Haematology Analyser
Raghbir Singh Khandpur · Compendium of Biomedical Instrumentation · 2019
This chapter discusses the purpose, principle of operation, specifications, and applications of haematology analyser. Haematology analysers are computerized, highly sophisticated machines that are designed to count the number of different types of red and white blood cells, blood platelets, haemoglobin, and haematocrit levels in a blood sample. The percentage of cells in the blood is called the haematocrit value or packed cell volume (PCV). The majority of the corpuscles in blood are red blood cells (erythrocytes), others being white blood cells (leucocytes) and platelets (thrombocytes). The most common and routinely applied method of counting blood cells, particularly in small laboratories, is the microscopic method. The most popular method for counting blood cells is electrical conductivity method. The complete blood cell count (CBC) and differential leucocyte count (DLC) form part of important laboratory investigations, used both by general physicians and by medical specialists and researchers.