What Are the Different Types of Ultrasonic Applications?

Ultrasonic wave is a sound wave with a frequency higher than 20000 Hz . It has good directivity, strong penetrating ability, easy to obtain more concentrated sound energy, and can travel a long distance in water. , Sterilization and so on. There are many applications in medicine, military, industry, and agriculture. Ultrasound is named because its lower frequency limit is greater than the upper human hearing limit.

Sound waves are objects

Two main parameters of ultrasound:

Frequency: F20KHz (In practical applications, sound waves with F15KHz are also commonly referred to as ultrasound because of similar effects);

Ultrasound effect: When ultrasonic wave propagates in the medium, the interaction between the ultrasonic wave and the medium causes the medium to undergo physical and chemical changes, thereby generating a series of mechanical, thermal, electromagnetic and chemical ultrasonic effects, including 4 effects:

Mechanical effect. The mechanical action of ultrasonic waves can promote the emulsification of liquids, the liquefaction of gels, and the dispersion of solids. When a standing wave is formed in the ultrasonic fluid medium, the small particles suspended in the fluid are condensed at the nodes due to the mechanical force, and a periodic accumulation is formed in the space. Ultrasound

The ultrasonic effect has been widely used in practice, mainly in the following aspects:

1) When the ultrasonic wave is transmitted, the directivity is strong and the energy is easy to concentrate.

2) Ultrasonic waves can propagate in a variety of media and can travel long enough.

3) The interaction between the ultrasound and the sound medium is moderate, and it is easy to carry information about the state of the sound medium to diagnose or produce effects and treatment on the sound medium.

4) Ultrasonic waves can be effectively transmitted in gas, liquid, solid, solid-melt and other media.

5) Ultrasonic waves can transmit strong energy.

6) Ultrasonic waves can cause reflection, interference, superposition and resonance.

Ultrasound is a wave form, which can be used as a carrier or medium for detection and load information, such as B-ultrasound. It is also an energy form. When its intensity exceeds a certain value, it can pass through and propagate ultrasound. The interaction of the media, to influence, change so as to destroy the state, nature and structure of the latter is used for therapy.

1. Soft and firm fat removal for acne:

There are many types of acne. The most common ones are purulent and acne. However, there are some types of acne that are large, red, swollen, hard, and painful to touch. Improper treatment often results in hard scars. When encountering such patients, it is best not to puncture the squeeze in the early stage. Apply an ultrasonic beauty machine and acne anti-inflammatory cream, and gently massage on the surface of the sore. Massage each sore for about 1 minute. Ultrasound can impact lymph nodes, accelerate the circulation and dissipation of the accumulated blood and lymph fluid, inflammatory cells change shape under the action of ultrasound, plus ultrasound to introduce anti-inflammatory drugs, the congestion of swollen acne is improved, and the induration of the skin gradually softens.

2. Eliminate scars (nodules) after acne healing

During the growth of acne, many patients due to excessive squeezing and improper treatment when inflamed, broken micro blood vessels, the blood leaked out of the skin, showing a "red mark", and some people use anti-inflammatory creams to stimulate the skin Pigmentation, leaving a "coffee print" after healing, and ultrasonic waves can penetrate the skin, not only can dissolve and penetrate the dry blood of the skin, but also strengthen blood circulation and metabolism, activate cells, accelerate absorption, and make the color print fade away faster. If the acne and purulent is extruded or the local tissue is damaged excessively, the local tissue cells cannot be properly metabolized and the blood vessels ruptured and exuded will be coagulated without proper treatment after bacterial infection and death, resulting in nodule lumps after healing, such nodules Lumps, generally if the scar cream or scar oil is applied, it will take 15-45 days to gradually soften and fade the pigment. If you use ultrasound with the corresponding drugs, it will be fine after healing.

3. Remove abnormal skin pigmentation:

The abnormal skin pigmentation on the face is one of the most common and most impediment to skin beauty. There are many reasons for this, such as the use of unsuitable cosmetics or prolonged exposure to irritating drugs, mosquito bites, exposure to sun, scald and other causes of abnormal hyperpigmentation. They also include melasma, Uterine spot, butterfly spot, etc.

Cosmetologists often use "frosting, bleaching, skin care" to treat. The result is not only unsatisfactory, but also often counterproductive, making the pigment deeper and deeper, and it is difficult to have a significant effect on medication. Ultrasound is used in combination with freckle essence and large doses of vitamin C. , Quick effect, can completely remove abnormal pigments. During the treatment, it is necessary to analyze the causes and types of plaques in detail. For those plaques that cannot be found or the plaques that have basically been shaped are no longer growing, the application of ultrasound treatment, combined with a traditional Chinese medicine mask or taking symptomatic Chinese medicine, will have a better effect.

4. Differentiated pigments to remove subcutaneous patches:

Dermatologists and cosmetologists often find that there are human face spots, in addition to color, there are also shades, some are only on the epidermis, and some are under the skin, such as dark spots or pigmentation. Methods such as electrocautery, dermabrasion, and skin peeling may be self-defeating in the end. If the dermis is damaged and permanent scars are created, the patient will hate his life. Using an ultrasonic beauty machine with drugs that can differentiate plaque cells for external treatment, the effect is immediate. .

5, to prevent skin aging and dryness, anti-wrinkle and wrinkle, removing blood stasis:

Decreasing the hyaluronic acid content in the dermis will reduce the skin's ability to bind with water, reduce the moisture content in the cells and cause skin dryness, and it is easy to produce obvious wrinkles after the age of 30. Nowadays women usually rely on nutrition and active protein collagen cream or anti-wrinkle cream. The skin is used to ease aging, but due to limited cell absorption and deep tissue metabolism stasis, the effect is not good. If you use ultrasound with nutrient creams such as placenta, anti-wrinkle cream or vitamin E oil for short-term intensive massage, in addition to providing skin with high nutrition, collagen In addition to protein and moisturizing factors, it can also activate and stimulate deep cells, so that the deep cells absorb nutrients in a large amount to slow down aging and dryness, and promote the activation of new cells to improve the skin's luster.

Wrinkles are a symbol of aging. Applying an ultrasonic beauty machine and high-quality anti-wrinkle cream can quickly penetrate the drug tocopherol in the anti-wrinkle cream, which can strengthen metabolism and anti-aging, and prevent the formation of small wrinkles. On the one hand, the mechanical massage effect of ultrasonic waves is used. Regulates the re-arrangement of subcutaneous cells through changes in the cell membrane, on the other hand, strengthens blood circulation and metabolic functions, so that the skin that lacks water and nutrients is replenished, so the small wrinkles gradually disappear.

6, reduce eye bags and eliminate dark circles:

Ultrasound massage can effectively accelerate blood and lymph circulation and enhance metabolic function; plus heat energy, it can dissolve fat more, accelerate subcutaneous absorption, dissipate excess water and fat, eye bags will disappear, and venous blood circulation will disappear. Speeding up, reducing blood stasis, normal blood circulation, blue is no longer obvious, and dark circles are gone. When doing this treatment, you must use a small vocal head of an ultrasonic beauty machine, with nutrition cream, eye cream or essence, and massage in the direction of the skin texture. Each eyebag is 5 minutes each, the intensity should be small, and the action should be gentle and careful. Do not let the drug enter the eyes, the acoustic head cannot be aligned with the main direction of the eyeball, so as not to affect the intraocular pressure and water content of the eyes

7. Soften scars and lighten pigments:

Some people's constitution can cause new organisms with benign connective tissue after infection with light or severe trauma, burns, burns or acne. The formation of such scars does not occur immediately after the wound is healed, but appears after the hyperplasia period of the scar about 1-2 months after the healing.

The initial period of skin flushing and a few capillaries dilate, this is the period of scarring. If proper treatment is not given, the redness and swelling will become increasingly prominent, and the dilated capillaries will gradually increase. The edema will be prominent, significantly higher than the skin surface, followed by fibrosis, and it will be very firm to touch. For the face, serious sequelae of facial disability or crooked eyes may occur.

If this kind of keloid is local or small area, you can use ultrasound with Tianqi cream or scar softener to massage once every 2-3 days with slight gravity, for 2-3 consecutive courses, it can gradually soften and change the scar. Flat and dilute pigment.

8. Do massage to improve the cortex:

The quality of facial skin is strictly different for everyone, and is generally classified as oily, dry, mixed, and sensitive. Naturally, the skin is white and tender, and many people are uniquely endowed with it. However, more people are affected by a variety of different factors, which will cause a lot of skin problems, such as long spots, sores, and wrinkles. It can be prevented early, and of course, it can be avoided or reduced. Even if a problem occurs, it can be properly treated in time, the skin problem can be eliminated as soon as possible, and the skin quality can be improved or restored. Ultrasound is often used in skin care, which can make the cortex thinner, tenderer, fat-removing, and improve disease resistance. It is indeed an excellent method of beauty and health care.

China

In January 2014, a new discovery from scientists at the California Institute of Technology's Garyland Institute showed that direct application of ultrasound to specific areas of the brain can enhance people's ability to distinguish between touch. This discovery demonstrates for the first time that low-intensity, transcranial focused ultrasound can regulate human brain activity and improve awareness. Related papers have been published online in Nature Neuroscience.

Researchers sent focused ultrasound to areas of the cerebral cortex that process the sensations of the hands. To stimulate the intermediate nerve (a nerve that runs down the arm through the carpal tunnel), they placed a small electrode on the volunteer's wrist and recorded their brain response with an electroencephalogram (EEG). Then before stimulating the nerve, aim at the corresponding brain area and start sending ultrasound. It was found that ultrasound can reduce EEG signals and weaken brain waves' response to coded tactile stimuli.

The researchers then performed two traditional neurological tests: two-point discrimination and frequency discrimination. The former checks whether the volunteer can distinguish two adjacent objects that are in contact with the skin at two different points; the latter tests the volunteer's sensitivity to the frequency of a stream of airflow. Experiments have shown that volunteers receiving ultrasound have noticeably improved their ability to discern small differences in near-object, continuous airflow frequencies. When the research team moved the ultrasound beam one centimeter from its original location, the effect disappeared.

Researchers believe that focused ultrasound in the area of the brain it targets changes the balance of excitement and inhibition when processing sensory stimuli. This change prevents the expansion of stimulus excitement and enhances awareness. This discovery has led to a new, non-invasive method of regulating human brain activity with a spatial resolution greater than any existing method. Based on the results of related research, researchers believe that the spatial resolution of ultrasonic transcranial magnetic stimulation and transcranial direct current stimulation is higher.

Ultrasound provides technical and theoretical proof for accurate grasp of neural circuit activity, helps to develop potential therapies for neurodegenerative disorders, and brings powerful new tools for exploring normal human brain function, understanding cognition, decision making and thinking . ^[1]

With the development of science and technology and the advancement of medical technology, traditional surgery has also undergone progress over and over. From surgical operation to laparoscopic surgery, to today, surgical operation has achieved no surgery, no scars, and in vivo surgery in vitro. This is the focused ultrasound operation independently developed in China. So, will focused ultrasound surgery bring some harm to patients? With this question, People's Daily Science China interviewed the professor of Chongqing Medical University's School of Biomedical Engineering, the director of the National Engineering Research Center of Ultrasound Medicine, Wang Zhibiao, China's chief scientific communication expert, and the member of China's chief science communication expert group, and the Ultrasonic Medical National Engineering Research Center. Wang Lian, an expert and chief physician ^[2] .

For many people, focused ultrasound surgery is new and one might think that traditional open surgery or surgery is safer and more reliable. So, will focused ultrasound surgery harm patients? In response, Wang Zhibiao said, "In the past, it was only a myth to see the belly with the naked eye, but modern science has enabled us to realize this myth. B ultrasound, CT, magnetic resonance, and PET can all allow people to see the body in vitro. It s even clearer than the surgery. We can even do 3D organ reconstruction now. These are the use of ultrasound or X-rays to penetrate the human body. These are not harmful to the human body. The principle of focused ultrasound surgery is the same as these. "Using ultrasound to pass through the human body is also harmless to the human body." ^[2]

Focused ultrasound surgery is to focus harmless low-energy ultrasound through the body to the affected part of the body. The temperature of the focused focus can reach 60 ~ 100 in an instant. So will such a high focus temperature cause certain harm to the human body? In this regard, Wang Zhibiao said that when the ultrasound wave passes through a human hand, the hand will only feel a slight vibration, but when the ultrasound wave is focused to a point, its temperature will rise instantly and the tumor cells in the body will be completely killed. The focus is highly accurate, so other tissues of the body are not harmed. "According to the clinical treatment plan formed by our many years of research, and the doctor's real-time monitoring of the surgery, focused ultrasound surgery can only persecute the tumor and protect other body tissues from harm," said Wang Zhibiao ^[2] .

Focused ultrasound surgery is to ablate the lesion tissue in the human body instead of directly removing it. Will this cause certain harm to the human body? In this regard, Wang Lian said that human beings have inherently strong immune capabilities and rejection functions. When a trauma occurs, the human body will quickly activate the self-healing function. The original state, even the traces of injury can not be seen, this is due to the huge function of the body's immune repair. " She pointed out that when necrotic tissues, such as uterine fibroids, are killed by focused ultrasound and high temperature, the body will automatically start the self-healing system, so as to identify and surround the necrotic tissue, and then decompose, swallow and absorb it ^[2] .