Vacuum is a clear difference from acoustic cavitation. Ultrasonic cavitation - what is it? Video: "Ultrasonic cavitation or non-surgical liposuction"

Cavitation occurs during rarefaction half-periods. bubbles on the so-called cavitation embryos, which most often manifest themselves. gas inclusions contained in the liquid and on the oscillating surface of the acoustic. emitter. Therefore, cavitats. the threshold increases as the gas content in the liquid decreases, with an increase in hydrostatic. pressure, after compressing the liquid with high (=103 kgf/cm2=108 Pa) hydrostatic. pressure and when the liquid is cooled, and in addition, when the frequency of sound increases and the duration of sounding decreases. The threshold for a traveling wave is higher than for a standing wave. The bubbles collapse during half-periods of compression, creating short-term (duration = 10-6 s) pressure pulses (up to 108 Pa or more), capable of destroying even very strong materials. Such destruction is observed on the surface of powerful acoustic materials. emitters operating in liquid. Cavitation slamming pressure. bubbles increases with a decrease in sound frequency and with an increase in hydrostatic pressure. pressure; it is higher in liquids with low saturation pressure. pair. The collapse of bubbles is accompanied by adiabatic. by heating the gas in the bubbles to a temperature of = 104°C, which apparently causes the bubbles to glow at K. (so-called). K. is accompanied by ionization of gas in bubbles. Cavitats. The bubbles group together to form cavitation. an area of ​​complex and variable shape. It is convenient to evaluate the intensity of cavitation by the destruction of thin aluminum foil, in which cavitating bubbles punch holes. According to the number and location of these holes that appear beyond the definition. time, one can judge the intensity of the radiation and the configuration of the cavitation. areas.

If the liquid is saturated with gas, it diffuses into bubbles and their complete collapse does not occur. When floating, such bubbles carry away gas and reduce its content in the liquid. Intense under the influence of sound. waves of gas-filled bubbles both in free liquid and near the surface of a solid. bodies create microflows of liquid. K. has a harmful effect on the operation of underwater emitters, limiting the possibility of further increasing the intensity of sound emitted into the liquid. Acoustic K. and related physical phenomena cause, for example, the destruction and dispersion of solids. bodies, emulsification of liquids, and is therefore used for cleaning the surfaces of parts. These effects owe their origin to impacts during the collapse of bubbles and microflows near them. Other effects (eg initiation of chemical reactions) are associated with ionization of the gas in the bubbles. Thanks to this acoustic K. is increasingly used in technology. processes.

Acoustic K. is used in biology. Pressure pulses arising in cavitation. bubbles, cause instant ruptures of microorganisms and protozoa located in the aquatic environment exposed to ultrasound. K. is used for isolation from animals and for growing. cells enzymes, hormones and other biologically active substances.

Physical encyclopedic dictionary. - M.: Soviet Encyclopedia. Editor-in-chief A. M. Prokhorov. 1983 .

See what “acoustic CAVITATION” is in other dictionaries:

- (from the Latin cavitas void), the formation in a droplet liquid of cavities filled with gas, steam or a mixture of them (the so-called cavitation bubbles or caverns). Cavitats. bubbles form in those places where the pressure in the liquid becomes below a certain critical ... Physical encyclopedia

- (from Latin cavitas void) the formation in a liquid of cavities (cavitation bubbles, or caverns) filled with gas, steam or a mixture of them. Cavitation occurs as a result of a local decrease in pressure in the liquid, which can occur either when... ... Big Encyclopedic Dictionary

AND; and. [from lat. cavitas emptiness]. Specialist. The formation in a liquid, due to a sharp decrease in pressure, of bubbles, cavities filled with gas or steam. ◁ Cavitation, oh, oh. K y bubbles. * * * cavitation (from Latin cavitas emptiness),… … encyclopedic Dictionary

- (from the Latin cavitas void) the formation in a droplet liquid of cavities filled with gas, steam or a mixture of them (the so-called cavitation bubbles, or caverns). Cavitation bubbles form in places where the pressure in the liquid... ...

Simulation of cavitation Cavitation (from the Latin cavitas void) is the process of vaporization and subsequent condensation of air bubbles in a liquid flow, accompanied by noise and gas... Wikipedia

cavitation

Elastic waves with frequencies approx. from (1.5 2) 104Hz (15 20 kHz) to 109 Hz (1 GHz); frequency range U. from 109 to 1012 1013 Hz is usually called. hypersound. The frequency range of the U. is conveniently divided into three ranges: U. low frequencies (1.5 104 105 Hz), U. ... ... Physical encyclopedia

Elastic vibrations and waves with frequencies from approximately 1.5 2 ․104 Hz (15 20 kHz) and up to 109 Hz (1 GHz), the frequency range from 109 to 1012 13 Hz is usually called hypersound. The frequency range of the U. can be divided into three subregions: U. low ... ... Great Soviet Encyclopedia

I elastic vibrations propagating in a gaseous, liquid or solid medium, which, acting on the auditory analyzer, cause auditory sensations. Sound vibrations are characterized by frequency (the number of complete vibrations per unit time) and... ... Medical encyclopedia

cavitation- Cavitation Cavitation The formation of cavities in a liquid (cavitation bubbles, or cavities) filled with gas, steam or a mixture of them. Cavitation occurs as a result of a local decrease in pressure in the liquid, which can occur either when... ... Explanatory English-Russian dictionary on nanotechnology. - M.

Ultrasound- elastic sound vibrations of high frequency. Typically, the ultrasonic range is considered to be the frequency range from 20,000 to a billion Hz. In liquids and solids, sound vibrations can reach 1000 GHz.

The frequency of ultra-high-frequency ultrasonic waves used in industry and biology lies in the range of the order of several MHz. Focusing of such beams is usually carried out using special sonic lenses and mirrors. An ultrasonic beam with the necessary parameters can be obtained using an appropriate transducer. The most common ceramic transducers are barium titanite. In cases where the power of the ultrasonic beam is of primary importance, mechanical ultrasound sources are usually used.

Ultrasound emitters can be divided into two large groups. The first includes emitters-generators; oscillations in them are excited due to the presence of obstacles in the path of a constant flow - a stream of gas or liquid. The second group of emitters are electroacoustic transducers; they convert already given fluctuations in electrical voltage or current into mechanical vibrations of a solid body, which emits acoustic waves into the environment.

Ultrasonic cavitation - the appearance in a liquid irradiated with ultrasound of pulsating and collapsing bubbles filled with steam, gas or a mixture of them. Cavitation bubbles in an ultrasonic wave propagating in a liquid arise and expand during rarefaction half-periods and contract after moving to a region of increased pressure.

In ideal homogeneous liquids, bubbles can arise only under very high tensile forces (negative pressures) exceeding the strength of the liquid.

The strength of real liquids is quite low due to the fact that they always contain quite a lot of cavitation nuclei - gas microbubbles, dust particles of hydrophobic particles, etc. It is also possible that cavitation nuclei continuously arise when cosmic particles pass through the liquid, and then dissolve again. Gas bubbles with a diameter of 10 -5 cm can apparently remain in water indefinitely if their surface is stabilized by organic contaminants usually present in “clean” water.

In addition, it is assumed that gas microbubbles, even those not stabilized by organic matter, in principle cannot dissolve due to the structure of water in the liquid-gas interphase layer that bounds the bubble.

The cavitation threshold is the ultrasound intensity below which cavitation phenomena are not observed. The cavitation threshold depends on parameters characterizing both ultrasound and the liquid itself.

For water and aqueous solutions, cavitation thresholds increase with increasing ultrasound frequency and decreasing exposure time.

When the nucleating bubbles expand into a region of low pressure, the liquid evaporates into the bubble and the gas dissolved in the liquid diffuses. If the temperature of the liquid is well below its boiling point, bubbles grow mainly by diffusion.

As the pressure increases in the next half of the oscillation period, the bubble contracts, the direction of diffusion changes, and the molecules diffuse from the bubble into the liquid. The amount of diffused gas is proportional to the surface area of ​​the bubble. This area in the compression stage is smaller than in the expansion stage. Therefore, the amount of gas entering the bubble during expansion is slightly greater than the amount of gas leaving the bubble during its compression. Therefore, after each compression-extension cycle, excess gas remains in the bubble.

The accumulation of gas in a bubble, which causes an increase in the average size of the bubble in a field of variable pressure, is called rectified, or directed, diffusion. The diffusion mechanism ensures relatively slow growth of nuclei, and at high ultrasound frequencies they manage to undergo a significant number of pulsations before reaching resonant sizes. The pulsation amplitude of a bubble with resonant dimensions (for a given ultrasound frequency) will be maximum. Bubbles pulsating for many periods are called stable cavities, and the very phenomenon associated with the existence of such bubbles in a liquid is called stable cavitation.

An increase in ultrasound intensity leads to unstable cavitation: the bubbles quite quickly (over several periods) reach a resonant size, rapidly expand, and then abruptly collapse.

It is assumed that upon collapse, the vapor-gas mixture contained in the bubble is adiabatically (without having time to exchange heat with the environment) compressed to pressure 105 Pa (300 atm) and heats up to temperatures of the order 8000 - 12000 K. It is known that already at 2000 K near 0,01 % H 2 O molecules inside the bubble dissociate into hydrogen and hydroxyl free radicals. These radicals can recombine to form electronically excited states of H 2 O* molecules: When H 2 O* molecules transition from an electronically excited state to the ground state, a quantum of light is emitted - sonoluminescence occurs.

Free H and OH radicals can diffuse into solution and react with the solvent or solutes, initiating radical chemical reactions.

Collapsed cavitation bubbles generate powerful pressure pulses and shock waves in the liquid.

Cavitation in a liquid is accompanied by various phenomena:

Characteristic noise over the entire frequency range and a strong acoustic signal at a frequency equal to half the frequency of the ultrasound that caused cavitation;

Accelerating some chemical reactions and initiating others;

Intense microflows and shock waves capable of mixing layers of liquid and destroying the surfaces of solid bodies bordering the cavitating liquid;

Ultrasonic glow, as well as various biological effects.

Due to the concentration of energy in very small volumes, ultrasound can cause phenomena such as the breaking of chemical bonds of macromolecules, initiation of chemical reactions, erosion of solid surfaces and glow. Cavitation in cell suspension.

When the ultrasound intensity increases to values ​​where mechanical forces arise in the medium comparable to the strength of cell membranes, the process of cell destruction begins.

Typically, the appearance of significant mechanical disturbances in liquids is associated with the appearance of stable and unstable gas bubbles in them, which can form in water and aqueous media if the ultrasound intensity exceeds the cavitation threshold.

Thus, the cells of a unicellular algae begin to collapse at an average intensity equal to 0.2-0.3 W/cm 2, at frequency 1 MHz, which corresponds to the cavitation threshold in aqueous suspensions with a small concentration of cells.

At high frequencies of ultrasonic influence on a cell suspension, the destruction mechanisms are also of a mechanical nature. The threshold intensity of ultrasound to cause cell death depends on both the frequency of the ultrasound and the type of cell.

For example, the threshold for the destructive action of ultrasound for cells of one of the Elodea populations is equal to 75 mW/cm 2 and is located in the area 0.65 MHz, and for the other two Elodea populations the minimum intensity fatal to cells is equal to 180 mW/cm 2 (5 MHz). Ultrasonic cell disintegration has been widely used in biotechnology, and biochemical and virological studies to isolate individual substances or cell fragments, as well as in laboratory diagnostics to determine the mechanical resistance of cell membranes.

Animation

Description

Cavitation is the phenomenon of formation in a liquid of cavities filled with gas, steam or a mixture of them (cavitation bubbles or cavities). Cavitation bubbles form in those places where the pressure in the liquid becomes below the critical value Рcr (in a real liquid Рcr is approximately equal to the saturated vapor pressure of this liquid at a given temperature).

Acoustic cavitation, in contrast to hydrodynamic cavitation (caused by a decrease in pressure due to large local velocity values ​​in a flow of moving fluid), occurs when high-intensity sound waves pass through and the sound pressure amplitude exceeds a certain threshold value. Cavitation bubbles arise during the half-period of rarefaction on the so-called cavitation nuclei, which are most often gas inclusions contained in the liquid and on the oscillating surface of the acoustic emitter.

Therefore, the cavitation threshold increases as the gas content in the liquid decreases, with an increase in hydrostatic pressure, after “compression” of the gas in the liquid (~ 108 Pa) by hydrostatic pressure and as the liquid cools, and in addition, with an increase in the frequency of sound and a reduction in the duration of sounding.

The threshold for a traveling acoustic wave is higher than for a standing one. The bubbles collapse during half-cycles of compression, creating short-term (lasting ~ 10-6 s) pressure pulses (up to 108 Pa and higher), capable of destroying even very strong materials. Such destruction takes place on the surface of powerful acoustic emitters operating in liquid.

At a liquid temperature close to its boiling point, the dominant contribution to bubble formation comes from liquid evaporation; such processes are observed, for example, when cavitation occurs in cryogenic liquids.

The sound field in a liquid that causes cavitation is usually spatially inhomogeneous. This leads to the fact that, along with pulsations, the bubble moves forward. In a standing ultrasonic wave, the direction of motion of the bubble depends on the relationship between its radius Rres of the bubble, the frequency of its own oscillations coincides with the frequency of the ultrasonic wave. When the bubble size is less than the resonant one (R Rres) bubbles move to pressure nodes.

The speed n of translational (translation) movements of bubbles of radius R 0 at hydrostatic pressure P 0 located in an ultrasonic field with sound pressure R a is equal to:

,

where h is the coefficient of kinematic viscosity of the liquid;

s - surface tension coefficient;

x i - spatial coordinate (i=1,2,3...).

The translational movement of bubbles is the cause of the coagulation mechanism of cavity growth. For example, a cavitation cavity at the focus of an ultrasonic concentrator can be formed as a result of coagulation (that is, joining together) of centripetally moving bubbles. At the same time, bubbles with sizes exceeding the resonant size can be ejected from the focal region, forming the often observed fluctuating fan-like (“flying”) bubble streams.

Quantitatively, the moment of cavitation occurrence and the degree of its development characterize cavitation number:

c =(P 0 -P s )/P a ,

where P s is the saturated vapor pressure;

P a - sound pressure amplitude;

P 0 - hydrostatic pressure, i.e. amplitude of pressure decrease in the liquid.

The moment of cavitation occurrence is characterized by a critical number c k, which corresponds to the critical value of sound pressure P k; both of these quantities depend on many parameters characterizing the state of the liquid - gas content (Fig. 1) for water, temperature, presence of impurities and sound field - frequency (Fig. 2) for water, duration of the emitted pulse, etc.

Dependence of critical sound pressure on gas content in liquid

Rice. 1

Dependence of the critical sound pressure on the frequency of sound vibrations

Rice. 2

Timing characteristics

Initiation time (log to 0 to 1);

Lifetime (log tc from 0 to 5);

Degradation time (log td from -1 to 0);

Time of optimal development (log tk from 1 to 4).

Diagram:

Technical implementations of the effect

Technical implementation of the effect

Acoustic cavitation can easily be observed in a conventional laboratory ultrasonic bath when the ultrasonic power is increased or the water is heated.

Applying an effect

Literature

1.Ultrasound / Ed. I.P. Golyamina. - M.: Soviet Encyclopedia, 1979.

2. Brekhovskikh L.M., Goncharov V.V. Introduction to continuum mechanics. - M.: Nauka, 1982.

Keywords

• acoustic vibrations
• ultrasound
• sound pressure
• hydrostatic pressure
• boiling
• cavitation
• bubbles

Sections of natural sciences:

Used in scientific and technical effects:

Cavitation is popular in medicine and cosmetology. We are talking about a phenomenon in which cavities filled with gas are formed in a liquid. Numerous before and after reviews prove the effectiveness of the procedure, especially in cosmetology.

To achieve the best results in the fight against fat deposits, it is important to listen to a specialist who will give useful recommendations to prevent complications or side effects.

Cavitation is an innovative method in cosmetology, with the help of which you can easily and painlessly say goodbye to fat deposits, cellulite, and extra pounds forever. A couple of sessions will help reduce your waist size, and after the full course, your body will noticeably become ideal.

The method is based on the effect of low-frequency ultrasonic waves on fat cells. Extra pounds are burned due to the destruction of the cell membrane. Other cells (epidermis, vascular endothelium, muscle fibrils) remain unharmed due to their high elasticity coefficient.

The price of one session depends on the area of ​​the body being treated:

The essence of ultrasonic cavitation is as follows:

1. Low frequency ultrasound waves affect fat cells (adipocytes).
2. A small bubble forms inside each of them. Its volumes are gradually increasing.
3. Softened fat expands and there is not enough room for it. The cell membrane bursts. The fat is displaced by the resulting bubbles.

Large fat cells are more exposed to the powerful effects of high voltage. The bulk of breakdown products (90%) end up in the liver and lymphatic system. The remaining 10% is absorbed into the blood through blood vessels and transformed into glucose.

There are 2 types of cavitation:

In medicine and cosmetology, ultrasonic cavitation is mainly used to combat excess fat deposits and body correction.

Advantages and disadvantages

Cavitation (reviews before and after the procedure are left by numerous representatives of the fair sex who have already tried this innovative method of combating fat deposits) is carried out by professional cosmetologists in specialized beauty salons.

Acoustic liposuction has positive and negative sides:

Ultrasonic cavitation is also used in combination with other cosmetic skin care procedures. Once fat cells are removed, new ones are not restored. A pre-procedure examination will help prevent side effects.

It is also important to follow the cosmetologist’s recommendations after each session (follow a diet, exercise).

Acoustic liposuction can be performed at home if you purchase a special gel and device. Before starting the course, it is recommended to consult with a cosmetologist who will tell you how to correctly do the procedure yourself in order to prevent serious complications from occurring.

Indications

Body correction is indicated for people who have the following problems:

• loose skin on the back, arms, thighs, buttocks and abdomen;
• cellulite of varying degrees;
• wen, lipoma;
• various problems and defects after liposuction, which was performed surgically;
• impaired material metabolism.

Body cavitation is also recommended for those who have fat folds on their body, deposits on the knees, sides and abdomen. Positive and negative reviews before and after the procedure are direct evidence that it should be approached with the utmost responsibility. Otherwise, the chance of serious complications and consequences increases.

Contraindications

An examination by a doctor and consultation with a cosmetologist are a certain stage in preparing for ultrasonic cavitation. The specialist will tell you how acoustic liposuction is performed and what the advantages of the procedure are. He will conduct an examination and tell you which parts of the body require correction first.

A full medical examination will be required to ensure that there are no serious contraindications, which include the following conditions:

• period of bearing a baby and breastfeeding;
• renal and pulmonary failure, hepatitis;
• heart failure;
• purulent and inflammatory processes on the skin;
• chronic diseases of the digestive system;
• osteoporosis;
• thrombosis;
• thrombophlebitis;
• damage to the skin at the site where the procedure is planned;
• poor blood clotting;
• pathological changes in the functioning of the immune system;
• fibroids, cervical erosion;
• malignant or benign neoplasms;
• pathological processes in the ovaries;
• obesity 2-3 degrees;
• umbilical hernia;
• high blood pressure (hypertension);
• chronic diseases of infectious origin at the acute stage;
• diabetes mellitus (uncompensated stages).

It is not recommended to attend ultrasonic cavitation if you have implants or pacemakers. Ultrasonic waves can negatively affect the operation of devices. The same applies to scars, scars or tattoos on the body in the treated area.

You should also postpone the procedure if the person took non-steroidal anti-inflammatory drugs or aspirin 10 days before the session. The procedure is new and not yet fully studied, so the list of contraindications may be longer. That is why it is important to follow all the cosmetologist’s instructions and follow the regime after each session.

What examinations need to be completed

Cavitation (reviews before and after are different, since the method is innovative and gaining popularity) is carried out after a full medical examination. It is important to exclude the risk of side effects and the presence of contraindications.

You will also need to conduct a biochemical blood test, which will rule out an inflammatory process in the body or other diseases.

Preparation

If there are no contraindications to ultrasonic cavitation, you can begin preparing for the procedure, following the recommendations of cosmetologists:

1. 3 days before the start of the course, give up bad habits (alcohol, tobacco products).
2. For 4 days before the first procedure, exclude fried, fatty, salty and sweet foods from the menu. They contain substances that slow down the metabolic process.
3. Drink 1.5 liters of pure liquid per day.
4. On the day of the session, it is recommended to cleanse the skin using peeling so that the lipolytic gel penetrates the skin better.

Immediately before the ultrasonic cavitation procedure, it is recommended to drink 1 liter of still water. You should not ignore the recommendations of a cosmetologist, since there is a high probability of complications or side effects.

Procedure

Cavitation (reviews before and after the procedure are left by real girls who visited the salon for body correction) is an innovative method and an expensive means of combating fat deposits. Cavitation liposuction is performed with a special device that includes maniples and emits low-frequency ultrasound (38 kHz).

All information about the progress of the session is displayed on a special screen. The device also has a built-in memory that allows you to save information about therapy programs. More often women resort to cavitation, sometimes men go to salons.

Features of the use of ultrasonic cavitation:

1. The device allows the use of various ultrasound programs.
2. The duration of one session takes 45-60 minutes.
3. Lasting results on one zone can be achieved through 3-6 sessions. The interval between them is 5-8 days.
4. To speed up the destruction of fat cells in the body, it is recommended to combine ultrasonic cavitation with other cosmetic procedures (lymphatic drainage, pressotherapy, ozone therapy, mesotherapy, thermolifting).

After the first session, the results are noticeable: the waist decreases by 3 cm, the body contour is restored, and the skin structure improves. Ultrasonic cavitation is most often performed on the abdomen and thighs. These areas are the most problematic.

Each procedure provides a specific algorithm:

1. The skin on the treated area is cleaned and a special gel is applied.
2. The cosmetologist selects the required program and attachment. All individual characteristics of a person are taken into account (gender, skin physiology, body area).
3. The session lasts from 20 minutes to 1 hour.
4. After completion of the procedure, any remaining gel is removed from the skin.

During the session, the person relaxes, feels warmth and a slight tingling sensation. If there is discomfort, it is important to tell the specialist to lower the power of the device.

Recovery after

Cavitation (reviews before and after the procedure prove the effectiveness of the method in the fight against fat deposits) requires strict adherence to all the rules and recommendations of the cosmetologist. It is important to remember about physical activity so that the result after each session is more noticeable.

Gymnastics and sports activities speed up the metabolic process, improve blood circulation, which prevents the appearance of new fat cells.

1. You should not use body cosmetics for 2 months. You can only use aloe or moisturizer, which has a cooling effect.
2. After ultrasonic cavitation, lymphatic drainage is recommended.
3. The skin should be washed exclusively with cool water.
4. For several days after ultrasonic cavitation, it is strictly forbidden to consume seafood, spicy foods, fried and fatty foods.
5. You should refrain from drinking alcoholic beverages for 3 weeks after the procedure.
6. Continue to drink clean water every day, at least 2 liters.
7. Carry out self-massage 2 times. per week to improve lymphatic drainage.

When performing ultrasonic liposuction on the face, the cosmetologist recommends using sun protective cream. You should choose a product for your skin type. It is necessary to constantly moisturize it.

How long will the results last?

It is important that after each session a woman adheres to a daily routine and rest, eats properly and nutritiously, and also maintains an active lifestyle. Otherwise, the risk of recurrence of fat deposits increases. The effect of ultrasonic cavitation lasts for many years.

In one session, the specialist removes up to 15 cm3 of fat deposits; in terms of waist size, this is 3-5 cm. Over the next week, the effect of ultrasonic cavitation intensifies. Blood circulation is restored, fibroblasts are stimulated. The elasticity and tension of the skin on the treated area of ​​the body improves. Flabbiness and sagging are eliminated.

Strengthen the effect and speed up the process of removing breakdown products from fat cells by the circulatory and lymphatic system The following procedures will help:

Possible complications

Hematomas, dehydration, pain during the procedure or after the session are also side effects of the procedure. The same applies to local hyperpigmentation.

Each weight loss method has advantages and disadvantages, as evidenced by numerous reviews before and after the procedures. Ultrasonic cavitation is a new technology and is only gaining popularity. It is important to follow all the recommendations of the cosmetologist so that the fight against fat deposits takes place without serious consequences.

Video about cavitation, its advantages and rules of implementation

Master class on cavitation:

Cavitation and power:

Fat deposits consist of tissue that looks like small bubbles connected to each other. Cells increase in volume as they gain weight. When a person follows a strict diet or exercises, the bubbles decrease. The body has a greater tendency to accumulate fatty tissue rather than reduce the amount of strategic reserves.

Therefore, it is much easier to gain weight than to lose excess weight. A new method of hardware cosmetology called ultrasonic cavitation is designed to solve a complex problem.

What is ultrasonic cavitation?

This is know-how that has made a real revolution in modern cosmetology. The method allows a person to get rid of unwanted fat deposits. Translated from Latin, cavitas means emptiness, bubbles. As a result of the procedure, the adipose tissue is loosened, and lipid deposits quickly decrease in volume.

Types of cavitation:

• hydrodynamic;
• acoustic.

The first option is due to a decrease in pressure in the liquid medium, as a result of which the speed of fluid movement increases. For cosmetic purposes, the acoustic cavitation method is used. It appears when an ultrasonic wave of enormous intensity penetrates a liquid medium.

The essence of the method:

1. Ultrasound with low frequencies affects adipocytes (fat cells).
2. A small bubble appears inside the cell and increases in volume. Sometimes several bubbles form.
3. Softened fat does not fit in the middle of the cage. The membrane ruptures, and it is forced out by the neoplasm.
4. Large cells are most susceptible to the effects of ultrasonic waves, since they are more affected by high voltage.
5. Decomposition products enter the lymphatic ducts (about 90%) and the liver.
6. 10% of substances are absorbed into blood vessels. Over time, they are transformed into glucose.

Ultrasound waves do not affect the normal functioning of muscle fibers, skin cells and blood vessels. This is due to the strength and elasticity of the fabrics.

During the experiments, an interesting fact was discovered: ultrasonic waves of low frequency from 30 to 70 kHz and pressure parameters of 0.6 kPa promote the formation of a certain flow in adipocytes, as a result of which small bubbles arise (cavitation).

Under the influence of a high frequency, small bubbles are formed, and under the influence of a low frequency, large ones. The optimal option is parameters from 37 to 42 KHz. This frequency promotes the formation of bubbles of a suitable size. They gradually become larger and squeeze fat out of the cell. The bubbles burst, resulting in a kind of explosion at the molecular level and a release of energy.

Cell membranes are destroyed due to high voltage. The fullest adipocytes are damaged first. Decomposition products - triglycerides enter the intercellular space. As a result of natural metabolic processes, 90% enters the lymphatic ducts, and 10% enters the blood ducts.

Advantages and disadvantages of the procedure

The advantages of this procedure are:

• Large application area.
• There is no need to use anesthesia or painkillers.
• A completely non-invasive method of body contouring.
• There is no rehabilitation period.
• There is no need to wear compression garments.
• The body loses weight evenly.
• After the procedure there are no scars or hematomas.
• The body is toned, there is no effect of saggy skin. This is explained by the fact that ultrasound can tighten sagging skin.
• Sensitivity is maintained in the area where cavitation was performed.
• The result is achieved quickly and lasts a long time.

The procedure is carried out in a comfortable environment, on an outpatient basis. Immediately after the session, you are allowed to engage in daily activities and lead a normal lifestyle.

Interestingly, under the influence of ultrasound waves, the adipose tissue cell is completely destroyed and does not decrease in size. This ensures that the new body shapes are maintained for a long time.

Disadvantages of cavitation.

Since the cavitation technique began to be used not so long ago, it has not yet been fully studied. The use of this procedure is recommended in the presence of high obesity (more than 15-20 extra pounds). For people who want to lose excess weight up to 15 kilograms, more suitable methods are lymphatic drainage or acupuncture.

Indications and contraindications

Indications for this procedure:

• problem areas (so-called local fat deposits): stomach, thighs, knees;
• cellulite of varying severity;
• lumpy skin surface after surgery (consequence of invasive liposuction);
• lipomas (fat);
• in dental practice: the presence of tartar and plaque;
• in nephrology: the presence of kidney stones;
• in surgery for the treatment and cleansing of purulent wounds;
• preparation of mixtures for inhalation;
• disinfection of the solution, its emulsification.

Contraindications for cavitation are:

• pregnancy, lactation;
• problems with the immune system;
• liver pathology (hepatitis, cirrhosis, hepatocellular failure);
• renal failure;
• cancer;
• presence of diabetes mellitus;
• acute allergic reaction;
• osteoporosis;
• pathology of the cardiovascular system (heart disease, cardiac failure);
• presence of a pacemaker;
• poor blood clotting;
• inguinal hernia, hernia of the white line of the abdomen;
• exacerbation of the disease (any);
• violation of the integrity of the skin in the area affected by the device;
• the presence of prostheses or other metal objects in the area where the procedure is performed.

Carrying out the procedure - step-by-step instructions

1. Turn on the device, select a program. The best option is exposure to ultrasound with frequency parameters from 37 to 42 KHz. The cosmetologist selects a suitable handpiece. There are two working attachments: one is flat, the other is slightly curved. The first is to treat problem areas with a small area, the other is to treat large areas of the body (for example, the stomach, flanks).
2. The client lies down on the couch in a semi-recumbent or supine position (depending on the area of ​​​​ultrasound exposure).
3. A special cavitation gel is applied to the selected area of ​​the body. In the absence of the drug, it is permissible to use any ultrasound gel. It helps prevent friction between the skin and the device attachment. The gel penetrates deep into the tissue, thereby helping to accelerate the breakdown of fat deposits.
4. The problem area is treated with a manipulator for 20-40 minutes. The doctor makes rotational or circular movements with his hand. A fat fold is formed in the desired area and carefully worked out (belly, flanks).
5. After the procedure, wipe off any remaining product from the surface of the skin.
6. To enhance the effect obtained, it is recommended to do lymphatic drainage or pressotherapy.

During the session, the client may hear an unpleasant whistling sound, feel warmth and burning at the point of contact of the manipulator with the body. Sometimes a tingling sensation is felt, like a needle prick.

The session lasts about 30-45 minutes. If lymphatic drainage or pressotherapy is performed after the procedure, the time increases to an hour and a half. The course consists of 5 or 7 sessions, with a frequency of once every 3-5 days. You are allowed to visit a cosmetologist once every 10 days. To maintain the results obtained, repeated treatment is recommended for up to 3 sessions after six months.

• For 3 days before the procedure, you should refrain from eating fried, smoked, high-calorie and spiced foods.
• The client is informed of the need to provide fluid to the body on the appointed day. To do this, it is recommended to increase the daily volume of liquid to 2–3 liters of purified still water.
• You should refrain from drinking alcoholic beverages. These recommendations contribute to the rapid removal of metabolic products by the liver.
• To consolidate the result, doctors advise sticking to the basics of a balanced diet, leading an active lifestyle, and drinking up to 1.5 liters per day.
• To enhance the effect obtained, experts advise using lymphatic drainage massage. If it is done immediately after a cavitation session, then the breakdown products of adipocytes are removed from the body faster and swelling is reduced.
• Vacuum roller massage is also shown, which helps eliminate cellulite.
• Due to the use of ultrasonic liposuction on large areas of the body, there is a risk of stretch marks and folds. To combat these defects, thermolifting is indicated - a method based on the influence of electric current in the radio frequency range. As a result, the production of your own collagen is stimulated.

Effect and results of the procedure

At the end of the first cavitation session, the positive effect becomes noticeable, even with the naked eye. One procedure can destroy 15 cm3 of adipose tissue. If you measure your waist circumference before and after the hardware treatment, the difference is up to 5 cm. Weight decreases. It must be borne in mind that fat deposits are quite light and loose. Initially, the client pays attention to a decrease in body volume, and subsequently to a loss of total weight.

Possible complications and side effects

Cavitation - a method of non-surgical liposuction is considered safe to use. Adverse reactions may occur in the following cases:

• presence of intolerance to ultrasound;
• exacerbation of chronic diseases (incorrect or incomplete collection of anamnestic data).

In European countries (Germany, Finland, France), doctors have a negative attitude towards the method of ultrasonic liposuction with frequency parameters below 40 kHz, since people turned to them for medical help after a course of cavitation sessions.

Patients presented the following complaints:

• exacerbation of kidney and genitourinary system diseases;
• increased bone fragility;
• pain in joints, tendons.

Low-frequency ultrasonic waves can penetrate up to 10 cm deep into the body. This circumstance can have a negative impact on the condition of internal organs, bones and joints.

In rare cases, patients complain of:

• nausea;
• dizziness;
• headache;
• tinnitus;
• labored breathing.

In this case, the procedure is immediately interrupted, the patient consults with the attending physician.

List of possible side effects:

• Dehydration of tissues in the area where ultrasonic cavitation was performed. This is explained by the fact that when adipocytes are destroyed, the amount of intracellular fluid decreases significantly. Metabolic products are adsorbed by blood and lymphatic vessels. This is a kind of protective reaction of the body to the presence of toxins.
• Pancreatic stool. During a liposuction session, the pancreas and intestines experience severe stress. The special enzyme lipase, which breaks down complex fats into simpler ones that are processed by the liver, is poorly produced.
• Skin burn. During the procedure, a small area of ​​the body is treated for a long time. The tissues are heated to high temperatures, causing the protein to denature and cause a burn.

Cost of the procedure

On average, one session of non-injection liposuction is estimated from 4 thousand to 9 thousand rubles. Lymphatic drainage massage, which is recommended after the procedure, costs from 650 to 2 thousand rubles. The total cost of the course ranges from 50 to 120 thousand rubles.