What is the needle model corresponding to each syringe specification?

The specifications and models of syringes and needles are as follows:

Subcutaneous injection 1ml 4.5~5 ~ 5, intramuscular injection 2.5ml 5 ~ 6, intravenous injection and venous blood collection 2.5ml 10ml 6.5 ~ 7,

Note: the thickness of the needle is indicated by numbers, generally 4.5, 5, 6, 7, etc. No.7 indicates that the needle diameter is 0.7 mm (approximately the outer diameter). Generally, children use size 4.5 or 5 and adults use size 7. ..

Needle is a kind of hollow metal needle, which can be assembled and disassembled freely at the head end of syringe. For safety and hygiene, disposable needles should be discarded after use and cannot be reused.

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.

Extended data:

A new type of syringe developed in Japan uses bubble pressure instead of needle for injection. Just press the syringe close to the skin, and the drug can be delivered to the target with high precision without pain.

There are needle-free syringes on the market at present. They usually rely on the force of the spring to generate high pressure to spray liquid, penetrate the skin and then send the medicine to the muscles, but it may damage the nerves and there will still be some pain.

The needle-free syringe newly developed by the research team led by associate professor Yoko Shanxi of Zhipu University of Technology is about 10cm in length. It emits bubbles at high speed by applying voltage to the liquid, opens tiny holes in cells by using the force of bubble rupture, and then injects tiny bubbles containing drugs into cells through the holes. After the gas in the bubble contracts, only the drug reaches the affected area.

Because of its clear direction, the new syringe can treat the local area with high precision, and because the hole is only about 4 microns, it does little harm to cells.

This needle-free syringe can not only inject drugs, but also implant genes into cells including plant cells for treatment, which is widely used.

The research team is going to further improve the structure of the syringe, make a more detailed evaluation of the injectable dosage and perforation depth, and cooperate with enterprises to make the new syringe practical as soon as possible.

References:

People's Network-A new syringe can be injected without a needle.