Cold spray control method of radiofrequency treatment system and radiofrequency treatment system

Abstract

The present invention relates to the field of auxiliary medical technology, and discloses a cold spray control method for a radio frequency treatment system and a radio frequency treatment system. The method comprises: 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 the cooling pulse, and the second temperature change rate characterizes the temperature response of the skin tissue in the current treatment area to the radio frequency pulse; and determining the duration of a single cold spray of the current cooling pulse based on the first temperature change rate and the second temperature change rate. The present invention dynamically adjusts the cold spray duration based on the different responses of the skin tissue to temperature changes, thereby ensuring that the temperature of the skin tissue is always maintained within a safe and effective range, ensuring that while the skin tissue is effectively treated with radio frequency, damage to the skin tissue in the current treatment area is avoided.

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 therapy system uses monopolar radiofrequency technology to improve skin elasticity, firmness, and reduce wrinkles. Its therapeutic principle is based on the heating effect of radiofrequency energy on the deeper layers of the skin. The radiofrequency therapy system generates a thermal effect by transmitting high-frequency current to the skin's surface and deeper layers. When the current passes through the skin, due to tissue impedance, the radiofrequency energy is converted into heat. This heat stimulates the dermis and subcutaneous tissue, promoting collagen regeneration. This collagen regeneration improves the skin's structure, achieving lifting, firming, wrinkle reduction, and anti-aging effects.

[0003] When pure radiofrequency energy acts on skin tissue, the attenuation of radiofrequency 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 causes 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, as it 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 radiofrequency 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] To alleviate these adverse reactions, some radiofrequency treatment systems, such as some Thermage devices, incorporate a cold spray system. This uses the evaporative cooling effect of compressed gas to reduce the pain caused by high temperatures and protect surface tissues from overheating damage. This cold spray on surface tissues significantly improves treatment comfort and effectively alleviates pain. Furthermore, the cooling effect on the skin's surface is stronger than that on deeper layers, resulting in a lower surface temperature and higher deep-seated temperatures, ensuring the safety and effectiveness of radiofrequency treatment.

[0005] However, due to differences in water content, electrical impedance, and epidermal dermal thickness between different individuals and in different parts of the skin, the temperature response of skin tissue to the cold spray cooling effect and radiofrequency heating effect will also vary. In this case, if the cold spray is performed using the fixed cold spray gear of the device, the temperature of skin tissue 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. Conversely, skin tissue 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 and a radio frequency treatment system for a radio frequency treatment system 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 radio frequency 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, the method comprising:

[0008] 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 a temperature response of the skin tissue in the current treatment area to a cooling pulse, and the second temperature change rate represents a temperature response of the skin tissue in the current treatment area to a radiofrequency pulse;

[0009] The single cold spray duration of the current refrigeration pulse is determined according to the first temperature change rate and the second temperature change rate. The single cold spray duration is used to generate a control instruction to control the cold spray output of the cold spray device.

[0010] In an optional embodiment, determining a single cold spray duration of a current refrigeration pulse according to the first temperature change rate and the second temperature change rate includes:

[0011] Determine the duration of a single radio frequency pulse of a formal radio frequency pulse;

[0012] Obtain the current temperature and safety temperature of the skin tissue in the current treatment area;

[0013] The single cold spray duration of the current refrigeration pulse is determined based on the first temperature change rate, the second temperature change rate, the single radio frequency pulse duration, the current temperature, and the safety temperature.

[0014] In an optional embodiment, determining a single cold spray duration of a current refrigeration pulse based on the first temperature change rate, the second temperature change rate, a single radio frequency pulse duration, the current temperature, and the safety temperature includes:

[0015]

[0016] in, For the duration of a single cold spray, For safe temperature, is the current temperature, is the duration of a single RF pulse, is the first temperature change rate, is the second temperature change rate.

[0017] In an optional embodiment, the first temperature change rate is calculated by the following steps:

[0018] Acquiring a first skin tissue temperature before cooling the skin tissue of the current treatment area by a preset cooling pulse and a second skin tissue temperature after cooling;

[0019] Get the preset cold spray duration of the preset cooling pulse;

[0020] Performing a difference operation on the second skin tissue temperature and the first skin tissue temperature to determine a first temperature difference;

[0021] A ratio operation is performed on the first temperature difference and the preset cold spray time to obtain a first temperature change rate.

[0022] In an optional embodiment, the second temperature change rate is calculated by the following steps:

[0023] obtaining a third skin tissue temperature before applying a preset radio frequency pulse to the skin tissue of the current treatment area and a fourth skin tissue temperature after cooling;

[0024] Obtaining a preset radio frequency duration of a preset radio frequency pulse;

[0025] performing a difference calculation on the fourth skin tissue temperature and the third skin tissue temperature to determine a second temperature difference;

[0026] A ratio operation is performed on the second temperature difference and the preset radio frequency duration to obtain a second temperature change rate.

[0027] In an optional embodiment, the method further includes:

[0028] Obtaining a feedback signal of a radio frequency detection pulse;

[0029] Based on the feedback signal, the radio frequency link is detected.

[0030] In a second aspect, the present invention provides a radiofrequency treatment system, the system comprising:

[0031] A main control device, the main control device 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 represents the temperature response of the skin tissue in the current treatment area to the cooling pulse, and the second temperature change rate represents the temperature response of the skin tissue in the current treatment area to the radiofrequency pulse; and determine the duration of a single cold spray of the current cooling pulse based on the first temperature change rate and the second temperature change rate;

[0032] The cold spray device is used to output cold spray based on the single cold spray duration of the current refrigeration pulse.

[0033] In an optional embodiment, the system further includes:

[0034] A radio frequency device, configured to output radio frequency pulses;

[0035] The main control device is further configured to control the cold spray device to output a preset cooling pulse; perform a first temperature change rate calculation after the preset cooling pulse is output; control the radio frequency device to output a preset radio frequency pulse after a first preset time interval; perform a second temperature change rate calculation after the preset radio frequency pulse is output; and enter a formal working mode after a second preset time interval.

[0036] The formal working mode includes:

[0037] Step a, calculating the single cold spray duration of the current cooling pulse, and controlling the cold spray device to output the current cooling pulse;

[0038] Step b, after the current cooling pulse is output, controlling the radio frequency device to output a formal radio frequency pulse;

[0039] Step c, after the formal RF pulse is output, a third preset time interval is maintained;

[0040] Step d: Repeat steps a to c above until a stop operation instruction is received.

[0041] In an optional embodiment, the cold spray device includes:

[0042] a refrigerant storage device for supplying refrigerant;

[0043] A refrigerant channel, wherein an input end of the refrigerant channel is connected to a refrigerant storage device;

[0044] A refrigerant processing module, wherein the input and output ends of the refrigerant channel are connected via the refrigerant processing module, and the refrigerant processing module is connected to the main control device;

[0045] The radio frequency device includes: a radio frequency circuit board, a radio frequency energy transmission cable, and a radio frequency loop cable; wherein the radio frequency circuit board is connected to the main control device, the radio frequency energy transmission cable, and the radio frequency loop cable respectively.

[0046] In an optional embodiment, the system further includes:

[0047] The handle device includes a handle circuit board and a cold spray controller. The cold spray controller is connected to the handle circuit board, which is connected to the main control device. A refrigerant channel and a radio frequency energy transmission cable are also provided inside the handle device.

[0048] The radio frequency treatment head has an output end covered with a radio frequency energy emitting film on its outer surface, and the output end of the radio frequency energy transmission cable is disposed within the radio frequency treatment head for emitting radio frequency energy to the radio frequency energy emitting film. The output end of the refrigerant channel is covered with the inner surface of the radio frequency energy emitting film for spraying refrigerant to the radio frequency energy emitting film. A temperature sensor is also disposed 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.

[0049] The radio frequency energy loop patch is connected to the radio frequency loop cable. The radio frequency energy loop patch is used to be adhered to the surface of skin tissue in the non-treatment area.

[0050] The technical solution of the present invention has the following advantages:

[0051] The cold spray control method and system for a radiofrequency therapy system provided by the present invention dynamically adjust the duration of each cold spray pulse based on the temperature response of the skin tissue in the current treatment area of ​​each radiofrequency user, namely, the first and second temperature change rates. By adjusting the cold spray output, the skin tissue temperature is maintained within a safe and effective range during each official radiofrequency pulse output. This ensures effective radiofrequency therapy while protecting the skin tissue in the current treatment area from damage, alleviating pain caused by high temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0053] Figure 1 is a flow chart of a cold spray control method of a radiofrequency treatment system according to an embodiment of the present invention;

[0054] Figure 2 is a timing diagram of a pulse output process according to an embodiment of the present invention;

[0055] Figure 3 is a schematic diagram of a radiofrequency treatment system according to an embodiment of the present invention;

[0056] Figure 4 is a schematic structural diagram of a host device according to an embodiment of the present invention;

[0057] Figure 5 is a schematic structural diagram of a handle device according to an embodiment of the present invention;

[0058] Figure 6 is a schematic diagram of the surface of the output end of a radiofrequency treatment head according to an embodiment of the present invention;

[0059] Figure 7 is a schematic diagram of a radio frequency loop patch according to an embodiment of the present invention;

[0060] Explanation of the accompanying drawings: 1-host device, 11-main control device, 12-cold spray device, 121-refrigerant storage device, 122-refrigerant channel, 123-refrigerant processing module, 1231-refrigerant channel output end, 13-radio frequency device, 131-radio frequency circuit board, 132-radio frequency energy transmission cable, 133-radio frequency loop 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-radio frequency treatment head, 31-radio frequency energy emission membrane, 32-temperature sensor, 321-temperature sensor connection line, 33-treatment head housing, 4-radio frequency energy loop patch. DETAILED DESCRIPTION

[0061] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0062] Currently, some radiofrequency therapy devices that include cold spray systems often use fixed cold spray volumes at each energy level, increasing or decreasing only with increasing or decreasing energy levels, or even using the same cold spray volume for all levels. However, different tissue locations in the human body vary in subcutaneous thickness, vascular density, blood perfusion, tissue density, tissue thermal conductivity, and specific heat capacity.

[0063] A classic model that specifically refers to the heat conduction characteristics of biological tissue is the Pennes bioheat equation:

[0064]

[0065] in: 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 production rate per unit volume (unit: W / m³); It is the external heat source per unit volume, such as radio frequency, 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 in blood flow response to temperature.

[0066] 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, metabolic heat production accompanied by blood circulation, and the energy brought by the external heat source. The thickness of the subcutaneous layers in different tissue locations is different, the blood vessel density and blood perfusion volume are different, and the tissue density, tissue thermal conductivity, specific heat capacity, etc. are all different. When the same external (cold) heat source acts on tissues in different locations for the same time, the thermal response of the tissue will be different, making it difficult to achieve accurate and stable protection of the skin tissue by cold spray. If only the equipment level is used to adjust the increase or decrease of the cold spray volume in conjunction with the increase or decrease of the radio frequency power, it is impossible to achieve optimal safety and effectiveness.

[0067] In view of this, according to an embodiment 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 a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0068] In this embodiment, a cold spray control method for a radiofrequency treatment system is provided, which can be executed by a host device in the radiofrequency treatment system, or by a server, terminal, mobile terminal, or other device. Figure 1 FIG. 1 is a flow chart of a cold spray control method of a radiofrequency treatment system according to an embodiment of the present invention. Figure 1 As shown, the process includes the following steps:

[0069] Step S101, 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 represents the temperature response of the skin tissue in the current treatment area to the cooling pulse, and the second temperature change rate represents the temperature response of the skin tissue in the current treatment area to the radiofrequency pulse.

[0070] The first temperature change rate is calculated based on the temperature difference before and after the skin tissue is cooled after a cooling adaptive pulse is sent 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 based on the temperature difference before and after the skin tissue is cooled after a radio frequency adaptive pulse is sent to the skin tissue. The second temperature change rate represents the temperature response of the skin tissue to the radio frequency 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 radio frequency treatment system, and the radio frequency adaptive pulse is the radio frequency pulse corresponding to the original radio frequency gear in the radio frequency treatment system. According to the cooling and radio frequency gears selected by the operator, the corresponding cooling adaptive pulse and radio frequency adaptive pulse are output.

[0071] Step S102 , determining a single cold spray duration of the current refrigeration pulse according to the first temperature change rate and the second temperature change rate, wherein the single cold spray duration is used to generate a control instruction to control the cold spray output of the cold spray device 12 .

[0072] In actual work, the general usage process of the radio frequency treatment system is: the operator applies radio frequency coupling liquid on the part to be treated by the radio frequency user, and then the operator holds the handle equipped with the radio frequency treatment head 3 and attaches the radio frequency treatment head 3 to the part to be treated by the radio frequency. After the attachment is completed, the operator operates the host device 1 to start the output, and the host device 1 automatically outputs radio frequency energy and cold spray according to the pre-set energy intensity (gear).

[0073] The actual RF pulses are typically output in intervals, that is, repeated at regular intervals. Before each actual RF pulse, a cooling pulse can be output to lower the skin surface temperature and alleviate pain for the patient. In this embodiment, the duration of a single cooling pulse is calculated based on the first and second temperature change rates of each patient's skin tissue in the current treatment area. The duration of each cooling pulse is dynamically adjusted based on the current skin tissue temperature, and the cooling device 12 in the RF treatment system is controlled to deliver the cooling pulse.

[0074] The pulse output process can refer to Figure 2As shown, a cooling adaptive pulse is first outputted by the cold spray device 12, and after the cooling adaptive pulse is outputted, a first temperature change rate calculation is performed by the active device; after a period of time, the radio frequency device 13 is controlled to output a radio frequency adaptive pulse; after the radio frequency adaptive pulse is outputted, a second temperature change rate calculation is performed by the active device, that is, an operation process; 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 current cooling cold spray pulse is outputted, the radio frequency device 13 is controlled to output a formal output radio frequency pulse; after the formal output of the radio frequency pulse, after a period of time, the single cold spray duration of the current cooling pulse is continued to be calculated, and the cold spray device 12 is controlled to output the current cooling cold spray pulse, and so on.

[0075] The different first and second temperature change rates for each RF user determine the skin's response to temperature. The cold spray duration can be dynamically adjusted based on the skin's varying responses to temperature changes, ensuring that the skin's temperature remains within a safe and effective range during each official RF pulse output. This ensures effective RF treatment while protecting the skin in the treatment area and alleviating pain caused by high temperatures.

[0076] Before the radio frequency energy of the radio frequency treatment system is officially output, the present invention first sends out a cooling adaptive pulse and a radio frequency adaptive pulse, and measures the temperature rise effect of the test pulse through the radio frequency treatment head, and predicts and adjusts the cold spray duration of the subsequent formal output stage based on this, so that the cold spray effect of the radio frequency treatment system can match the temperature rise effect of the skin tissue in the current treatment area according to the current treatment gear, thereby achieving the accuracy and safety of the radio frequency treatment system, ensuring that the temperature of the deep tissue will not reduce its effectiveness due to excessive cooling, and at the same time ensuring that the temperature of the surface tissue will not cause skin damage due to high temperature.

[0077] Furthermore, temperature measurements in this embodiment are all taken during periods when RF output is not in effect, preventing RF output interference from causing temperature measurement errors and thus affecting temperature control. Furthermore, this cold spray control method is easy to implement, eliminating the need for complex sensing systems to measure numerous parameters or complex tissue modeling.

[0078] In some optional embodiments, determining a single cold spray duration of a current refrigeration pulse according to the first temperature change rate and the second temperature change rate includes:

[0079] Determine the duration of a single RF pulse of the formal RF pulse. After determining the first and second temperature change rates, the formal RF pulse is output. The formal RF pulse is output as a single pulse or as a series of pulses to achieve the purpose of RF treatment. The duration of the RF output in this embodiment is determined based on the single-shot output energy value of the currently set energy level, the RF output power, and the number of formal output pulses.

[0080] Obtain the current temperature and safety temperature of the skin tissue in the current treatment area. Because skin tissue in different locations perceives temperature differently, it is necessary to first determine the safety temperature of the skin tissue in the current treatment area to ensure that the skin tissue remains within a safe temperature limit after the cold spray and RF output. The current temperature of the skin tissue in the current treatment area is determined by temperature sensor 32 before the cold spray pulse begins.

[0081] The single cold spray duration of the current refrigeration pulse is determined based on the first temperature change rate, the second temperature change rate, the single radio frequency pulse duration, the current temperature, and the safety temperature.

[0082] In this embodiment, the duration of each cold spray pulse is dynamically adjusted based on the skin tissue's response to temperature in the current treatment area, its real-time temperature changes, and the safe temperature of skin tissue at different locations. By adjusting the cold spray output each time, the system can adapt to the varying thermal responses of different tissues, achieving intelligent temperature control of the skin tissue. This ensures safety while avoiding the reduction of effectiveness caused by excessive cold spray, thereby maximizing treatment efficiency.

[0083] In some optional embodiments, determining the single cold spray duration of the current refrigeration pulse based on the first temperature change rate, the second temperature change rate, the single RF pulse duration, the current temperature, and the safety temperature includes:

[0084]

[0085] in, For the duration of a single cold spray, For safe temperature, is the current temperature, is the duration of a single RF pulse, is the first temperature change rate, is the second temperature change rate.

[0086] Through the cooling adaptive pulse, radio frequency adaptive pulse and related measurement and configuration processes before each radio frequency (group) is officially output, intelligent temperature control of skin tissue can be achieved during the radio frequency treatment system. While ensuring safety, excessive cold spray that reduces effectiveness is avoided, thereby maximizing treatment efficiency.

[0087] In this embodiment, according to the above function, after determining the first temperature change rate, the second temperature change rate, the current temperature, the safety temperature, and the single RF pulse duration of the gear currently adopted by the system of the skin tissue in the current treatment area of ​​the RF user, the single cold spray duration of each cold spray pulse can be quickly determined to maintain the skin tissue in the current treatment area within a suitable temperature range, thereby achieving effective RF treatment of the skin tissue while improving individual safety and comfort and the treatment efficiency of the RF treatment system.

[0088] In some optional implementations, the first temperature change rate is calculated by the following steps:

[0089] Step a1: Obtain a first skin tissue temperature T0 before cooling the skin tissue in the current treatment area using a preset cooling pulse, and a second skin tissue temperature T1 after cooling. The preset cooling pulses may be cooling pulses corresponding to different gears of the radiofrequency treatment system. The first and second skin tissue temperatures may be averages of temperatures collected by multiple temperature sensors 32. The cold spray controller 22 may be controlled by the handle circuit board 21 to produce a short refrigerant spray.

[0090] Step a2: Get the preset cooling pulse (cooling adaptive pulse) cold spray duration Among them, the preset cold spray time It can be 5ms, 6ms, etc.

[0091] Step a3, performing a difference operation on the second skin tissue temperature T1 and the first skin tissue temperature T0 to determine the first temperature difference. is the temperature after cooling, so the first temperature difference is a negative value.

[0092] Step a4: compare the first temperature difference with the preset cold spray time. Perform ratio operation to obtain the first temperature change rate .

[0093] The calculation formula for 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 spray.

[0094] The first temperature change rate reflects the rate at which the skin tissue temperature in the treatment area changes with the duration of the cold spray. Adjusting the cold spray duration based on the cold source temperature change rate can avoid overcooling or overheating, ensuring that the skin tissue in the treatment area remains within the appropriate temperature range, effectively improving treatment safety and comfort.

[0095] In some optional implementations, the second temperature change rate is calculated by the following steps:

[0096] Step b1, obtaining 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 After a period of time has passed since the above cooling adaptive pulse output, the values ​​of each temperature sensor 32 are recorded in real time and averaged as the third skin tissue temperature. Then, the RF circuit board 131 is immediately controlled to output RF energy of corresponding power, i.e., RF adaptive pulse, through the RF energy transmitting film 31 according to the gear set by the operator. Then, the real-time values ​​of each temperature sensor 32 are immediately recorded and averaged as the fourth skin tissue temperature. ;

[0097] Step b2: Obtain the preset RF duration of the preset RF pulse Among them, the preset cold spray time It can be 8ms, 10ms, etc.

[0098] Step b3, the fourth skin tissue temperature and third skin tissue temperature Perform difference calculation to determine the second temperature difference. is the temperature after heating, so the second temperature difference is a positive value.

[0099] Step b4: compare the second temperature difference with the preset RF time Perform ratio calculation to obtain the second temperature change rate The calculation formula for the second temperature change rate is: The second temperature change rate It reflects the temperature response effect of the skin tissue in the current treatment area to the external heat source output by the current radio frequency level.

[0100] The second temperature change rate reflects the rate at which the skin tissue temperature in the treatment area changes with the duration of the RF output under the influence of radiofrequency alone. Adjusting the cold spray duration based on the heat source temperature change rate can avoid overcooling or overheating, ensuring that the skin tissue in the treatment area remains within the appropriate temperature range, effectively improving treatment safety and comfort.

[0101] In some optional embodiments, the method further comprises:

[0102] Obtaining a feedback signal of a radio frequency detection pulse;

[0103] Based on the feedback signal, the radio frequency link is detected.

[0104] After the radio frequency treatment system is started, the radio frequency device 13 may first output a radio frequency detection pulse, which can be used to detect the smoothness of the radio frequency link and determine that the system is working normally.

[0105] In addition, the detection pulse can also help monitor the device status in real time to avoid abnormalities or risks during treatment due to link failure.

[0106] The detection pulse can also be used to perform impedance detection on the RF link to ensure impedance matching of the system, avoid energy transmission loss or overheating, and improve treatment efficacy and device safety.

[0107] The following provides a specific embodiment of cold spray control during radiofrequency treatment.

[0108] The operator applies RF coupling liquid on the area to be treated by the RF user, and then the operator holds the handle equipped with the RF treatment head and places the RF treatment head against the treatment area. After the placement is completed, the operator operates the system to start the output, and the system automatically outputs RF energy and cold spray according to the pre-set energy intensity (gear). In this embodiment, the RF treatment head is applied to 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 through the system screen. Afterwards, the operator presses the button on the handle, and after it is placed against the cheek, the RF circuit of the system outputs a RF detection pulse (you can still refer to Figure 2 The pulse is used to detect the smoothness of the RF link and perform impedance detection on the RF link, obtaining an impedance value of 200Ω. Subsequently, the real-time values ​​of each temperature sensor are recorded and averaged. =30.0℃, the handle circuit board controls the cold spray controller to spray refrigerant for a very short time. =5ms, i.e. cooling adaptive pulse. After the eruption, record the real-time values ​​of each temperature sensor and take the average value of T1=10.0℃. The difference is used to calculate the temperature response of the surface tissue of the current treatment area to the external cold source of the cold spray, and use it as the first temperature change rate Record it. Among them, .

[0109] The result is that the temperature change rate of the surface tissue in the current treatment area under the action of simple cold spray is -4 (°C / ms) with the duration of cold spray.

[0110] After an interval of 20ms, record the real-time values ​​of each temperature sensor and take the average value. =10.5℃. Then immediately, the RF circuit board transmits RF energy of corresponding power through the RF energy transmitting film according to the gear set by the operator. The duration is very short. =10ms, i.e. RF adaptive pulse. Then immediately record the real-time values ​​of each temperature sensor and take the average value =13.5℃; according to and The difference is used to calculate the temperature response of the surface tissue of the current treatment area to the external heat source of the current RF output, and use it as the second temperature change rate. Record it. Among them, .

[0111] Thus, it is obtained that in the current treatment area, under the action of simple radiofrequency, the surface tissue temperature changes at a rate of 0.2 (°C / ms) with the radiofrequency output duration.

[0112] The subsequent formal output RF pulses are output in the form of 5 pulses in sequence. This RF treatment system is based on the single-shot output energy value of the currently set energy level, RF output power, and the number of formal output pulses, and the duration of RF output =200ms. Before each RF pulse, a cold spray is performed first. The duration of the cold spray is The radiofrequency treatment head of this embodiment is applied to the face, and the surface tissue safety temperature limit is Set to 40℃. Before the first cooling spray pulse starts, the surface tissue temperature is obtained by reading the temperature sensor value. =20℃.

[0113] According to the cold spray duration formula as mentioned above:

[0114]

[0115] according to =5ms after a cooling cold spray pulse, the surface tissue can be pre-cooled. = 200ms of the official output, the surface tissue will be properly and accurately protected. After an interval of 10ms, the second cooling cold spray pulse output is carried out.

[0116] Before the second cooling cold spray pulse is output, the temperature sensor value is read and the surface tissue temperature is =39℃, calculated =10.25ms. Press A cooling spray pulse is performed every 10.25ms, and a formal output RF pulse is performed every 200ms. The third, fourth, and fifth cooling spray pulses and formal output RF pulses are also measured, calculated, and output in the same way.

[0117]

[0118] At this point, through the cooling adaptive pulse, radio frequency adaptive pulse and related measurement and configuration processes before each radio frequency is officially output, intelligent temperature control of the surface tissue during the radio frequency treatment system is achieved. While ensuring safety, excessive cold spray is avoided to reduce the effectiveness, thereby maximizing treatment efficiency.

[0119] This embodiment also provides a radiofrequency treatment system for implementing the above-mentioned embodiments and preferred embodiments. Details already described will not be repeated. As used below, the term "module" may refer to a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation using hardware, or a combination of software and hardware, is also possible and contemplated.

[0120] This embodiment provides a radiofrequency treatment system, which is applicable to a cold spray control method of a radiofrequency treatment system described in any of the above embodiments. Figure 3 As shown, the system includes:

[0121] A main control device 11 is configured to determine 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 a temperature response of the skin tissue in the current treatment area to a cooling pulse, and the second temperature change rate represents a temperature response of the skin tissue in the current treatment area to a radiofrequency pulse; determine a single cold spray duration of the current cooling pulse based on the first temperature change rate and the second temperature change rate, and generate a control instruction to the cold spray device 12 based on the single cold spray duration;

[0122] 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, to perform cold spray output based on the control instruction sent by the main control device 11.

[0123] The RF therapy system provided in this embodiment dynamically adjusts the duration of each cold spray pulse based on the skin tissue's temperature response in the current treatment area for each RF user, namely the first and second temperature change rates. By adjusting the cold spray output, the system ensures that the skin temperature remains within a safe and effective range during each RF pulse. This ensures effective RF therapy while protecting the skin tissue in the current treatment area from damage, alleviating pain caused by high temperatures.

[0124] In some optional embodiments, the system further includes:

[0125] A radio frequency device 13, configured to output radio frequency pulses;

[0126] The main control device 11 is further configured to control the cold spray device 12 to output a preset cooling pulse; perform a first temperature change rate calculation after the preset cooling pulse is output; control the radio frequency device 13 to output a preset radio frequency pulse after a first preset time interval; perform a second temperature change rate calculation after the preset radio frequency pulse is output; and enter a formal working mode after a second preset time interval.

[0127] The formal working mode includes:

[0128] Step a, calculating the single cold spray duration of the current cooling pulse, and controlling the cold spray device 12 to output the current cooling pulse;

[0129] Step b, after the current cooling pulse is output, controlling the radio frequency device 13 to output a formal radio frequency pulse;

[0130] Step c, after the formal RF pulse is output, a third preset time interval is maintained;

[0131] Step d: Repeat steps a to c above until a stop operation instruction is received.

[0132] Reference Figure 2 As shown, a cooling adaptive pulse is first outputted by the cold spray device 12, and after the cooling adaptive pulse is outputted, a first temperature change rate calculation is performed by the active device; after a period of time, the radio frequency device 13 is controlled to output a radio frequency adaptive pulse; after the radio frequency adaptive pulse is outputted, a second temperature change rate calculation is performed by the active device; 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 current cooling cold spray pulse is outputted, the radio frequency device 13 is controlled to output a formal output radio frequency pulse; after the formal output radio frequency pulse is outputted, after a period of time, the single cold spray duration of the current cooling pulse is continued to be calculated, and the cold spray device 12 is controlled to output the current cooling cold spray pulse, and so on.

[0133] In this embodiment, the duration of each cold spray pulse is dynamically adjusted based on the skin tissue's response to temperature in the current treatment area, its real-time temperature changes, and the safe temperature of skin tissue at different locations. By adjusting the cold spray output each time, the system can adapt to the varying thermal responses of different tissues, achieving intelligent temperature control of the skin tissue. This ensures safety while avoiding the reduction of effectiveness caused by excessive cold spray, thereby maximizing treatment efficiency.

[0134] In some optional embodiments, the cold spray device 12 includes:

[0135] A refrigerant storage device 121 for supplying refrigerant;

[0136] A refrigerant channel 122 , the input end of which is connected to the refrigerant storage device 121 ;

[0137] The refrigerant processing module 123 connects the input and output ends of the refrigerant channel 122 via the refrigerant processing module 123 , and the refrigerant processing module 123 is connected to the main control device 11 ;

[0138] The RF device 13 includes: a RF circuit board 131, a RF energy transmission cable 132, and a RF loop cable 133; wherein the RF circuit board 131 is connected to the main control device 11, the RF energy transmission cable 132, and the RF loop cable 133 respectively.

[0139] In some optional embodiments, the system further includes:

[0140] The handle device 2 includes a handle circuit board 21 and a cold spray controller 22. The cold spray controller 22 is connected to the handle circuit board 21, which is connected to the main control device 11. A refrigerant channel 122 and a radio frequency energy transmission cable 132 are also provided inside the handle device 2.

[0141] The RF treatment head 3 has an RF energy emitting film 31 covering the outer surface of the output end of the RF treatment head 3. The output end of the RF energy transmission cable 132 is disposed within the RF treatment head 3 and is used to emit RF energy to the RF energy emitting film 31. The output end of the refrigerant channel 122 is covered on the inner surface of the RF energy emitting film 31 and is used to spray refrigerant to the RF energy emitting film 31. A temperature sensor 32 is also disposed on the outer surface of the output end of the RF treatment head 3, and the temperature sensor 32 is connected to the main control device 11.

[0142] The radio frequency energy loop patch 4 is connected to the radio frequency loop cable 133 , and the radio frequency energy loop patch 4 is used to be attached to the surface of skin tissue in the non-treatment area.

[0143] A display circuit board 141 is connected to the main control device 11;

[0144] The display 142 is connected to the display circuit board 141 via a circuit connection line 143 .

[0145] Reference Figures 3 to 7 As shown, Figure 3 Schematic diagram of the radiofrequency treatment system structure. Figure 4 This is a schematic diagram of the structure of the host device 1, Figure 5 is a structural diagram of the handle device 2, Figure 6 is a schematic diagram of the output end surface of the radio frequency treatment head 3, Figure 7 Schematic diagram of the RF circuit patch. The RF treatment system consists of a host device 1, a handle device 2, an RF treatment head 3, and an RF energy circuit patch 4. The main components of the host device 1 include a main control device 11, a cold spray device 12, a RF device 13, a display device 14, and a host housing 15. The cold spray device 12 further includes a refrigerant storage device 121, a refrigerant channel 122, and a refrigerant processing module 123. The RF device 13 further includes an RF circuit board 131, an RF energy transmission cable 132, and an RF circuit cable 133. The main components of the handle device 2 include a handle circuit board 21, a cold spray controller 22, a handle housing 24, and an RF energy transmission cable 132. The main components of the RF treatment head 3 include an RF energy emitting membrane 31, a temperature sensor 32, and a refrigerant channel 122.

[0146] The host device 1 supplies power to the handle and communicates and controls the handle through the main control / handle connection line 23; transmits the refrigerant to the handle device 2 and the RF treatment head 3 through the refrigerant channel 122; transmits RF energy to the skin tissue through the RF energy transmission cable 132 and the RF loop cable 133; the RF energy transmission cable 132 is connected to the end of the RF treatment head 3 through the handle, and emits RF energy in a concentrated manner through the RF energy emission membrane 31, and the RF loop cable 133 is connected to the RF loop patch, which is affixed to the person being treated.

[0147] Reference Figure 6As shown, in the RF treatment head 3, the outermost part is the RF treatment head shell 33, and the bottom of the shell is provided with a RF energy emitting membrane 31 and a temperature sensor 32. The RF energy emitting membrane 31 is connected to the host device 1 through the handle device 2 via the RF energy transmission cable 132. Several temperature sensors 32 are provided on the RF energy emitting membrane 31, and the temperature sensors 32 are connected to the handle circuit board 21 via the temperature sensor connecting line 321; the refrigerant channel output end 1231, that is, the cold spray outlet is facing the inner side of the RF energy emitting membrane 31 (the outer side is in contact with the human body). The RF energy emitting membrane 31 is used to output RF energy to the outside, and the temperature sensor 32 is used to collect the temperature of the skin tissue at the contact part of the treatment head. The cold spray outlet is the ejection port of the refrigerant, which sprays the RF energy emitting membrane 31 to cool it down, thereby cooling the treatment part outside the treatment head.

[0148] In the handle device 2, the refrigerant channel 122 is connected to the cold spray outlet of the RF treatment head 3. A cold spray controller 22 is connected to the refrigerant channel 122. The cold spray controller 22 is controlled by the handle circuit board 21 to start and stop the cold spray. A temperature sensor 32 is connected to the handle circuit board 21 via a temperature sensor cable 321. The handle circuit board 21 uses the temperature sensor 32 to measure the temperature of the skin tissue at the treatment site.

[0149] Reference Figure 7 As shown, the RF loop patch is applied to the skin surface of the patient's non-treatment area. The RF loop patch's surface area is much larger than the RF energy emitting film's surface area, thereby maintaining a very low impedance at the RF loop patch. The RF circuit board, RF energy transmission cable, RF energy emitting film, the patient's treatment area, the patient's body, the area where the loop patch is applied, the RF loop patch, and the RF loop cable 133 constitute a single-stage RF circuit for the RF therapy system.

[0150] Compared to radio frequency systems without cold spray, the radio frequency treatment system provided in the present invention can achieve skin tissue protection, avoid excessive heat accumulation in skin tissue with higher current density, and ensure the safety of the radio frequency treatment system. Compared to existing radio frequency systems with cold spray, the radio frequency treatment system provided by the present invention adopts an adaptive cold spray control method, which can adapt to the different thermal responses of different tissues and accurately achieve the safety and effectiveness of the radio frequency treatment system. In addition, the application scenarios of the present invention are not limited to equipment for facial anti-wrinkle treatment. For all kinds of radio frequency treatment systems with pulsed output, the method of the present invention can be applied to protect skin tissue. Not only is the treatment site "adapted" through quantitative measurement, but the cold spray link and radio frequency output link in the system are also "adapted". Measurements and calculations are performed at each radio frequency energy output. Even if the power output of the equipment fluctuates or the cold spray cooling capacity fluctuates, safety can still be accurately guaranteed.

[0151] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A cold spray control method for a radiofrequency treatment system, characterized in that: The method comprises: 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 a temperature response of the skin tissue in the current treatment area to a cooling pulse, and the second temperature change rate represents a temperature response of the skin tissue in the current treatment area to a radiofrequency pulse; Determine the duration of a single radio frequency pulse of a formal radio frequency pulse; Obtain the current temperature and safety temperature of the skin tissue in the current treatment area; Determining a single cold spray duration of a current refrigeration pulse based on the first temperature change rate, the second temperature change rate, the single RF pulse duration, the current temperature, and the safety temperature, wherein the single cold spray duration is used to generate a control instruction to control the cold spray output of the cold spray device; performing a cold spray before each RF pulse; Among them, include: in, is the duration of a 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.

2. The method according to claim 1, characterized in that The first temperature change rate is calculated by the following steps: Acquiring a first skin tissue temperature before cooling the skin tissue of the current treatment area by a preset cooling pulse and a second skin tissue temperature after cooling; Obtaining a preset cold spray duration of the preset refrigeration pulse; performing a difference operation on the second skin tissue temperature and the first skin tissue temperature to determine a first temperature difference; A ratio operation is performed on the first temperature difference and the preset cold spray time to obtain the first temperature change rate.

3. The method according to claim 1, characterized in that The second temperature change rate is calculated by the following steps: obtaining a third skin tissue temperature before applying a preset radio frequency pulse to the skin tissue of the current treatment area and a fourth skin tissue temperature after cooling; Obtaining a 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; A ratio operation is performed on the second temperature difference and the preset radio frequency duration to obtain the second temperature change rate.

4. The method according to claim 1, wherein The method also includes: Obtaining a feedback signal of a radio frequency detection pulse; The radio frequency link is detected based on the feedback signal.

5. A radiofrequency treatment system, characterized in that: The system comprises: A main control device (11), the main control device (11) is used to determine 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 a temperature response of the skin tissue in the current treatment area to a cooling pulse, and the second temperature change rate represents a temperature response of the skin tissue in the current treatment area to a radio frequency pulse; determine a single radio frequency pulse duration of a formal radio frequency pulse; obtain a current temperature and a safety temperature of the skin tissue in the current treatment area; based on the first temperature change rate, the second temperature change rate, the single radio frequency pulse duration, the current temperature, and the safety temperature, determine a single cold spray duration of the current cooling pulse, wherein the single cold spray duration is used to generate a control instruction to control the cold spray output of the cold spray device; Among them, including: in, is the duration of a 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; The cold spray device (12) is used for outputting cold spray based on the single cold spray duration of the current refrigeration pulse.

6. The system according to claim 5, characterized in that The system further comprises: A radio frequency device (13) for outputting radio frequency pulses; The main control device (11) is further used to control the cold spray device (12) to output a preset cooling pulse; perform a first temperature change rate calculation after the preset cooling pulse is output; control the radio frequency device (13) to output a preset radio frequency pulse after a first preset time interval; perform a second temperature change rate calculation after the preset radio frequency pulse is output; and enter a formal working mode after a second preset time interval; The formal working mode includes: Step a, calculating the single cold spray duration of the current refrigeration pulse, and controlling the cold spray device (12) to output the current refrigeration pulse; Step b, after the current cooling pulse is output, controlling the radio frequency device (13) to output a formal radio frequency pulse; Step c, after the formal radio frequency pulse is output, a third preset time interval is maintained; Step d: repeat steps a to c above until a stop working instruction is received.

7. The system according to claim 6, characterized in that The cold spray device (12) comprises: A refrigerant storage device (121) for supplying refrigerant; A refrigerant channel (122), wherein an input end of the refrigerant channel (122) is connected to the refrigerant storage device (121); A refrigerant processing module (123), wherein the input end and the output end of the refrigerant channel (122) are connected via the refrigerant processing module (123), and the refrigerant processing module (123) is connected to the main control device (11); The radio frequency device (13) comprises: a radio frequency circuit board (131), a radio frequency energy transmission cable (132), and a radio frequency loop cable (133); wherein the radio frequency circuit board (131) is connected to the main control device (11), the radio frequency energy transmission cable (132), and the radio frequency loop cable (133), respectively.

8. The system according to claim 7, characterized in that The system further comprises: A handle device (2) comprising a handle circuit board (21) and a cold spray controller (22), wherein the cold spray controller (22) is connected to the handle circuit board (21), and the handle circuit board (21) is connected to the main control device (11). The handle device (2) is further provided with the refrigerant channel (122) and the radio frequency energy transmission cable (132); A radio frequency treatment head (3), wherein the outer surface of the output end of the radio frequency treatment head (3) is covered with a radio frequency energy emitting film (31), and the output end of the radio frequency energy transmission cable (132) is arranged in the radio frequency treatment head (3) for emitting radio frequency energy to the radio frequency energy emitting film (31); the output end of the refrigerant channel (122) is covered on the inner surface of the radio frequency energy emitting film (31) for spraying refrigerant to the radio frequency energy emitting film (31); the outer surface of the output end of the radio frequency treatment head (3) is also provided with a temperature sensor (32), and the temperature sensor (32) is connected to the main control device (11); A radio frequency energy loop patch (4) is connected to the radio frequency loop cable (133), and the radio frequency energy loop patch (4) is used to be attached to the surface of skin tissue in a non-treatment area.

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