When infusion, is the air input blood vessels rescued?

Source: Science Popularization China

Picture source: Qian Tuwang.com

When infusion, is the air input blood vessels rescued?

First answer a question. When a hanging bottle is finished, will the air be injected into the blood vessels?

Professional data show that the standard atmospheric pressure is about 760mmHg (mm Hg), and the standard blood pressure is about 100mmHg. Do you have a breath of air -conditioning? But in fact ... 100mmHg means that the standard blood pressure is 100mmHg higher than the atmosphere. So even if the hanging bottle is empty, the air cannot enter the blood vessels. You only need to worry about the "automatic blood donation" caused by blood return ...

So, will the infusion be lost in the air?

Before the infusion, the nurse will play a needle tube normally. This bouncing action is to empty the air in the pinhole.

In the infusion, in order to prevent the air from entering the vascular road, the magical existence of Mohhy's tube is set up on the infusion device. Its role is to leave a certain amount of liquid to form a liquid plane to prevent air from entering the pipeline.

Therefore, in general, unless the human beings are pinching the infusion bottle, the hanging water does not injected the air into the body.

For normal people, a small amount of air entering blood vessels does not cause discomfort. Only when a large amount of air is injected into the blood vessels can it cause air embolism. If the dose is injected too much, it will cause sudden death.

However, we can't leave the dose to talk about the consequences. The dose of air embolism here is at least 50ml of air. The biggest in common medical syringes is the 50ml syringe for patients with venous injection for patients.

Therefore, it is rare to be called air embolism. For normal people, in general, we really don't have to worry about infusion or injection into the air.

Author: Tang Qin

Source: China Science and Technology Publishing House WeChat public account

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