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氧的药效氧对机体细胞的生长来说,是必不可缺少的,动脉血中含19～20%(V/V)的氧和48～50%(V/V)的二氧化碳,静脉血中含12～14%(V/V)的氧和56～58%(V/V)的二氧化碳,它们与含14.5～15%(V/V)的氧和5.5%(V/V)二氧化碳的肺泡里的空气接触,静脉血进行气体交换。大气中一般虽含氧约21%,既使在我们吸入的空气中增加了氧,也不会引起障碍。例如,即便吸入100%(V/V)的氧,血液中氧的量也只能增加11
Oxygen’s pharmacodynamic oxygen is indispensable for the growth of the body’s cells. Arterial blood contains 19 to 20% (V/V) oxygen and 48 to 50% (V/V) carbon dioxide in the venous blood. Contains 12-14% (v/v) oxygen and 56-58% (v/v) carbon dioxide, and alveoli with 14.5-15% (v/v) oxygen and 5.5% (v/v) carbon dioxide The air is in contact with the venous blood for gas exchange. Although the atmosphere generally contains about 21% oxygen, even if oxygen is added to the air we inhale, it will not cause any obstacles. For example, even if 100% (V/V) oxygen is inhaled, the amount of oxygen in the blood can only increase by 11