Red Blood Cell Antibody Identification

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Also known as: Alloantibody Identification; Antibody ID, RBC; Ab ID
Formal name: Red Blood Cell Antibody Identification
Related tests: Direct Antiglobulin; Indirect Antiglobulin; Blood Typing; Type and screen; Crossmatch

At a Glance

Why Get Tested?

To identify the specific antibody present when a direct antiglobulin test (DAT) or indirect antiglobulin test (IAT) is positive; to help identify the cause of a transfusion reaction or the cause of haemolytic disease of the foetus and neonate (HDFN)

When to Get Tested?

Red cell antibody identification will be performed when an antibody screen using the IAT is found to be positive during a routine ‘group and save’ investigation which may be performed as a routine antenatal screening tests, prior to a blood transfusion or prior to surgery where a blood transfusion may be required; when a person has a positive DAT following a suspected transfusion reaction or is suspected to have an autoimmune haemolytic anaemia; when a newborn has HDFN.

Sample Required?

The test is performed on a sample of blood obtained from a vein in the arm using a needle. This is a process which may be referred to as ‘venepuncture’.

Test Preparation Needed?

None