The syringe consists of a syringe barrel with a small hole at the front end and a matching piston core rod. Syringes are used to inject small amounts of liquid or gas into or out of areas that are not accessible by other methods. When the rod is pulled out, the liquid or gas is drawn through the small hole at the front of the syringe, and the liquid or gas is squeezed out when the rod is pushed in. The process of extracting or injecting gas or liquid with a syringe and needle is called injection.
There are many types of masks on the market, and the wearing methods of different types of dust masks are different, and mastering the correct wearing of masks can more effectively prevent the harm of fine particles such as dust to the human respiratory tract. Regardless of the price of the mask purchased, if the wearing method is incorrect, it will affect the use of dust masks.
1. Some syringes have a spiral mouth design and a double-threaded fixed needle. 2. In order to better use the post-destruction treatment, the existing self-destruct syringe, after use, by retracting the needle, jamming the core rod or automatically breaking the core rod so that the syringe can not be used again. 3. Made of polypropylene material, good biocompatibility. 4. High transparency, clear and accurate tick marks. 5. Good sliding performance. 6. The product is designed with anti-slip structure, which is convenient for users to use. 7. The core rod is designed with a self-destruct structure, which is convenient for harmless treatment after one-time use.
The BAI structure of ordinary syringes generally contains: nipples, empty cylinders (including graduated DAO lines), pistons, piston shafts, and zhuan piston shanks. shu The structure of the needle is: needle tip, needle stem, needle plug. The disposable syringe is divided into three-piece and two-piece type, the three-piece structure is composed of core rod, rubber stopper, jacket three pieces and injection needle and outer packaging, and the two-piece structure is composed of core rod, jacket and injection needle, outer packaging.
The specifications and models of syringes and needles are as follows: Subcutaneous injection 1ml 4.5~5, intramuscular injection 2.5ml 5.5~6, intravenous pulse injection, intravenous blood sampling 2.5ml 10ml 6.5~7, Note: The thickness of the needle is indicated by several numbers, generally there are 4.5, 5, 6, 7, etc., 7 is the diameter of the needle is 0.7 mm (may be the outer diameter) generally children use 4.5 or 5, adults use 7. The needle is a hollow metal needle that can be freely loaded and unloaded at the end of the syringe head, for safety and hygiene, disposable needles should be discarded after use and should not be reused. Syringe barrels can be made of plastic or glass, and usually have a scale indication indicating the volume of liquid in the syringe. Glass syringes can be sterilized with autoclaves, but because plastic syringes are less expensive to handle, most modern medical syringes are made of plastic, which further reduces the risk of bloodborne diseases. Among drug users who inject intravenous drugs, the spread of the disease, especially HIV and hepatitis, is associated with the reuse of needles and syringes.
According to the "Twelfth Five-Year Plan for Medical Device Science and Technology Industry", it will focus on supporting 10~15 large-scale medical equipment enterprise groups, supporting 40~50 innovative high-tech enterprises, establishing 8~10 medical device science and technology industry bases and 10 national innovative medical device product demonstration application bases, improving the industrial chain, optimizing the industrial structure, increasing market share, and significantly enhancing the international competitiveness of the medical device industry. It is estimated that the output value of new medical devices brought about by scientific and technological progress and demonstration applications will be 200 billion yuan, and the proportion of exports to the total international market will increase to more than 5%.
At present, the world is experiencing the peak of the fourth wave of the new crown epidemic, and insisting on scientific wearing of masks is still one of the most effective ways to prevent and control the epidemic. Many parents find that it is difficult to put on masks for their children, and they finally put them on, and their children can't last long, and they always want to take them off.
When in crowded indoor places such as shopping malls, supermarkets, movie theaters, venues, exhibition halls, airports, docks, and common areas of hotels. When using van elevators and public transportation such as planes, trains, ships, long-distance buses, subways, and buses. When you are in an outdoor place such as a crowded open-air plaza, theater, park, etc. When visiting or accompanying the hospital, undergoing health examinations such as temperature checks, checking health codes, and registering travel information. When symptoms such as nasopharyngeal discomfort, cough, sneezing, and fever occur. When the restaurant or cafeteria is not eating.
Hazards of used masks As the little friend said, used masks may indeed carry a large number of microorganisms, such as viruses, oral bacteria, etc. These microorganisms may not only originate from the outside world, through inhalation, adsorbed on the outer surface of the mask, but also because the user itself carries bacteria, viruses, through exhalation, adsorbed on the inner surface of the mask. Therefore, used masks may have a high risk of infection.
Over the past 2 years, the new crown epidemic has been repeated, masks have become the "standard" for people to travel, and many people have also developed the habit of hoarding masks. However, don't overlook one thing: masks also have a shelf life! Thousands of masks hoarded, one is inattentive expired, it's a pity to throw it away, but can you still wear it? How to store masks better? NetEase Health consulted SGS Textile and Footwear Services Personal Protective Equipment Technical Engineer Yang Ran, answer the common misunderstandings of hoarding masks for you!