How are syringes classified?

Syringe is a common medical instrument. As early as15th century, Italian Cartier put forward the principle of syringe. Mainly use a needle to extract or inject gas or liquid. Syringes can also be used for medical instruments and containers, such as some chromatographic scientific instruments, to inject through rubber diaphragms.

Specification and use of syringes and needles

Subcutaneous injection 1ml4.5 ~ 5.

Intramuscular injection? 2.5 ml 5.5~6

Intravenous injection and venous blood collection 2.5ml 10ml? 6.5~7

5 10 20 50ml？ 6, 7,8,9

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

22G is China's seventh needle! 30G is number 3! 28G is 3.5! 27 is number 4! 26 is 4.5! 25 is the fifth! 24 is 5.5! 23 is the 6 th! 22 is the 7 th! 2 1 is the number 8!

Each syringe with different specifications corresponds to a different needle model. I suggest you go to the hospital for examination and treatment. What is the structure and specification of the needle? Needle consists of needle tip, needle bar and needle plug (commonly used models are 4.5, 5, 5.5, 6, 6.5, 7, 8 and 9.

reference data

World Wide Web. World Wide Web [reference time 20 18-5-8]