The word "doa" appears to be a typo or an abbreviation. It is likely intended to be "do" or "doa" could be referring to "doa," which is sometimes used to mean "dead on arrival" in medical contexts. In this case, it describes a patient who is pronounced deceased upon arrival at a hospital or medical facility.
The term "dead on arrival" originates from the medical field, where patients brought to the hospital in such a state are noted as being unresponsive and do not show signs of life.
If "doa" is not what you meant and you intended another word, please clarify.