Heparinized blood or defibrinated blood is preferred for osmotic fragility test because of tge absence of salts.EDTA, oxalates or sodium citrate will increase the salt concentration of blood and possibly skew the results.Heparin is the preferred anticoagulant for the osmotic fragility test.
@@eegashirisha2482 The enzyme-linked immunosorbent assay (ELISA) is the most common HIV test and is used to detect antibodies in serum . If the ELISA test is positive, a Western blot test is usually performed to confirm the diagnosis.
