Syringe, needle specifications and models are as follows:
Subcutaneous injection 1ml 4.5 ~ 5, intramuscular injection 2.5ml 5.5 ~ 6, intravenous injection, intravenous blood collection 2.5ml 10ml 6.5 ~ 7,
Instructions: the thickness of the needle with a number of numbers to indicate that there are generally 4.5, 5, 6, 7 and so on, the No. 7 is that the diameter of the needle for the 0.7 millimeters (may be the outer diameter) generally children with 4.5 or 5, adults with 7.
Needles are hollow metal needles that can be freely loaded and unloaded at the head end of the syringe. For safety and hygiene reasons, disposable needles should be discarded after use and not reused.
Syringe barrels can be made of either plastic or glass, and usually have a graduated scale indicating the volume of liquid in the syringe.
Glass syringes can be sterilized in an autoclave, but because plastic syringes are cheaper to dispose of, most modern medical syringes are made of plastic, which further reduces the risk of blood-borne diseases.
Transmission of disease among intravenous drug users, especially HIV and hepatitis, has been linked to the reuse of needles and syringes.
Expanded:
A new type of syringe developed in Japan does not use needles but relies on bubble pressure to inject, delivering drugs to the target with high precision by simply holding the syringe close to the skin without pain.
Needle-free syringes also exist on the market today, and they typically rely on the force of a spring to generate high pressure to fire a liquid that penetrates the skin and delivers the drug to the muscle, but with the risk of damaging nerves and more or less pain.
The newly developed needleless syringe, which is about 10 centimeters long, was developed by a team of researchers led by Yoko Nishiyama, an associate professor at Shibaura Institute of Technology, and uses a voltage applied to the liquid to fire bubbles at high speeds, and uses the force of the bubbles' rupture to make microscopic holes in the cells, through which the tiny bubbles containing the drug are then injected into the cell interior. Only the drug reaches the affected area after the bubble's gas contracts.
Because the direction is so clear, the new injector can target the local area with high precision, and because the holes made are only about 4 microns, there is little damage to the cells.
The needleless syringe has a wide range of applications, from injecting drugs to implanting genes into cells, including plant cells, and carrying out therapies.
The research team intends to further improve the structure of the syringe, conduct a more detailed evaluation of the amount of medicine that can be injected and the depth of the perforation, and collaborate with companies to bring the new syringe to a practical level as soon as possible.
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