By testing the probe of the liver function reserve analyzer, the accuracy of its detection function is evaluated to ensure the accuracy and validity of the detection results of the liver function reserve analyzer. Using the probe's detection sensitivity to the concentration of indocyanine green drugs, detect different concentrations of indocyanine green after dilution and compare the detection results with the actual concentration of indocyanine green to verify the accuracy of the probe.After comparison, it is found that under ideal test conditions, the detection accuracy error of the probe within 2 years is less than 0.5%, the detection accuracy error of the probe using 2-4 years is about 1%, and the detection accuracy error of the probe using morethan 4 years is greater than 2%. In order to ensure the accuracy and validity of the test results of the liver function reserve analyzer, the probe used within 2 years should be tested 1-2 times a year, the probe used for 2-4 years should be tested 2-4 times a year, and the probe used for more than 4 years The probe should be tested once a month or directly replaced with a new probe.