Brain Death: Symptoms, Causes, Treatment
موت الدماغ
Brain death means permanent loss of brain function, including the brainstem, established using strict diagnostic criteria. It differs from coma and cannot be inferred from unresponsiveness alone.
What is Brain Death?
The heart may continue beating with respiratory and circulatory support, but this does not demonstrate awareness. Specialist explanations help families distinguish organ support from neurological recovery.
Related reading: Coma as a condition distinct from brain death.
Symptoms
Criteria include absent consciousness, brainstem reflexes and independent breathing during specialized testing. Spinal reflex movements can remain and should not be interpreted as evidence of awareness.
Causes
Catastrophic injury from major bleeding, head trauma or prolonged oxygen deprivation can cause brain death. Knowing the cause alone is insufficient to establish the diagnosis.
Risk factors
Severe irreversible brain injury underlies these cases. Ventilator use or a low consciousness score alone cannot establish brain death.
Diagnosis
Qualified clinicians confirm permanent injury and exclude sedatives, hypothermia and reversible disturbances. Examination, safely conducted apnea testing and any necessary ancillary tests follow the applicable protocol.
Treatment
Treatment cannot restore brain function after brain death is correctly established. Clinicians explain findings and subsequent care under local requirements; organ donation is a separate discussion, not a diagnostic criterion.
Complications
Correctly established brain death is not a coma from which awakening is expected. Hormonal and circulatory instability may follow; families need clear communication and psychological and social support.
Prevention
Head-injury prevention, vascular-risk treatment and rapid cardiac-arrest response can reduce causes of catastrophic injury. No home intervention prevents or reverses established brain death.
When to see a doctor
Unresponsiveness or abnormal breathing calls for emergency help and resuscitation instructions, not self-diagnosis of death. Families can ask the team to explain tests, excluded confounders and procedures.