What are the reasons for low oxygen partial pressure

summary

Low oxygen partial pressure is a kind of disease in the elderly. Often for cough, chest tightness and other symptoms. Only go to the hospital to check can determine the cause of disease, many people are not very aware of this. Now let's take a look at the reasons for the low oxygen partial pressure.

What are the reasons for low oxygen partial pressure

First, the patient has atrioventricular defect and pulmonary hypertension. After the decrease of left heart pressure, the right to left shunt appears or increases, resulting in the decrease of oxygen partial pressure. There is critical ventilation and blood flow imbalance (such as atelectasis). Nitroglycerin can aggravate the ventilation and blood flow imbalance of the lung, causing hypoxemia.

Second: the patient has atrioventricular defect and pulmonary hypertension. After the decrease of left heart pressure, the right to left shunt appears or increases, leading to the decrease of oxygen partial pressure; or there is critical ventilation and blood flow imbalance (such as atelectasis). Nitroglycerin can aggravate the ventilation and blood flow imbalance of the lung, causing hypoxemia.

Third: under normal conditions, PaO2 should be 200 ~ 250 mmHg, and there is no air leakage during manual ventilation. Obviously, there is oxygen exchange disorder (diffusion disorder, ventilation and blood flow disorder, or shunt, FIO 244% is 67%, SpO 2 gradually rises to 95%. Blood gas analysis shows that the oxygen partial pressure is 66 mmHg, SpO 2 is 92%, and oxygenation index is 100 at this time, highly suspected of lung injury.

matters needing attention

The situation of low oxygen partial pressure can be large or small, we should not ignore it. If there are similar symptoms, we should go to the hospital immediately for examination. In addition, good eating habits and exercise programs are also conducive to the prevention of symptoms of low oxygen pressure.