Patent ID: 7618821

Claim:
A method of making a stand-alone control for resembling an erythroblast population, comprising the steps of admixing in an aqueous diluent: a first cellular component including a plurality of a first group of processed animal red blood cells other than human blood cells; a second cellular component including a plurality of a second group of processed animal red blood cells other than human blood cells; and a third cellular component including a plurality of a third group of processed animal red blood cells other than human blood cells; wherein one or more of the first, second and third cellular components are composed of alligator red blood cells that have been fixed and swollen using a hypertonic solution and upon passing through an automated hematology analyzer the cellular components of at least one of the first, second and third cellular components are detected by the analyzer as white blood cells but fail to provide a white blood cell differentiation within ranges consistent with human whole blood, and at least one of the first, second and third cellular components is detected as an erythroblast on an automated blood analyzer that analyzes blood cells using impedance, optical measurements or both.