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The damage of Hypoxia
Hypoxia refers to be lack of oxygen in the body. Because of the low oxygen levels in the blood, the carried oxygen
to other organs and tissues is not enough, then, each system of the body will
be affected. The short
time hypoxia can cause body feeling unwell, for a long time hypoxia, it can
cause tissue lesions.
Mainly, there are three kinds of reasons that lead to the hypoxia.
The first one is the barrier type for oxygen intake. The respiratory disease
like asthma and COPD ect are the main hypoxia cases; The second one is transport
barriers, we know the oxygen is mainly transported by the blood, if it happens
problem, then it will cause the human tissue hypoxia and the result is lesions.
The coronary heart disease, atherosclerosis, cerebrovascular disease and anemia
belong to this kind. The third one is excessive consumption type, the most
common is those who overstrain their nerves.
Hypoxia will bring much damage to our bodies, and below are the main clinical manifestations of the hypoxia for
main organs:
1. Cerebral
anoxia: The brain's response to hypoxia is extremely obvious. To a able-bodied
person, the weight of the brain is 2% of the total body, but its oxygen
consumption accounts for 20% of the total ones, accounts for 1/6 of the oxygen
in the blood (cardiac output). If the brain is anoxic, then, the headache/ restlessness/ drowsiness
and encephaledema will happen; If the anoxia lasts above 4mins, then the brain
cell will be irreversible necrotic, and comes to disturbance of consciousness, hyperspasmia, coma and finally death.
2.Heart Hypoxia: For the
mild hypoxia, it will increase myocardial contraction, quicken the heart rate,
enlarge the cardiac output, increase the pressure or make the pressure decline.
If it is severe, both the blood pressure and heart rate will decline, then it
will lead to the myocardial necrosis, cardiac failure, cardiac arrhythmia,
shock, even the sudden cardiac arrest.
3. Lung Hypoxia: to the mild hypoxia, breathing movement increases
and the breath becomes faster and deeper. If it is severe, the respiratory
center will be inhibited, and then leads to dyspnea, breathing arhythmicity, cyanosis,
laryngeal edema, pulmonary edema, artery contraction, and enhance the pressure
of pulmonary vascular resistance & pressure of artery.
4. Liver
hypoxia: it will make the liver function lesion been damaged and occur Liver
edema, ect.
5. Retinal hypoxia: we’ll have dim eyesight and be loss of vision.
6. Renal hypoxia: it can cause kidney disorders, oliguria, no
urine, easily induced urinary tract infection.
7. Blood hypoxia: we’ll be giddy, flustered, heart beat faster, and
be predisposed to high blood pressure, coronary heart disease, thrombosis,
myocardial infarction, angina, ect. Meanwhile, the body's immune function will decline
and the disease resistance be weaken.
If the body is in a state of chronic hypoxia for a long time, it
is easy to cause cancer.
Nowadays, the hypoxia is becoming more and more common, we shall
pay enough attention to it.
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