Hey all! We do a new workup on a patient every three days, unless it is a surgical patient who's qualified for "preadmit" antibody screens which lasts 14 days. I wish we'd do this where I currently work, but where I used to work, we would run a selected cell screen for patients who have previous known antibodies. We would also run a cell positive for the known antibody to see if it is still reactive. If the selected cell screen is negative, then we know that the patient hasn't developed any new antibodies. Depending on what the antibody is and whether or not it is currently reactive, we would perform either an immediate spin or AHG (gel) crossmatch. Where I am working now, we do not have a way to bill for a selected antibody screen yet, so we are running a regular 3-cell screen and then a selected panel if we get positive reactions in the screen.