Antigen screening- We screen units with the patient's plasma if the antibody is showing, then we antigen type using commercial antisera in the tube those that were compatible. If the antibody is not showing strong enough, you can use gel Igg cards or buffered gel and test units with the commerical antisera. Since we have not validated this in gel, we would confirm with a tube test. 2nd ABO type- I hope it is not a state requirement. We just went to electronic Xm and we do a forward type to confirm on the smae sample.