I started doing this kind of data dig before COVID, looking at appropriateness of transfusions in the ED. Similar to you, it's usually 1 unit transfusions, often in emergent settings but not MTP. I agree with @exlimey that the shotgun approach is usually what happens, and our retrospective looking is not comparable to the ED's initial read of the patient. Most often the dreaded "hypotension" is the reason for pushing products, regardless of H/H or active bleeding. We've done education to this point with our ED, and that includes our trauma patients, that a onesy-twosy red cell transfusion for low blood pressure is not appropriate. We haven't tracked the number of TYSCs ordered, but in our concurrent reviews, these are typically ordered for patients who may be pre-surgical, or to be admitted. I feel like they order TYSCs better than blood products at this point!