Monopole radio frequency skin treatment method and device and electronic equipment

Abstract

The invention relates to the field of radio frequency heating, and provides a single-pole radio frequency skin treatment method and device and electronic equipment. The method comprises the following steps: calculating the thermal relaxation time of a target tissue heated by radio frequency; based on the thermal relaxation time of the target tissue, determining that the pulse width of radio frequency heating does not exceed 5 times of the thermal relaxation time, and determining that the duty ratio is not higher than 70%; based on the determined pulse width and duty cycle, a target tissue is RF heated, the target tissue comprising a fibrous network of facial skin tissue. The scheme is used for solving the defect of low energy utilization rate caused by the fact that most energy acts on tissues around the collagen when the collagen is subjected to radio frequency heating in the prior art. According to the scheme, by setting the pulse width and the duty ratio of the radio frequency, the heating efficiency of the target tissue (namely a fiber network of skin tissue, namely a collagen enrichment region, such as fibrous septum, fascia and retained ligament) can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of radio frequency heating, in particular to a monopolar radio frequency skin treatment method and device and electronic equipment. BACKGROUND

[0002] Radio frequency (RF) energy exposure is a popular non-invasive method for heating skin and skin tissue.

[0003] Medical radio frequency devices generally have a frequency of 100 kHz-100 MHz. When treating skin with radio frequency, there are monopolar, bipolar, and multipolar radio frequency, among which the monopolar radio frequency has the best effect, which is monopolar loop volumetric heating. Although volumetric heating is the most scientific heating method, the energy utilization rate is low for the effect of tightening. When heating collagen, a large part of the energy acts on the tissue around the collagen, so that in order to improve the efficiency of heating collagen, the heating energy and the overall temperature must be increased, thereby causing strong pain and discomfort. SUMMARY

[0004] The present application provides a monopolar radio frequency skin treatment method and device, and electronic equipment to solve the defect of low energy utilization rate when heating collagen with radio frequency in related technologies. By setting the pulse width and duty cycle of radio frequency heating based on the thermal relaxation time of the target tissue, the heating efficiency for the target tissue (i.e. the fiber network of the skin tissue, which is the collagen-rich area, such as the fiber interval, fascia, and retaining ligament) can be improved.

[0005] The present application provides a monopolar radio frequency skin treatment method, comprising:

[0006] calculating the thermal relaxation time of the target tissue of radio frequency heating;

[0007] based on the thermal relaxation time of the target tissue, determining that the pulse width of radio frequency heating is not more than 5 times the thermal relaxation time, and determining that the duty cycle is not higher than 70%;

[0008] based on the determined pulse width and duty cycle, performing radio frequency heating on the target tissue, the target tissue including a fiber network of skin tissue, the fiber network including a fiber interval and a fascia.

[0009] According to the monopolar radio frequency skin treatment method provided by the present application, radio frequency pulses are applied to the target tissue for radio frequency heating, the radio frequency pulses including pulses with a set pulse width, a set duty cycle, and a set number of pulse sequence sub-pulses.

[0010] The set pulse width is not higher than 200 milliseconds; the set duty cycle is not higher than 70%; and the target tissue includes a fiber network of skin tissue, the fiber network including a fiber interval and a fascia.

[0011] According to the monopolar radio frequency skin treatment method provided by the application, the pulse width is set to 10-100 ms;

[0012] The duty cycle is not higher than 60%.

[0013] According to the monopolar radio frequency skin treatment method provided by the application, the target tissue includes a fiber network of facial skin, and the fiber network includes fiber intervals and fascia.

[0014] According to the monopolar radio frequency skin treatment method provided by the application, the pulse width, the duty cycle and the number of sub-pulses of the pulse sequence are set to satisfy the following formula:

[0015] 0.6 s≤pulse width×(duty cycle+100%)×number of sub-pulses≤1.3 s.

[0016] According to the monopolar radio frequency skin treatment method provided by the application, the radio frequency pulse sequence includes a first pulse sequence and a second pulse sequence;

[0017] The set pulse width of the second pulse sequence is not higher than 200 ms, the set duty cycle is not higher than 70%, and the set number of sub-pulses of the pulse sequence is not less than 2;

[0018] The set pulse width of the first pulse sequence is higher than that of the second pulse sequence;

[0019] The set pulse duty cycle of the first pulse sequence is lower than that of the second pulse sequence.

[0020] According to the monopolar radio frequency skin treatment method provided by the application, the average voltage of the sub-pulse of the first pulse sequence is not higher than 80% of the voltage of the sub-pulse of the second pulse sequence.

[0021] According to the monopolar radio frequency skin treatment method provided by the application, the power of the radio frequency pulse is 50-500 W, and the frequency of the radio frequency pulse is 100 kHz-10 MHz.

[0022] According to the monopolar radio frequency skin treatment method provided by the application, the power of the radio frequency pulse is 50-500 W, and the frequency of the radio frequency pulse is 100 kHz-10 MHz

[0023] The application also provides a monopolar radio frequency skin treatment device applied to any one of the monopolar radio frequency skin treatment methods, which comprises a control panel and a radio frequency output unit.

[0024] The control panel is used for receiving external control instructions, and sending the control instructions to the radio frequency output unit, the control instructions being used for adjusting the pulse width and the duty cycle of the radio frequency pulse;

[0025] The radio frequency output unit is used for outputting the radio frequency pulse with the set pulse width and the set duty cycle based on the control instructions.

[0026] The control panel is also used for displaying the energy density or energy of the radio frequency pulse corresponding to the control instructions.

[0027] The application further provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the monopolar radio frequency skin treatment method as described above when executing the program.

[0028] The application further provides a non-transitory computer readable storage medium, which stores a computer program, and the computer program is executable on the processor to implement the monopolar radio frequency skin treatment method as described above.

[0029] The application further provides a computer program product, which includes a computer program, and the computer program is executable on the processor to implement the monopolar radio frequency skin treatment method as described above.

[0030] In the monopolar radio frequency skin treatment method, the pulse width and the duty cycle with the highest radio frequency heating efficiency on the target tissue are calculated by calculating the thermal relaxation time, and the pulse width and the duty cycle of the radio frequency pulse signal can be further adjusted based on the calculation result, so that the selective heating effect of the radio frequency pulse is utilized to improve the heating efficiency of the radio frequency pulse on the target tissue. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0032] Figure 1 is a flowchart of the monopolar radio frequency skin treatment method provided by the embodiment of the present application;

[0033] Figure 2 is a schematic diagram of the facial skin tissue structure provided by the embodiment of the present application;

[0034] Figure 3 is a schematic diagram of the principle of radio frequency selective heating provided by the embodiment of the present application;

[0035] Figure 4 is a comparative schematic diagram of radio frequency non-selective heating provided by an embodiment of the present invention;

[0036] Figure 5 This is one of the waveform diagrams of the radio frequency pulse provided by an embodiment of the present invention;

[0037] Figure 6 This is the second waveform diagram of the radio frequency pulse provided by the embodiment of the present invention;

[0038] Figure 7 This is the third waveform diagram of the radio frequency pulse provided by the embodiment of the present invention;

[0039] Figure 8 This is the fourth waveform diagram of the radio frequency pulse provided by an embodiment of the present invention;

[0040] Figure 9 This is the fifth waveform diagram of the radio frequency pulse provided by the embodiment of the present invention;

[0041] Figure 10 It is a schematic diagram of the physical structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0043] Figure 1 FIG. 1 is a flow chart of a monopolar radiofrequency skin treatment method according to an embodiment of the present invention. Figure 1 As shown, this embodiment provides a monopolar radiofrequency skin treatment method, including:

[0044] Step 101, calculating the thermal relaxation time of the target tissue heated by radiofrequency heating;

[0045] RF heating is mainly targeted at heating the fibrous network of the skin and skin tissue. The fibrous network is mainly composed of fine collagen fiber grid (fiber spacing) and fascia, and the subcutaneous fat is composed of fine collagen fiber grid (fiber spacing) and fat cell clusters. These structures have different structural, electrical and thermal properties, which affect the distribution and deposition of RF energy. The electrical conductivity of the fibrous network is higher than that of fat, which causes the current to flow preferentially through the fibrous network, resulting in higher power absorption and temperature in the fibrous network, and achieving selective heating. This helps to denature collagen and locally shrink fat, while protecting the surrounding fat tissue. To achieve selective heating of the target tissue (i.e. the fibrous network), according to anatomy, the collagen content of the fibrous network (including fiber spacing and fascia) of the facial skin is higher than that of other parts, and the width of the facial fiber spacing is mostly 50-250 microns, and the thickness of the fascia can reach 200-500 microns.

[0046] Figure 2 is a schematic diagram of the facial skin tissue structure provided by an embodiment of the present application.

[0047] As shown in Figure 2 , the facial skin is composed of epidermis, dermis and skin tissue, and the fibrous network (including fiber spacing and fascia) is distributed in the skin tissue. The fiber spacing is a fine collagen fiber grid, usually with a diameter of 10-1000 microns (mainly 50-250 microns in the face), and the fascia is a deep collagen fiber layer, with a thickness of 200-500 microns. The electrical conductivity of the fibrous network is relatively high (0.308 S / m), and compared with the fat cell cluster (diameter about 2000 microns, electrical conductivity 0.025 S / m), it preferentially absorbs RF energy and achieves selective heating.

[0048] Figure 3 is a schematic diagram of the principle of RF selective heating provided by an embodiment of the present application.

[0049] Figure 4 is a schematic diagram of the principle of RF non-selective heating provided by an embodiment of the present application.

[0050] As shown in Figure 3 and Figure 4As shown, similar to selective heating of light of laser, radio frequency heating of tissue also has selective heating effect, mainly for the fiber network (including dermis, fibrous septa, fascia and ligament) with high collagen content. The heat of the fiber network is diffused to the surrounding tissue due to heat conduction. To maximize the thermal confinement during treatment, the key is that the pulse width of radio frequency must be shorter than the thermal relaxation time (TRT) of the target tissue. Only in this way, after the target tissue absorbs the radio frequency energy, the thermal energy has not enough time to release and diffuse to the surrounding tissue, so as to avoid damage to the surrounding tissue. When the energy of radio frequency is large enough, the target tissue will have slight thermal denaturation, while the temperature of the surrounding tissue is not enough to have thermal denaturation, so as to realize thermal stimulation of collagen regeneration.

[0051] In the implementation, the diameter of the target tissue, i.e. the fiber network (taking the fibrous septum as an example) of the face, can be 10-1000 microns, preferably 100-300 microns, while avoiding damage to the surrounding adipose tissue. In this embodiment, the principle of thermal relaxation time (TRT) is used to optimize the pulse width and duty cycle of radio frequency.

[0052] Specifically, the thermal relaxation time refers to the time required for the temperature of the target tissue to drop by 50%. For fibrous septum and fascia, it is a thin film or layer structure, so the plane TRT formula can be used: TRT≈d 2 / (4α), where d is the diameter; for adipose tissue (adipocyte cluster), the spherical TRT formula is used: TRT≈d 2 / (24α). α=k / (p×c), k is thermal conductivity, p is density, and c is specific heat capacity.

[0053] In practical application, the thermal conductivity (k) of the target tissue fiber network can be 0.53 W / m·K, the density (p) can be 1200 kg / m 3 , and the specific heat capacity (c) can be 3800 J / kg·K. Based on this, the thermal diffusion coefficient α=0.53 / (1200×3800)≈1.16×10-7m 2 / s can be determined.

[0054] The thermal conductivity (k) of the adipose tissue is 0.16 W / m·K, the density (p) is 850 kg / m3, and the specific heat capacity (c) is 2300 J / kg·K. Based on this, the thermal diffusion coefficient α=0.16 / (850×2300)≈8.18×10-8m 2 / s of the adipose tissue can be calculated and determined.

[0055] For example, for a fiber spacing of 200 microns, TRT ~ 86 milliseconds, for a fiber spacing of 300 microns, TRT ~ 194 milliseconds. For a fascia thickness of 200-500 microns, TRT ~ 86-538 milliseconds. In general, for a fiber network of 10 microns to 1000 microns (mainly fiber spacing, similar fascia thickness), its TRT varies from 0.22 milliseconds to 2151 milliseconds. Small size fiber network (200-300 microns) heat diffuses faster, suitable for shorter pulses; large size fiber network (800-1000 microns) heat retention time is long, and requires a wider pulse. The TRT of adipose tissue is about 2036 milliseconds, which is much larger than the small size fiber spacing, indicating that the heat retention time of adipose tissue is long and easy to accumulate heat.

[0056] In step 102, based on the thermal relaxation time of the target tissue, the pulse width of the radio frequency heating is determined to be no more than 5 times the thermal relaxation time, and the duty cycle is determined to be no higher than 60%;

[0057] Based on the above calculation, the pulse width of the radio frequency heating should be close to or less than 3 to 5 times the TRT of the fiber network (close to or less than the TRT of the fiber network is the most ideal case, that is, the heat is almost entirely concentrated in the fiber network, and the pulse width is extended to 3 to 5 times the TRT, although the heat diffuses to the adipose tissue, the impact on the adipose tissue does not cause thermal damage, and it is also within the effective and safe range), to concentrate heat on the fiber network and stimulate collagen regeneration. At the same time, the pulse width should be much smaller than the TRT of the adipose tissue (2036 milliseconds), to avoid heat accumulation in the adipose tissue and protect non-target tissues. The duty cycle needs to be optimized (<70%, preferably <60%), to ensure that the pulse gap is long enough (> TRT / 2) to allow the fiber network to cool down partially and reduce heat diffusion to the adipose tissue.

[0058] In step 103, based on the determined pulse width and duty cycle, the target tissue is subjected to radio frequency heating, the target tissue including a fiber network of facial skin tissue, the fiber network including fiber spacing and fascia.

[0059] In summary, for a fiber network of 50 microns or more and 250 microns or less (mainly fiber spacing), a pulse width of no more than 200 milliseconds and a duty cycle of no more than 70% can achieve efficient radio frequency heating of the target tissue. Preferably, for this size range, the pulse width is 10-100 milliseconds, and the duty cycle can be 10%-60%.

[0060] For pulse width and duty cycle of fiber networks of other diameters, see Table 1 below, and a pulse width of no more than 5 times the thermal relaxation time is considered acceptable (this table is based on TRT formula calculation and is only an example, and the actual value can be adjusted according to specific conditions):

[0061] Table 1: Correspondence table of fiber network and pulse width and duty cycle

[0062]

[0063] In practical applications, if the pulse width is too small, the temperature may not reach the therapeutic effect, so part of the data in the table can be adjusted according to the actual situation.

[0064] In the exemplary embodiment, the power of the radio frequency can also be limited to be higher than 50W, and the narrow pulse is conducive to selective heating, and high energy is conducive to rapid accumulation of energy to the target tissue (fiber network of skin tissue), and the combination of the two is more conducive to rapid accumulation of energy in the dermis layer with rich collagen, fiber spacing and fascia layer, and reduces the impact on the surrounding tissue. At the same time, the energy is limited to be no higher than 500W to prevent the risk of scalding.

[0065] In the exemplary embodiment, the frequency of the radio frequency can also be limited to be between 100kHz-10MHz to balance the heating efficiency of the target tissue and patient comfort. The frequency is not lower than 100kHz to avoid nerve stimulation pain, and the frequency is not higher than 10MHz to avoid overheating of the surface tissue.

[0066] In the exemplary embodiment, the radio frequency pulse includes a plurality of different pulse sequences, the plurality of pulse sequences have different pulse widths and duty cycles, and each pulse sequence contains no less than 2 sub-pulses. The pulse width of the subsequent pulse sequence is not higher than 200 milliseconds, and the duty cycle of the subsequent pulse sequence is not higher than 70%. The pulse width of the previous pulse sequence is greater than the pulse width of the subsequent pulse sequence, the duty cycle of the previous pulse sequence is lower than the duty cycle of the subsequent pulse sequence, and the average voltage of the previous pulse sequence is not higher than 80% of the voltage of the subsequent pulse sequence. This can make the previous pulse sequence perform radio frequency heating on the skin, so that the overall temperature of the heated tissue rises a little, and the subsequent pulse sequence performs selective heating after the skin basic temperature rises, thereby improving the heating efficiency of the target tissue. At the same time, the voltage of the previous pulse sequence is limited to slowly rise to prevent stimulation of the skin.

[0067] wherein Figure 5 The most preferred embodiment of the present application is as follows: Figure 5As shown, the pulse width and interval are 125 milliseconds, and the radio frequency sequence sub-pulse 7-15, the first two sub-pulse width is 100 milliseconds, interval 25 milliseconds (duty cycle 100 / 125); the third sub-pulse width is 70-90 milliseconds, duty cycle 70 / 125 to 90 / 125; the last 4-12 sub-pulse, pulse width 55 milliseconds, duty cycle 55 / 125; the energy of the first 3 sub-pulses and the energy of the last sub-pulses are approximately the same, which is reflected in the voltage, that is, the voltage of the first 3 sub-pulses is obviously lower than that of the last sub-pulses. By heating the wide sub-pulse first, the efficiency of selective heating can be improved, and the skin can be prevented from being stimulated.

[0068] Figure 6 As shown, the waveform diagram when all the radio frequency pulses with pulse width of 10-200 milliseconds and duty cycle <70% are used for heating.

[0069] Figure 7 As shown, the sub-pulse width is different in the single radio frequency energy output, the duty cycle of the narrow pulse part is <70% (preferably ≤60%), the duty cycle of the front wide sub-pulse is higher than that of the rear narrow sub-pulse, and the voltage is equal (the energy is higher than that of the rear sub-pulse). In this way, the first few wide sub-pulses can quickly accumulate energy to increase the overall temperature, and then selective heating is achieved through narrow pulses to improve energy utilization efficiency.

[0070] Figure 8 As shown, the sub-pulse voltage (peak-to-peak value) is different in the single radio frequency energy output, the duty cycle of the front wide sub-pulse is higher than that of the rear narrow sub-pulse, and the peak-to-peak value of the front wide sub-pulse is lower than that of the rear narrow sub-pulse (the energy of each sub-pulse is approximately the same), which realizes slow heating and avoids thermal stimulation caused by rapid temperature change.

[0071] Figure 9 As shown, the sub-pulse voltage in the single pulse energy output is from low to high (the energy of each sub-pulse is approximately the same), and the duty cycle is from high to low and then unchanged, which realizes slow heating and avoids thermal stimulation caused by rapid temperature change.

[0072] A comparative test is provided below to verify the effectiveness of the radio frequency skin treatment method proposed in the present application.

[0073] In the comparative test, the diameter of the fiber network (mainly based on fiber spacing) is 50-250 microns, and the conductivity is 0.308 S / m; the diameter of the fat group is about 2000 microns, and the conductivity is 0.025 S / m. The total current in the test is 3A, and according to the conductivity, it can be determined that the current of the fiber network is about 2.7A, and the current of the fat group is about 0.3A.

[0074] The duty cycle can be 70%, and the pulse width of the radio frequency pulse is 50 milliseconds and 200 milliseconds, respectively.

[0075] Table 2 Table of volume and mass relationship of fiber network and fat

[0076] Fiber diameter (pm) Fiber volume (m 3 ) Fat volume (mL 3 ) Fiber mass (kg) Fat mass (kg) 50 1.18 x 10 -8 ]] 3.99 x 10 -6 ]] 1.41 x 10 -5 ]]> 3.39 x 10 -3 ]]> 100 4.71 x 10 -8 ]] 3.95 x 10 -6 ]] 5.65 x 10 -5 ]] 3.36 x 10 -3 ]]> 150 1.06 x 10 -8 ]]> 3.89 x 10 -6 ]] 1.27 x 10 -4 ]]> 3.31 x 10 -3 ]]> 200 1.88 x 10 -8 ]]> 3.81 x 10 -6 ]]> 2.26 x 10 -4 ]] 3.24 x 10 -3 ]] 250 2.95 x 10 -8 ]] 3.71 x 10 -6 ]] 3.53 x 10 -4 ]] 3.15 x 10 -3 ]]>

[0077] Table 3 Table of resistance, current and power relationship of fiber network and fat

[0078] Fiber diameter (pm) R_fiber (Ω) R_fat (Ω) I_fiber (A) I_fat (A) P_fiber (W) P_fat (W) 50 27597 1003 0.106 2.894 310 8400 100 6899 1012 0.398 2.602 1092 6856 150 3066 1027 0.811 2.189 2015 4922 200 1725 1049 1.271 1.729 2786 3136 250 1104 1079 1.726 1.274 3290 1750

[0079] Table 4 Comparison table of temperature rise when pulse width is 50 milliseconds

[0080] Fiber diameter (pm) Fiber temperature rise (°C) Fiber final temperature (°C) Fat temperature rise (°C) Fat final temperature (°C) 50 0.81 36.81 1.73 37.73 100 2.72 38.72 1.42 37.42 150 4.01 40.01 1.03 37.03 200 5.55 41.55 0.66 36.66 250 6.57 42.57 0.37 36.37

[0081] Table 5 Comparison table of temperature rise when pulse width is 200 milliseconds

[0082] Fiber diameter (pm) Fiber temperature rise (°C) Fiber final temperature (°C) Fat temperature rise (°C) Fat final temperature (°C) 50 2.68 38.68 5.77 41.77 100 4.09 40.09 4.70 40.70 150 8.06 44.06 3.45 39.45 200 11.14 47.14 2.20 38.20 250 13.16 49.16 1.22 37.22

[0083] Based on the above tables 2-5, it can be determined that:

[0084] 1. The TRT of the fiber network increases with the diameter (5.38-134.48 milliseconds), and the fat is fixed at 2036 milliseconds. The short pulse width (50 milliseconds) matches the fiber TRT, and the heating efficiency is high; the long pulse width (200 milliseconds) approaches the TRT of larger fibers (d=200-250 μm), and the temperature rise is significant.

[0085] 2. The fiber volume is small (0.3-7.4%), the mass is low, and the temperature rise is fast; the fat volume is large, and the temperature rise is slow.

[0086] 3. The fiber conductivity is high (0.308 S / m), the current distribution is high (90%), and the power is moderate; the fat power is high (due to large current), and the long pulse width leads to high temperature rise.

[0087] 4. For a 50 millisecond pulse width: fiber temperature rise 0.81-6.57℃, fat 0.37-1.73℃, strong selectivity, and good fat protection. For a 200 millisecond pulse width: fiber temperature rise 2.68-13.16℃, fat 1.22-5.77℃, high risk of fat heat accumulation.

[0088] In summary, by applying a pulse width of 10 milliseconds to 200 milliseconds and a duty cycle of ≤70%, a high heating effect can be achieved for fiber spacing without damaging the surrounding fat.

[0089] Figure 10 An example of a schematic diagram of the physical structure of an electronic device is shown in Figure 10As shown, the electronic device can include a processor 1010, a communication interface 1020, a memory 1030, and a communication bus 1040, wherein the processor 1010, the communication interface 1020, and the memory 1030 can communicate with each other through the communication bus 1040. The processor 1010 can invoke the logical instructions in the memory 1030 to execute the radio frequency skin treatment method, which includes: calculating a thermal relaxation time of a target tissue heated by radio frequency; determining a pulse width and a duty cycle of the radio frequency heating based on the thermal relaxation time of the target tissue; and performing radio frequency heating on the target tissue based on the determined pulse width and duty cycle.

[0090] In addition, the logical instructions in the memory 1030 described above can be implemented in the form of a software function unit and sold or used as an independent product, which can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0091] On the other hand, the present application also provides a computer program product, which includes a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and the computer program can be executed by a processor to enable a computer to execute the radio frequency skin treatment method provided by the above-mentioned methods, which includes:

[0092] calculating a thermal relaxation time of a target tissue heated by radio frequency;

[0093] determining a pulse width and a duty cycle of the radio frequency heating based on the thermal relaxation time of the target tissue;

[0094] performing radio frequency heating on the target tissue based on the determined pulse width and duty cycle.

[0095] In another aspect, the present application also provides a non-transitory computer readable storage medium, which stores a computer program, the computer program is executed by a processor to implement the radio frequency skin treatment method provided by the above-mentioned methods, which includes:

[0096] calculating a thermal relaxation time of a target tissue heated by radio frequency;

[0097] determining a pulse width and a duty cycle of the radio frequency heating based on the thermal relaxation time of the target tissue;

[0098] Based on the determined pulse width and the duty cycle, the target tissue is radiofrequency heated.

[0099] The device embodiments described above are merely illustrative, wherein the units illustrated as separate components can or can not be physically separate, and the components illustrated as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0100] Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software and the necessary general hardware platform, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods of the various embodiments or some parts of the embodiments.

[0101] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A monopolar radiofrequency skin treatment method, characterized in that: include: Calculate the thermal relaxation time of the target tissue heated by radiofrequency; Based on the thermal relaxation time of the target tissue, determining that the pulse width of the radiofrequency heating does not exceed 5 times the thermal relaxation time, and determining that the duty cycle is not higher than 70%; Based on the determined pulse width and duty cycle, radiofrequency heating is performed on the target tissue, wherein the target tissue includes a fiber network of skin tissue, wherein the fiber network includes fiber septa and fascia.

2. Monopolar radiofrequency skin treatment method, characterized in that, Applying a radiofrequency pulse sequence to perform radiofrequency heating on the target tissue, the radiofrequency pulse sequence including pulses with a set pulse width, a set duty cycle, and a set number of sub-pulses in the pulse sequence; wherein the set pulse width is no greater than 200 milliseconds; The set duty cycle is not higher than 70%; The number of sub-pulses in the set pulse sequence is not less than 2; The target tissue includes a fibrous network of skin tissue, and the fibrous network includes fibrous septa and fascia.

3. The monopolar radiofrequency skin treatment method according to claim 2, characterized in that: The set pulse width is 10 milliseconds to 100 milliseconds; The duty cycle is no higher than 60%.

4. The monopolar radiofrequency skin treatment method according to claim 2, characterized in that: The target tissue includes a fibrous network of facial skin tissue, including fibrous septa and fascia.

5. The monopolar radiofrequency skin treatment method according to claim 2, characterized in that: The set pulse width, the set duty cycle, and the set number of sub-pulses in the pulse sequence satisfy the following formula: 0.6 seconds ≤ pulse width × (duty cycle + 100%) × number of sub-pulses ≤ 1.3 seconds.

6. The monopolar radiofrequency skin treatment method according to claim 2, characterized in that: The radio frequency pulse sequence includes a first pulse sequence and a second pulse sequence; The set pulse width of the second pulse sequence is not higher than 200 milliseconds, the set duty cycle is not higher than 70%, and the number of sub-pulses in the set pulse sequence is not less than 2; The set pulse width of the first pulse sequence is greater than the set pulse width of the second pulse sequence; The set pulse duty cycle of the first pulse train is lower than the set duty cycle of the second pulse train.

7. The monopolar radiofrequency skin treatment method according to claim 6, characterized in that: The average voltage of the sub-pulses of the first pulse train is not higher than 80% of the voltage of the sub-pulses of the second pulse train.

8. The monopolar radiofrequency skin treatment method according to claim 2, characterized in that: The power of the radio frequency pulse is 50W to 500W, and the frequency of the radio frequency pulse is 100kHz to 10MHz.

9. A monopolar radiofrequency skin treatment device, used in the monopolar radiofrequency skin treatment method according to any one of claims 1 to 8, characterized in that: Including control panel and RF output unit; The control panel is used to receive external control instructions and send the control instructions to the radio frequency output unit, wherein the control instructions are used to adjust the pulse width and duty cycle of the radio frequency pulse; The radio frequency output unit is used to output radio frequency pulses with set pulse width and set duty cycle based on the control instruction; The control panel is further used to display the energy density or energy of the radio frequency pulse corresponding to the control instruction.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the radio frequency skin treatment method according to any one of claims 1 to 8 is implemented.

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