Dead on arrival
Look up dead on arrival in Wiktionary, the free dictionary.
Dead on arrival (DOA) indicates that a patient is unsalvageable, i.e. cannot be resuscitated, upon arrival at a medical facility. Dead in the field, brought in dead (BID), and dead right there (DRT) are terms which similarly indicate that a patient was found to be already clinically dead upon the arrival of professional medical assistance, often in the form of first responders such as emergency medical technicians, paramedics, firefighters, or police.
In some jurisdictions, first responders must consult verbally with a physician before officially pronouncing a patient deceased, but once cardiopulmonary resuscitation (CPR) is initiated, it must be continued until a physician can pronounce the patient dead.