Can a person breathe pure oxygen? How long can I suck?

Why are you so angry with oxygen today? Are there sick people in the house? Be careful when inhaling pure oxygen!

Generally, oxygen inhalation in a single nostril will not be poisoning, although it is pure oxygen, it has been mixed with air in the nostrils, so only oxygen-rich air is inhaled into the lungs, or the partial pressure of oxygen is greater than that in the air. But don't drive it too big, either.

I'm sorry, well, I won't say it anymore. But I really want to help you with what little I know, no bad intentions. Good bye.

I can't help but want to elaborate on it a little more, okay?

Oxygen, itself will not burn, the oxygen cylinder is close to the fire source is indeed possible**, but that is only because the oxygen cylinder itself has a high pressure (generally 10 to 10MPa, about equal to 10 to 15 atmospheres of pressure) With the increase of temperature, the pressure inside will increase, when greater than the maximum pressure that the cylinder can bear, it will expand the cylinder **, because a large amount of oxygen escapes, will make the combustibles near the fire source burn rapidly to form a larger**.

When you see the spark turn bright red, it means that the oxygen content in the gas of the tube is more than that in the air, and when the wood "rekindles" (that is, burns into flames), the oxygen content in the gas is about 60% or more.

The oxygen used in hospitals is indeed pure oxygen, and the content is generally above 99%. The doctor will adjust the flow of oxygen discharge according to the needs of the condition (a flow meter should be used when inhaling oxygen), and when using an oxygen mask, inhale a high content of oxygen-rich air (there are holes in the mask, which can enter some air), which is used for rescuing critically ill patients, and this method will not take a long time (generally up to dozens of minutes). The other way is catheter oxygen, and it is generally single-pore, and the other nostril is inhaled with air, that is, in this case, the maximum inhalation into the lungs is a mixture of 50% air and 50% oxygen, of which the oxygen content is up to 73%.

In fact, because the flow rate is adjusted to a certain level, the oxygen content inhaled is generally about 50%. This type of oxygen inhalation lasts for dozens of hours or even a few days, and there is generally no poisoning.

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In addition: under high pressure (deep water), nitrogen can be dissolved in the blood in large quantities, when rising rapidly from deep water, as the pressure decreases, the dissolved nitrogen will escape from the blood, because it is too late to be discharged from the lungs, it will form bubbles in the blood vessels, resulting in (multiple) congestion of blood vessels. This is known as diving sickness.

Helium does not dissolve in the blood, even under high pressure.

Oxygen therapy time is best based on the doctor's advice, and different conditions make Li's condition different.

In general, patients with hypoxia manifestations such as chronic obstructive pulmonary disease, bronchiectasis, bronchial asthma, and cor pulmonale are recommended to be treated for more than 15 hours a day.

Healthcare friends can take oxygen as prescribed, or for a few hours a day.

For friends with sleep apnea and chronic respiratory failure, if they use a non-invasive ventilator**, the effect will be better when combined with an oxygen concentrator.

The specific duration of oxygen inhalation depends on the patient's illness and the doctor's advice, and it is generally recommended that the patient inhale bright oxygen 3-5 times a day in leather stockings, ranging from 30 minutes to 2 hours each time.

Animals inhaling pure oxygen will be poisoned, and people are the same, if the human body is put into a pure oxygen environment with an atmospheric pressure, more than 24 will occur oxygen poisoning pneumonia, and finally die due to respiratory failure.

Oxygen toxicity is closely related to the duration of oxygen inhalation, and the longer the time, the more likely it is to develop oxygen toxicity. Oxygen entering the body will produce oxygen free radicals, which are extremely active and flow around the body, attacking and killing various cells, causing metabolic and functional disorders of cells and organs, and can promote gene mutations to induce cancer. Of course, there is oxidation and antioxidation, which is a kind of self-protection ability of the human body.

In the natural state of healthy people, the oxidative and antioxidant movements in the body are in a dynamic balance.

Yes! Absolutely! Inhaling pure oxygen does more harm than good, not good for blood**

None of the body's tissues can tolerate too much oxygen, because oxygen itself can react with unsaturated fatty acids without enzyme catalysis and destroy the phospholipids that store these acids, which are the main components of cell biofilms, which ultimately cause cell death, a process called lipid peroxidation. In addition, oxygen damages cells because it can produce free radicals that can induce cancer. Experiments have shown that the way to destroy cell culture is to place it in an environment saturated with oxygen.

Pure oxygen can reduce the body's blood supply to its own organs and tissues, and the reduction in carbon dioxide leads to a decrease in blood vessel pressure. When carbon dioxide is added, blood vessels begin to dilate, which increases blood flow and allows more oxygen to reach critical areas such as the brain and heart. From the perspective of the history of the earth, the adaptation of man to the current atmospheric composition is the result of long-term evolution of living things.

The composition of the Earth's atmosphere has undergone many stages of change, and it is now in its third generation, which is 300 million years old to date, which is far older than the history of mankind (2 million years). The first generation of the atmosphere is 4.6 billion years ago, which is equivalent to the original atmosphere, that is, the reducing gas when the earth was first formed, with hydrogen and helium accounting for 90% together; The second generation of the atmosphere was about 2 billion years ago and was dominated by volcanic gas, of which water gas accounted for 80%. In the third generation of the atmosphere, chlorophyll became oxygenated air after the formation, when the oxygen reached 1%, the organisms began to reproduce, and experienced the superoxide stage of 60% oxygen, due to the dinosaurs breeding, a large number of plants were destroyed, resulting in a decrease in oxygen content and became the current oxygen-rich stage.

Nitrogen acts as an inert diluent that regulates the solubility of oxygen in the blood and, together with carbon dioxide, controls the rate at which oxygen participates in all biochemical reactions. This is the great significance of the stability of the various components in the atmosphere.