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Auto Immune Haemolytic Anaemia (AIHA) is one of the most common types of acquired haemolytic anaemias. Its main cause is auto-antibody mediated rapid destruction of Red Blood Cells (RBCs). Demonstration of a positive Direct Antiglobulin Test also known as Coomb's test, against these autoantibodies is the crucial serological assay in the diagnosis of AIHA. This routinely used test has the disadvantage of low sensitivity and does not detect low levels of red cell auto antibodies leading to false negative results sometimes. Flow cytometry can effectively diagnose such patients with low levels of autoantibodies. This study was carried out in a tertiary care center, where patients with suspected AIHA were studied during 2 years period. Blood samples of suspected patients of AIHA were tested by both Gel Card Test and by Flow-cytometry for detection of RBC bound IgG. A total of 50 patients with suspected diagnosis of AIHA were studied by flow-cytometry as well as by Gel card test for detection of RBC bound IgG. Out of these 50 cases, 41 cases have turned out to be positive and 9 were negative by flow-cytometry. By Gel card test, out of 50 cases, 34 were positive and 16 were negative. Therefore, there were 7 cases which were negative for RBC bound IgG by Gel card test and these were positive by flow-cytometry. Flow-cytometry is a reliable and more sensitive method and can be used as a new routine diagnostic technique for AIHA.

Utilisation of Flow-cytometry in the Diagnosis of Auto Immune Haemolytic Anaemia