We use a Modify Products function in our computer(Cerner). For example, we modify a leukoreduced RBC to an irradiated leukoreduced RBC which has it's own computer code and charges. For CMV-, we add on a charge and add the attribute CMV- to the product in the computer. We keep track of the patients with a patient comment function in the computer. If they fail to order the special products, we call and ask if they want to continue to use special products. Sometimes they discontinue the order, in which case we add an additional comment. We also set up "dummy" antibodies (Anti-CMV and Anti-Irr) which work like antigen/antibody verification and alert the user in result entry. Hope this helps.