System and method for detecting occlusion using flow sensor output
First Claim
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1. A method of detecting an occlusion within an infusion system comprising:
- monitoring an output signal from a flowrate sensor as fluid flows through a fluid pathway of the infusion system to a patient;
acquiring a baseline of the output signal of the flowrate sensor;
filtering the baseline with an averaging filter to calculate a baseline average;
calculating a threshold level as a percentage of the baseline average;
filtering the output signal with a noise reduction filter to obtain a filtered output signal; and
activating an alarm if the filtered output signal falls below the threshold level.
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Abstract
A method and system for detecting an inclusion within an infusion system. The method includes monitoring an output signal of a flowrate sensor as fluid flows through an infusion system. The output signal is then converted with a noise reduction filter to obtain a filtered output signal. The filtered output signal is compared to a threshold value and an alarm is activated if the filtered output signal falls below a desired threshold, thereby indicating an occlusion within the infusion system.
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Citations
14 Claims
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1. A method of detecting an occlusion within an infusion system comprising:
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monitoring an output signal from a flowrate sensor as fluid flows through a fluid pathway of the infusion system to a patient; acquiring a baseline of the output signal of the flowrate sensor; filtering the baseline with an averaging filter to calculate a baseline average; calculating a threshold level as a percentage of the baseline average; filtering the output signal with a noise reduction filter to obtain a filtered output signal; and activating an alarm if the filtered output signal falls below the threshold level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An infusion system, comprising:
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a fluid pathway between a fluid source and a patient; a flowrate sensor disposed along the fluid pathway, the flowrate sensor operable to produce an output signal; a processing device in communication with and receiving the output signal from the flowrate sensor, the processing device configured to (i) acquire a baseline of the output signal of the flowrate sensor, (ii) filter the baseline with an averaging filter to calculate a baseline average, and (iii) calculate a threshold value as a percentage of the baseline average, and (iv) apply a noise reduction filter to the output signal to produce a filtered output signal; and an alarm operable with the processing device to indicate when the filtered output signal falls below the predetermined threshold value. - View Dependent Claims (13, 14)
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Specification