How much air is ingested in a vein can be fatal

100ml。But this is only a theoretical value in the textbook, it is a statistical result, and the test is easy to use, but it is not an accurate value in practice.

The consequences of the entry of air into the blood circulation depend on the speed of entry and the amount of gas. A small amount of gas enters the bloodstream and can be dissolved into the blood, and no gas embolism occurs. If a large amount of gas (100ml in the general textbook) quickly enters the vein, it flows with the blood to the right heart, and the air and blood are stirred to form a large number of bubbles due to the heart beat, so that the blood becomes a compressible foam and fills the heart chambers, which hinders the return of venous blood and the output to the pulmonary artery, causing serious circulatory disorders.

Patients may present with dyspnea, cyanosis, and sudden death. Some of the bubbles that enter the right heart can enter the pulmonary arteries and block the small pulmonary artery branches, causing gas embolism in the pulmonary arteries. Small bubbles can also pass through small branches and capillaries of the pulmonary arteries to the left side of the heart, causing embolism in some organs of the systemic circulation.

Generally, it will not affect life within 5 ml, and more than 5 ml will be life-threatening, but it depends on your own physical condition!

This problem depends on the speed and location of the air intake, the lethal amount of gas entering the circulatory system is 60-150ml, it is also said that 100-150ml, the lethal amount of air embolism in the arterial system such as coronary arteries and cerebral arteries is smaller, and the elderly and frail and young children can die due to a small amount of air embolism. The lethal dose of continuous entry of microbubbles in intravenous infusion is 2 ml (kg·min).

Don't do anything bad.

Don't do bad things! Very horrible question!

Large amounts of air entering blood vessels can cause air embolism. If it hits in the muscles, there is generally no problem.

1 The concept of air embolism: air embolism is a phenomenon caused by air entering the veins of the body and reaching the heart during the process of infusion or blood transfusion, as well as under human factors, causing blood circulation disorders. If the amount of air entering is small, it will not cause much harm; If the amount of air entering is large, it will cause severe hypoxia in the body, resulting in serious consequences of immediate death.

2 The process of air embolism: After the air enters the vein, it is first carried to the right atrium and then to the right ventricle along the veins. If the amount of air is low, it is pressed into the pulmonary artery by the right ventricle, dispersed into the pulmonary arterioles, and finally into the capillaries, so the damage is small; If the amount of air is large, with the beating of the heart, the air and blood are mixed into foam, and circulate to the whole body with the blood, such as entering the pulmonary artery, its branches can be blocked, so that the blood can not enter the lungs, causing severe hypoxia and causing death; If it enters the coronary arteries of the heart, it can block the coronary circulation, cause severe cardiac dysfunction, and cause death.

3. Factors causing air embolism: mainly caused by air entering the veins of the body when the air is not exhausted during infusion or blood transfusion, the rubber tube connection is not tight and there is a leaking seam, pressurized infusion or no one is guarding the side. Generally, it will not cause great harm to the human body, because cats need to inject 20 40 ml of air to cause embolism and death, dogs need about 80 150 ml of air, and people need more.

However, it can cause blood circulation disorders in local organs, resulting in hypoxia and abnormal function of local organs.

Air entering blood vessels can cause gas embolism, depending on the amount of gas entered. If the amount of air is small, it can be dispersed into the alveolar capillaries and bind to hemoglobin. or diffuse into the alveoli and excrete with respiration without causing damage.

However, if the amount of air entering is large and relatively rapid, due to the beating of the heart, the air and the blood in the heart chambers are stirred to form a large amount of foam, and when the heart is contracted, it is not expelled or the pulmonary artery is blocked, which can lead to sudden death.

Generally, when the air that quickly enters the blood circulation is about 100 ml, it can lead to heart failure, which is manifested as abnormal discomfort in the chest, followed by dyspnea and cyanosis, at which time immediate rescue should be organized.

Because the viscosity of blood is relatively high. Sometimes you can see air bubbles in the water pipes blocking the movement of water, and the same is true in the blood. Normally, small air bubbles can be expelled in the lungs, but as you said, large doses of air can form fatal blood clots.

If it's less, it's not a big deal.

If there is too much, the pulmonary orifice will be blocked in the right ventricle. Preventing blood from entering the lungs can cause severe hypoxia. Or even death.

I really want to try it, I heard that at least 50ml, the ordinary syringe is only 20ml, it is said that someone got 8 tubes or wood is dead, so this thing is not too reliable, now Hong Kong and Taiwan are more popular charcoal burning, it is said to be safe**.