System and method for detecting occlusion using flow sensor output

摘要

A method of detecting an occlusion within an infusion system, comprising: monitoring an output signal from a flowrate sensor as a pulsatile fluid flow having a frequency flows through the infusions system; acquiring a data set that includes the output signal as a function of time; filtering the data set with a noise rejection filter to produce a filtered data set; performing spectra analysis on the filtered data set to determine strength of the output signal in a frequency domain; calculating a signal strength for a frequency range that correlates to the frequency of the pulsatile fluid flow; and comparing the signal strength of the range to at least one threshold level to determine if an occlusion is present within the infusion system.