Cold spraying control method of radio frequency treatment system and radio frequency treatment system

Abstract

The invention relates to the technical field of auxiliary medical treatment, and discloses a cold spraying control method of a radio frequency treatment system and the radio frequency treatment system. The method comprises the following steps: determining a first temperature change rate and a second temperature change rate of skin tissue in a current treatment area; wherein the first temperature change rate represents the temperature response of the skin tissue of the current treatment area to the refrigeration pulse, and the second temperature change rate represents the temperature response of the skin tissue of the current treatment area to the radio frequency pulse; and according to the first temperature change rate and the second temperature change rate, the single-time cold spraying duration of the current refrigeration pulse is determined. According to different responses of the skin tissue to temperature changes, the cold spraying duration is dynamically adjusted, it can be ensured that the temperature of the skin tissue is always kept within a safe and effective range, and it is ensured that the skin tissue in the current treatment area is prevented from being damaged while effective radio frequency treatment is conducted on the skin tissue.

Description

Technical Field

[0001] The present invention relates to the field of auxiliary medical technology, and in particular to a cold spray control method of a radio frequency treatment system and a radio frequency treatment system. Background Art

[0002] The radiofrequency treatment system uses monopolar radiofrequency technology to improve skin elasticity, firmness and reduce wrinkles. Its treatment principle is based on the heating effect of radiofrequency energy on the deep tissue of the skin. The radiofrequency treatment system produces a thermal effect by transmitting high-frequency current to the surface and deep tissue of the skin. When the current passes through the skin, due to the impedance of the tissue, the radiofrequency energy will be converted into heat, which will stimulate the dermis and subcutaneous tissue through heat, thereby promoting the regeneration of collagen. The regeneration of collagen can improve the structure of the skin and achieve the effects of lifting, firming, wrinkle removal and anti-aging.

[0003] When pure radio frequency energy acts on skin tissue, the attenuation of radio frequency current in the tissue follows an exponential distribution. However, the surface tissue is the initial path for the current to enter, and its high impedance characteristics cause a large amount of energy to be converted into Joule heat. That is, the effect of increasing the temperature of the surface tissue is stronger than that of the deep tissue. The increase in the temperature of the deep tissue is crucial to the treatment effect, which can stimulate the synthesis of collagen and elastic fibers to achieve the ultimate effect of the treatment. In actual use, the target temperature of the deep tissue can be achieved by increasing the treatment energy, that is, increasing the radio frequency output power or duration. However, this may also cause the surface tissue temperature to be too high, causing extreme pain, and may also cause skin damage such as blisters and burns.

[0004] In order to alleviate these adverse reactions, some radiofrequency treatment systems, such as some Thermage devices, have added cold spray systems to reduce the pain caused by high temperature and protect the surface tissue from overheating damage through the evaporative cooling effect of compressed gas. Under the effect of cold spray on the surface tissue, the comfort level during the treatment is greatly improved, and the pain of the beauty seekers is effectively alleviated. In addition, the cooling effect on the surface of the skin is stronger than that on the deep layer of the skin, thereby achieving the effect of low surface temperature and high deep temperature, thereby achieving the safety and effectiveness of radiofrequency treatment.

[0005] However, due to the differences in water content, electrical impedance, epidermal dermis thickness, etc. between skin tissues of different individuals and different parts of different individuals, the temperature response of skin tissues to the cold spray cooling effect and radio frequency heating effect will also be different. At this time, if the cold spray is performed with the fixed cold spray gear of the equipment, the temperature of skin tissues with weak temperature response to the cooling effect may not be effectively reduced, resulting in excessively high surface temperature in the treatment area, reducing treatment tolerance, and even possible adverse reactions; on the contrary, skin tissues with strong temperature response to the cooling effect may cause local overcooling, affecting the treatment effect. Summary of the Invention

[0006] In view of this, the present invention provides a cold spray control method for a radiofrequency treatment system and a radiofrequency treatment system, so as to solve the problem in the prior art that it is difficult to automatically adjust the cold spray function according to individual differences and the skin's response to temperature, so as to achieve effective radiofrequency treatment of skin tissue while protecting the skin tissue from damage.

[0007] In a first aspect, the present invention provides a cold spray control method for a radiofrequency treatment system, and the method includes: Determine a first temperature change rate and a second temperature change rate of the skin tissue in the current treatment area; wherein, the first temperature change rate characterizes the temperature response of the skin tissue in the current treatment area to the cooling pulse, and the second temperature change rate characterizes the temperature response of the skin tissue in the current treatment area to the radiofrequency pulse; Determine the single cold spray duration of the current cooling pulse according to the first temperature change rate and the second temperature change rate, and the single cold spray duration is used to generate a control command to control the cold spray output of the cold spray device.

[0008] In an optional implementation manner, determining the single cold spray duration of the current cooling pulse according to the first temperature change rate and the second temperature change rate includes: Determine the single radiofrequency pulse duration of the formal radiofrequency pulse; Obtain the current temperature and the safe temperature of the skin tissue in the current treatment area; Based on the first temperature change rate, the second temperature change rate, the single radiofrequency pulse duration, the current temperature, and the safe temperature, determine the single cold spray duration of the current cooling pulse.

[0009] In an optional implementation manner, based on the first temperature change rate, the second temperature change rate, the single radiofrequency pulse duration, the current temperature, and the safe temperature, determining the single cold spray duration of the current cooling pulse includes:

[0010] Wherein, is the single cold spray duration, is the safe temperature, is the current temperature, is the single radiofrequency pulse duration, is the first temperature change rate, is the second temperature change rate.

[0011] In an optional implementation manner, the first temperature change rate is obtained through the following steps: Obtain the first skin tissue temperature before cooling the skin tissue in the current treatment area with a preset cooling pulse and the second skin tissue temperature after cooling; Obtain the preset cold spray duration of the preset cooling pulse; Perform a difference operation on the second skin tissue temperature and the first skin tissue temperature to determine the first temperature difference; Perform a ratio operation on the first temperature difference and the preset cold spray duration to obtain the first temperature change rate.

[0012] In an optional implementation manner, the second temperature change rate is calculated through the following steps: Obtain the third skin tissue temperature before applying the preset radio frequency pulse to the skin tissue of the current treatment area and the fourth skin tissue temperature after cooling; Obtain the preset radio frequency duration of the preset radio frequency pulse; Perform a difference operation on the fourth skin tissue temperature and the third skin tissue temperature to determine the second temperature difference; Perform a ratio operation on the second temperature difference and the preset radio frequency duration to obtain the second temperature change rate.

[0013] In an optional implementation manner, the method further includes: Obtain the feedback signal of the radio frequency detection pulse; Detect the radio frequency link based on the feedback signal.

[0014] In a second aspect, the present invention provides a radio frequency treatment system, and the system includes: A main control device, which is used to determine the first temperature change rate and the second temperature change rate of the skin tissue of the current treatment area; wherein, the first temperature change rate characterizes the temperature response of the skin tissue of the current treatment area to the cooling pulse, and the second temperature change rate characterizes the temperature response of the skin tissue of the current treatment area to the radio frequency pulse; according to the first temperature change rate and the second temperature change rate, determine the single cold spray duration of the current cooling pulse; A cold spray device, which is used to perform cold spray output based on the single cold spray duration of the current cooling pulse.

[0015] In an optional implementation manner, the system further includes: A radio frequency device, which is used to output radio frequency pulses; The main control device is further used to control the cold spray device to output a preset cooling pulse; calculate the first temperature change rate after the preset cooling pulse is output; after an interval of a first preset time, control the radio frequency device to output a preset radio frequency pulse; calculate the second temperature change rate after the preset radio frequency pulse is output; after an interval of a second preset time, enter the formal working mode; The formal working mode includes: Step a, calculate the single cold spray duration of the current cooling pulse, and control the cold spray device to output the current cooling pulse; Step b, after the current cooling pulse is output, control the radio frequency device to output a formal radio frequency pulse; Step c, after the formal radio frequency pulse is output, wait for a third preset time interval; Step d, repeat the above steps a to c until a stop work instruction is received.

[0016] In an optional embodiment, the cold spray device includes: A refrigerant storage device for supplying refrigerant; A refrigerant channel, the input end of which is connected to the refrigerant storage device; A refrigerant processing module, the input and output ends of the refrigerant channel are connected through the refrigerant processing module, and the refrigerant processing module is connected to the main control device; The radio frequency device includes: a radio frequency circuit board, a radio frequency energy transmission cable, and a radio frequency return cable; wherein, the radio frequency circuit board is respectively connected to the main control device, the radio frequency energy transmission cable, and the radio frequency return cable.

[0017] In an optional embodiment, the system further includes: A handle device, including a handle circuit board and a cold spray controller, the cold spray controller is connected to the handle circuit board, the handle circuit board is connected to the main control device, and the refrigerant channel and the radio frequency energy transmission cable are also arranged inside the handle device; A radio frequency treatment head, the outer surface of the output end of the radio frequency treatment head is covered with a radio frequency energy emission film, the output end of the radio frequency energy transmission cable is arranged inside the radio frequency treatment head for emitting radio frequency energy to the radio frequency energy emission film; the output end of the refrigerant channel is covered on the inner surface of the radio frequency energy emission film for spraying refrigerant to the radio frequency energy emission film; a temperature sensor is also arranged on the outer surface of the output end of the radio frequency treatment head, and the temperature sensor is connected to the main control device; A radio frequency energy loop patch, connected to the radio frequency return cable, and the radio frequency energy loop patch is used for sticking to the skin tissue surface of the non-treatment area.

[0018] The technical solution of the present invention has the following advantages: The cold spray control method and the radio frequency treatment system of the radio frequency treatment system provided by the present invention dynamically adjust the cold spray duration of each cold spray pulse according to the temperature response of the skin tissue of the current treatment area of each user to be radio frequency treated, that is, the first temperature change rate and the second temperature change rate. By adjusting each cold spray output, it is ensured that the temperature of the skin tissue remains within a safe and effective range when each formal radio frequency pulse is output. In this way, while effectively performing radio frequency treatment on the skin tissue, it is ensured that the skin tissue of the current treatment area is not damaged, and the pain caused by high temperature is reduced. Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic flowchart of the cold spray control method of the radiofrequency treatment system according to an embodiment of the present invention; Figure 2 It is a timing diagram of the pulse output process according to an embodiment of the present invention; Figure 3 It is a schematic framework diagram of the radiofrequency treatment system according to an embodiment of the present invention; Figure 4 It is a schematic structural diagram of the host device according to an embodiment of the present invention; Figure 5 It is a schematic structural diagram of the handle device according to an embodiment of the present invention; Figure 6 It is a schematic diagram of the output end surface of the radiofrequency treatment head according to an embodiment of the present invention; Figure 7 It is a schematic diagram of the radiofrequency loop patch according to an embodiment of the present invention; Explanation of reference numerals: 1 - host device, 11 - main control device, 12 - cold spray device, 121 - refrigerant storage device, 122 - refrigerant channel, 123 - refrigerant processing module, 1231 - output end of the refrigerant channel, 13 - radiofrequency device, 131 - radiofrequency circuit board, 132 - radiofrequency energy transmission cable, 133 - radiofrequency return cable, 14 - display device, 141 - display circuit board, 142 - display, 143 - circuit connection line, 15 - host housing, 2 - handle device, 21 - handle circuit board, 22 - cold spray controller, 23 - handle connection line, 24 - handle housing, 3 - radiofrequency treatment head, 31 - radiofrequency energy emission film, 32 - temperature sensor, 321 - temperature sensor connection line, 33 - treatment head housing, 4 - radiofrequency energy loop patch. Specific embodiments

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0022] Currently, in some radiofrequency treatment devices equipped with a cold spray system, the cold spray volume at each energy level often adopts a fixed value, only increasing or decreasing the cold spray volume following the increase or decrease of the energy level, or even using the same cold spray volume for each level. However, the thickness of each subcutaneous layer at different tissue locations in the human body varies, and there are differences in blood vessel density, blood perfusion volume, tissue density, tissue thermal conductivity, specific heat capacity, etc.

[0023] A classic model specifically referring to the thermal conduction characteristics of biological tissues is the Pennes bioheat equation:

[0024] Where: is the tissue temperature (unit: K); is the time (unit: s); is the thermal diffusivity (unit: m² / s), which is determined by the thermal conductivity, density, and specific heat capacity of the tissue; is the metabolic heat generation rate per unit volume (unit: W / m³); is the external heat source per unit volume such as radiofrequency, laser, etc. (unit: W / m³); is the tissue density (unit: kg / m³); is the specific heat capacity (unit: J / (kg·K)); is the time delay parameter (unit: s), which reflects the delay of the temperature response caused by blood flow.

[0025] This bioheat equation describes the temperature change process at a certain point in the presence of an external heat source. The temperature change of the target tissue is affected by three factors: the energy of tissue heat conduction, the metabolic heat generation accompanied by blood circulation, and the energy brought by the external heat source. The thickness of each subcutaneous layer at different tissue locations is different, the blood vessel density and blood perfusion volume are different, and there are differences in tissue density, tissue thermal conductivity, specific heat capacity, etc. When the same external (cold) heat source acts on tissues at different locations for the same time, the thermal responses of the tissues will be different, making it difficult to achieve accurate and stable protection of the skin tissue by cold spraying. If only from the device level, adjusting the increase or decrease of the cold spray volume in coordination with the increase or decrease of the radiofrequency power, the optimal safety and effectiveness cannot be achieved.

[0026] In view of this, according to the embodiments of the present invention, an embodiment of a cold spray control method for a radiofrequency treatment system is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0027] In this embodiment, a cold spray control method for a radiofrequency treatment system is provided, which can be executed by the host device in the radiofrequency treatment system, or can also be executed by devices such as a server, a terminal, or a mobile terminal. Figure 1 It is a flowchart of the cold spray control method for the radiofrequency treatment system according to the embodiment of the present invention. As Figure 1 shown, the process includes the following steps: Step S101, determine the first temperature change rate and the second temperature change rate of the skin tissue in the current treatment area; wherein, the first temperature change rate characterizes the temperature response of the skin tissue in the current treatment area to the cooling pulse, and the second temperature change rate characterizes the temperature response of the skin tissue in the current treatment area to the radiofrequency pulse.

[0028] The first temperature change rate is calculated according to the temperature difference of the skin tissue before and after cooling after sending a cooling adaptive pulse to the skin tissue. The first temperature change rate represents the temperature response of the skin tissue to the cooling pulse and reflects the sensitivity of the skin tissue to the cooling effect. The second temperature change rate is calculated according to the temperature difference of the skin tissue before and after radiofrequency after sending a radiofrequency adaptive pulse to the skin tissue. The second temperature change rate represents the temperature response of the skin tissue to the radiofrequency pulse and reflects the sensitivity of the skin tissue to the thermal effect. Among them, the cooling adaptive pulse is the cooling pulse corresponding to the original cooling gear in the radiofrequency treatment system, and the radiofrequency adaptive pulse is the radiofrequency pulse corresponding to the original radiofrequency gear in the radiofrequency treatment system. According to the selected cooling and radiofrequency gears by the operator, the corresponding cooling adaptive pulse and radiofrequency adaptive pulse are output.

[0029] Step S102, determine the single cold spray duration of the current cooling pulse according to the first temperature change rate and the second temperature change rate. The single cold spray duration is used to generate a control command to control the cold spray output of the cold spray device 12.

[0030] During actual operation, the general usage process of the radiofrequency treatment system is as follows: The operator applies a radiofrequency coupling liquid to the area to be radiofrequency-treated of the user to be radiofrequency-treated. Subsequently, the operator holds the handle equipped with the radiofrequency treatment head 3 and places the radiofrequency treatment head 3 against the area to be radiofrequency-treated. After the placement is completed, the operator operates the host device 1 to start the output, and the host device 1 automatically performs radiofrequency energy output and cold spray output according to the pre-set energy intensity (gear).

[0031] The formal radio frequency pulses are generally output at intervals, that is, repeated output at a certain time interval. Before each output of the formal radio frequency pulse, the skin surface temperature can be reduced by outputting a cooling pulse first to relieve the pain of the user to be radiofrequency treated. In this embodiment, according to the first temperature change rate and the second temperature change rate of the skin tissue in the current treatment area of each user to be radiofrequency treated, the single cold spray duration of the current cooling pulse is calculated. According to the current skin tissue temperature situation, the cold spray duration of each cooling pulse is dynamically adjusted, and the cold spray device 12 in the radiofrequency treatment system is controlled to perform cold spray output.

[0032] The pulse output process can refer to Figure 2 As shown, first, the cold spray device 12 outputs a cooling adaptive pulse. After the output of the cooling adaptive pulse, the first temperature change rate is calculated by the active device; after a period of time, the radiofrequency device 13 is controlled to output a radiofrequency adaptive pulse; after the output of the radiofrequency adaptive pulse, the second temperature change rate is calculated by the active device, that is, operation processing; after a period of time, the single cold spray duration of the current cooling pulse is calculated, and the cold spray device 12 is controlled to output the current cooling cold spray pulse; after the output of the current cooling cold spray pulse, the radiofrequency device 13 is controlled to output the formal radiofrequency pulse; after the output of the formal radiofrequency pulse, after a period of time, the single cold spray duration of the current cooling pulse is calculated again, and the cold spray device 12 is controlled to output the current cooling cold spray pulse, and so on.

[0033] The differences in the first temperature change rate and the second temperature change rate of each user to be radiofrequency treated determine the different responses of the skin tissue to temperature. The cold spray duration can be dynamically adjusted according to the different responses of the skin tissue to temperature changes to ensure that the temperature of the skin tissue remains within a safe and effective range when each formal radiofrequency pulse is output. This can ensure that while effectively radiofrequency treating the skin tissue, the skin tissue in the current treatment area is not damaged, and the pain caused by high temperature is reduced.

[0034] Before the formal output of the radiofrequency energy in the radiofrequency treatment system of the present invention, a cooling adaptive pulse and a radiofrequency adaptive pulse are first emitted, and the temperature rise effect of the test pulse is measured by the radiofrequency treatment head, and based on this, the cold spray duration in the subsequent formal output stage is predicted and regulated, so that the cold spray effect of the radiofrequency treatment system can match the temperature rise effect of the skin tissue in the current treatment area according to the current treatment gear, realizing the accuracy and safety of the radiofrequency treatment system, ensuring that the temperature of the deep tissue will not be reduced due to excessive cooling and losing effectiveness, and at the same time ensuring that the temperature of the surface tissue will not cause skin damage due to high temperature.

[0035] In addition, the temperature measurement time points in this embodiment are all during the period without RF output, so there will be no problem that the temperature measurement value is incorrect due to RF output interference, which in turn affects temperature control. Moreover, this cold spray control method is easy to implement, without the need for a complex sensing system to measure a large number of parameters, and without the need to perform complex mechanism modeling on the tissue.

[0036] In some alternative embodiments, determining the single cold spray duration of the current cooling pulse according to the first temperature change rate and the second temperature change rate includes: Determine the single RF pulse duration of the formal RF pulse. After determining the first temperature change rate and the second temperature change rate, the formal RF pulse starts to be output. The formal RF pulse is output in the form of one pulse or several pulses output in sequence to achieve the purpose of RF treatment. The duration of RF output in this embodiment is obtained according to the single-shot output energy value of the currently set energy level, the RF output power, and the number of formal output pulses.

[0037] Obtain the current temperature and the safe temperature of the skin tissue in the current treatment area. Since the temperature perception of the skin tissue at different positions is different, it is necessary to first determine the safe temperature of the skin tissue in the current treatment area so that the skin tissue is within a safe temperature limit after cold spray and RF output. The current temperature of the skin tissue in the current treatment area is determined by the temperature sensor 32 before the start of the cooling cold spray pulse.

[0038] Based on the first temperature change rate, the second temperature change rate, the single RF pulse duration, the current temperature, and the safe temperature, determine the single cold spray duration of the current cooling pulse.

[0039] In this embodiment, according to the temperature response effect of the skin tissue in the current treatment area, the real-time temperature change situation of the skin tissue in the current treatment area, and the safe temperature of the skin tissue at different positions, the cold spray duration of each cold spray pulse is dynamically adjusted. By adjusting the cold spray output each time, it can adapt to the different thermal response situations of different tissues and achieve intelligent temperature control of the skin tissue. While ensuring safety, it can avoid the weakening of effectiveness caused by excessive cold spray and maximize the treatment efficiency.

[0040] In some alternative embodiments, based on the first temperature change rate, the second temperature change rate, the single RF pulse duration, the current temperature, and the safe temperature, determining the single cold spray duration of the current cooling pulse includes:

[0041] Wherein, is the single cold spray duration, is the safe temperature, is the current temperature, is the duration of a single radio frequency pulse, is the first temperature change rate, is the second temperature change rate.

[0042] Through the refrigeration adaptive pulse, radio frequency adaptive pulse and related measurement and configuration processes before the formal output of each shot (group) of radio frequency, intelligent temperature control of skin tissue during the treatment process of the radio frequency treatment system can be achieved. While ensuring safety, it avoids the weakening of effectiveness caused by excessive cold spraying and maximizes the treatment efficiency.

[0043] In this embodiment, according to the above function, after determining the first temperature change rate, second temperature change rate, current temperature, safe temperature of the skin tissue in the current treatment area of the user to be radio frequency treated, and the duration of a single radio frequency pulse of the current gear adopted by the current system, the duration of a single cold spray pulse for each cold spray can be quickly determined, and the skin tissue in the current treatment area can be maintained within a suitable temperature range, realizing effective radio frequency treatment of skin tissue while improving individual safety, comfort and the treatment efficiency of the radio frequency treatment system.

[0044] In some optional implementation manners, the first temperature change rate is calculated through the following steps: Step a1, obtain the first skin tissue temperature T0 before cooling the skin tissue in the current treatment area through a preset refrigeration pulse and the second skin tissue temperature T1 after cooling. Among them, the preset refrigeration pulse can be the refrigeration pulse corresponding to different gears of the radio frequency treatment system. The first skin tissue temperature and the second skin tissue temperature can be the average values of the temperatures collected by a plurality of temperature sensors 32. The cold spray controller 22 can be controlled through the handle circuit board 21 to perform a very short-time refrigerant spray.

[0045] Step a2, obtain the preset cold spray duration of the preset refrigeration pulse (refrigeration adaptive pulse) . Among them, the preset cold spray duration can be 5ms, 6ms, etc.

[0046] Step a3, perform a difference operation on the second skin tissue temperature T1 and the first skin tissue temperature T0 to determine the first temperature difference. Since the second skin tissue temperature is the temperature after cooling, therefore, the first temperature difference is negative.

[0047] Step a4, perform a ratio operation on the first temperature difference and the preset cold spray duration to obtain the first temperature change rate .

[0048] The calculation formula of the first temperature change rate is: , the first temperature change rate It reflects the temperature response effect of the skin tissue in the current treatment area to the external cold source of cold spraying.

[0049] According to the first temperature change rate, it can reflect the skin tissue in the current treatment area. Under the action of pure cold spraying, the rate of change of the skin tissue temperature with the cold spraying duration. By adjusting the cold spraying duration according to the cold source temperature change rate, the phenomena of overcooling or overheating can be avoided, ensuring that the skin tissue in the area to be treated is within a suitable temperature range, which can effectively improve the treatment safety and comfort.

[0050] In some optional embodiments, the second temperature change rate is obtained through the following steps: Step b1, obtain the third skin tissue temperature before applying a preset radio frequency pulse to the skin tissue in the current treatment area and the fourth skin tissue temperature after cooling . After a period of time in the above-mentioned refrigeration adaptive pulse output interval, record the values of each temperature sensor 32 in real time and take the average as the third skin tissue temperature . Subsequently, immediately control the radio frequency circuit board 131 to output radio frequency energy corresponding to the power set by the operator through the radio frequency energy emission film 31, that is, the radio frequency adaptive pulse. Subsequently, immediately record the values of each temperature sensor 32 in real time and take the average as the fourth skin tissue temperature ; Step b2, obtain the preset radio frequency duration of the preset radio frequency pulse . Among them, the preset cold spraying duration can be 8ms, 10ms, etc.

[0051] Step b3, perform a difference operation on the fourth skin tissue temperature and the third skin tissue temperature to determine the second temperature difference. Since the fourth skin tissue temperature is the temperature after heating, therefore, the second temperature difference is a positive value.

[0052] Step b4, perform a ratio operation on the second temperature difference and the preset radio frequency duration to obtain the second temperature change rate . The calculation formula for the second temperature change rate is: . The second temperature change rate reflects the temperature response effect of the skin tissue in the current treatment area to the external heat source of the current gear radio frequency output.

[0053] According to the second temperature change rate, it can reflect the skin tissue in the current treatment area. Under the action of simple radiofrequency, the rate at which the skin tissue temperature changes with the radiofrequency output duration. By adjusting the cold spray duration according to the heat source temperature change rate, the phenomena of being too cold or too hot can be avoided, ensuring that the skin tissue in the area to be treated is within a suitable temperature range, which can effectively improve the treatment safety and comfort.

[0054] In some alternative embodiments, the method further includes: Obtaining a feedback signal of the radiofrequency detection pulse; Detecting the radiofrequency link based on the feedback signal.

[0055] After the radiofrequency treatment system is started, the radiofrequency device 13 can first output a radiofrequency detection pulse, which can be used to detect the smoothness of the radiofrequency link and determine that the system is working properly.

[0056] In addition, this detection pulse can also help to monitor the device status in real time, avoiding abnormalities or risks during the treatment process due to link failures.

[0057] This detection pulse can also be used for impedance detection of the radiofrequency link, ensuring the impedance matching of the system, avoiding energy transmission loss or overheating phenomena, and improving the treatment effect and device safety.

[0058] The following provides a specific embodiment of cold spray control during radiofrequency treatment.

[0059] The operator applies radiofrequency coupling liquid to the area to be treated of the user to be radiofrequency treated. Subsequently, the operator holds the handle equipped with the radiofrequency treatment head and places the radiofrequency treatment head against the treatment area. After the placement is completed, the operator operates the system to start the output, and the system automatically performs radiofrequency energy output and cold spray output according to the pre-set energy intensity (gear). In this embodiment, the application part of the radiofrequency treatment head is the face, and the energy intensities are: 0.5 gear, 1.0 gear, 1.5 gear, etc., and the highest gear is 8.0 gear. The operator sets the gear to 4.0 gear through the system screen. Subsequently, after the operator presses the handle button and places it against the cheek, the radiofrequency circuit of the system outputs a radiofrequency detection pulse (still referring to Figure 2 as shown in the pulse timing diagram), which is used to detect the smoothness of the radiofrequency link and perform impedance detection of the radiofrequency link, obtaining an impedance value of 200 Ω. Subsequently, record the real-time values of each temperature sensor and take the average as = 30.0 °C, and the handle circuit board controls the cold spray controller to perform a very short-time refrigerant spray, with a duration = 5 ms, that is, the refrigeration adaptive pulse. After the spraying is completed, record the real-time values of each temperature sensor and take the average as T1 = 10.0 °C. According to T1 and The difference is used to calculate the temperature response effect of the surface tissue in the current treatment area to the external cold source of cold spraying, and this is taken as the first temperature change rate It is recorded. Among them, .

[0060] Thus, the rate of change of the surface tissue temperature with the cold spraying duration in the current treatment area under the action of pure cold spraying is obtained as -4 (°C / ms).

[0061] After an interval of 20 ms, the values of each real-time temperature sensor are recorded and averaged to be = 10.5 °C. Subsequently, immediately, the radio frequency circuit board outputs radio frequency energy corresponding to the set power level by the operator through the radio frequency energy emission film for a very short duration, with a duration = 10 ms, that is, a radio frequency adaptive pulse. Subsequently, immediately, the values of each real-time temperature sensor are recorded and averaged to be = 13.5 °C; According to and The difference is used to calculate the temperature response effect of the surface tissue in the current treatment area to the external heat source of the current radio frequency output at this gear, and this is taken as the second temperature change rate It is recorded. Among them, .

[0062] Thus, the rate of change of the surface tissue temperature with the radio frequency output duration in the current treatment area under the action of pure radio frequency is obtained as 0.2 (°C / ms).

[0063] Subsequent formal radio frequency pulses are output in the form of 5 pulses output in sequence. This radio frequency treatment system obtains the radio frequency output duration = 200 ms according to the single-shot output energy value, radio frequency output power, and the number of formal output pulses of the current set energy level. Before each radio frequency pulse, a cold spray is first performed, and the duration of the cold spray is set according to the processing result. The application site of the radio frequency treatment head in this embodiment is the face, and the safe temperature limit of the surface tissue is set to 40 °C. Before the start of the first refrigerating cold spray pulse, by reading the values of the temperature sensors, the surface tissue temperature is obtained as = 20 °C.

[0064] According to the cold spray duration formula described above:

[0065] After performing a refrigerating cold spray pulse according to = 5 ms, the surface tissue can be pre-cooled, and in the subsequent one When the formal output is 200 ms, the surface tissue will be properly and accurately protected. After an interval of 10 ms, the second refrigeration and cold spray pulse output is carried out.

[0066] Before the second refrigeration and cold spray pulse output, the value of the temperature sensor is read, and the temperature of the surface tissue is obtained as = 39 °C, and it is calculated that = 10.25 ms. Then, as before, == A refrigeration and cold spray pulse of 10.25 ms and a formal output RF pulse of 200 ms are carried out. The third, fourth, and fifth refrigeration and cold spray pulses and formal output RF pulses are also measured, calculated, and output in this way.

[0067]

[0068] Thus, through the refrigeration adaptive pulse, RF adaptive pulse before each formal RF output, and the related measurement, calculation, and configuration process, the intelligent temperature control of the surface tissue during the treatment process of the RF treatment system is realized. While ensuring safety, it avoids the weakening of effectiveness caused by excessive cold spraying, and maximizes the treatment efficiency.

[0069] In this embodiment, a RF treatment system is also provided. This system is used to implement the above-mentioned embodiments and preferred implementation manners, and those that have been described will not be repeated. As used hereinafter, the term "module" can be a combination of software and / or hardware that can achieve a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0070] This embodiment provides a RF treatment system, which is applicable to the cold spray control method of a RF treatment system described in any one of the above-mentioned embodiments. The structural schematic diagram of this RF treatment system is referred to Figure 3 as shown. The system includes: The main control device 11 is used to determine the first temperature change rate and the second temperature change rate of the skin tissue in the current treatment area; wherein, the first temperature change rate characterizes the temperature response of the skin tissue in the current treatment area to the refrigeration pulse, and the second temperature change rate characterizes the temperature response of the skin tissue in the current treatment area to the RF pulse; according to the first temperature change rate and the second temperature change rate, determine the single cold spray duration of the current refrigeration pulse, and generate a control instruction to the cold spray device 12 based on the single cold spray duration; The cold spray device 12 is used to perform cold spray output based on the single cold spray duration of the current refrigeration pulse, that is, perform cold spray output based on the control instruction sent by the main control device 11.

[0071] In this embodiment, the radiofrequency treatment system provided dynamically adjusts the cold spray duration of each cold spray pulse according to the temperature response of the skin tissue in the current treatment area of each user to be radiofrequency treated, that is, the first temperature change rate and the second temperature change rate. By adjusting the cold spray output each time, it is ensured that the temperature of the skin tissue remains within a safe and effective range when each formal radiofrequency pulse is output. In this way, while effectively radiofrequency treating the skin tissue, it is ensured that the skin tissue in the current treatment area is not damaged, and the pain caused by high temperature is reduced.

[0072] In some alternative embodiments, the system further includes: A radiofrequency device 13 for outputting radiofrequency pulses; The main control device 11 is further configured to control the cold spray device 12 to output a preset refrigeration pulse; calculate the first temperature change rate after the preset refrigeration pulse is output; after an interval of a first preset time, control the radiofrequency device 13 to output a preset radiofrequency pulse; calculate the second temperature change rate after the preset radiofrequency pulse is output; after an interval of a second preset time, enter the formal working mode; The formal working mode includes: Step a, calculate the single cold spray duration of the current refrigeration pulse, and control the cold spray device 12 to output the current refrigeration pulse; Step b, after the current refrigeration pulse is output, control the radiofrequency device 13 to output a formal radiofrequency pulse; Step c, after the formal radiofrequency pulse is output, an interval of a third preset time; Step d, repeat the above steps a to c until a stop work instruction is received.

[0073] Referring to Figure 2 As shown, first, the cold spray device 12 outputs a refrigeration adaptive pulse. After the refrigeration adaptive pulse is output, the first temperature change rate is calculated by the active device; after an interval of a period of time, the radiofrequency device 13 is controlled to output a radiofrequency adaptive pulse; after the radiofrequency adaptive pulse is output, the second temperature change rate is calculated by the active device; after an interval of a period of time, the single cold spray duration of the current refrigeration pulse is calculated, and the cold spray device 12 is controlled to output the current refrigeration cold spray pulse; after the current refrigeration cold spray pulse is output, the radiofrequency device 13 is controlled to output a formal output radiofrequency pulse; after the formal output radiofrequency pulse is output, after an interval of a period of time, continue to calculate the single cold spray duration of the current refrigeration pulse, and control the cold spray device 12 to output the current refrigeration cold spray pulse, and so on.

[0074] In this embodiment, according to the response effect of the skin tissue in the current treatment area to temperature, the real-time temperature change of the skin tissue in the current treatment area, and the safe temperature of the skin tissue at different positions, the cold spray duration of each cold spray pulse is dynamically adjusted. By adjusting the cold spray output each time, it can adapt to the different thermal response situations of different tissues and achieve intelligent temperature control of the skin tissue. While ensuring safety, it can avoid weakening the effectiveness due to excessive cold spraying and maximize the treatment efficiency.

[0075] In some alternative embodiments, the cold spray device 12 includes: A refrigerant storage device 121 for supplying refrigerant; A refrigerant channel 122, the input end of the refrigerant channel 122 is connected to the refrigerant storage device 121; A refrigerant processing module 123, the input end and the output end of the refrigerant channel 122 are connected through the refrigerant processing module 123, and the refrigerant processing module 123 is connected to the main control device 11; The radio frequency device 13 includes: a radio frequency circuit board 131, a radio frequency energy transmission cable 132, and a radio frequency return cable 133; wherein, the radio frequency circuit board 131 is respectively connected to the main control device 11, the radio frequency energy transmission cable 132, and the radio frequency return cable 133.

[0076] In some alternative embodiments, the system further includes: A handle device 2, including a handle circuit board 21 and a cold spray controller 22, the cold spray controller 22 is connected to the handle circuit board 21, the handle circuit board 21 is connected to the main control device 11, and the refrigerant channel 122 and the radio frequency energy transmission cable 132 are also arranged inside the handle device 2; A radio frequency treatment head 3, the outer surface of the output end of the radio frequency treatment head 3 is covered with a radio frequency energy emission film 31, the output end of the radio frequency energy transmission cable 132 is arranged inside the radio frequency treatment head 3 for emitting radio frequency energy to the radio frequency energy emission film 31; the output end of the refrigerant channel 122 covers the inner surface of the radio frequency energy emission film 31 for spraying refrigerant to the radio frequency energy emission film 31; a temperature sensor 32 is also arranged on the outer surface of the output end of the radio frequency treatment head 3, and the temperature sensor 32 is connected to the main control device 11; A radio frequency energy loop patch 4, connected to the radio frequency return cable 133, and the radio frequency energy loop patch 4 is used for pasting on the surface of the skin tissue in the non-treatment area.

[0077] A display circuit board 141, connected to the main control device 11; A display 142, connected to the display circuit board 141 through a circuit connection line 143.

[0078] Referring to Figures 3 to 7 as shown, Figure 3Schematic diagram of the structural framework of the radiofrequency treatment system Figure 4 Schematic diagram of the structure of the main device 1 Figure 5 Schematic diagram of the structure of the handle device 2 Figure 6 Schematic diagram of the surface of the output end of the radiofrequency treatment head 3 Figure 7 Schematic diagram of the radiofrequency loop patch. The radiofrequency treatment system consists of the main device 1, the handle device 2, the radiofrequency treatment head 3, and the radiofrequency energy loop patch 4. Among them, the main components of the main device 1 include: the main control device 11, the cold spray device 12, the radiofrequency device 13, the display device 14, and the main device housing 15; the cold spray device 12 further includes: the refrigerant storage device 121, the refrigerant channel 122, and the refrigerant processing module 123; the radiofrequency device 13 further includes: the radiofrequency circuit board 131, the radiofrequency energy transmission cable 132, and the radiofrequency return cable 133; the main components of the handle device 2 include: the handle circuit board 21, the cold spray controller 22, the handle housing 24, and the radiofrequency energy transmission cable 132. The main components of the radiofrequency treatment head 3 include: the radiofrequency energy emission film 31, the temperature sensor 32, and the refrigerant channel 122.

[0079] The main device 1 supplies power to the handle through the main control / handle connection cable 23 and communicates and controls with the handle; transmits the refrigerant to the handle device 2 and the radiofrequency treatment head 3 through the refrigerant channel 122; transmits radiofrequency energy to the skin tissue through the radiofrequency energy transmission cable 132 and the radiofrequency return cable 133; among them, the radiofrequency energy transmission cable 132 is connected to the radiofrequency treatment head 3 through the handle and emits radiofrequency energy concentratedly through the radiofrequency energy emission film 31, and the radiofrequency return cable 133 is connected to the radiofrequency loop patch, and the radiofrequency loop patch is pasted on the person to be treated.

[0080] Refer to Figure 6 As shown, in the radiofrequency treatment head 3, the outermost is the radiofrequency treatment head housing 33, and at the bottom of the housing there are the radiofrequency energy emission film 31 and the temperature sensor 32. The radiofrequency energy emission film 31 is connected to the main device 1 through the radiofrequency energy transmission cable 132 via the handle device 2. A number of temperature sensors 32 are arranged on the radiofrequency energy emission film 31, and the temperature sensors 32 are connected to the handle circuit board 21 through the temperature sensor connection cable 321; the output end 1231 of the refrigerant channel, that is, the cold spray outlet, is facing the inner side of the radiofrequency energy emission film 31 (the side in contact with the human body is the outer side). The radiofrequency energy emission film 31 is used to output radiofrequency energy externally, the temperature sensor 32 is used to collect the skin tissue temperature at the contact part of the treatment head, and the cold spray outlet is the eruption port of the refrigerant, which sprays to the radiofrequency energy emission film 31 to cool it, so as to cool the treatment part on the outer side of the treatment head.

[0081] In the handle device 2, the refrigerant channel 122 inside the handle is connected to the cold spray outlet of the radiofrequency treatment head 3. A cold spray controller 22 is connected in the refrigerant channel 122 inside the handle device 2. The cold spray controller 22 is controlled by the handle circuit board 21 to control the start and stop of the cold spray. The temperature sensor 32 is connected to the handle circuit board 21 through the temperature sensor connection line 321. The handle circuit board 21 measures the skin tissue temperature of the treatment site through the temperature sensor 32.

[0082] Referring to Figure 7 As shown, the radiofrequency loop patch is used to be pasted on the skin surface of the non-treatment area of the subject. The pasting area of the radiofrequency loop patch is much larger than the area of the radiofrequency energy emission film, so that the impedance at the radiofrequency loop patch is in a very low state. The radiofrequency circuit board, the radiofrequency energy transmission cable, the radiofrequency energy emission film, the treatment site of the subject, the body of the subject, the site where the subject pastes the loop patch, the radiofrequency loop patch, and the radiofrequency loop cable 133 constitute the single-stage radiofrequency loop of the radiofrequency treatment system.

[0083] Compared with the radiofrequency system without cold spray, the radiofrequency treatment system provided in the present invention can protect the skin tissue, avoid excessive heat accumulation in the skin tissue with a higher current density, and ensure the safety of the radiofrequency treatment system. Compared with the existing radiofrequency system with cold spray, the radiofrequency treatment system provided in the present invention adopts an adaptive cold spray control method, can adapt to different thermal response situations of different tissues, and accurately realizes the safety and effectiveness of the radiofrequency treatment system. In addition, the application scenario of the present invention is not limited to the device for facial anti-wrinkle treatment. For various radiofrequency treatment systems with pulsed output, the method of the present invention can be applied to protect the skin tissue. It not only "adapts" to the treatment site through quantitative measurement, but also "adapts" to the cold spray link and the radiofrequency output link in the system. Measurement and calculation are carried out at each radiofrequency energy output. Even if there are fluctuations in the power output of the device and the cooling capacity of the cold spray, the safety can still be accurately guaranteed.

[0084] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A cold spray control method for a radio frequency treatment system, characterized in that, The method includes: Determining a first temperature change rate and a second temperature change rate of the skin tissue in the current treatment area; wherein, the first temperature change rate characterizes the temperature response of the skin tissue in the current treatment area to a cooling pulse, and the second temperature change rate characterizes the temperature response of the skin tissue in the current treatment area to a radio frequency pulse; Determining the single cold spray duration of the current cooling pulse according to the first temperature change rate and the second temperature change rate, and the single cold spray duration is used to generate a control command to control the cold spray output of the cold spray device.

2. The method according to claim 1, wherein The determining the single cold spray duration of the current cooling pulse according to the first temperature change rate and the second temperature change rate includes: Determining the single radio frequency pulse duration of the formal radio frequency pulse; Obtaining the current temperature and the safe temperature of the skin tissue in the current treatment area; Determining the single cold spray duration of the current cooling pulse based on the first temperature change rate, the second temperature change rate, the single radio frequency pulse duration, the current temperature, and the safe temperature.

3. The method according to claim 2, wherein The determining the single cold spray duration of the current cooling pulse based on the first temperature change rate, the second temperature change rate, the single radio frequency pulse duration, the current temperature, and the safe temperature includes: Wherein, is the duration of the single cold spray, is the safety temperature, is the current temperature, is the duration of the single radio frequency pulse, is the first temperature change rate, is the second temperature change rate.

4. The method according to claim 1, characterized in that The first temperature change rate is obtained through the following steps: Obtaining a first skin tissue temperature before cooling the skin tissue in the current treatment area by a preset cooling pulse and a second skin tissue temperature after cooling; Obtaining the preset cold spray duration of the preset cooling pulse; Performing a difference operation on the second skin tissue temperature and the first skin tissue temperature to determine a first temperature difference; Performing a ratio operation on the first temperature difference and the preset cold spray duration to obtain the first temperature change rate.

5. The method according to claim 1, wherein The second temperature change rate is obtained through the following steps: Obtaining a third skin tissue temperature before applying a preset radio frequency pulse to the skin tissue in the current treatment area and a fourth skin tissue temperature after cooling; Obtaining the preset radio frequency duration of the preset radio frequency pulse; Performing a difference operation on the fourth skin tissue temperature and the third skin tissue temperature to determine a second temperature difference; Performing a ratio operation on the second temperature difference and the preset radio frequency duration to obtain the second temperature change rate.

6. The method according to claim 1, characterized in that The method further includes: Obtaining a feedback signal of a radio frequency detection pulse; Detecting a radio frequency link based on the feedback signal.

7. A radiofrequency treatment system, characterized in that, The system includes: A main control device (11), which is used to determine a first temperature change rate and a second temperature change rate of the skin tissue in the current treatment area; wherein, the first temperature change rate characterizes the temperature response of the skin tissue in the current treatment area to a cooling pulse, and the second temperature change rate characterizes the temperature response of the skin tissue in the current treatment area to a radio frequency pulse; determining the single cold spray duration of the current cooling pulse according to the first temperature change rate and the second temperature change rate; A cold spray device (12), which is used to perform cold spray output based on the single cold spray duration of the current cooling pulse.

8. The system according to claim 7, wherein The system further includes: A radio frequency device (13) for outputting radio frequency pulses; The main control device (11) is further configured to control the cold spray device (12) to output a preset refrigeration pulse; calculate a first temperature change rate after the preset refrigeration pulse is output; after an interval of a first preset time, control the radio frequency device (13) to output a preset radio frequency pulse; calculate a second temperature change rate after the preset radio frequency pulse is output; and enter a formal working mode after an interval of a second preset time. The formal working mode includes: Step a: Calculate the single cold spray duration of the current refrigeration pulse, and control the cold spray device (12) to output the current refrigeration pulse. Step b: After the current refrigeration pulse is output, control the radio frequency device (13) to output a formal radio frequency pulse. Step c: After the formal radio frequency pulse is output, an interval of a third preset time. Step d: Repeat the above steps a to c until a stop work instruction is received.

9. The system according to claim 8, characterized in that, The cold spray device (12) includes: A refrigerant storage device (121) for supplying a refrigerant. A refrigerant channel (122), the input end of the refrigerant channel (122) is connected to the refrigerant storage device (121). A refrigerant processing module (123), the input end and the output end of the refrigerant channel (122) are connected through the refrigerant processing module (123), and the refrigerant processing module (123) is connected to the main control device (11). The radio frequency device (13) includes: a radio frequency circuit board (131), a radio frequency energy transmission cable (132), and a radio frequency return cable (133); wherein, the radio frequency circuit board (131) is respectively connected to the main control device (11), the radio frequency energy transmission cable (132), and the radio frequency return cable (133).

10. The system according to claim 9, wherein The system further includes: A handle device (2), including a handle circuit board (21) and a cold spray controller (22), the cold spray controller (22) is connected to the handle circuit board (21), the handle circuit board (21) is connected to the main control device (11), and the refrigerant channel (122) and the radio frequency energy transmission cable (132) are also arranged inside the handle device (2). A radio frequency treatment head (3), the outer surface of the output end of the radio frequency treatment head (3) is covered with a radio frequency energy emission film (31), the output end of the radio frequency energy transmission cable (132) is arranged inside the radio frequency treatment head (3) for emitting radio frequency energy to the radio frequency energy emission film (31); the output end of the refrigerant channel (122) covers the inner surface of the radio frequency energy emission film (31) for spraying the refrigerant to the radio frequency energy emission film (31); a temperature sensor (32) is further arranged on the outer surface of the output end of the radio frequency treatment head (3), and the temperature sensor (32) is connected to the main control device (11). A radio frequency energy loop patch (4), connected to the radio frequency return cable (133), and the radio frequency energy loop patch (4) is used for being pasted on the skin tissue surface of a non-treatment area.

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