Ambulances Across U.S. Now Stocking Blood For Emergency Transfusions In The Field

More ambulance services across the United States are administering blood transfusions at trauma scenes before patients reach hospitals, a practice the military pioneered that research shows can reduce trauma mortality by 37 percent. The National Highway Traffic Safety Administration awarded $50 million on April 10, 2026, to expand prehospital blood programs, with roughly 300 of the nation's 15,000 EMS agencies now operating such programs—up from only a few dozen two years ago.

Paramedics with AMR Hartford, an ambulance service in Connecticut, now carry type O blood and specialized warming equipment when responding to severe trauma calls. Paramedic Tia Olson, a field supervisor, said patients experiencing massive blood loss show visible improvement within one to two minutes of receiving a transfusion in the field: their vital signs stabilize, skin color returns, and consciousness often returns. Type O blood works for patients of all blood types, making it practical for emergency use before a patient's specific blood type can be determined.

Dr. John Pettini, the EMS medical director for St. Francis Hospital in Hartford, emphasized the urgency of early transfusion. For every minute a transfusion is delayed in severe hemorrhagic shock, mortality increases, he said. Even in urban settings where hospitals are nearby, administering blood on scene rather than waiting for hospital arrival saves lives because the transfusion begins sooner.

The practice originated in military medicine, where it was credited with improving survival rates for combat casualties. Pettini noted that military personnel called the intervention "Jesus juice" because of its dramatic effect on patients who appeared near death. The American College of Emergency Physicians cited research showing that prehospital blood administration leads to a 37 percent reduction in mortality compared to waiting for hospital transfusions.

NHTSA Administrator Jonathan Morrison said his agency is prioritizing rapid expansion of the programs. The $50 million in funding is being distributed to ambulance services across diverse regions, from rural Oregon to Tampa, Florida. Morrison stated that if resources were unlimited, he would make prehospital blood programs available to every EMS agency interested in implementing them.

Context

Hemorrhage is a leading cause of death for trauma patients, including those injured in vehicle crashes, shootings, and other accidents. Historically, patients with severe blood loss had no treatment option until arrival at a hospital emergency department, a delay that often proved fatal. The shift to prehospital transfusion represents a fundamental change in trauma care protocol, moving critical intervention from the hospital to the ambulance.

The expansion reflects a broader recognition within emergency medicine that early intervention saves lives. The military's success with the practice in Iraq and Afghanistan provided proof of concept that civilian EMS systems could replicate. The rapid growth from a few dozen programs two years ago to 300 programs today indicates that ambulance services and health systems view the practice as viable and necessary.

What's Next

The NHTSA's stated goal is to increase the number of EMS agencies with prehospital blood programs, though the specific timeline and target number have not been announced. Barriers to faster adoption include the logistical challenges of maintaining blood at proper temperatures during transport and managing expiration dates, requiring ambulance services to maintain ready supplies and rotate stock regularly. As more agencies implement programs, data collection on outcomes will likely inform whether the 37 percent mortality reduction figure holds across different regions and patient populations, potentially driving further policy changes in emergency medicine protocols.