Below I have listed five causes of anoxia:
Obstruction to the air passages, for example in strangulation, smothering, pressure by haematoma, or any pressure from exterior the womb.
Lung conditions which prevents the air sacs filling with air, such as pneumonia, where they are filled with exudate, pulmonary oedema, or a collapsed lung.
Damage to the respiratory centre in the brain, or to the nerves supplying the muscles of respiration. This may be caused by a stroke, head injuries, barbiturate or morphine overdose, electric shock, tetanus, and in babies prolonged labour or any brain damage colse to the time of birth.
Poor oxygenation of the blood. This occurs in lasting bronchitis with emphysema, and with congenital defects of the heart in children, because not enough blood reaches the lungs owing to the mechanical defect. It also occurs in carbon monoxide poisoning, because carbon monoxide combines with haemoglobin and prevents it from carrying oxygen, and at high altitudes if oxygen equipment is not carried.
Haemorrhage. Because of the loss of red blood cells, there is too petite haemoglobin to carry enough oxygen. Severe anaemia may also cause anoxia for this reason.
There are many effects on the body that can be caused by anoxia. The brain is very sensitive to lack of oxygen. Sudden anoxia causes unconsciousness, and if the anoxia is complete and lasts more than two minutes, permanent brain damage can be caused, and if much longer, death.
Prolonged anoxia at the time of birth is a cause of reasoning handicap. More lasting anoxia, as in congestive heart failure causes reasoning blurring and irritability. A child with congenital heart disease who is anoxic has stunted increase and perhaps somewhat arrested reasoning development.
The kidneys are also damaged by anoxia. If the anoxia is acute, the patient may invent anuria and acute renal failure. If it is more chronic, there may be lasting renal failure.
The usual signs of anoxia is that the patient becomes blue, especially at the extremities and colse to the mouth. This is the main sign to look out for.
Bronchitis Lung Disease:Causes and Effects of Anoxia
ไม่มีความคิดเห็น:
แสดงความคิดเห็น