Oxygen concentrator sellers are rampaging here in the adjacent canal. They are bullshit about the fact that it is useful to everyone. In fact, this is not the case.
An oxygen concentrator is useful for those who have decreased oxygen saturation. Everyone knows about saturation now. Literate. But for people with normal oxygen levels in the blood, excess oxygen from the concentrator can harm.
Not everyone gets it, because the myth of the unconditional usefulness of oxygen is deeply ingrained.
Even 15 years ago, it was believed that oxygen is needed by all patients with myocardial infarction. Then something changed. Such thin instruments appeared that could literally be thrust into the arteries of the heart and measure the blood flow there with ultrasound. It turned out that excess oxygen in the blood causes a spasm of the arteries of the heart. It can make it worse.
This was explained by different effects.
Free radicals and nitric oxide
We have already discussed the beneficial expanding effect of oxide
nitrogen on our vessels. It is assumed that excess oxygen in the blood will produce more free radicals, which are poorly adjacent to nitric oxide. From this nitric oxide will be less, and the vessels will more often be narrowed.Muscle
Inside the heart arteries there is a layer of muscle cells that causes the arteries to spasm. So, excess oxygen cleverly affects the channels for potassium, sodium and calcium ions in muscle cells, from which they go crazy, are highly excited, contract and reduce the lumen of the heart arteries.
Hormones
There, a bunch of hormones and other biologically active substances float in the blood, which, with an excess of oxygen, act differently.
Past the checkout
Our body also has an interesting robbery mechanism. If you force a person to breathe a gas mixture with a high oxygen content, then part of the blood in the organs is shunted. That is, it turns around halfway and does not reach its destination.
Like why buy those organs that are not in poverty anyway. Sometimes such a shunting process is carried out with brute force, and even less oxygen reaches the organs than when breathing with ordinary air. It turns out that what we fought with - we ran into it.
Shorter
Not everyone realizes (and not even all doctors) that oxygen itself causes narrowing of blood vessels.
The pulse oximeter shows 100% saturation of hemoglobin with oxygen, but it is not always possible to determine how much oxygen has been packed into the blood at that moment. Oxygen can dissolve in the blood even without hemoglobin. It is very often unhealthy to overdo it. Some of the cores may die from this.
