DETERMINATION OF ANALYTES IN BIOLOGICAL FLUIDS IN THE PRESENCE OF SUBSTANCES INTERFERING WITH ASSAYS THEREFOR

摘要

A method is provided, in one embodiment, for the determination of an analyte in a biological fluid sample in the presence of a substance interfering with an assay for the analyte. This embodiment is implemented by using antibodies to cause the selec- tive immunoreaction of at least one of the analyte or the interfering substance and then conducting an assay for the analyte in at least one of the immunoreactants or the non-reactants. Another embodiment provides a disposable reaction device to implement the method. The invention is applicable to the detection of a wide variety o f analytes, including cholesterol in a targeted lipopro- tein class in the presence of cholesterol in another class; to targeted isozymes of enzymes such as creatine kinase, lactate dehy- drogenase, amylase, and alkaline or acid phosphatases in the presence of oth er isozymes; as well as to targeted immunoglobulins in the presence of non-targeted immunoglobulins.