While thinking about the trauma patient call, I remembered this old topic about 66% of trauma patients arriving to the ER in a hypothermic state (not due to intentional hypothermia). I searched for it as a topic and did not find it, so if it has been discussed already I apologize. But think about it:
We cut their clothes off, dump a bunch of cold IV fluid in them (at best your fluid is the same temperature as the ambient air in the truck, which is probably 60-70 degrees (probably worse in winter) after we lay them on a back board that is stored in an outside compartment (again could be really cold in winter months).
Do you always cover them with a good blanket, or a thin sheet ?