At first, I didn't believe in this kind of magnetic therapy, because we are in the magnetic field of the earth. If we add a magnetic field around our body, it will destroy our own magnetic field. We know that humans have adapted to this earth for millions of years, including this magnetic field. If the magnetic field around our body suddenly changes, will our body adapt? But not long ago, my parents bought Midpulse far infrared (infrared magnetotherapy product) products, and said it was very good, so I was dubious. Maybe it's their psychological effect, or it's really effective. Now experts in this field have their own opinions, and it is difficult to judge who is right or wrong in a short time.
Next, I pick up a magnetic therapy principle and an expert defense to tell you.
/f？ kz=9 1293839
Principle of magnetic therapy
Magnetic therapy is a method to treat diseases by using magnetic field to act on human body. More than 2000 years ago, magnets (natural minerals of Fe3O4) were used to treat diseases in the Western Han Dynasty. In foreign countries, at the end of 16, various magnetic therapy instruments such as magnetic chairs and magnetic beds have been made for clinical use. In recent 20 years, the biological function of magnetic field has been extensively studied at home and abroad, including the treatment and diagnosis of diseases.
Magnetic therapy has the functions of analgesia, anti-inflammation, detumescence, sedation and spasmolysis, lowering blood pressure and blood lipid. Its indications are sprain and contusion, cumulative injury, traumatic hematoma, scapulohumeral periarthritis, arthritis, local reaction caused by injection and early nodules. In addition, the application of magnetic therapy instrument has a good effect on lobular hyperplasia of breast, sty, pharyngitis, gingival swelling and pain, trigeminal neuralgia and neuropathic headache.
There are many methods of magnetic therapy, and there are three commonly used methods: magnetic sheet sticking, rotating magnetic therapy and application of electromagnetic therapy machine. The bedding is inlaid with a strip-shaped magnetic stripe.
The dose of magnetic therapy includes the number of treatment sites, magnetic field intensity, area, field type, gradient, time and interval, in which the magnetic field intensity is the most important. Generally, the field strength is divided into small, medium and large. The small field strength is below 50mT (millitesla, magnetic field unit), the middle field strength is 50 ~ 150mT, and the high field strength is above 150mT. The applied field strength should depend on the conditions and can generally be based on the following principles:
(1) patients with weak health, chronic diseases, children, allergies, etc. Start with small field strength, and young and strong people can use medium or large field strength.
(2) Small or strong field strength should be used at the beginning of pathological acute diseases, and medium or large field strength can be used at the beginning of chronic diseases.
(3) The head, neck and chest should be started with small field strength, and the waist, abdomen, limbs and deep part can be started with medium or large field strength.
The time of magnetic therapy is 20 ~ 30 minutes each time, once a day or once every other day. The magnetic field intensity of magnetic therapy mattress is135 mt. As bedding, it takes more than 6 hours every day, which is equivalent to more than 10 times the treatment time of medium magnetic field intensity!
Magnetic therapy also has its contraindications: the total number of white blood cells is below 4.0× 109/L; Bleeding or bleeding tendency; People with weak or allergic constitution; Patients with organic diseases of heart, liver and lung; Pacemaker users; Pregnant women; People who are allergic to magnetic therapy. Magnetic therapy sometimes has some adverse reactions, the main symptoms are palpitation, palpitation, nausea, vomiting, fatigue, dizziness, chest tightness, leukopenia, dermatitis and so on.
In recent years, magnetic therapy has developed rapidly, and there are hundreds of manufacturers of magnetic therapy equipment. However, due to different scales, there are not many high-quality brands that consumers can buy on the market at present. The fastest-growing brands, such as Gabrielle in Zhejiang and Dream of the Future in Qingdao, have developed rapidly. Yang Guoxiong, general manager of Gabrielle, said in an interview with Health News that the development of magnetic therapy will certainly bring good news to many sub-health patients. On April 8, 2006, the fourth franchise chain was held in Beijing Haidian Exhibition Hall.
Scientific experiments have been done for a long time, but because of the low repetition rate of experimental results, it is difficult to say that there are any convincing findings.
The reporter got in touch with Zhang Xiaoyun, the first author of the paper and a professor of bioengineering at Shenzhen University.
Reporter: I am very interested in reading your paper, because I always think that magnetic therapy lacks scientific basis. After reading your paper, I know that magnetic field can cause many physiological reactions, for example, it can inhibit vomiting and significantly increase the content of nitric oxide in the body. Isn't it related to the regulation of nitric oxide content in men that Viagra can work?
Zhang Xiaoyun: Yes. Therefore, studying the mechanism of magnetic field on human body is likely to make some very important discoveries. 1983 after I came back as a visiting scholar from the United States, I thought about studying Chinese herbal medicine pharmacology, but later I found it too difficult. Even if I want to learn Chinese herbal medicine blindly, it won't take a year or so. Is it possible for me to learn all Chinese herbal medicines in my life? So I later chose the influence of magnetic field on human body.
Reporter: Do foreign scientists also study this issue?
Zhang Xiaoyun: 1900 years later, someone did it, but the experiment was difficult to do because the repetition rate was very low. The result of this experiment is different from that of the last experiment. The result of this scientist is different from that of another scientist, so it is not convincing. The research of this problem reached its climax in 1964, and scientists also published two books describing related experiments, large and small, but there was no unified view and no definition. There are also many experiments being done now.
Reporter: Do Americans believe in magnetic therapy products?
Zhang Xiaoyun: The United States refused to sell magnetic therapy bracelets to Japan. They think that if magnetic therapy products have any curative effect, it is also a psychological effect. They once asked the Japanese to produce two kinds of bracelets with the same appearance, one with magnetism and the other without magnetism, and then sold them to patients at the same time, and told them that all bracelets were magnetic therapy bracelets. It turns out that even people who wear non-magnetic bracelets will say, ah, my blood pressure has really dropped. I think magnetic therapy does have psychological factors, but it can't completely deny the role of magnetic therapy.
■ Let the vomiting mice stay in the magnetic field, then take out their intestines and brains to study the ingredients inside, and finally discover the mystery.
Reporter: Can you briefly introduce your findings after your research?
Zhang Xiaoyun: We know that one of the adverse reactions of cancer patients after chemotherapy is vomiting. We made a magnetic bed and then experimented with 150 patients. The results showed that 30% of patients who did not lie on the magnetic bed vomited seriously, 60% vomited moderately, and 10% did not vomit. However, the number of patients lying on the magnetic bed who vomited seriously decreased greatly, accounting for only 3%, and those who did not vomit rose to 18%.
So we do experiments with mice. Give it chemotherapy drugs first to make it vomit. Then put it in a magnetic field for a period of time, then kill it, take out the intestines and brain to detect the content of 5-HT, cause vomiting, and find that the content in the brain is obviously reduced.
Nitric oxide is related to information transmission in the nervous system. After we found that the magnetic field can affect the content of nitric oxide, I suddenly understood a question, why the repetition rate of experimental results made by scientists in the past is very low, because the content of nitric oxide in human body is constantly changing, which will lead to the instability of experimental results. We used two synchronous cells to do experiments, which avoided this influence, and the experimental results were consistent.
■ Many magnetotherapy products on the market have small magnetic field strength and no harm, but at the same time they are not beneficial.
Reporter: So how do you evaluate the magnetic therapy products on the market now?
Zhang Xiaoyun: I think many magnetotherapy products are harmless to human body because of their low magnetic field intensity, but they are certainly not good. The purpose of our research is to know exactly what kind of effect magnetic field can have on human body, so as to tell exactly what kind of effect magnetic therapy products will have in the future.
Reporter: Are magnetotherapy products controversial in academic circles?
Zhang Xiaoyun: This is really controversial. There are many opponents. For example, if you ask a doctor in a hospital, 9 out of 10 people think that magnetic therapy is a quack trick. I don't agree with this view. Magnetic therapy has existed in China for more than 1000 years, which should have its reasons. Our job is to study the principle clearly from the cellular level, and then make people believe it from the molecular level.
Excerpt from Beijing Youth Daily