Our blood center is 2 hours away, and like others have said, our biggest problem product is Platelets. We keep some on hand, but sometimes run out and need to get shipments off schedule. Another product difficulty is when you need to order those 'rare' antigen typed units. How many to get is always a game. Another impact is your ability to ID complex antibodies. We rarely send anything to our reference lab, just because of the time and logistics. So, even though we have all generalists, we are pretty good at ABID.