[Principles of the calculation of blood corpuscles in biological fluids, by using slide trays]

Counting blood corpuscles in biological fluids, by using slide trays is a current, rapid, and convenient method. For their adequate calculation, it is necessary to know the volume of biological material under the chamber array of a slide tray, the total volume of the chamber in microl, and the degree of biological material concentration. When the Nechiporenko test reveals single urinary costs, it is recommended to count the latter in the whole chamber of a slide tray, followed by division of their count by the total volume of the chamber in microl. All required data must be given in an instruction for slide trays.