How can you distinguish between a brain injury caused by hyponatremia and a brain injury caused by anoxia or hypothermia or bypass?

Answer 1

Hyponatremia occurs when there is a serious deficiency of sodium in the blood. Blood tests would be able to detect whether this is the problem.

Anoxic brain injury is the result of a major lack of oxygen to the brain. When the brain doesn't receive proper amounts of glucose and oxygen, nerves in the cortex where cells originate are damaged. It takes about five minutes for lack of oxygen to permanently damage the brain. Anoxic brain injury causes diffuse damage, meaning that it causes damage throughout the brain. Causes of Anoxic Brain Injury There are three types of anoxic brain injury. Anemic anoxia is a result of blood that doesn't carry enough oxygen. Toxic anoxia is caused by toxins that block oxygen in the blood from being used. Anoxic anoxia occurs when no oxygen is supplied to the brain. Common causes of all three types include: * Respiratory arrest * Drowning * Heart attack * Carbon monoxide inhalation * Poisoning Symptoms of Anoxic Brain Injury While symptoms will vary based upon the area of the brain that's affected, common signs of anoxic brain injury include: * Cognitive issues * Weakness in arms and legs * Lack of coordination; abnormal movements * Visual problems * Emotional and behavioral problems Prognosis for Anoxic Brain Injury Degree and rate of recovery is highly dependent upon individual circumstances. The amount of time spent unconscious or in a coma, as well as how much is recovered within the first month, are good indicators of long-term recovery.

http://www.brainandspinalcord.org/traumatic-brain-injury-types/anoxic-brain-injury/index.html