Summary

If you need to have a blood transfusion it is essential that you are given blood that is similar or compatible to your own to prevent reactions to the transfusion and potentially severe illness. The laboratory will identify your blood group and whether you have any additional red cell antibodies. With this information they will select the most compatible blood to your own, known as a crossmatch.
 

Why get tested?

You can find out how blood is classified or grouped in Blood group test and there is information about testing for additional red blood cell antigens in Red Cell antibody screening. After your blood group is identified and it has been decided whether you have any other antibodies to red cell antigens the laboratory may perform a third type of test to ensure that the blood that is going to be transfused is compatible with your own.

This final test is known as a crossmatch and involves taking a sample of the blood that has been selected for your transfusion and checking there is no reaction with any antibodies that have been previously identified in your blood.  This is to ensure that there is no adverse reaction and that the selected blood is compatible.

Having the test

Sample

A blood sample drawn from a vein in the arm.

Any preparation?

None
 

Your results

The crossmatch test is the final check to ensure that any blood transfused to you is compatible with your own.

Questions to ask your doctor

The choice of tests your doctor makes will be based on your medical history and symptoms.   It is important that you tell them everything you think might help. 
You play a central role in making sure your test results are accurate. Do everything you can to make sure the information you provide is correct and follow instructions closely.

Talk to your doctor about any medications you are taking. Find out if you need to fast or stop any particular foods or supplements. These may affect your results. Ask:

• Why does this test need to be done?
• Do I need to prepare (such as fast or avoid medications) for the sample collection?
• Will an abnormal result mean I need further tests?
• How could it change the course of my care?
• What will happen next, after the test?

More information

Pathology and diagnostic imaging reports can be added to your My Health Record. You and your healthcare provider can now access your results whenever and wherever needed.

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