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Malcolm, you make me laugh. Just like a bull dog, once you get hold of something you just can't let go. I think the moto from a place I once worked is appropriate. "An exercise in futility is better than no exercise at all!"

If you have sorted out what is causing the unusual reaction pattern, then it is no longer a discrepancy. However, I would still not perform an electronic cross-match, AS THERE IS NO SUCH THING (a computer does not, and never has, performed a cross-match). I would, however, perform ELECTRONIC ISSUE.

They obviously do! Patty, PLEASE do not think I was getting at you. As you will guess from John's post above, this is (just) one of my pet hates. It was nothing personal!

It is anti-c. In my country, hospital blood bank still do the blood procurement, not by agency like Red Cross etc, so getting the whole blood is not a problem. We usually standby few pints of whole blood in our inventory.

If you haven't already, you should keep a copy of this response, Malcolm. I have lost track of how many times this issue has come up here! Scott

Thank you for the clarification Malcolm. By the way this came right out of the current CAP standards. Maybe they need to be schooled too COMPUTER CROSSMATCHES A computer crossmatch is an electronic method that is used to confirm that the unit is appropriate for transfusion to the intended recipient through the use of validated software logic to determine compatibility, rather than serologic techniques. For laboratories that employ computer crossmatching, serologic crossmatch techniques must be employed when ABO typing discrepancies are present (e.g. mixed field reactivity, missing serum reactivity, apparent change in blood type post hematopoietic stem cell transplant).