Treatment apparatus for denaturing tissue using RF energy and control method thereof

Abstract

To provide a treatment device and a control method thereof for solving a problem that treatment efficiency is low because skin is treated by using RF energy of a fixed frequency.SOLUTION: The present invention relates to a treatment apparatus for denaturing tissue using multi-frequency RF energy, which performs skin treatment using RF energy of a plurality of frequencies different in depth of delivering the RF energy into the tissue, a control method thereof, and a treatment method using the same.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a treatment device for denaturing tissue using multi - frequency RF energy and a control method thereof.

Background Art

[0002] Devices for transmitting RF energy to tissue for treatment purposes have been developed in various ways. Recently, in particular, devices that utilize RF energy to cause appropriate denaturation of the skin and exhibit a skin treatment effect by tissue regeneration have been developed.

[0003] Patent Document 1 is disclosed in relation to a conventional treatment device using RF energy. Such a conventional device has a problem of low treatment efficiency because it uses RF energy of a fixed frequency to treat the skin.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In order to solve the above - mentioned conventional problems, an object of the present invention is to provide a treatment device for denaturing tissue using multi - frequency RF energy capable of adjusting the frequency of RF energy corresponding to the depth and temperature of the tissue and a control method thereof.

Means for Solving the Problems

[0006] As a means for solving the above problems, a treatment device using RF energy is provided, which can adjust the RF energy to a multi - frequency and transmit the RF energy during one treatment.

[0007] On the one hand, the multi - frequencies of RF energy include at least three frequencies with different heating depths in the tissue.

[0008] Also, the RF energy is transmitted to the tissue by a pulse train, and the pulse train adjusts the frequency of the RF energy selected based on at least one of the treatment elapsed time, the temperature of the tissue, and the treatment mode.

[0009] Additionally, a control method for a treatment device for modifying tissue using RF energy according to the present invention is provided.

[0010] Additionally, a treatment method for constructing a pulse train with frequencies having different heating depths in skin tissue according to the present invention, and transmitting RF energy to the tissue by the pulse train to modify the tissue is provided. On the one hand, the method of treating the tissue adjusts the frequency at which RF energy is transmitted to the epidermis layer, dermis layer, and adipose layer based on at least one of the treatment elapsed time, the temperature of the tissue or the skin surface, and the treatment mode to improve the treatment efficiency.

Advantages of the Invention

[0011] The treatment device and its control method for modifying tissue using multi - frequency RF energy according to the present invention can induce regeneration by modifying the epidermis and dermis with RF energy to generate new collagen fibers, and can kill adipocytes with RF energy.

Brief Description of the Drawings

[0012]

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Mode for Carrying Out the Invention

[0013] Hereinafter, a treatment apparatus and a control method for modifying tissue using RF energy according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the description of the following embodiments, the names of the respective components can be called by other names in the art. However, if there are these functional similarities and identities, even if a modified embodiment is adopted, it can be regarded as an equivalent configuration. Also, the reference numerals added to the respective components are described for convenience of explanation. However, the illustrated contents on the drawings with these reference numerals do not limit the respective components within the scope of the drawings. Similarly, even if an embodiment with a partially modified configuration on the drawing is adopted, if there are functional similarities and identities, it can be regarded as an equivalent configuration. Also, in view of the general technical level of those skilled in the art, if a component that should be naturally included is recognized, the description thereof will be omitted.

[0014] In this specification, treatment means heating the skin tissue to exert effects such as improving Wrinkles, Tone and Textural Changes, Scars and Acne Scarring, Sagging mucosa, Overall Rejuvenation, Hyperhidrosis, laxity, lifting, tightening, Fat reduction, etc. Also, the explanation is premised on the meaning that treatment means heating fat cells to kill them and prevent additional fat accumulation.

[0015] Also, in this specification, tissue means the skin tissue of the face. Also, tissue can mean the skin tissue of various parts of the human body such as the abdomen and legs. When the skin tissue of the face is treated according to an embodiment of the present disclosure, it is possible to exert the effects of improving the above-described wrinkles and the like and the effect of improving the facial shape by killing fat cells. Improving the facial shape means that the shape and appearance of the face are changed so as to be able to exert a positive effect on the patient such as a good impression or looking young.

[0016] FIG. 1 is a block diagram showing the configuration of a treatment apparatus for denaturing tissue using multi-frequency RF energy according to a first embodiment of the present invention.

[0017] Referring to FIG. 1, a treatment apparatus 1 for denaturing tissue using multi-frequency RF energy according to a first embodiment of the present invention can be configured to include a main body 20 and a handpiece 10. The main body 20 is provided with elements for generating and controlling RF energy, and the handpiece 10 is configured to transmit RF energy to the tissue. The main body 20 can include a power supply unit 400, an RF generation unit 300, an RF adjustment unit 200, and a control unit 500. The handpiece 10 can include an electrode 100, a temperature sensor 700, and a cooling unit 600. However, although not shown, the handpiece 10 and the main body 20 are configured to be connected by a cable to transmit and receive various signals for RF energy and control. Also, the handpiece 10 and / or the main body 20 can further include a display unit (not shown) for presenting various information related to operation and treatment and receiving input of commands from the user.

[0018] The RF generation unit 300 is configured to be able to generate RF energy by receiving power supply from the power supply unit 400. The RF adjustment unit 200 is configured to be able to adjust at least one of the frequency, power, voltage, power, etc. of the RF energy generated by the RF generation unit 300. On the other hand, a widely known circuit configuration can be applied to the power supply unit 400, the RF generation unit 300, and the RF adjustment unit 200.

[0019] The electrode 100 is configured to be electrically connected to the RF adjustment unit 200 and receive the transmission of RF energy. The electrode 100 is configured to be exposed at the end of the handpiece and to be able to transmit RF energy to the tissue when in contact with the tissue. The electrode 100 can be composed of a plurality and can be arranged in a predetermined pattern. At least a part of the electrode 100 can be configured to be planar so as to be able to transmit RF energy to the tissue non-invasively. The electrode 100 can function as a Bipolar electrode or a Monopolar electrode.

[0020] The cooling unit 600 can be configured to prevent excessive damage to the tissue when RF energy is transmitted and the tissue is heated. The cooling unit 600 can cool the rear of the electrode in contact with the tissue or directly cool the skin tissue. The cooling unit 600 can inject a refrigerant so as to be able to cool the electrode and / or the tissue through the latent heat of vaporization of the refrigerant. Also, the cooling unit 600 can selectively contact the heat sink with the electrode and / or the tissue so as to be able to cool the electrode and / or the tissue by a conduction method. Also, the cooling unit 600 can be configured to be air-cooled to force air to flow inside the handpiece. However, the configuration of the cooling unit 600 described above is only an example, and it can be deformed and applied to various configurations in which the cooling power is actively adjusted according to the configuration of the control unit 500.

[0021] The temperature sensor 700 is configured to be able to measure the temperature at a plurality of points during the transmission of RF energy to the tissue. The temperature sensor 700 can be configured to include a plurality of temperature sensors. The plurality of temperature sensors are configured to be able to measure the temperature at a plurality of points in the treatment area where RF energy is transmitted.

[0022] The control unit 500 controls the RF adjustment unit 200 so as to be able to adjust the frequency or pulse width of the RF energy. The control unit 500 constitutes a pulse train and transmits multi-frequency RF energy through a sequence. Also, when it is determined that it is necessary to cut off the RF energy based on the values received from the plurality of temperature sensors 700, the control unit 500 can control the RF generation unit 300 to cut off the RF energy. Furthermore, the control unit can control the driving of the cooling unit 600 according to the value received from the temperature sensor 700 or the frequency of the RF energy applied to the current tissue.

[0023] FIG. 2 is a diagram showing the region of the skin tissue heated by the frequency of the RF energy selected in the first embodiment. At this time, the magnitude of the frequency is the first frequency < the second frequency < the third frequency.

[0024] Referring to FIG. 2, when transmitting RF energy through the skin, it can be shown that the heating depth varies depending on the frequency of the RF energy. When the RF electrode is configured as monopolar, the RF energy is transmitted from the electrode of the handpiece to a return electrode (not shown) separately attached to the human body. It has been clarified that the portions heated within the skin tissue are different for different frequencies of the RF energy.

[0025] The skin tissue can be divided from the surface into the epidermis, dermis (papillary dermis, reticular dermis), hypodermis, and fat layer. It can be shown that the conductivity and permittivity of each layer constituting the skin tissue are different from each other with respect to the RF frequency. By adjusting the frequency of the RF energy using such electrical characteristics of the tissue, it becomes possible to heat the desired heating depth within the skin.

[0026] The treatment device according to the present disclosure can select the frequency of RF energy to select the portion to be heated within the skin tissue, and can adjust the frequency of the RF energy to adjust the portion to be heated within the skin tissue.

[0027] The higher the frequency of RF energy within a specific range, the shallower the depth of the heated portion within the tissue tends to be. The control unit can adjust the heated portion within the tissue by adjusting the frequency of the RF energy to a first frequency, a second frequency, and a third frequency. The first frequency can be selected as a frequency capable of heating from the epidermis to the dermis and then to the hypodermis of the skin tissue. The second frequency can be selected as a frequency capable of heating from the epidermis to the dermis. The third frequency can be selected as a frequency capable of selectively heating the deep fat layer. At this time, the RF energy of the third frequency can heat the shallow portion and the deep fat cells of the skin tissue. As described above, when RF energy having a specific frequency is applied according to the electrical characteristics of different parts of the skin tissue, it is possible to selectively heat the deep fat layer.

[0028] The first region is from 1 to 3 MHz, the second region is from 3 to 10 MHz, and the third region is from 10 to 30 MHz. As a more detailed example, the first frequency is 2 MHz, the second frequency is 6 MHz, and the third frequency is 13 MHz. As an example, the first frequency is 2.26 MHz, the second frequency is 6.78 MHz, and the third frequency is 13.56 MHz.

[0029] However, it is not limited to the frequencies described above. In the present disclosure, the first frequency, the second frequency, and the third frequency can be divided into regions where the heating depth within the tissue changes, and the third frequency can be selected within a frequency range that can better heat fat cells than other layers constituting the skin.

[0030] FIG. 3 is a diagram showing an example of a pulse train of RF energy in the first embodiment.

[0031] Referring to FIG. 3, in the first embodiment, the pulse train of RF energy can be configured such that, as an example, the first frequency is from 1 to 3 MHz, the second frequency is from 3 to 10 MHz, and the third frequency is from 10 to 30 MHz.

[0032] On the other hand, when RF energy is transmitted within the skin tissue, the difference in energy transmission efficiency due to temperature can change abruptly. This is caused by the change in impedance within the tissue due to the temperature difference. Therefore, when transmitting RF energy to treat deep tissue, if the area in the direction where the RF energy is transmitted is pre-heated, the transmission efficiency of the RF energy can be increased.

[0033] On the other hand, as an example of the frequency constituting the pulse train in the present disclosure, initially, the first frequency for heating the epidermis, dermis, and hypodermis layers is configured at 2.26 MHz. Thereafter, the pulse train includes a rest period for a predetermined period, and then 6.78 MHz is selected as the second frequency for heating the epidermis layer and the dermis layer. When the RF energy of the second frequency is transmitted while the epidermis, dermis, and hypodermis layers are being heated by the RF energy of the first frequency, the RF energy transmission efficiency up to the dermis layer can be maximized. Thereafter, the pulse train includes a rest period for a predetermined period, and the third frequency for heating up to the fat layer can be configured at 13.56 MHz. At this time, since the RF energy of the first frequency and the RF energy of the second frequency have already been transmitted and the epidermis layer and the dermis layer are in a heated state, the electrical characteristics of each layer of the tissue change, and the thermal distribution pattern within the tissue changes. Finally, when the RF energy of the third frequency for heating the fat layer is applied to the skin tissue, the transmission efficiency of the RF energy increases, and selective heating of the fat layer is efficiently performed. Also, from a thermal perspective, since the hypodermis is pre-heated and then the fat layer is heated, heat loss from the heated fat layer to the surface can be minimized.

[0034] However, the rest period of the aforementioned predetermined period may be omitted. Further, when the electrodes are composed of a plurality of electrodes, RF energy of different frequencies can be transmitted for each electrode. In this case, RF energy of at least two of the first frequency, the second frequency, and the third frequency can be overlapped and transmitted to the tissue.

[0035] In the present disclosure, as described above, multi-frequency RF energy is used so that the transmission efficiency of the RF energy can be maximized according to the heating depth. Further, the pulse pattern of the basic pulse train is used to heat the tissue adjacent to the fat cells, and the frequency of the pulses of the RF energy is adjusted so that the deep part of the tissue can be heated.

[0036] FIG. 4 is a graph showing a heating section (heat phase) and a holding section (hold phase) according to the temperature of the tissue during the transmission of RF energy in the first embodiment.

[0037] Referring to FIG. 4, when transmitting RF energy for the death of fat cells, the treatment section can be distinguished by the temperature of the fat layer. The treatment section can be divided into a heating section (heat phase) which is a section for transmitting and heating RF energy to the fat layer and a holding section (hold phase) which is a section for maintaining the fat layer at the treatment temperature. The control unit can make the configurations of the pulse trains constituting the heating section and the holding section different from each other. As an example, in each section, the frequency of the first frequency can be adjusted to be different, or the frequency of the third frequency can be configured to be different. As another example, the ratio of the first frequency: the second frequency: the third frequency can be configured for the pulse train at different ratios in the heating section and the holding section. As an example, in the heating section, the first frequency: the second frequency: the third frequency can be configured for the pulse train at a ratio of 2:3:5, and in the holding section, the pulse train can be configured at a ratio of 1:3:6.

[0038] In addition, at least one of the pulse widths constituting the pulse train can be adjusted. That is, the pulse width of the first frequency can be increased in the heating section, and the pulse width of the third frequency can be increased in the maintenance section.

[0039] FIG. 5 is a diagram showing a pulse train of RF energy, the temperature of the tissue, and the driving time of the cooling unit in the first embodiment.

[0040] For skin remodeling, it is necessary to heat to a temperature that can transform the dermis layer, for example, 70° C. to 80° C., and denature it into a coagulation state.

[0041] On the other hand, the change in facial shape is mainly caused by the change in the flexion of the skin surface. The flexion of the skin surface can be corrected by changing the thickness of the fat layer existing deep inside. The death of fat cells has the effect of finally thinning the fat layer so as to prevent the accumulation of additional fat. It is known that a process of heating to 44° C. to 46° C. is required for the death of fat cells.

[0042] When treating the dermis and fat of the skin simultaneously, it is necessary to transform the dermis layer for skin remodeling and simultaneously kill the fat cells existing in the fat layer.

[0043] On the one hand, when the pulse trains are determined in the order of 2.26 MHz, 6.78 MHz, and 13.56 MHz, heating of the epidermis, dermis, and hypodermis is first performed, and finally the fat layer can be heated to the treatment temperature. At this time, since the temperature of the epidermal layer can continuously increase, it can be cooled to prevent excessive damage. The control unit can adjust the power of the cooling unit based on the frequency constituting the pulse train. When the control unit transmits RF energy at a frequency of 2.26 MHz at which the RF energy heats from the epidermis to the hypodermis, the power of the cooling unit can be increased. On the contrary, when the control unit transmits RF energy at a frequency of 13.56 MHz at which the RF energy concentrates in the deep part, the power of the cooling unit can be decreased.

[0044] FIG. 6 is a diagram showing the pulse train in the heating section in the first embodiment, and FIG. 7 is a diagram showing the pulse train in the maintenance section in the first embodiment.

[0045] In the present disclosure, the control unit can be configured such that the pulse trains applied in the heating section and the maintenance section are different.

[0046] As an example, referring to FIG. 6, the control unit can determine the ratio of the first frequency: the second frequency: the third frequency included in the pulse train to be 2:3:5 in order to quickly heat the tissue to the treatment temperature in the heating phase. However, when first applying RF energy to the tissue, it is preferable to configure the pulse train in the order of the first frequency for heating the epidermis, dermis, and hypodermis first, and then the second frequency for heating the epidermis and dermis. The process of changing the order of the first frequency, the second frequency, and the third frequency and transmitting the RF energy can be repeated a predetermined number of times within the heating section.

[0047] As another example, referring to FIG. 7, the control unit can determine the ratio of the first frequency: second frequency: third frequency included in the pulse train to be 1:3:6 so as to prevent damage while maintaining the tissue at the treatment temperature during the hold phase. That is, after the tissue has been raised to the treatment temperature, the frequency of the third frequency for transmitting RF energy to the fat layer with the largest specific heat can be set the highest. The frequency of the third frequency in the pulse train during the hold phase can be set higher than the frequency of the third frequency in the heating phase. In the temperature maintenance phase, the frequency of the third frequency that can selectively heat the fat cells with a high specific heat to maintain them at the treatment temperature is increased. Also, in the hold phase, pulses adjusted to the second frequency and the first frequency can be applied to the tissue to maintain the epidermal layer and the dermal layer at the treatment temperature.

[0048] Thereafter, when a predetermined time has elapsed, the control unit can interrupt the transmission of RF energy. However, the ratio in which the pulse train is configured for each of the above-described frequencies is merely an example, and the control unit can configure the pulse train with different frequencies for each frequency in the heating phase and the hold phase.

[0049] FIGS. 8 and 9 are diagrams showing a pulse train in which the pulse width in the heating phase is adjusted in the first embodiment.

[0050] The control unit can adjust the pulse width based on the temperature of the tissue measured during the transmission of RF energy.

[0051] Referring to FIG. 8, when transmitting RF energy by adjusting the frequency with a pulse train in the heat phase, if the temperature of the skin surface is measured to be lower than the required temperature, the control unit can increase the pulse width of the first frequency (2.26 MHz) so as to increase the surface temperature.

[0052] Referring to FIG. 9, contrary to FIG. 8, when the temperature of the skin surface is measured to be higher than the required temperature, the control unit can prevent excessive temperature rise of the epidermis by reducing the pulse width of the first frequency.

[0053] On the other hand, although the pulse trains shown in FIGS. 6 to 9 illustrate examples in which the frequency of the RF energy is adjusted, it is applicable after being modified so that the RF energy is adjusted to each frequency and transmitted to the tissue as a single pulse.

[0054] Hereinafter, with reference to FIGS. 10 and 11, a control method of a treatment device for denaturing tissue using multi-frequency RF energy according to a second embodiment of the present invention will be described. A control method of a treatment device for denaturing tissue using multi-frequency RF energy will be described.

[0055] FIG. 10 is a flowchart of a control method of a treatment device for denaturing tissue using multi-frequency RF energy according to a second embodiment of the present invention.

[0056] Referring to FIG. 10, a control method of a treatment device for denaturing tissue using multi-frequency RF energy according to a second embodiment of the present invention can include a step of generating RF energy from an RF generation unit (S1100), a step of transmitting the RF energy to an electrode (S1200), and a step of controlling the RF energy so as to be able to transmit multi-frequency RF energy (S1300).

[0057] The step of generating RF energy from the RF generation unit (S1100) corresponds to a step of generating RF energy when certain requirements are satisfied by a user input or by a predetermined algorithm. This step can be executed through an operation in which the control unit controls the RF generation unit. At this time, the conditions determined by the control unit are based on values measured from the electrode, such as whether the electrode maintains contact with the tissue.

[0058] The step of transmitting the RF energy to the electrode (S1200) corresponds to a step of transmitting the RF energy to the electrode.

[0059] The step (S1300) of controlling the RF energy so as to be able to transmit multi - frequency RF energy corresponds to the step of adjusting the frequency and / or pulse width of the RF energy transmitted to the electrodes. In this step, it can include the step of the control unit controlling the RF adjustment unit to adjust the frequency of the RF energy. The control unit can adjust the frequency of the RF energy to at least three different frequencies where the heating parts within the tissue of the RF energy are different.

[0060] The control unit can control the RF energy by a predetermined pulse train. As an example, the control unit can first determine the frequencies of a first frequency (about 2.26 MHz) for heating the epidermis, dermis, and hypodermis, a second frequency (about 6.78 MHz) for heating up to the dermis layer, and a third frequency (about 13.56 MHz) that can selectively heat fat, and then configure the pulse train.

[0061] The control unit can adjust the frequencies and / or pulse widths of the first to third frequencies that make up the pulse train according to the passage of the treatment time and as the temperature of the skin surface rises. The control unit can adjust the frequency / pulse width of each frequency in real time. Thereafter, the control unit can control to cut off the RF energy under predetermined conditions, for example, the amount of the total transmitted RF energy or when the treatment time has elapsed.

[0062] On the other hand, although not shown in the figure, the control unit can adjust the power of the cooling unit for cooling the skin surface based on the temperature of the tissue surface and / or the frequency of the applied RF energy.

[0063] FIG. 11 is a detailed flowchart of the second embodiment of the present invention.

[0064] Referring to FIG. 11, in the second embodiment, the step of controlling the RF energy so as to be able to transmit multi-frequency RF energy may include a heating section control step (S1310) of adjusting the RF energy along a high-frequency pulse train of a first frequency with a deep heating depth in the tissue, and a heating section control step (S1320) of adjusting the RF energy along a high-frequency train of a third frequency for heating fat cells.

[0065] The heating section control step (S1310) of adjusting the RF energy along a high-frequency pulse train of a first frequency with a deep heating depth in the skin tissue is executed to quickly heat the tissue to the treatment temperature initially. At this time, when the temperatures of the epidermis layer, dermis layer, and hypodermis rise above a certain temperature, the RF energy transfer efficiency to the deep fat layer increases. Therefore, the control unit increases the frequency of the first frequency so that the epidermis layer, dermis layer, hypodermis, and fat layer can be quickly raised to their respective treatment temperatures. At this time, the frequency of the first frequency in this step (S1310) can be shown to be higher than that in the step (S1320) described later.

[0066] The heating section control step (S1320) of adjusting the RF energy along a high-frequency train of a third frequency for heating fat cells corresponds to the step of adjusting the RF energy to maintain the tissue at the treatment temperature. The control unit can execute control to maintain the fat layer, which has a larger specific heat and a somewhat slower temperature rise than the epidermis layer or dermis layer, at the treatment temperature. As an example, the control unit can control the RF energy by increasing the frequency of selecting 13.56 MHz as the third frequency capable of selectively heating the fat layer. Here, the selective heating of the fat layer means that when transmitting RF energy at the third frequency, the RF energy absorption rate in the fat is higher than that in other layers of the skin tissue, and the fat layer is heated.

[0067] Ultimately, during the transmission of RF energy, the control unit can adjust the frequency of the selected frequency from among the multi-frequency RF energy at the initial and later stages to perform optimal treatment.

[0068] The control method for a treatment device for denaturing tissue using multi-frequency RF energy described with reference to FIGS. 10 and 11 above can be applied to a treatment device for denaturing tissue using multi-frequency RF energy which is the first embodiment of the present invention described with reference to FIGS. 1 to 9.

[0069] FIG. 12 is a flowchart of a treatment method for denaturing tissue using multi-frequency RF energy which is the third embodiment of the present invention.

[0070] Referring to FIG. 12, the treatment method for denaturing tissue which is the third embodiment of the present invention can include a step (S2100) of bringing an electrode into close contact with the skin, a step (S2200) of transmitting RF energy to the tissue, and a step (S2300) of transmitting the RF energy adjusted to a multi-frequency to the tissue to treat the fat layer.

[0071] The step (S2100) of bringing an electrode into close contact with the skin corresponds to a step of bringing an electrode into close contact with the tissue determined by the user to require treatment on the patient's skin. The user (or medical team) can select the portion determined to be necessary due to a change in facial shape and bring an electrode capable of transmitting RF energy into close contact with the skin.

[0072] The step (S2200) of transmitting RF energy to the tissue corresponds to a step of transmitting RF energy to the tissue by the user's operation with the electrode in close contact with the skin.

[0073] The step (S2300) of transmitting the RF energy adjusted to a multi - frequency to the tissue to treat the fat layer corresponds to the step of adjusting the portions heated by depth in the tissue while adjusting the frequency of the RF energy. The skin tissue is composed of an epidermis layer, a dermis layer, a hypodermis, and a fat layer, and the temperatures for treatment of each layer are different from each other. The epidermis layer and the dermis layer cause denaturation for tissue remodeling, and at this time, the temperature of the tissue for denaturation becomes 70 °C to 80 °C. On the other hand, the treatment of fat can be carried out by heating to 44 °C to 46 °C and maintaining for a predetermined time for the death of fat cells. This step (S2300) is carried out so as to prevent excessive damage to the epidermis layer and the dermis layer and maintain the fat layer at the treatment temperature. In this step, the multi - frequency can include a first frequency for heating the epidermis, dermis, and hypodermis, a second frequency for heating up to the dermis layer, and a third frequency for selectively heating the fat. In this step, the frequencies of the first frequency, the second frequency, and the third frequency can vary from each other depending on the treatment mode.

[0074] That is, in this step, in the initial treatment mode, the heating of the epidermis, dermis, and hypodermis can be carried out at a higher frequency, and in the late treatment mode, the heating frequency of the epidermis, dermis, and hypodermis can be lowered. Also, in the initial stage of treatment, the heating frequency of the fat layer can be lowered, and in the late stage of treatment, the heating frequency of the fat layer can be increased.

[0075] On the other hand, the third embodiment of the present invention can be repeatedly executed a plurality of times for treatment on the face. That is, the third embodiment of the present invention can be repeatedly executed while changing the region where the RF energy is transmitted.

[0076] FIG. 13 is a detailed flowchart of the third embodiment.

[0077] Referring to FIG. 13, in the third embodiment, the step (S2300) of transmitting the RF energy to the tissue to treat the fat layer may include a heating step (S2310) of increasing the frequency of selecting a frequency capable of heating to a deep portion within the tissue and a maintaining step (S2320) of increasing the frequency of selectively transmitting the RF energy to the fat cells within the tissue.

[0078] The heating step (S2310) of increasing the frequency of transmitting the RF energy to a deep portion within the tissue corresponds to the step of rapidly increasing the temperatures of the epidermis, dermis, and hypodermis in order to increase the transmission efficiency of the RF energy depending on the manner in which the RF energy is transmitted. At this time, the frequency can be divided into a first region of 1 to 3 MHz, a second region of 3 to 10 MHz, and a third region of 10 to 30 MHz. In this step, the frequency of selecting the RF energy within the first region and the second region is higher than the frequency selected within the third region.

[0079] The maintaining step (S2320) of increasing the frequency of transmitting the RF energy to the fat cells within the tissue corresponds to the step of increasing the frequency of the RF energy of the third frequency in order to maintain the temperature of the fat layer at the treatment temperature. Even when this step is executed, the RF energy of the first frequency and the second frequency can be repeatedly transmitted to maintain the temperatures of the epidermis, dermis, and hypodermis. On the other hand, the selection frequency of the third frequency in this step (S2320) is higher than that in the heating step (S2310).

[0080] On the other hand, the treatment method for denaturing the tissue described with reference to FIGS. 12 and 13 can be executed using the treatment device for denaturing the tissue using the multi-frequency RF energy according to the first embodiment of the present invention described with reference to FIGS. 1 to 9.

[0081] In the following embodiments, the control unit can select two frequencies and transmit RF energy of the selected frequencies to the tissue. In this case, the frequency region can be divided into a first region, a second region, and a third region according to its size.

[0082] In the following embodiments, the control unit can select a first frequency from the first region, the second region, or the third region, and select a second frequency from a region different from the first frequency. Further, the control unit can control the RF source to transmit RF energy of the selected first frequency to the electrode and transmit RF energy of the second frequency to the electrode.

[0083] FIG. 14 is a conceptual diagram showing a frequency range in the fourth embodiment of the present invention.

[0084] Referring to FIG. 14, a treatment device for modifying tissue using multi-frequency RF energy, which is the fourth embodiment of the present invention, can generate RF energy by adjusting the RF adjustment unit to a frequency selected from the first region, the second region, and the third region.

[0085] Here, the first region, the second region, and the third region, which are the frequency regions of RF energy, can have frequencies determined within 1 MHz to 10 GHz.

[0086] The second region adjusted by the RF adjustment unit is a region higher than the first region. Also, the third region is a region higher than the second region.

[0087] The sizes of the respective regions may be different from each other. As an example, the second region is wider than the first region. Also, the third region is wider than the second region.

[0088] Note that, as an example, the second region is 1.1 times or more the first region. Specifically, the second region is 1.1 times to 5 times the first region. On the other hand, the third region becomes 2 times or more the second region. Specifically, the third region is 2 times to 10 times the second region.

[0089] As an example, the first region can be from 1 MHz to 3 MHz, the second region can be from 3 MHz to 10 MHz, and the third region can be from 10 MHz to 2.45 GHz. In this case, the control unit can select 2 MHz as the first frequency and 6 MHz as the second frequency. In another example, the control unit can select 2 MHz as the first frequency and 13 MHz as the second frequency. In yet another example, the control unit can select 6 MHz as the first frequency and 13 MHz as the second frequency. However, the selected frequencies described above are just examples and may be selected within the first region, the second region, and the third region.

[0090] FIG. 15 is a diagram showing the pulse train of RF energy, the temperature of the tissue, and the driving time of the cooling unit in the fourth embodiment.

[0091] Referring to FIG. 15, in the fourth embodiment, the RF energy having a frequency within the first region can exhibit the deepest penetration depth in the skin tissue and can rapidly increase the temperature of the epidermis.

[0092] The RF energy having a frequency within the second region can rapidly increase the temperature of the dermis.

[0093] Also, the RF energy having a frequency within the third region can selectively heat the fat layer.

[0094] FIGS. 16a, 16b, and 16c are diagrams showing the frequencies constituting the pulse train of RF energy in the heating section in the fourth embodiment. In this embodiment, the control unit can control the RF source so as to increase the frequency of selecting the lower frequency from among two frequencies during the heating section.

[0095] Referring to FIG. 16a, in the present disclosure, the RF control unit can select a first frequency within a first region and a second frequency within a second region to adjust the RF energy. Specifically, when it is necessary to increase the skin temperature, the frequency of applying the RF energy of the first frequency can be increased.

[0096] Referring to FIG. 16b, in the present disclosure, the RF control unit can select a first frequency within a second region and a second frequency within a third region to adjust the RF energy. Specifically, when heating the skin epidermis as the target, the frequency of applying the RF energy of the second frequency can be increased.

[0097] Referring to FIG. 16c, in the present disclosure, the RF control unit can select a first frequency within a first region and a second frequency within a third region to adjust the RF energy. Specifically, when it is necessary to increase the skin temperature, the frequency of applying the RF energy of the first frequency can be increased.

[0098] On the other hand, in the present disclosure, the control unit can be controlled according to conditions, for example, so that the selection frequency in each region changes in the heating section and the maintenance section. At this time, the frequencies selected in each region may be the same, or may be adjusted differently within the same region.

[0099] FIGS. 17a, 17b, and 17c are diagrams showing the frequencies constituting the pulse train of the RF energy in the heating section in the fourth embodiment.

[0100] FIGS. 17a, 17b, and 17c are diagrams showing the frequencies constituting the pulse train of the RF energy in the maintenance section in the fourth embodiment. In this embodiment, the control unit may control the RF adjustment unit so as to increase the frequency of selecting the higher frequency from among the two frequencies during the holding period.

[0101] Referring to FIG. 17a, the control unit can control the RF source to maintain a high temperature without rapidly increasing the skin temperature. At this time, the control unit can select the first frequency in the first region and the second frequency in the second region.

[0102] Specifically, the control unit can control the RF source to increase the frequency of applying the RF energy of the second frequency in order to maintain the skin temperature at a predetermined temperature.

[0103] Referring to FIG. 17b, the control unit can select the first frequency within the first region and the second frequency within the third region. Specifically, the control unit can increase the frequency of applying the RF energy of the second frequency while maintaining the temperature of the skin tissue.

[0104] Referring to FIG. 17c, the RF adjustment unit can select the first frequency within the third region and the second frequency within the third region. Specifically, the control unit can increase the frequency of applying the RF energy of the second frequency while maintaining the temperature of the skin tissue.

[0105] FIGS. 18a, 18b, and 18c are diagrams showing modified examples of the pulse train of the RF energy in the heating section in the fourth embodiment.

[0106] Referring to FIGS. 18a, 18b, and 18c, the fourth embodiment according to the present disclosure is configured such that the control unit can adjust the pulse width of the RF energy. The control unit selects the first frequency and the second frequency from two regions in the heating section and controls the RF source to generate the RF energy of the selected frequency.

[0107] The control unit can increase the pulse width for transmitting the RF energy at the frequency selected from the smaller region among the two selected regions so that rapid heating can be performed in the heating section.

[0108] Referring to FIG. 18a, the control unit can select the first frequency within the first region and the second frequency within the second region during the heating period. Specifically, the control unit can control the RF source so that the frequencies of generating the RF energy of the first frequency or the RF energy of the second frequency are similar. However, the control unit can increase the pulse width when transmitting the RF energy of the first frequency during the heating period.

[0109] Referring to FIG. 18b, the control unit can select the first frequency within the second region and the second frequency within the third region during the heating period. Specifically, the control unit can control the RF source so that the frequencies of generating the RF energy of the first frequency or the RF energy of the second frequency are similar. However, the control unit can increase the pulse width when transmitting the RF energy of the first frequency during the heating period.

[0110] Referring to FIG. 18c, the control unit can set the first frequency within the first region and select the second frequency within the third region during the heating period. Specifically, the control unit can control the RF source so that the frequencies of generating the RF energy of the first frequency or the RF energy of the second frequency are similar. However, the control unit can equally control the frequencies at which the frequency is selected in the first region or the third region during the heating period. However, the control unit can increase the pulse width when transmitting the RF energy of the first frequency during the heating period.

[0111] FIG. 19 is a flowchart of a control method of a treatment device for modifying tissue using multi-frequency RF energy according to a fifth embodiment of the present invention.

[0112] Referring to FIG. 19, a control method for a treatment device for modifying tissue using multi-frequency RF energy according to a fifth embodiment of the present invention can include a step of generating RF energy (S3100), a step of transmitting the RF energy to an electrode (S3200), a heating section control step of adjusting the RF energy (S3300), and a maintenance section control step (S3400).

[0113] The step of generating RF energy (S3100) and the step of transmitting the RF energy to the electrode (S3200) can be executed in the same manner as in the second embodiment described above.

[0114] In this embodiment, the heating section control step (S3300) is configured to be able to adjust the RF energy along a pulse train with a high frequency of a small frequency among the multi-frequencies. The multi-frequency can be selected from within the first region, the second region, or the third region.

[0115] The selection of the multi-frequency in the heating section control step (S3300) can be performed in two regions. This step (S3300) can transmit the RF energy while changing to frequencies selected from two different regions. At this time, the control unit can select the first frequency in the first region and the second frequency in the second region. The control unit can control the RF source to generate the RF energy of the first frequency and then generate the RF energy of the second frequency.

[0116] Also, the control unit can select the first frequency within the first region and the second frequency within the third region, or select the first frequency within the second region and the third frequency within the third region.

[0117] Also, the control unit selects the first frequency within the third region and the second frequency within the second region, or selects the first frequency within the second region and the second frequency within the first region. The first frequency can be selected within the third region and the second frequency can be selected within the first region.

[0118] Also, in the fifth embodiment, a pulse train for a frequency is configured so as to be able to transmit RF energy of a first frequency and a second frequency selected in each region, and the RF energy can be controlled according to the pulse train.

[0119] The heating period control step (S3300) can be controlled so as to increase the frequency of selecting the first frequency when the first frequency is selected within the first region and the second frequency is selected within the second region.

[0120] Also, the heating period control step (S3300) can increase the frequency of selecting the first frequency when the first frequency is selected within the second region and the second frequency is selected within the third region.

[0121] Also, the heating period control step (S3300) can increase the frequency of selecting the first frequency when the first frequency is selected within the first region and the second frequency is selected within the third region.

[0122] The maintenance period control step (S3400) is configured so as to be able to adjust the RF energy along a pulse train having a high frequency among the multi-frequencies. The first frequency or the second frequency can be selected within the first region, the second region, or the third region.

[0123] The maintenance period control step S3400 can be controlled so as to increase the frequency of selecting the second frequency when the first frequency is selected within the first region and the second frequency is selected within the second region.

[0124] Also, the holding period control step S3400 may be controlled so as to increase the frequency of selecting the second frequency when the first frequency is selected within the second region and the second frequency is selected within the third region.

[0125] Further, when the first frequency is selected within the first region and the second frequency is selected within the third region, the holding period control step S3400 may be controlled to increase the frequency of selecting the second frequency.

[0126] FIG. 20 is a flowchart of a treatment method for modifying tissue using multi-frequency RF energy according to a sixth embodiment of the present invention.

[0127] Referring to FIG. 20, a treatment method for modifying tissue using multi-frequency RF energy according to a sixth embodiment of the present invention includes a step (S4100) of bringing an electrode for transmitting RF energy into close contact with skin tissue, a heating step (S4200) of increasing the frequency of selection of a multi-frequency medium and low frequency to heat the tissue to a treatment temperature, and a maintaining step (S4300) of increasing the frequency of selection of a multi-frequency high and medium frequency to maintain the heated tissue at the treatment temperature.

[0128] The heating step S4200 and the maintaining step S4300 can be performed by selecting from two regions and adjusting the RF energy to the selected frequency.

[0129] The heating step (S4200) is configured to adjust the RF energy along a pulse train having a high frequency of a small frequency among the multi-frequencies so as to heat the tissue. As the multi-frequency, the first frequency or the second frequency can be selected within the first region, the second region, or the third region.

[0130] In this case, the adjustment from the first frequency to the second frequency can follow the tendency of increasing frequency.

[0131] Conversely, the adjustment from the first frequency to the second frequency can follow the tendency of decreasing frequency.

[0132] In addition, the sixth embodiment can heat tissue by constructing a pulse train to change to a frequency selected from each region and transmitting RF energy adjusted by the pulse train.

[0133] The heating step (S4200) can heat the tissue to the treatment temperature by increasing the frequency of selecting the first frequency when the first frequency is selected within the first region and the second frequency is selected within the second region.

[0134] In addition, the heating step (S4200) can heat the tissue to the treatment temperature by increasing the frequency of selecting the first frequency when the first frequency is selected within the second region and the second frequency is selected within the third region.

[0135] In addition, the heating step S (S4200) can heat the tissue to the treatment temperature by increasing the frequency of selecting the frequency within the first region when the first frequency is selected within the first region and the second frequency is selected within the third region.

[0136] In this embodiment, the maintaining step (S4300) adjusts the RF energy along a high pulse train with a high frequency among the multi - frequencies to maintain the tissue at the treatment temperature. The first frequency or the second frequency can be selected within the first region, the second region, or the third region.

[0137] The maintaining step S (S4300) can increase the frequency of selecting the second frequency when the first frequency is selected within the first region and the second frequency is selected within the second region.

[0138] In addition, the maintaining step (S4300) can increase the frequency of selecting the second frequency when the first frequency is selected within the second region and the second frequency is selected within the third region.

[0139] In addition, the maintenance step (S4300) can increase the frequency of selecting the second frequency when the first frequency is selected within the first region and the second frequency is selected within the third region.

[0140] As described above, the treatment device for denaturing tissue using multi-frequency RF energy according to the present invention, its control method, and the treatment method using the same utilize RF energy of a large number of frequencies with different energy transfer depths in the tissue to perform skin treatment, and thus have the effect of increasing the treatment efficiency.

Explanation of reference numerals

[0141] 100 Electrode 500 Control unit

Claims

1. a body including an RF source; a handpiece connected to the main body and having an electrode on one side for transmitting RF energy transmitted from the RF source to the skin; and A therapeutic device for modifying tissue using RF energy, the device including a controller for controlling the RF source to deliver multi-frequency RF energy to the electrodes.

2. The control unit is 10. The therapeutic device for modifying tissue using RF energy as recited in claim 1, wherein said RF source is controlled to generate RF energy of a first frequency or RF energy of a second frequency.

3. The front control section is 3. The therapeutic device for modifying tissue using RF energy as recited in claim 2, wherein the first frequency and the second frequency are selected in a first region, a second region, or a third region.

4. 4. The therapeutic device for modifying tissue utilizing RF energy as recited in claim 3, wherein said second region is larger than said first region.

5. 5. The therapeutic device for modifying tissue utilizing RF energy as recited in claim 4, wherein said third region is larger than said second region.

6. 6. The therapeutic device for modifying tissue using RF energy as recited in claim 5, wherein said second region is 1.1 to 5 times larger than said first region.

7. 7. The therapeutic device for modifying tissue utilizing RF energy as recited in claim 6, wherein said third region is 2 to 10 times larger than said second region.

8. The control unit is 3. The treatment device for modifying tissue using RF energy as claimed in claim 2, wherein the time during which the RF energy is transmitted is controlled by dividing it into a heating section and a maintenance section.

9. The treatment device for denaturing tissue using RF energy according to claim 8 , wherein the control unit increases a frequency of selecting a frequency in a region having a lower frequency out of the two selected regions in the heating section.

10. The treatment device for denaturing tissue using RF energy according to claim 8 , wherein the control unit increases a frequency of selecting a frequency within a region with a higher frequency out of the two selected regions during the maintenance period.

11. The control unit is 9. A treatment device for degenerating tissue using RF energy as described in claim 8, wherein the pulse width for transmitting the RF energy at the selected frequency is controlled to be increased in the region having the lower frequency of the two selected regions in the heating section.

12. generating RF energy from an RF generator; transmitting said RF energy to an electrode; and A method of controlling a therapeutic device for modifying tissue using RF energy comprising controlling said RF energy at multiple frequencies.

13. 13. The method of claim 12, wherein the step of controlling the RF energy comprises transmitting RF energy of a first frequency and transmitting RF energy of a second frequency.

14. 14. The method of claim 13, wherein the step of controlling the RF energy comprises selecting the first and second frequencies within a first region, a second region and a third region.

15. 15. The method of claim 14, wherein the step of controlling the RF energy comprises selecting the first frequency in the first region and selecting the second frequency in the second region, selecting the first frequency in the second region and selecting the second frequency in the third region, or selecting the first frequency in the first region and selecting the second frequency in the third region.

16. 15. The method of claim 14, wherein the step of controlling the RF energy comprises selecting the first frequency in the third region and selecting the second frequency in the second region, selecting the first frequency in the second region and selecting the second frequency in the first region, or selecting the first frequency in the third region and selecting the second frequency in the first region.

17. 15. The method of claim 14, wherein the step of controlling the RF energy includes a heating section control step of controlling the RF energy according to a pulse train having a high frequency of a smaller frequency among the selected multiple frequencies.

18. 15. The method of claim 14, wherein the step of controlling the RF energy includes a sustain interval control step of adjusting the RF energy according to a pulse train having a high frequency of a larger frequency among the selected multiple frequencies.

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