A high-frequency heating steam ablation system with automatic frequency tracking function

Abstract

The present invention relates to the technical field of steam therapy ablation equipment, and discloses a high-frequency heating steam ablation system with an automatic frequency tracking function, comprising: a high-frequency power supply configured to generate high-frequency alternating current; a steam generator configured to evaporate internal liquid into high-temperature steam based on the high-frequency alternating current; a puncture ablation needle for introducing high-temperature steam into a target tissue site; a detection module configured to obtain impedance change data of a load connected to the steam generator, the output frequency of the high-frequency power supply, and the output steam temperature of the steam generator; and a control module configured to determine the output power of the high-frequency power supply based on the impedance change data of the load connected to the steam generator, the output frequency of the high-frequency power supply, and the output steam temperature of the steam generator. By detecting the load impedance, output frequency, and steam temperature, and combining the control module to intelligently adjust the high-frequency power supply power, the present invention achieves an efficient, stable, and precise steam heating ablation process, thereby improving the safety and effectiveness of the treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of steam therapy ablation equipment, and in particular to a high-frequency heating steam ablation system with an automatic frequency tracking function. Background Art

[0002] With the continuous advancement of medical technology, especially in the field of minimally invasive treatment, steam ablation has gradually become a mainstream method for tumor treatment and tissue ablation due to its efficient and precise thermal energy transfer capabilities. This technology uses a high-frequency power supply to drive a steam generator, rapidly evaporating the liquid into high-temperature steam. The high thermal energy of the steam is directly applied to the diseased tissue, achieving rapid tissue necrosis and ablation. Compared with traditional surgical methods, steam ablation technology has the advantages of less trauma, faster recovery, and significant therapeutic effects. It is widely used in the ablation treatment of liver tumors, lung lesions, and other tissues, greatly improving the patient's treatment experience and efficacy.

[0003] However, in clinical applications, traditional high-frequency steam heating ablation systems face significant technical challenges. Human tissue structure is complex and exhibits significant individual differences. Furthermore, during treatment, the physical and physiological state of tissues changes dynamically over time, leading to frequent and unpredictable fluctuations in the impedance of the steam generator connected to the load. Since changes in load impedance directly affect the system's resonant frequency, if the system cannot accurately track and dynamically adjust the resonant frequency, frequency detuning will occur, significantly reducing heating efficiency. This not only prolongs treatment time but can also cause uneven heat energy distribution, reduce treatment effectiveness, and even pose potential risks to patient health. Furthermore, although some high-frequency steam heating ablation devices currently on the market have attempted to introduce load impedance detection and frequency adjustment mechanisms to improve the system's responsiveness to load changes, these solutions generally suffer from slow response speeds, insufficient frequency adjustment accuracy, and high control algorithm complexity, making it difficult to meet the stringent clinical requirements for system stability and high-precision control.

[0004] Therefore, there is an urgent need to invent a steam ablation technology that aims to achieve rapid and accurate detection of dynamic changes in load impedance and automatic frequency adjustment to ensure stable and efficient operation of the high-frequency heating steam ablation system. Summary of the Invention

[0005] In view of this, the present invention proposes a high-frequency heating steam ablation system with automatic frequency tracking function, which aims to solve the problem in current technology of how to achieve rapid and accurate detection of dynamic changes in load impedance and automatic frequency adjustment, and ensure stable and efficient operation of the high-frequency heating steam ablation system.

[0006] The present invention proposes a high-frequency heating steam ablation system with an automatic frequency tracking function, comprising:

[0007] a high-frequency power supply configured to generate high-frequency alternating current;

[0008] a steam generator electrically connected to the high-frequency power supply, the steam generator being configured to evaporate an internal liquid into high-temperature steam based on the high-frequency alternating current;

[0009] The puncture ablation needle is connected to the steam generator and is used to introduce high-temperature steam into the target tissue area;

[0010] a detection module, connected to the high-frequency power supply and the steam generator, respectively, and configured to obtain impedance change data of a load connected to the steam generator, an output frequency of the high-frequency power supply, and an output steam temperature of the steam generator;

[0011] The control module is electrically connected to the detection module and the high-frequency power supply, respectively. The control module is configured to determine the output power of the high-frequency power supply based on the impedance change data of the load connected to the steam generator, the output frequency of the high-frequency power supply, and the output steam temperature of the steam generator.

[0012] Furthermore, the detection module includes:

[0013] An impedance detection unit is disposed inside the steam generator, and is configured to detect impedance data of a load connected to the steam generator;

[0014] a temperature detection unit, disposed inside the steam generator, configured to detect the real-time steam temperature inside the steam generator and the output steam temperature of the steam generator;

[0015] The frequency detection unit is configured in the output path of the high-frequency power supply, and is configured to detect the real-time output frequency of the high-frequency alternating current output by the high-frequency power supply.

[0016] Furthermore, the control module includes:

[0017] a collection unit electrically connected to the impedance detection unit, the temperature detection unit, and the frequency detection unit, respectively, and configured to obtain impedance data of a load connected to the steam generator, a real-time steam temperature inside the steam generator, an output steam temperature of the steam generator, and a real-time output frequency of the high-frequency alternating current;

[0018] an analysis unit electrically connected to the acquisition unit, the analysis unit being configured to obtain data information of the tissue to be ablated, and determine a preset output frequency based on the data information of the tissue to be ablated, impedance data of a load connected to the steam generator, a real-time steam temperature inside the steam generator, and an output steam temperature of the steam generator, and the analysis unit being further configured to determine an adjustment coefficient based on a relationship between the preset output frequency and the real-time output frequency of the high-frequency alternating current;

[0019] The central control unit is electrically connected to the analysis unit and the high-frequency power supply. The central control unit is configured to generate a control instruction according to the adjustment coefficient and control the high-frequency power supply to output high-frequency alternating current according to the control instruction.

[0020] Furthermore, the analysis unit determines the preset output frequency based on the data information of the tissue to be ablated, the impedance data of the load connected to the steam generator, the real-time steam temperature inside the steam generator, and the output steam temperature of the steam generator, including:

[0021] The analyzing unit is further configured to determine the size of the tissue to be ablated and the location of the ablated tissue based on the data information of the tissue to be ablated, and determine the ablation duration and ablation temperature based on the size of the tissue to be ablated and the location of the ablated tissue;

[0022] The analysis unit is further configured to obtain an absolute value of a temperature difference between the ablation temperature and the output steam temperature, and determine whether to adjust the real-time steam temperature based on a relationship between the absolute value of the temperature difference and a preset temperature threshold configured by the analysis unit:

[0023] When the absolute value of the temperature difference is lower than or equal to the preset temperature threshold, the analysis unit determines not to adjust the real-time steam temperature, and sets the high-frequency alternating current frequency corresponding to the real-time steam temperature as the preset output frequency;

[0024] When the absolute value of the temperature difference is higher than the preset temperature threshold, the analysis unit determines the adjustment coefficient based on the temperature difference between the ablation temperature and the output steam temperature, and determines the high-frequency AC frequency adjusted by the adjustment system as the preset output frequency.

[0025] Furthermore, the analysis unit determines the adjustment coefficient according to the temperature difference between the ablation temperature and the output steam temperature, including:

[0026] The analysis unit is further configured to determine an adjustment coefficient according to a relationship between the temperature difference and a first preset temperature difference and a second preset temperature difference configured by the analysis unit:

[0027] When the temperature difference is lower than the first preset temperature difference absolute value, the analysis unit determines the adjustment coefficient to be L1;

[0028] When the temperature difference is higher than the first preset temperature difference and lower than or equal to the second preset temperature difference, the analysis unit determines the adjustment coefficient to be L2;

[0029] When the temperature difference is higher than the second preset temperature difference, the analysis unit determines the adjustment coefficient to be L3;

[0030] The first preset temperature difference is smaller than the second preset temperature difference, and L1>1>L2>L3.

[0031] Furthermore, when the analysis unit determines the preset output frequency, the analysis unit is further configured to determine whether to modify the preset output frequency according to the impedance data of the load connected to the steam generator, including:

[0032] The analyzing unit is further configured to determine the resonant frequency of the steam generator connected load according to the impedance data of the steam generator connected load and Formula 1:

[0033] Formula (1)

[0034] Among them, f r is the resonant frequency of the steam generator connected to the load, is the frequency point with minimum impedance, R 2 is the square of the real part of the impedance, 2πfL is the inductive reactance, is the capacitive reactance;

[0035] The analysis unit is further configured to determine whether to modify the preset output frequency according to a relationship between a resonant frequency of a load connected to the steam generator and a preset resonant frequency configured by the analysis unit.

[0036] Furthermore, the analyzing unit determines whether to correct the preset output frequency based on the relationship between the resonant frequency of the load connected to the steam generator and the preset resonant frequency, including:

[0037] When the resonant frequency is consistent with the preset resonant frequency, the analysis unit determines that the preset output frequency does not need to be corrected;

[0038] When the resonant frequency is inconsistent with the preset resonant frequency, the analyzing unit determines a correction coefficient according to the resonant frequency difference between the resonant frequency and the preset resonant frequency, and corrects the preset output frequency according to the correction coefficient.

[0039] Furthermore, when the analysis unit determines the correction coefficient according to the resonant frequency difference between the resonant frequency and the preset resonant frequency, it includes:

[0040] The analysis unit is further configured to determine a correction coefficient according to a relationship between the resonant frequency difference and a first preset resonant frequency difference and a second preset resonant frequency difference configured by the analysis unit:

[0041] When the resonant frequency difference is lower than the first preset resonant frequency difference absolute value, the analysis unit determines the correction coefficient as K1;

[0042] When the resonant frequency difference is higher than the first preset resonant frequency difference and the resonant frequency difference is lower than or equal to the second preset resonant frequency difference, the analysis unit determines the correction coefficient to be K2;

[0043] When the resonant frequency difference is higher than the second preset resonant frequency difference, the analysis unit determines the correction coefficient as K3;

[0044] The first preset resonant frequency difference is smaller than the second preset resonant frequency difference, and K1>1>K2>K3.

[0045] Furthermore, the analysis unit determines the adjustment coefficient according to the relationship between the preset output frequency and the real-time output frequency of the high-frequency alternating current, including:

[0046] The analyzing unit is configured to determine whether to adjust the real-time output frequency of the high-frequency alternating current based on an output frequency ratio between the preset output frequency and the real-time output frequency of the high-frequency alternating current, and based on a relationship between the output frequency ratio and a first preset output frequency ratio and a second preset output frequency ratio configured by the analyzing unit:

[0047] When the output frequency ratio is less than the first preset output frequency ratio, or the output frequency ratio is greater than or equal to the second preset output frequency ratio, the analysis unit determines to adjust the real-time output frequency of the high-frequency alternating current;

[0048] When the output frequency ratio is greater than or equal to the first preset output frequency ratio and is less than the second preset output frequency ratio, the analysis unit determines not to adjust the real-time output frequency of the high-frequency alternating current.

[0049] Furthermore, when the analysis unit determines to adjust the real-time output frequency of the high-frequency alternating current, the analysis unit includes:

[0050] When the output frequency ratio is less than the first preset output frequency ratio, the analysis unit determines that the adjustment system range for adjusting the real-time output frequency of the high-frequency alternating current is (M1 < M2 ... < Mmax < 1);

[0051] When the output frequency ratio is greater than or equal to the second preset output frequency ratio, the analysis unit determines that the adjustment system range for adjusting the real-time output frequency of the high-frequency alternating current is (1<N1<N2...<Nmax).

[0052] Compared with existing technologies, the present invention offers the following advantages: by incorporating a high-precision detection module, it is able to continuously monitor the impedance changes of the steam generator's connected load, the output frequency of the high-frequency power supply, and the steam output temperature of the steam generator in real time, providing the system with rich and accurate operational status information. This multi-dimensional data acquisition method provides a solid data foundation for subsequent automatic control and effectively improves the system's ability to perceive dynamic load changes. Secondly, by comprehensively analyzing and processing the collected data with the help of the control module, the system can accurately determine the optimal operating parameters for the current load state and automatically adjust the output power of the high-frequency power supply to ensure that the steam generator always operates stably within the optimal resonant frequency range. This automatic adjustment function greatly reduces the need for human intervention, improves the flexibility and adaptability of the system's operation, and significantly enhances heating efficiency and treatment effectiveness. Finally, the system can effectively address the challenges posed by individual differences in human tissue and changes in tissue state during treatment, ensuring the stability of steam temperature and power output, avoiding energy waste and treatment deviation caused by frequency detuning, and thus enhancing the safety and reliability of treatment. Overall, the present invention realizes intelligent and automated control of high-frequency heating steam ablation systems, promoting the advancement of medical device technology and improving the precision and effectiveness of clinical treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0054] Figure 1 This is a functional block diagram of a high-frequency heating steam ablation system with automatic frequency tracking function provided by an embodiment of the present invention;

[0055] Figure 2 This is a flow chart of a high-frequency heating steam ablation system with automatic frequency tracking function provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0056] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, unless there is a conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0057] like Figure 1-Figure 2 As shown, in some embodiments of the present application, this embodiment provides a high-frequency heating steam ablation system with an automatic frequency tracking function, including: a high-frequency power supply, a steam generator, a puncture ablation needle, a detection module and a control module.

[0058] Specifically, the high-frequency power supply is configured to generate high-frequency alternating current; the steam generator is electrically connected to the high-frequency power supply, and the steam generator is configured to evaporate the internal liquid into high-temperature steam based on the high-frequency alternating current; the puncture ablation needle is connected to the steam generator for introducing high-temperature steam into the target tissue site; the detection module is respectively connected to the high-frequency power supply and the steam generator, and the detection module is configured to obtain the impedance change data of the load connected to the steam generator, the output frequency of the high-frequency power supply, and the output steam temperature of the steam generator; the control module is respectively electrically connected to the detection module and the high-frequency power supply, and the control module is configured to determine the output power of the high-frequency power supply based on the impedance change data of the load connected to the steam generator, the output frequency of the high-frequency power supply, and the output steam temperature of the steam generator.

[0059] As can be understood, the high-frequency alternating current generated by the high-frequency power supply drives the steam generator, rapidly heating and evaporating the internal liquid into high-temperature steam. Through the connection between the steam generator and the puncture ablation needle, the high-temperature steam is effectively introduced into the target tissue, achieving thermal ablation of the diseased tissue. To ensure stable and efficient system operation despite load fluctuations, a detection module is configured to collect key operating parameters in real time, including changes in the impedance of the steam generator's connected load, the output frequency of the high-frequency power supply, and the steam output temperature of the steam generator. This data reflects the system's load status and heating efficiency and serves as the basis for automatic control. Based on the multi-dimensional data collected by the detection module, the control module uses a pre-set algorithm to dynamically analyze the relationship between changes in load impedance and resonant frequency, calculating the optimal resonant frequency and corresponding output power under the current load conditions. The control module then adjusts the output power of the high-frequency power supply to achieve automatic frequency tracking and power regulation, ensuring that the steam generator always operates at its optimal state, maximizing heating efficiency and treatment effectiveness, while ensuring safe and stable system operation.

[0060] Specifically, the detection module includes: an impedance detection unit, which is configured inside the steam generator, and the impedance detection unit is configured to detect the impedance data of the load connected to the steam generator; a temperature detection unit, which is configured inside the steam generator, and the temperature detection unit is configured to detect the real-time steam temperature inside the steam generator and the output steam temperature of the steam generator; a frequency detection unit, which is configured in the output path of the high-frequency power supply, and the frequency detection unit is configured to detect the real-time output frequency of the high-frequency alternating current output by the high-frequency power supply.

[0061] As can be understood, the detection module consists of an impedance detection unit, a temperature detection unit, and a frequency detection unit, located within the steam generator and in the high-frequency power supply output path, respectively, to ensure the system can accurately and in real time collect key operating parameters. The impedance detection unit, located within the steam generator, monitors the impedance of the load connected to the steam generator in real time. Changes in load impedance reflect the dynamic characteristics of human tissue and the ablation process. This data provides a direct basis for the system to determine the resonant state and adjust the operating frequency, and is key to implementing the automatic frequency tracking function. The temperature detection unit, also located within the steam generator, collects real-time temperature data both within the steam generator and within the output steam. This temperature information not only reflects heating efficiency and steam generation stability, but also provides feedback to the control module, enabling it to adjust the high-frequency power supply output power to maintain a stable output steam temperature and ensure safe and effective treatment. The frequency detection unit, located within the high-frequency power supply output path, detects the frequency of the high-frequency AC power output in real time. This frequency data helps the control module accurately determine the system's current operating frequency. Combining impedance and temperature information, it dynamically calculates and adjusts the resonant frequency, enabling automatic frequency tracking and power optimization. Through the coordinated work of these three detection units, the system can fully and real-time perceive the load status and operating parameters, providing reliable data support for the control module, thereby realizing intelligent and precise control of the high-frequency heating steam ablation system and significantly improving the stability and effectiveness of treatment.

[0062] Specifically, the control module includes: an acquisition unit electrically connected to the impedance detection unit, the temperature detection unit and the frequency detection unit respectively, the acquisition unit is configured to obtain the impedance data of the load connected to the steam generator, the real-time steam temperature inside the steam generator, the output steam temperature of the steam generator and the real-time output frequency of the high-frequency alternating current; an analysis unit electrically connected to the acquisition unit, the analysis unit is configured to obtain data information of the tissue to be ablated, and determine the preset output frequency based on the data information of the tissue to be ablated and the impedance data of the load connected to the steam generator, the real-time steam temperature inside the steam generator and the output steam temperature of the steam generator, the analysis unit is further configured to determine the adjustment coefficient based on the relationship between the preset output frequency and the real-time output frequency of the high-frequency alternating current; a central control unit is electrically connected to the analysis unit and the high-frequency power supply, the central control unit is configured to generate a control instruction based on the adjustment coefficient, and control the high-frequency power supply to output high-frequency alternating current according to the control instruction.

[0063] As can be understood, the control module consists of an acquisition unit, an analysis unit, and a central control unit. These units work closely together through electrical connections to achieve intelligent control of the high-frequency heated steam ablation system. The acquisition unit is responsible for acquiring key operating parameters in real time from the impedance detection unit, temperature detection unit, and frequency detection unit. These parameters include load impedance data, steam generator internal and output steam temperatures, and the real-time output frequency of the high-frequency alternating current (HFAC). This data provides a comprehensive and accurate input basis for subsequent analysis and control. The analysis unit performs a comprehensive analysis based on the operational data provided by the acquisition unit, combined with data on the tissue to be ablated. By comparing the preset output frequency with the actual output frequency of the HFAC, it calculates the adjustment coefficient, which provides a decision basis for the system's automatic frequency adjustment and power control. This analytical capability enables the system to adapt to dynamic changes in load and tissue conditions, achieving precise frequency tracking. Based on the adjustment coefficient generated by the analysis unit, the central control unit generates specific control instructions, directly controlling the output frequency and power of the HF power supply, achieving real-time adjustment of the HFAC. Under the control of the central control unit, the system can rapidly respond to load and temperature changes, ensuring that the steam generator always operates in optimal working conditions, improving heating efficiency and treatment safety. In summary, the control module forms a closed-loop feedback control system through the coordinated work of the three major units of acquisition, analysis and control, realizing the intelligent automatic frequency tracking and power adjustment of the high-frequency heating steam ablation system, ensuring the accuracy, efficiency and safety of the treatment process.

[0064] Specifically, when the analysis unit determines the preset output frequency based on the data information of the tissue to be ablated, the impedance data of the load connected to the steam generator, the real-time steam temperature inside the steam generator, and the output steam temperature of the steam generator, it includes: the analysis unit is also configured to determine the size of the tissue to be ablated and the position of the ablated tissue based on the data information of the tissue to be ablated, and determine the ablation time and the ablation temperature based on the size of the tissue to be ablated and the position of the ablation tissue; the analysis unit is also configured to obtain the absolute value of the temperature difference between the ablation temperature and the output steam temperature, and determine whether to adjust the real-time steam temperature based on the relationship between the absolute value of the temperature difference and the preset temperature threshold configured by the analysis unit: when the absolute value of the temperature difference is lower than or equal to the preset temperature threshold, the analysis unit determines not to adjust the real-time steam temperature, and uses the high-frequency AC frequency corresponding to the real-time steam temperature as the preset output frequency; when the absolute value of the temperature difference is higher than the preset temperature threshold, the analysis unit determines the adjustment coefficient based on the temperature difference between the ablation temperature and the output steam temperature, and determines the high-frequency AC frequency adjusted according to the adjustment system as the preset output frequency.

[0065] Specifically, when the analysis unit determines the adjustment coefficient based on the temperature difference between the ablation temperature and the output steam temperature, it includes: the analysis unit is also configured to determine the adjustment coefficient based on the relationship between the temperature difference and the first preset temperature difference and the second preset temperature difference configured by the analysis unit: when the temperature difference is lower than the absolute value of the first preset temperature difference, the analysis unit determines the adjustment coefficient to be L1; when the temperature difference is higher than the first preset temperature difference, and the temperature difference is lower than or equal to the second preset temperature difference, the analysis unit determines the adjustment coefficient to be L2; when the temperature difference is higher than the second preset temperature difference, the analysis unit determines the adjustment coefficient to be L3; wherein, the first preset temperature difference is less than the second preset temperature difference, and L1>1>L2>L3.

[0066] It is understood that the analysis unit intelligently calculates and dynamically adjusts the preset output frequency by integrating data on the tissue to be ablated with data on the steam generator's load impedance and internal and output steam temperatures. First, the analysis unit determines the appropriate ablation duration and temperature based on the size and location of the tissue to be ablated, providing target parameters for subsequent frequency adjustment and power control. Furthermore, the analysis unit evaluates the deviation between the current steam heating effect and the desired temperature requirement by calculating the absolute value of the temperature difference between the ablation temperature and the actual output steam temperature. This temperature difference is used to determine whether the real-time steam temperature needs to be adjusted, ensuring that the steam temperature meets treatment requirements and ensuring the effectiveness and safety of the ablation process. If the temperature difference does not exceed a preset temperature threshold, the analysis unit deems the steam temperature to meet the requirement and sets the high-frequency AC frequency corresponding to the real-time steam temperature to the preset output frequency without further adjustment. If the temperature difference exceeds the threshold, the frequency is subdivided into different levels based on the magnitude of the temperature difference. The analysis unit maps the temperature difference to corresponding adjustment coefficients (L1, L2, and L3) based on the first and second preset temperature differences. These adjustment coefficients are used to modify the output frequency of the high-frequency AC power. Specifically, the adjustment coefficient decreases with increasing temperature differentials: when the temperature differential is small, the adjustment coefficient is L1 (greater than 1, indicating an increase in frequency to increase heat output); when the temperature differential is moderate, the adjustment coefficient is L2 (less than 1 but greater than L3, indicating a moderate reduction in frequency to adjust power); and when the temperature differential is large, the adjustment coefficient is L3 (further reducing the frequency to prevent overheating). This hierarchical adjustment strategy enables the system to flexibly adjust the frequency based on temperature deviations, achieving precise thermal energy control and ensuring the stability and safety of ablation treatments.

[0067] As can be seen, the analysis unit intelligently identifies the size and location of the tissue to be ablated, thereby calculating the required ablation duration and target temperature, enabling personalized treatment parameter setting. This adaptive mechanism avoids a one-size-fits-all ablation protocol, improves treatment adaptability for different patients and lesion locations, and significantly enhances the targeted and effective nature of treatment. Secondly, the temperature difference determines whether steam temperature adjustment is necessary. This temperature feedback closed-loop control logic provides the system with dynamic temperature compensation capabilities, effectively preventing under- or over-ablation caused by temperature deviations and ensuring accurate and safe tissue heating. Furthermore, when the analysis unit identifies a temperature difference exceeding a threshold, it does not simply implement a one-size-fits-all adjustment. Instead, it implements a graded control strategy based on different levels of temperature difference, using three adjustment coefficients (L1, L2, and L3). This graded adjustment strategy enables more precise and flexible frequency correction, effectively balancing system response speed and frequency adjustment stability, avoiding frequent oscillation or overshoot, and improving overall system regulation efficiency and operational stability. Finally, through this technical solution, the system realizes a complete closed-loop logic chain from tissue feature recognition, temperature difference assessment to frequency adaptive adjustment, which not only improves the temperature control accuracy and frequency control sensitivity of ablation treatment, but also significantly enhances the intelligence level and clinical practical value of the steam ablation system while ensuring safety.

[0068] Specifically, when the analysis unit determines the preset output frequency, the analysis unit is further configured to determine whether to correct the preset output frequency based on the impedance data of the load connected to the steam generator, including: the analysis unit is further configured to determine the resonant frequency of the load connected to the steam generator based on the impedance data of the load connected to the steam generator and Formula 1:

[0069] Formula (1)

[0070] Among them, f r is the resonant frequency of the steam generator connected to the load, is the frequency point with minimum impedance, R 2 is the square of the real part of the impedance, 2πfL is the inductive reactance, the analysis unit is further configured to determine whether to correct the preset output frequency according to the relationship between the resonant frequency of the steam generator connected to the load and the preset resonant frequency configured by the analysis unit.

[0071] Specifically, the analysis unit determines whether to correct the preset output frequency based on the relationship between the resonant frequency of the load connected to the steam generator and the preset resonant frequency, including: when the resonant frequency and the preset resonant frequency are consistent, the analysis unit determines not to correct the preset output frequency; when the resonant frequency and the preset resonant frequency are inconsistent, the analysis unit determines a correction coefficient based on the resonant frequency difference between the resonant frequency and the preset resonant frequency, and corrects the preset output frequency based on the correction coefficient.

[0072] Specifically, when the analysis unit determines the correction coefficient based on the resonant frequency difference between the resonant frequency and the preset resonant frequency, it includes: the analysis unit is also configured to determine the correction coefficient based on the relationship between the resonant frequency difference and the first preset resonant frequency difference and the second preset resonant frequency difference configured by the analysis unit: when the resonant frequency difference is lower than the absolute value of the first preset resonant frequency difference, the analysis unit determines the correction coefficient to be K1; when the resonant frequency difference is higher than the first preset resonant frequency difference, and the resonant frequency difference is lower than or equal to the second preset resonant frequency difference, the analysis unit determines the correction coefficient to be K2; when the resonant frequency difference is higher than the second preset resonant frequency difference, the analysis unit determines the correction coefficient to be K3; wherein, the first preset resonant frequency difference is less than the second preset resonant frequency difference, and K1>1>K2>K3.

[0073] It can be understood that the analysis unit collects and processes the impedance data of the steam generator connected to the load in real time, and uses formula (1) to calculate the resonant frequency of the current load. This resonant frequency corresponds to the frequency point with the minimum impedance and is a key parameter in the electrical characteristics of the system, reflecting the dynamic changes of the load. Through the relationship between the square of the real part of the impedance, the inductive reactance, and the capacitive reactance, the resonant point of the system can be accurately obtained, providing a scientific basis for subsequent frequency adjustment. Secondly, the analysis unit compares the calculated actual resonant frequency with the pre-set resonant frequency to determine whether the two are consistent. When the two match, the system maintains the preset output frequency, ensuring stable output of the high-frequency power supply and effectively avoiding efficiency degradation or equipment abnormality caused by frequency offset; when there is inconsistency, the correction strategy is further determined according to the size of the resonant frequency difference, demonstrating dynamic adaptive frequency modulation capabilities. Furthermore, the analysis unit implements hierarchical processing of the resonant frequency difference and introduces three correction coefficients corresponding to frequency deviations of different magnitudes. By using two preset thresholds to distinguish the range of the difference, the system can achieve fine-grained frequency correction: when the frequency difference is small, a larger correction coefficient is selected to quickly adjust the output frequency; a moderate correction coefficient is used for medium deviations; and when the difference is large, the smallest correction coefficient is used to prevent excessive frequency correction from causing system oscillation or instability. This hierarchical adjustment method effectively balances system stability and adjustment accuracy while ensuring response speed. In summary, the analysis unit determines the resonant frequency in real time based on the load impedance characteristics, and dynamically adjusts the preset output frequency through intelligent difference comparison and graded correction coefficients, constructing an efficient, accurate and stable automatic frequency tracking control mechanism, which significantly improves the working efficiency and treatment safety of the steam ablation system.

[0074] Specifically, when the analysis unit determines the adjustment coefficient based on the relationship between the preset output frequency and the real-time output frequency of the high-frequency alternating current, it includes: the analysis unit is configured to determine whether to adjust the real-time output frequency of the high-frequency alternating current based on the output frequency ratio between the preset output frequency and the real-time output frequency of the high-frequency alternating current, and based on the relationship between the output frequency ratio and the first preset output frequency ratio and the second preset output frequency ratio configured by the analysis unit: when the output frequency ratio is less than the first preset output frequency ratio, or the output frequency ratio is greater than or equal to the second preset output frequency ratio, the analysis unit determines to adjust the real-time output frequency of the high-frequency alternating current; when the output frequency ratio is greater than or equal to the first preset output frequency ratio, and the output frequency ratio is less than the second preset output frequency ratio, the analysis unit determines not to adjust the real-time output frequency of the high-frequency alternating current.

[0075] Specifically, when the analysis unit determines to adjust the real-time output frequency of high-frequency alternating current, it includes: when the output frequency ratio is less than the first preset output frequency ratio, the analysis unit determines that the adjustment system range when adjusting the real-time output frequency of high-frequency alternating current is (M1 < M2...... < Mmax < 1); when the output frequency ratio is greater than or equal to the second preset output frequency ratio, the analysis unit determines that the adjustment system range when adjusting the real-time output frequency of high-frequency alternating current is (1 < N1 < N2...... < Nmax).

[0076] It can be understood that the analysis unit collects the preset output frequency and the real-time output frequency of high-frequency alternating current, and calculates the output frequency ratio between the two as an important indicator for judging whether there is a frequency offset in the system. This frequency ratio can effectively reflect whether the current actual output meets the ideal heating conditions and is a key parameter for evaluating resonance stability and thermal efficiency. Secondly, the analysis unit constructs a frequency offset determination interval by comparing with the preset first output frequency ratio and second output frequency ratio. When the ratio falls between the first and second ratios, it means that the frequency is within a reasonable range and no adjustment is required. The system can maintain the current output frequency operation to ensure the continuity and stability of energy transmission. When the frequency ratio is less than the first ratio or greater than or equal to the second ratio, it means that there is an obvious deviation in the current high-frequency output, and the adjustment mechanism needs to be entered to correct the frequency offset. Further, the analysis unit distinguishes the direction of the frequency offset, and thus adopts a two-way adjustment strategy. When the output frequency ratio is lower than the first preset ratio, it means that the current output frequency is too low, and the system needs to lower the output frequency. At this time, the analysis unit sets the adjustment coefficient range as M1 < M2 <...... < Mmax < 1 to gradually increase the output frequency; conversely, when the output frequency ratio is greater than or equal to the second preset ratio, it means that the current frequency is too high, and the system needs to increase the output frequency. The adjustment coefficient is set as 1 < N1 < N2 <...... < Nmax to control the frequency to decrease. Through this piecewise linear adjustment mechanism, the system can flexibly control the frequency change rate according to the actual offset degree to prevent overcorrection or frequency oscillation. To sum up, the technical principle described in this paragraph reflects the closed-loop feedback control mechanism of the analysis unit for the high-frequency output frequency. The system can not only judge the degree of frequency offset in real time, but also intelligently allocate the adjustment range and adjustment coefficient according to the offset direction and amplitude, so as to achieve high-precision and low-latency automatic frequency tracking control. This technology significantly improves the adaptive ability of the high-frequency steam ablation system and effectively guarantees the accuracy of tissue heating and the stability of the treatment effect.

[0077] As can be seen, by setting the ratio of the first and second preset output frequencies, the system can quickly identify whether the frequency deviates from the acceptable range, avoiding issues such as reduced energy transfer efficiency and uneven heating caused by frequency detuning. This precise frequency ratio determination mechanism improves the system's sensitivity and response speed to frequency anomalies. Secondly, a bidirectional adjustment strategy is employed, with corresponding adjustment ranges set for different frequency deviation directions. When the frequency ratio falls below the first preset value, the frequency is increased by gradually increasing the adjustment coefficient; when the frequency ratio exceeds the second preset value, the frequency is decreased by the adjustment coefficient. This flexible adjustment mechanism ensures smooth and stable frequency adjustment, effectively avoiding frequency jumps or oscillations, and improving the system's stable operation performance. Furthermore, this technology significantly enhances the adaptability and robustness of the steam ablation system. Regardless of changes in load impedance, the system dynamically adjusts the output frequency to ensure it always maintains the optimal resonant state, improving heating efficiency and therapeutic efficacy while reducing energy waste and potential risks during treatment.

[0078] In the above-described embodiment, by providing a high-precision detection module, the system can continuously monitor the impedance changes of the steam generator's connected load, the output frequency of the high-frequency power supply, and the steam output temperature of the steam generator in real time, providing the system with rich and accurate operational status information. This multi-dimensional data acquisition method provides a solid data foundation for subsequent automatic control and effectively improves the system's ability to perceive dynamic load changes. Secondly, by comprehensively analyzing and processing the collected data with the help of the control module, the system can accurately determine the optimal operating parameters under the current load state and automatically adjust the output power of the high-frequency power supply to ensure that the steam generator always operates stably within the optimal resonant frequency range. This automatic adjustment function greatly reduces the need for human intervention, improves the flexibility and adaptability of the system's operation, and significantly enhances heating efficiency and treatment effectiveness. Finally, the system can effectively address the challenges posed by individual differences in human tissue and changes in tissue state during treatment, ensure the stability of steam temperature and power output, avoid energy waste and treatment deviation caused by frequency detuning, and thus enhance the safety and reliability of treatment. Overall, the present invention realizes intelligent and automated control of high-frequency heating steam ablation systems, promotes the advancement of medical device technology, and improves the precision and effectiveness of clinical treatment.

[0079] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0080] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0081] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0082] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A high-frequency steam ablation system with automatic frequency tracking function, characterized in that: include: a high-frequency power supply configured to generate high-frequency alternating current; a steam generator, electrically connected to the high-frequency power supply, for evaporating the internal liquid into high-temperature steam through high-frequency alternating current; The puncture ablation needle is connected to the steam generator and is used to introduce high-temperature steam into the target tissue site; a detection module, connected to the high-frequency power supply and the steam generator, respectively, and configured to obtain impedance change data of a load connected to the steam generator, an output frequency of the high-frequency power supply, and an output steam temperature of the steam generator; a control module electrically connected to the detection module and the high-frequency power supply, respectively, and configured to determine the output power of the high-frequency power supply based on impedance change data of a load connected to the steam generator, an output frequency of the high-frequency power supply, and an output steam temperature of the steam generator; The detection module includes: An impedance detection unit is disposed inside the steam generator, and is configured to detect impedance data of a load connected to the steam generator; a temperature detection unit, disposed inside the steam generator, configured to detect the real-time steam temperature inside the steam generator and the output steam temperature of the steam generator; A frequency detection unit is configured in an output path of the high-frequency power supply, and is configured to detect a real-time output frequency of the high-frequency alternating current output by the high-frequency power supply; The control module includes: a collection unit electrically connected to the impedance detection unit, the temperature detection unit, and the frequency detection unit, respectively, and configured to obtain impedance data of a load connected to the steam generator, a real-time steam temperature inside the steam generator, an output steam temperature of the steam generator, and a real-time output frequency of the high-frequency alternating current; an analysis unit electrically connected to the acquisition unit, the analysis unit being configured to obtain data information of the tissue to be ablated, and determine a preset output frequency based on the data information of the tissue to be ablated, impedance data of a load connected to the steam generator, a real-time steam temperature inside the steam generator, and an output steam temperature of the steam generator, and the analysis unit being further configured to determine an adjustment coefficient based on a relationship between the preset output frequency and the real-time output frequency of the high-frequency alternating current; a central control unit electrically connected to the analysis unit and the high-frequency power supply, the central control unit being configured to generate a control instruction according to the adjustment coefficient and control the high-frequency power supply to output high-frequency alternating current according to the control instruction; When the analysis unit is used to determine the preset output frequency: The analyzing unit is further configured to determine the size of the tissue to be ablated and the location of the ablated tissue based on the data information of the tissue to be ablated, and determine the ablation duration and ablation temperature based on the size of the tissue to be ablated and the location of the ablated tissue; The analysis unit is further configured to obtain an absolute value of a temperature difference between the ablation temperature and the output steam temperature, and determine whether to adjust the real-time steam temperature based on a relationship between the absolute value of the temperature difference and a preset temperature threshold configured by the analysis unit: When the absolute value of the temperature difference is lower than or equal to the preset temperature threshold, the analysis unit determines not to adjust the real-time steam temperature, and sets the high-frequency alternating current frequency corresponding to the real-time steam temperature as the preset output frequency; When the absolute value of the temperature difference is higher than the preset temperature threshold, the analysis unit determines the adjustment coefficient based on the temperature difference between the ablation temperature and the output steam temperature, and determines the high-frequency AC frequency adjusted by the adjustment system as the preset output frequency.

2. The high-frequency heating steam ablation system with automatic frequency tracking function according to claim 1, characterized in that: When used to determine the adjustment factor, the analysis unit includes: The analysis unit is further configured to determine an adjustment coefficient according to a relationship between the temperature difference and a first preset temperature difference and a second preset temperature difference configured by the analysis unit: When the temperature difference is lower than the first preset temperature difference absolute value, the analysis unit determines the adjustment coefficient to be L1; When the temperature difference is higher than the first preset temperature difference and lower than or equal to the second preset temperature difference, the analysis unit determines the adjustment coefficient to be L2; When the temperature difference is higher than the second preset temperature difference, the analysis unit determines the adjustment coefficient to be L3; The first preset temperature difference is smaller than the second preset temperature difference, and L1>1>L2>L3.

3. The high-frequency heating steam ablation system with automatic frequency tracking function according to claim 2, characterized in that: When the analyzing unit determines the preset output frequency, the analyzing unit is further configured to determine whether to correct the preset output frequency according to impedance data of a load connected to the steam generator.

4. The high-frequency heating steam ablation system with automatic frequency tracking function according to claim 3, characterized in that: The analyzing unit determines whether to correct the preset output frequency based on the relationship between the resonant frequency of the load connected to the steam generator and the preset resonant frequency, including: When the resonant frequency is consistent with the preset resonant frequency, the analysis unit determines that the preset output frequency does not need to be corrected; When the resonant frequency is inconsistent with the preset resonant frequency, the analyzing unit determines a correction coefficient according to the resonant frequency difference between the resonant frequency and the preset resonant frequency, and corrects the preset output frequency according to the correction coefficient.

5. The high-frequency heating steam ablation system with automatic frequency tracking function according to claim 4, characterized in that: The analysis unit determines the correction coefficient according to the resonant frequency difference between the resonant frequency and the preset resonant frequency, including: The analysis unit is further configured to determine a correction coefficient according to a relationship between the resonant frequency difference and a first preset resonant frequency difference and a second preset resonant frequency difference configured by the analysis unit: When the resonant frequency difference is lower than the first preset resonant frequency difference absolute value, the analysis unit determines the correction coefficient as K1; When the resonant frequency difference is higher than the first preset resonant frequency difference and the resonant frequency difference is lower than or equal to the second preset resonant frequency difference, the analysis unit determines the correction coefficient to be K2; When the resonant frequency difference is higher than the second preset resonant frequency difference, the analysis unit determines the correction coefficient as K3; The first preset resonant frequency difference is smaller than the second preset resonant frequency difference, and K1>1>K2>K3.

6. The high-frequency heating steam ablation system with automatic frequency tracking function according to claim 1, characterized in that: The analysis unit determines the adjustment coefficient based on the relationship between the preset output frequency and the real-time output frequency of the high-frequency alternating current, including: The analyzing unit is configured to determine whether to adjust the real-time output frequency of the high-frequency alternating current based on an output frequency ratio between the preset output frequency and the real-time output frequency of the high-frequency alternating current, and based on a relationship between the output frequency ratio and a first preset output frequency ratio and a second preset output frequency ratio configured by the analyzing unit: When the output frequency ratio is less than the first preset output frequency ratio, or the output frequency ratio is greater than or equal to the second preset output frequency ratio, the analysis unit determines to adjust the real-time output frequency of the high-frequency alternating current; When the output frequency ratio is greater than or equal to the first preset output frequency ratio and is less than the second preset output frequency ratio, the analysis unit determines not to adjust the real-time output frequency of the high-frequency alternating current.

7. The high-frequency heating steam ablation system with automatic frequency tracking function according to claim 6, characterized in that: When the analysis unit determines to adjust the real-time output frequency of the high-frequency alternating current, it includes: When the output frequency ratio is less than the first preset output frequency ratio, the analysis unit determines that the adjustment system range for adjusting the real-time output frequency of the high-frequency alternating current is: M1<M2…<Mmax<1; When the output frequency ratio is greater than or equal to the second preset output frequency ratio, the analysis unit determines that the adjustment range of the real-time output frequency of the high-frequency alternating current is: 1<N1<N2 . . . <Nmax.

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