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Syringes are often attached to a hypodermic needle for injecting or withdrawing fluid or gas into body tissue. They can also be used in medical devices, containers, scientific instruments such as some chromatography, to inject through a rubber diaphragm. Injecting gas into a blood vessel will result in air embolism. The way to remove air from the syringe to avoid embolization is to invert the syringe, tap it lightly, and then squeeze a little liquid before injecting it into the bloodstream. In some cases where accuracy is not the primary consideration of germs, such as quantitative chemical analysis, the glass syringe is still used because of the small error and the smooth movement of the push rod. It is also possible to inject some juice into the meat with a syringe to improve the taste and texture when cooking meat, or to infuse it into the pastry during baking. The syringe can also fill the ink into the cartridge. Shanghai Gaoge Industry & Trade Co., Ltd.
Syringe type specifications generally use 2 ml, 5 ml, 10 ml or 20 ml syringes, occasionally 50 ml or 100 ml, and intradermal injection with 1 ml syringe. The syringe barrel can be either plastic or glass and typically has a scale indication of the volume of liquid in the syringe. Glass syringes can be sterilized with autoclaves, but because modern syringes are less expensive to process, modern medical syringes are mostly made of plastic, which further reduces the risk of blood-borne diseases. The spread of disease among drug users who are intravenously drug-injected, especially the spread of HIV and hepatitis, is associated with repeated use of needles and syringes.