Sample Indexes The samples indexes are provided by the Hitachi 911 as an aid to evaluating the quality of the sample for chemical analysis. These indexes are more objective and consistent than visual assessment of a sample. Hemolysis, lipemia and icterus in a sample can, in some cases, interfere with accurate measurement of clinical chemistry analytes (see analytical variables). Guides as to which tests are affected at different levels for each index are provided with the chemistry results from Cornell University. These are guidelines only (many are based on data from humans and may not be applicable to animals) and should be used judiciously to assess the impact of these interferences (lipemia, hemolysis, icterus) on the chemistry results. When doing this, it is very important to interpret these values along with the clinical signs displayed by the patient and the remaining laboratory results, i.e. they should never be used alone. Remember that the effect of these interferences on chemistry results are also dependent on the analyzer and methods used. They cannot be transferred from one laboratory's results to another.