Patent ID: 6509192
Filing Date: 2003-01-21
Classification: G01N,Y10T

Abstract:
A method for using a hematology control product to determine an instrument malfunction cause comprising:a. placing a hematology control product in an instrument which differentiates at least four populations of leukocytes based on electrical and optical parameters, said control product containing at least one leukocyte analog which has been derived from a blood cell which has been treated so that it is resistant to degradation by the lytic reagents used in hematological test procedures; b. analyzing said hematological control product in the instrument to obtain at least two values selected from DC MEAN, DC standard deviation, RLS MEAN, RLS standard deviation, opacity mean, opacity standard deviation, and COUNT RATIO, PEAK TO VALLEY RATIO, WHITE TIME and DATE TIME and combinations thereof; and c. determining a cause of a malfunction of said instrument from said values of said measured parameter.