What Is Cerebral Anoxia?

Cerebral anoxia refers to the occurrence of different degrees of brain dysfunction when the supply or utilization of oxygen cannot reach the minimum level required for the metabolism of brain tissue. Expressing mental retardation, slow response, drowsiness, feeling tired without great physical exertion, distressed heart, fluctuating mood, change of temperament with dizziness, headache, etc. The method of rapid relief can appropriately inhale oxygen. Symptoms can be relieved after 0.5 to 1 hour.

Basic Information

English name: Brain Hypoxia
Visiting department: Neurology
Common locations: Brain

Common causes: Altitude sickness, respiratory disorders, cerebrovascular disease, cervical spondylosis, anemia, Meniere's disease, etc.
Common symptoms: Slow thinking, slow response, drowsiness, fatigue, mood swings, altered temperament, with dizziness, headache, etc.

Causes of cerebral hypoxia and common diseases

1. Hypoxia environment and disease

Generally, the concentration of oxygen in the atmosphere is about 21%, and the human body will feel uncomfortable in an environment with an oxygen concentration of less than 18%. Disease, geriatric disease, etc.

2. Overuse of the brain

(1) A long period of mental work will increase the brain's rate of oxygen consumption, and this excessive consumption of oxygen by the brain will not cause the compensatory breathing rate and heartbeat of the human body to accelerate.

(2) The brain is sensitive to hypoxia.

(3) The chest cavity is compressed for a long time while working at desk, and cerebral hypoxia caused by insufficient ventilation is also one of the causes that cannot be ignored.

Brain hypoxia test

Blood pressure can be low in the normal range, and it can also be high or low, and closed eyes can cause nystagmus. Cerebral blood flow examination showed insufficient blood supply.

Differential diagnosis of cerebral hypoxia

Cerebral ischemia

The transient insufficient blood supply to the brain with symptoms is called a transient ischemic attack and is a common acute cerebrovascular disease. Sudden onset of the patient, similar to the performance of cerebral hemorrhage or cerebral infarction, usually completely returned to normal within 24 hours, but can be recurrent. Patients with transient ischemic attack may develop cerebral infarction within 1 to 5 years.

Hydrocephalus

Hydrocephalus is a general term for cerebrospinal fluid generation or circulatory absorption due to obstacles caused by excessive amounts of cerebrospinal fluid and increased pressure, which expands the space occupied by normal cerebrospinal fluid, resulting in secondary cranial pressure and enlarged ventricles.

3. Brain Edema

When the cerebrospinal fluid flowing through the ventricle is blocked by the pathway and cannot flow downstream due to bleeding, the hydraulic pressure causes the brain to swell, compressing the brain, and causing brain dysfunction is called cerebral edema.