What causes anoxic encephalopathy?

Anoxic encephalopathy, or hypoxic-ischemic brain injury, is a process that begins with the cessation of cerebral blood flow to brain tissue, which most commonly results from poisoning (for example, carbon monoxide or drug overdose), vascular injury or insult, or cardiac arrest.

Is anoxic encephalopathy life threatening?

Anoxic encephalopathy, a brain injury related to cerebral hypoxia and cerebral anoxia, types of hypoxic-anoxic injuries (HAIs) is a serious, life-threatening injury; it can cause cognitive problems and disabilities.

Is anoxic brain injury traumatic?

Unlike traumatic brain injuries, in which brain damage is induced by direct physical trauma, anoxic and hypoxic brain injuries are characterized by brain damage from a lack of oxygen to the brain.

Can anoxic brain cause seizures?

Seizures are quite common after an anoxic brain injury and they can be prolonged and sometimes difficult to bring under control. This is a stage of critical illness and the full range of intensive care support is needed to give the best chances of survival and the best possible outcome.

How is anoxic encephalopathy diagnosed?


  1. CT scan.
  2. MRI scan.
  3. Electroencephalogram (EEG)—a test that measures the electricity in the brain.
  4. Single-photon emission computed tomography (SPECT) scans—a type of CT scan that looks at parts of the brain.
  5. Evoked potential tests—tests used to check the senses.

How do you get anoxic brain damage?

Here are seven causes of anoxic brain injury:

  1. STROKE. When someone experiences a stroke, a portion of the brain doesn’t receive adequate blood and oxygen, leading to the potential death of affected brain tissue.

Can you wake up from anoxic brain injury?

After a traumatic brain injury, individuals may fall into a deep state of unconsciousness called a coma. While it’s impossible to wake someone out of a coma, there is always hope that they may regain consciousness.

What part of the brain dies first without oxygen?

In particular, the temporal lobe (at the temples) is sensitive to oxygen deficiency which is also where the memory is situated. A lack of oxygen from three to nine minutes can result in irreversible brain damage! In case of a cardiac arrest a CPR (Cardiopulmonary resuscitation) is best started within two minutes.

What happens if the brain is without oxygen for 20 minutes?

According to MedlinePlus, a resource of the U.S. National Library of Medicine: “Brain cells are very sensitive to a lack of oxygen. Some brain cells start dying less than 5 minutes after their oxygen supply disappears. As a result, brain hypoxia can rapidly cause severe brain damage or death.”