Which of the following are the clinical criteria for determining brain death?

• A. Unresponsive coma; absence of brainstem reflexes; apnea with positive apnea test; exclusion of confounding factors; confirmatory tests if needed.
• B. Coma with purposeful movement and intact brainstem reflexes.
• C. Sleep-like state with normal EEG.
• D. Only absence of respiratory effort.

Answer: (A)

Brain death is diagnosed only when there is irreversible loss of all brain function, demonstrated through a structured clinical assessment that rules out reversible conditions. The core sequence includes an unresponsive coma, absence of brainstem reflexes, and an apnea test showing no spontaneous respirations, along with excluding factors that could mimic brain death. If any confounding factors like hypothermia, metabolic disturbances, or sedative drugs could be responsible for the findings, they must be corrected or accounted for before declaring brain death. When the clinical exam cannot be completed or is inconclusive, confirmatory tests for cerebral blood flow or metabolism may be used to support the determination. In this framework, simply lacking respiration or having a sleep-like state with a normal EEG do not meet brain death criteria, and partial or isolated signs of brain activity (like purposeful movement or preserved reflexes) also do not indicate death of all brain function.