Oxygen is necessary for human survival, so how much oxygen is normal for that person to have in the

As far as I know, the oxygen concentration is between the extremes, and people are able to live a normal life.

Oxygen is necessary to sustain human life, and many diseases can lead to hypoxia, chronic obstructive pulmonary disease.

and other respiratory diseases can cause this problem. Oxygen therapy is hypoxemia.

One of the most important clinical approaches. Oxygen is an important and special "medicine".

Oxygen therapy for chronic obstructive pulmonary disease.

What does it mean to be a patient? <>

A: Long-term oxygen therapy (LTOT) is an effective means to delay the progression of patients with chronic obstructive pulmonary disease (COPD) and enable patients to reintegrate into society or family after discharge. Long-term home oxygen therapy can correct hypoxemia, reduce the decline of lung function, reduce pulmonary artery pressure, prolong the survival of COPD patients, and reduce the number of hospitalizations; May reduce dyspnea in inactive settings.

Improves post-activity shortness of breath, increases range of daily activities, improves sleep, cognition, mental and mental state.

What is the specific concept of long-term oxygen therapy? <>

A: Long-term oxygen therapy refers to the long-term administration of oxygen every day for at least 6 months; Standard long-term oxygen therapy requires patients to continuously inhale low-flow, low-concentration oxygen 24 hours a day, but this is not currently possible in practice, so oxygen should be inhaled for at least 15 hours a day.

Its purpose is to make the arterial partial pressure of oxygen (PAO2) reach 60 mm Hg (mmHg), maintain the arterial oxygen saturation (SAO2) of 90%, increase the arterial oxygen saturation, improve the hypoxic state, and prevent and reverse tissue damage and organ dysfunction caused by hypoxia. It can relieve dyspnea and prolong the survival time of chronic hypoxia.

When is long-term oxygen appropriate**? <>

A: Patients with stable COPD present with hypoxemia at rest, i.e., arterial partial pressure of oxygen (PAO2) less than 55 mmHg or arterial oxygen saturation (SAO2) less than 88% when breathing room air. This is the main indication for long-term oxygen therapy.

Long-term oxygen therapy should also be given if the above criteria are not met: Secondary polycythemia, i.e., hematocrit.

55%；Pulmonary heart disease.

Pulmonary hypertension.

The normal amount of oxygen in the air is that below this range will cause breathing difficulties, and above this range value belongs to an oxygen-rich environment, that is, too much oxygen will also affect the body.

Oxygen is an essential thing for the human body, but excessive ingestion can lead to oxygen poisoning, and in severe cases, it can lead to death, and the amount of oxygen is two percent of the air.

The amount of oxygen in the air is normal, and if the oxygen concentration is too high, it will be poisoned.

Industrial oxygen production. 1. Air refrigeration separation method.

The main components in the air are oxygen and nitrogen. The preparation of oxygen from the air by using the different boiling points of oxygen and nitrogen is called air separation method. First, the air is pre-cooled and purified (removing a small amount of moisture, carbon dioxide, acetylene, hydrocarbons and other gases and impurities such as dust from the air), and then compressed and cooled to make it liquid air.

Then, using the difference in the boiling points of oxygen and nitrogen, the liquid air is evaporated and condensed many times in the distillation column to separate the oxygen and nitrogen to obtain pure oxygen (99 6% purity) and pure nitrogen (99 9% purity).If some additional devices are added, argon, neon, helium, krypton, xenon and other rare noble gases with very little content in the air can also be extracted. The oxygen produced by the air separation unit is compressed by the compressor, and finally the compressed oxygen is loaded into high-pressure cylinders for storage, or directly transported to the factory and workshop through the pipeline.

The use of this method to produce oxygen, although it requires large-scale complete sets of equipment and strict safety operation technology, but the output is high, can produce several dry, 10,000 cubic meters of oxygen per hour, and the raw materials consumed are only no need to buy, do not transport, do not need to store the air in the warehouse, so since the development of the first cryogenic air separation oxygen generator in 1903, this oxygen production method has been the most widely used.

2. Molecular sieve oxygen production method (adsorption method).

Taking advantage of the fact that nitrogen molecules are larger than oxygen molecules, special molecular sieves are used to separate oxygen from the air. First of all, the compressor is used to force the dry air to enter the adsorber of the vacuum through the molecular sieve, the nitrogen molecules in the air are adsorbed by the molecular sieve, and the oxygen enters the adsorbber, and when the oxygen in the adsorber reaches a certain amount (the pressure reaches a certain level), the oxygen valve can be opened to release the oxygen. After a period of time, the nitrogen adsorbed by the molecular sieve gradually increases, the adsorption capacity is weakened, and the purity of the oxygen produced decreases.

This method of producing oxygen is also known as adsorption. Recently, small oxygen concentrators using adsorption oxygen production have been developed to make them easy to use at home.

3. Electrolytic oxygen production method.

Water is placed in an electrolyzer, sodium hydroxide or potassium hydroxide is added to increase the electrolysis of the water, and then direct current is applied to decompose the water into oxygen and hydrogen. For every cubic meter of oxygen produced, two cubic meters of hydrogen are obtained at the same time. It takes 12-15 kWh to extract one cubic meter of oxygen by electrolysis, which is very uneconomical compared to the power consumption of the above two methods (0 55-0 60 kWh).

Therefore, the electrolysis method is not suitable for large amounts of oxygen. In addition, if the hydrogen produced at the same time is not properly collected, it will accumulate in the air, such as mixing with oxygen, and it is prone to extremely violent**. Therefore, the electrolysis method is not suitable for the method of household oxygen production.

What is the approximate amount of oxygen in the air? As follows:In the air, oxygen accounts for about 21%.

Oxygen (oxygen), chemical formula O2. Chemical formula: colorless and odorless gas, the most common elemental form of oxygen. Melting point, boiling point -183 .

It is not easy to dissolve in water, and about 30ml of oxygen is dissolved in 1L of water. In the air, oxygen accounts for about 21%. Liquid oxygen is sky blue. Oxygenation is a blue crystal.

It is not very active at room temperature, and it is not easy to interact with many substances. However, it is very active at high temperatures and can be directly combined with a variety of elements, which is related to the electronegativity of oxygen atoms second only to fluorine.

Is more oxygen better for humans? What are the effects of high concentrations of oxygen on people? 60% partial pressure of oxygen.

It can rely on the oxidation of free radicals to kill cells, gradually leading to cell aging, pigmentation, arteriosclerosis, and liver function.

Impairment, decreased brain function. Pulmonary edema can occur over time.

Internal bleeding and eventually death due to lack of oxygen to the organs.

At 100% partial pressure of oxygen, most people die of hypoxia within 24 hours, which is very ironic. Pure oxygen is combined with more than 1 atmosphere.

can destroy brain cells within hours to minutes, causing mental disorders.

Until death. Until then, at 40% partial pressure of oxygen, fires caused by various natural heat sources and man-made fires could burn many people to death and seriously disrupt social order, causing a powerful and destructive chain reaction.

If a large amount of pure oxygen is injected into the atmosphere to increase the oxygen concentration without pumping out other gases such as nitrogen, the air pressure itself increases. Large-scale nitrogen extraction can significantly affect atmospheric circulation. A device capable of performing such an operation on a global scale does not need to change the composition of the gas at all, and the strong winds that accelerate the air can flatten humans.

Summary: Young people dream well, don't think about what you have or don't, "I long for you like I want to breathe".

This sentence uses an extremely exaggerated rhetorical device.

The extremely unreliable rhetoric illustrates the fact that oxygen is very important to people. In the high-altitude areas where oxygen is scarce, if a high reaction occurs, it can lead to death. Therefore, at first glance, it seems that the more oxygen intake, the better, but this is not the case, people who inhale high concentrations of oxygen for a long time will indeed be "smoked" by oxygen!

High concentrations of oxygen into the body will produce a large number of oxygen free radicals, oxygen free radicals are extremely active, flowing everywhere in the body, attacking and killing various cells, and the various harms caused by this process are collectively called oxygen poisoning.

Specific manifestations include pulmonary edema, pulmonary stasis and hemorrhage. If a person is placed in a pure oxygen environment with a pressure of 1 atmosphere, pneumonia will quickly develop in the person.

Eventually, he suffered from respiratory failure and suffocation, with a survival time of less than 24 hours.

In fact, excessive oxygen intake can cause mental decline, memory loss, and promote life aging, so if you take too much oxygen, you will die quickly.

I think for human beings, the more oxygen the better, and I think that high concentration of oxygen will have a lot of effects on people, because it will affect people's lives, and it will also affect people's normal breathing, and it will also affect people's normal life, and if the situation is very serious, it will also make people suffocate.

For humans, more oxygen is not always better. High concentrations of oxygen can have a big impact on people and may cause poor breathing in humans. will cause the human environment to be affected.

Affects the respiratory system in humans. Affect human work and rest habits. Let the body's immunity decrease.

Not really. High concentrations of oxygen can also cause poisoning in people, it can also lead to death, it can also cause harm to the human body, and it can also lead to stunted development of the human body.

The oxygen concentration is between the extremes and the person is able to live a normal life.

Oxygen is the most widely distributed in nature, covering the mass of the crust, and is the most abundant element. Oxygen is needed for the oxidation of hydrocarbons, the treatment of wastewater, rocket propellants, and the respiration of animals and humans in aviation, aerospace and diving. Animal respiration, combustion, and all oxidation processes, including the decay of organic matter, consume oxygen.

But the oxygen in the air is constantly replenished by the photosynthesis of plants. In the cutting and welding of metal. It is the mixing of pure oxygen with combustible gas (such as acetylene) to produce a flame at extremely high temperatures, which melts the metal. Metallurgical processes are inseparable from oxygen.

The oxygen concentration is between the extremes and the person is able to live a normal life.

Effect of oxygen concentration (% volume) on the human body: it can be fatal within 6 minutes (absolutely confined environment); , 4 can be cured within 5 minutes (absolutely closed environment);

3. Greater than, belonging to the oxygen-rich environment;

4. Normal oxygen concentration (normal oxygen content in the air);

5. The human body can withstand the minimum concentration of oxygen;

19%, the person's work efficiency will be reduced, and it can lead to head, lung and circulatory problems for a long time;

12%, which will produce symptoms of shortness of breath, loss of judgment, and purple lips;

10%, loss of intelligence, fainting, unconsciousness, paleness, purple lips, nausea and vomiting will occur;

8%, 8 minutes can be fatal;

6%, convulsions within 40 seconds, respiratory arrest, death.

The normal human body only needs a certain concentration of oxygen, and too low or too high a concentration of oxygen is harmful to people. At normal pressure, when the oxygen concentration is 14 16 (equivalent to the partial pressure of oxygen), there will be a deepening of breathing, a rapid pulse, an increase in blood pressure, and a decrease in muscle coordination of the limbs. When the oxygen concentration is 10 14, fatigue and weakness, lack of concentration, slow reaction, and disordered thinking appear.

At an oxygen concentration of 6 10, dizziness, headache, nausea, vomiting, hazy consciousness, and cyanosis appear. When the oxygen concentration is below 6, blood pressure drops, breathing stops, pulse is weak, convulsions occur, pupils dilate, and then the heart beats and breathing stops and dies. Adverse results can also occur when the concentration of oxygen is too high.

Oxygen toxicity may occur when the oxygen concentration exceeds 40, and when the oxygen concentration is 40 60 is inhaled, the symptoms of pulmonary oxygen toxicity are mainly present. Cough is mild at first, slightly uncomfortable behind the sternum, followed by chest tightness, burning sensation behind the sternum, and difficulty breathing, and the cough worsens. In severe cases, pulmonary edema and even respiratory distress syndrome can occur.

When oxygen is inhaled at concentrations above 80, symptoms of neurological oxygen toxicity are predominantly present. Lips and facial muscle twitching at first, pallor, dizziness, tachycardia, prostration, followed by generalized tonic epileptic convulsions, coma, and death due to respiratory exhaustion. It is important to note that long-term exposure to an oxygen concentration of 40 or higher may cause eye damage and in severe cases, blindness.

Air pollution does not cause oxygen concentrations to decrease, but the concentration of harmful gases in the atmosphere increases, and the oxygen concentration in the atmosphere is about 21%.

100% - fatal for 6 minutes.

50%--Fatal 4 5 minutes can be cured.

Oxygen-rich, with a strong ** danger.

Oxygen concentration is normal.

Minimum permissible concentration of oxygen.

15 19 percent -- reduces work efficiency and can cause problems with the head, lungs, and circulatory system10 12 -- shortness of breath, loss of judgment, purple lips8 10 percent -- loss of intelligence, fainting, unconsciousness, paleness, purple lips, nausea and vomiting 6 8 percent -- 8 minutes.

4 6%--40 seconds of convulsions, respiratory arrest, death.

Oxygen concentration (% volume) - Indication (at atmospheric pressure) 100% - Fatal 6 minutes;

50%--Fatal 4 5 minutes can be cured.

Oxygen-rich, with a strong ** danger.

Oxygen concentration is normal.

Minimum permissible concentration of oxygen.

15 19 percent -- reduces work efficiency and can cause problems with the head, lungs, and circulatory system10 12 -- shortness of breath, loss of judgment, purple lips8 10 percent -- loss of intelligence, fainting, unconsciousness, paleness, purple lips, nausea and vomiting 6 8 percent -- 8 minutes.

4 Convulsions within 6%--40 seconds, respiratory arrest, death---** Xiaofeng Building Technology.