Compatibility
To ensure that you and the recipient of your kidney are compatible, your tissue must be mixed with the recipient's blood to ensure he or she does not reject it. This test is called a cross match.
Virtual cross matches can be done initially if the recipient is not sensitized. A final cross match is always done leading up to surgery.
If you and the recipient are blood type compatible and the recipient has NOT had a previous transplant, the chances that you will be cross match compatible are extremely good.