I need to predict how much plasma would go to waste if we kept some thawed at all times for traumas. We would probably have to use A's since AB's are in such short supply and we would convert all our non-pediatric plasma to a 5 day outdate. We are a 250 bed hospital in a rural area, level II trauma center and we get around 2 massive transfusions called on traumas per month (not all turn out to be true massives). We transfuse about 90 FFP a month currently to all patients. We do some open heart surgery but they don't use much plasma. We do occasional plasma exchanges via apheresis which might drive up our totals when we have such a patient. I just need a ballpark idea whether we will waste 20%, 50% or 80% of the plasma we keep thawed so I can estimate the financial and supply impact. Thanks for any input on how to make this estimate.