The appearance of syringe is an epoch-making revolution in the field of medical devices. The process of extracting or injecting gas or liquid with a needle is called injection.
The syringe consists of a needle cylinder with a small hole at the front end and a piston core rod matched with it, which is used to inject a small amount of liquid or IT into or extract from areas that cannot be reached by other methods. When the mandrel is pulled out, the liquid or gas is sucked out from the small hole at the front end of the syringe, and when the mandrel is pushed in, the liquid or gas is squeezed out.
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Model setting
Generally, 2 ml, 5 ml, 10 ml or 20 ml syringes are used, occasionally 50 ml or 100 ml syringes are used, and 1 ml syringes are used for intradermal injection.
The syringe barrel can be made of plastic or glass, and usually it has a scale indicating the volume of liquid in the syringe. Glass syringes can be sterilized by autoclave, but because of the low cost of plastic syringes, most modern medical syringes are made of plastic, which further reduces the risk of blood-borne diseases. The spread of diseases, especially HIV and hepatitis among intravenous drug users is related to the reuse of needles and syringes.
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