Final answer:
The Hartford Consensus emphasizes key strategies for mass casualty events using the THREAT acronym, and for immediate blood transfusions, type O negative blood is used.
Step-by-step explanation:
The Hartford Consensus encompasses strategies and principles designed to improve survival in mass casualty situations. The Consensus highlights the THREAT acronym, which stands for Threat suppression, Hemorrhage control, Rapid Extrication to safety, Assessment by medical providers, and Transport to definitive care. In critical situations like a major motor vehicle accident, when there's no time to determine the patient's blood type, type O negative blood is used for transfusion because it is considered the universal donor blood type and is safe to administer in emergencies to most patients.