second period in time, decreases from over the primary threshold ADC value to between the primary threshold ADC value and a secondary threshold ADC value at a third period in time, and passes a stability test while being disposed at a fourth period in time between the primary threshold ADC value and the secondary threshold ADC value. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method for detecting air in a fluid delivery line of an infusion system comprising the steps of:
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pumping fluid through the fluid delivery line over at least one sensor; emitting and receiving signals from the at least one sensor into and from the fluid delivery line; and processing measurements of the signals, using a processor, to determine whether the air is in the fluid delivery line by determining a pattern relationship over time of the signals while the signals are below an air/liquid threshold ADC value boundary; wherein the step of processing measurements of the signals with the processor further comprises determining that the air is present if the determined pattern relationship starts at or below a known liquid signal ADC value at a first period in time, increases from at or below the known liquid signal ADC value to over the air/liquid threshold ADC value boundary at a second period in time, decreases from over the air/liquid threshold ADC value boundary to between the air/liquid threshold ADC value boundary and a secondary threshold ADC value at a third period in time, and passes a stability test while being disposed at a fourth period in time between the air/liquid threshold ADC value boundary and the secondary threshold ADC value. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification