Air purifiers and health sciences: do you have data?
The hottest gift you’ve ever given is “They can really provide the rampant indoor air purifiers in China since last year. Sales have soared. Maybe it’s the moon cakes and red envelopes. When’s the Chinese New Year?” According to records, independent testing, including mines, a large number of good air purifiers can significantly improve your indoor PM2.58% and sell inventory after highly publicized air crisis trio. I think this is a good chance. But is there really any good data to prove that you are healthy? Of course, it seems logical to reduce exposure to pollution and harmful health effects. However, the medical history was later filled with common sense and traditional stories, such as venotomy, or more modern multivitamin traditions. A large proportion of people read this article, assuming that it is “healthy, multivitamin daily – seemingly useless or harmful, but the best evidence suggests that they are worthless and possibly worthless.” Harm.
In theory, in the test, good clean water should increase the indoor pollution level by more than 80%. The percentage used by private associations of consumer electronics manufacturers (AHAM) in their Clean Air Transport Rate (CADR) tests has decreased by 80% and is widely cited in comparison charts of air purifiers. Well, let’s say you feel very safe and comfortable and have a top-level cleaner installed in your living room. But how much time does the filter actually have? How about – maybe only 20 minutes of laboratory testing, cleaning is too small for room size, or filters are old, or fans are too slow, or Windows is usually cited as CADR testing open in the real world? I hope this conversation goes a step further, asking for evidence that your health will improve when you use these machines. I hope to be able to convey to my patients and readers the published studies that followed a large number of people, but even months or years later, they conducted air purification studies and measured their health in comparison to the control group that did not use the machine to determine heart and lung diseases, cancer and mortality. Are there any improvements? Are you?
I searched PubMed’s scientific database to find the best research, and I wasn’t surprised, because I was disappointed, but I found very little data. These well-designed research projects are very difficult and expensive. However, there are some attempts, especially research search, but the results are very small, and there are great differences between these studies, making it difficult for A to assess children with asthma when used with HEPA filters, found that air filters help improve asthma symptoms, and carried out a systematic evaluation in 2002. Published in Pediatrics in 2011, a recently updated well-designed study was also exposed to passive smoking at home by 200 children with asthma. I gave it half of the real HEPA purifier for children and half of the fake purifier for bedrooms. Year after year, the children’s HEPA group may reduce the number of visits by doctors to asthma attacks, but not decisively – the PM2-0.5 decrease in their families by 25%.
Other studies focused on allergies, including an interesting 2008 study that assessed children with over-recorded pet allergies, recorded lung function and blood markers, once a year. Years later, there was no significant difference in the use of allergic drugs or blood markers in the lungs among those using HEPA air purifiers. Another study in 1990 showed a 70% reduction in indoor PM 0.3 and an even more impressive improvement in allergic symptoms.
All these tips on health benefits still revolve around what I want to know about dancing on the edge of China and the developing world. In the United States, most air cleaners are marketed and tested for allergies and asthma. But in developing countries, air pollution is much more serious, so health risks are much more serious. We are concerned about the long-term risk of death, heart and lung diseases, and cancer contamination. These studies I mentioned do not answer the deeper question: Can long-term use of indoor air purifiers prevent death, heart and lung diseases, and cancer?