Why get tested?
To enable the transfusion laboratory to select and issue the most appropriate and compatible blood for a transfusion.

When to get tested?
If your doctor indicates that transfusion with blood or blood components may be required as part of your medical treatment.

Sample required?
A blood sample drawn from a vein in the arm.

Frequency of testing?
These tests will be performed prior to receiving a blood transfusion. Where medical treatment requires ongoing transfusions over a period of time the crossmatch will be repeated every 72 hours in order to reduce the possibility of a transfusion reaction.