Thermal vapor treatment system and method for treating benign prostatic hyperplasia

Abstract

The present application relates to the technical field of medical devices, and discloses a hot steam treatment system and method for treating prostatic hyperplasia, comprising a host computer, a treatment handle assembly, a steam generation assembly, a precision injection assembly, a fluid pipeline assembly and a control system. The treatment handle assembly comprises a sheath tube, a steam ablation needle, a needle insertion and withdrawal mechanism and a cystoscope. The precision injection assembly adopts a closed-loop stepper motor, position feedback and pressure detection to realize closed-loop control of injection. The steam generation assembly adopts frequency tracking heating technology to realize dynamic adjustment of the hot steam generation process. The system is also provided with a bubble detection and needle withdrawal position detection module, and a multi-parameter collaborative control mechanism of injection flow, heating power, steam temperature and steam pressure is established to realize closed-loop control of the hot steam generation and ablation treatment process, and improve the controllability, safety and adaptability of the treatment process.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a hot steam therapy system and method for treating benign prostatic hyperplasia. Background Technology

[0002] Benign prostatic hyperplasia (BPH) is a common urinary system disease among middle-aged and elderly men, and its incidence is continuously increasing with the aging population. To improve patients' urinary function and reduce the trauma risks of traditional surgery, minimally invasive treatment techniques have developed rapidly. Among these, steam therapy delivers high-temperature steam to the enlarged prostatic tissue, using the heat energy released by the steam to cause coagulation and necrosis of the target tissue, thereby reducing the volume of the enlarged tissue and improving urethral obstruction. Due to its advantages of minimal trauma, rapid recovery, and ease of operation, steam therapy is gradually becoming an important development direction in the field of BPH treatment.

[0003] Currently, thermal steam therapy systems typically include a steam generation unit, a delivery control unit, and a treatment execution unit. During treatment, the system converts liquid into steam via a heating device, which is then delivered to the target tissue through a delivery channel and treatment needle to complete the treatment. To ensure treatment effectiveness, some devices have begun to be equipped with temperature detection, pressure monitoring, and basic control modules to control the parameters of the steam generation process, thereby achieving quantitative output of thermal steam and tissue ablation.

[0004] However, existing steam therapy systems still have many shortcomings. On the one hand, some devices use traditional heating methods, requiring a long preheating time before steam generation, resulting in slow system startup response. Simultaneously, many employ fixed-frequency or fixed-power heating methods, failing to dynamically adjust energy output based on real-time operating conditions, leading to low thermal efficiency. On the other hand, existing systems have relatively simple internal control strategies, making it difficult to establish real-time closed-loop regulation mechanisms between parameters such as temperature, pressure, and flow rate. This results in insufficient steam output stability, limiting the overall system response speed and control accuracy. Furthermore, some devices require high precision in consumable assembly, and the steam temperature generated by different consumables varies significantly. Current technology lacks adaptive compensation capabilities for these consumable differences, further affecting treatment consistency. Additionally, most systems lack bubble detection and needle position detection functions, failing to promptly detect abnormal steam delivery or needle position deviations, thus impacting treatment safety and the stability of treatment efficacy.

[0005] Therefore, there is an urgent need to provide a hot steam therapy system and method for treating benign prostatic hyperplasia, in order to improve steam generation efficiency and thermal energy utilization, construct a real-time closed-loop control mechanism for temperature, pressure and flow parameters, realize adaptive adjustment for different consumable operating conditions, and enhance the real-time monitoring capability of bubble state and needle position, thereby improving system response speed, operational stability, and treatment safety and accuracy. Summary of the Invention

[0006] In view of this, the present invention proposes a hot steam therapy system and method for treating benign prostatic hyperplasia, aiming to solve the technical problems existing in the current hot steam therapy system, such as low steam generation efficiency, insufficient heat energy utilization, lack of real-time coordinated adjustment mechanism for temperature, pressure and flow parameters, weak adaptive compensation capability for consumable differences, and lack of real-time monitoring capability for needle position.

[0007] The hot steam therapy system for treating benign prostatic hyperplasia proposed in this invention includes a main unit, a treatment handle assembly, a steam generating assembly, an injection assembly, a fluid conduit assembly, and a control system. The treatment handle assembly is used to hold and manipulate the steam ablation needle; the steam generating assembly is used to convert sterile water into hot steam; the injection assembly is used to push sterile water; the fluid conduit assembly is used to deliver sterile water and saline solution; and the control system is connected to the injection assembly, the steam generating assembly, and the treatment handle assembly, and is used for closed-loop control of the liquid delivery, hot steam generation, and ablation treatment process.

[0008] Furthermore, the treatment handle assembly includes a sheath, a tip, a steam ablation needle, a needle withdrawal button, a needle retraction button, a flushing button, a sheath clamp, an ablation button, a cable assembly, and a cystoscope. The sheath provides a sealed guide channel for the steam ablation needle, steam delivery tubing, cystoscope, and flushing tubing. The tip is located at the front end of the sheath and guides the steam ablation needle into the treatment area; the tip also includes a puncture needle structure for assisting tissue puncture. The steam ablation needle is located axially within the sheath. The treatment handle assembly includes a needle withdrawal button and a needle retraction button. The needle extension button is used to drive the steam ablation needle to extend from the sheath and pierce the target prostate tissue, while the needle retraction button is used to drive the steam ablation needle to retract back into the sheath. The treatment handle assembly also has a flushing button to control the delivery of flushing fluid to the treatment area via the flushing tubing. The sheath clamp is located at the connection between the sheath assembly and the treatment handle assembly. When the needle retraction button fails, the sheath assembly is separated from the treatment handle body by disengaging the sheath clamp, and the steam ablation needle can be manually retrieved back into the sheath to achieve emergency retrieval of the steam ablation needle.

[0009] Furthermore, the fluid piping assembly includes a water delivery cylinder, a double-layer water delivery tube, a saline flushing tube, a stop clamp, and a drain tube. The water delivery cylinder stores and delivers saline solution. The double-layer water delivery tube connects to the treatment handle assembly and delivers the therapeutic steam medium and saline solution separately. The saline flushing tube delivers saline solution to the treatment area. The treatment handle assembly has a flushing button to control saline flushing. A single trigger of the flushing button enters the normal flushing mode, while continuous triggering within a preset time window enters the high-speed flushing mode. A stop clamp is located on the saline flushing tube and the drain tube, controlling their opening and closing. The drain tube drains fluid from the bladder.

[0010] Furthermore, the injection assembly includes a closed-loop stepper motor, a lead screw drive mechanism, an injection slider, a position feedback component, and a pressure detection component. Specifically: the closed-loop stepper motor converts rotary motion into linear motion based on the lead screw drive mechanism, driving the injection slider to move and thus propel the water delivery cylinder to deliver sterile water; the position feedback component includes a potentiometer that moves synchronously with the injection slider, used to detect the position of the injection slider in real time and feed the position signal back to the control system to form a system-level closed-loop position control; the control system adjusts the operating parameters of the closed-loop stepper motor in real time based on the deviation between the target displacement and the actual displacement to compensate for the stepping error generated during the stepper motor's operation and improve the injection flow control accuracy; the pressure detection component includes a pressure sensor located at the tail of the injection rod, used to detect the force state of the injection rod in real time and monitor the working pressure of the high-pressure injection pipeline based on force changes; when the detected pressure value exceeds a preset threshold, the control system reduces the injection speed or stops injection.

[0011] Furthermore, the steam generating assembly includes a frequency tracking heating module, a temperature detection module, a bubble detection module, and a needle position detection module. The frequency tracking heating module includes a high-frequency power drive circuit, a resonant detection circuit, an impedance matching network, and a frequency tracking algorithm. This module adjusts the heating frequency in real time according to the resonant state, keeping the steam generating assembly in the optimal resonant heating state. It also performs closed-loop control of the hot steam generation process based on control signals transmitted through the cable assembly and thermocouple temperature detection signals. The frequency tracking heating module is also configured to detect impedance changes, calculate the current resonant frequency, and adjust the drive frequency to track the optimal resonant point in real time. When the parameters of the heating system components change, the frequency tracking heating module automatically adjusts the drive frequency to compensate for parameter drift. The temperature detection module... The measurement module includes a thermocouple temperature sensor, which is used to detect the internal temperature of the heating chamber and the steam outlet temperature in real time, and feeds the temperature signal back to the control system. The control system dynamically adjusts the output power of the frequency-tracking heating module according to the deviation between the real-time temperature and the target temperature, so that the steam temperature is stabilized within ±2℃ of the set temperature. The bubble detection module is used to detect bubbles and abnormal steam quality during the water delivery process. When abnormal bubbles are detected, the control system immediately stops the steam output and issues an alarm signal to prevent air embolism or abnormal steam quality. The needle position detection module is used to detect the needle exit and retraction status of the steam ablation needle. When the steam ablation needle is detected as not being accurately exited or not being properly retracted, the control system prohibits the start of steam output to ensure the safety of the treatment process.

[0012] Furthermore, the control system is equipped with a push-in closed-loop control algorithm, a frequency-tracking heating closed-loop control algorithm, and a multi-parameter collaborative control algorithm. Specifically: the push-in closed-loop control algorithm is configured to calculate the push-in flow rate error based on the position feedback signal output by the position feedback component and the pressure feedback signal output by the pressure detection component, and adjust the operating speed of the closed-loop stepper motor in real time according to the push-in flow rate error; the frequency-tracking heating closed-loop control algorithm is configured to calculate the resonant frequency of the heating system in real time based on the resonant detection signal output by the resonant detection circuit, and dynamically adjust the driving frequency of the frequency-tracking heating module to determine that the heating system operates in the optimal resonant state; the multi-parameter collaborative control algorithm is configured to collaboratively adjust the push-in component and the steam generation component based on real-time parameters of the push-in flow rate, heating power, and steam pressure to maintain the stability and consistency of the steam output process.

[0013] Furthermore, the control system establishes a dynamic response model for injection based on the position feedback component and the pressure detection component. It adopts a control strategy that combines feedforward compensation and feedback correction. It predicts the change in injection load according to the target injection curve and dynamically corrects the drive frequency, speed and acceleration of the closed-loop stepper motor by combining real-time position deviation and pressure deviation. Among them, the control system adopts high-speed sampling and real-time interpolation control to compensate online for the mechanical lag, inertial error of the screw drive mechanism and the pressure disturbance of the injection pipeline, so as to realize the dynamic closed-loop regulation of the injection process.

[0014] Furthermore, the control system establishes a multi-parameter coupled control model between heating power, resonant frequency, steam temperature, injection flow rate, and steam pressure. During the preheating process, the control system adjusts the output power and driving frequency of the high-frequency power drive circuit in real time based on the temperature change rate, impedance change rate, and resonant frequency offset of the heating cavity. During the steam output process, the control system coordinates the output power and driving frequency of the frequency tracking heating module and the injection parameters of the injection component based on the temperature feedback signal and pressure detection signal output by the thermocouple temperature sensor, and performs dynamic compensation control on the heating power and injection flow rate based on the steam pressure change.

[0015] Furthermore, the treatment handpiece assembly and the main unit are connected via a cable assembly, which includes a power line, a control signal line, a temperature detection signal line, and a ground wire. The control signal line and the temperature detection signal line adopt independent shielding structures and are housed within a multi-layer shielded cable. Each shielding layer is connected to the system ground wire to form an electromagnetic shielding loop. The cable assembly is used to realize the power supply, control signal transmission, and temperature detection signal transmission between the main unit and the treatment handpiece assembly.

[0016] Compared with existing technologies, the advantages of this invention lie in the integrated design of the treatment handle assembly, steam generation assembly, injection assembly, fluid conduit assembly, and control system, which constructs a collaborative closed-loop control system for liquid delivery, hot steam generation, and tissue ablation. Specifically, the injection assembly enables precise delivery of sterile water, the steam generation assembly enables real-time generation of hot steam, the treatment handle assembly enables precise positioning of the steam ablation needle and treatment operation, and the control system dynamically adjusts and coordinates the injection, heating, and ablation processes based on multi-parameter feedback. This achieves real-time matching of hot steam output parameters with ablation process parameters, improving the controllability and consistency of the treatment process. Simultaneously, the collaborative work between the fluid delivery, steam generation, and treatment execution modules forms a complete closed-loop treatment chain, which helps ensure the stable operation and safety of the hot steam ablation treatment process.

[0017] On the other hand, this application also provides a hot steam treatment method for treating benign prostatic hyperplasia, including: installing a treatment handle assembly, a water delivery system, a steam generation assembly, and a cystoscope assembly; performing infusion irrigation, tubing venting, temperature calibration, and functional self-testing; observing prostate tissue using a cystoscope to determine the ablation location and adjusting the needle exit direction of the steam ablation needle; controlling the steam ablation needle to penetrate the target tissue, activating the injection assembly and frequency-tracking heating module to convert the delivered sterile water into hot steam, and delivering the hot steam to the benign prostatic hyperplasia tissue for ablation treatment; stopping steam output, retrieving the steam ablation needle, rinsing and draining the treatment area, and completing the treatment process.

[0018] Furthermore, when controlling the steam ablation needle to penetrate the target tissue, activating the injection component and the frequency-tracking heating module, converting the delivered sterile water into hot steam, and delivering the hot steam to the prostatic hyperplasia tissue for ablation treatment, the process includes: establishing a closed-loop control model for injection based on the position and pressure feedback signals of the injection component, and adjusting the driving parameters of the injection component in real time according to the deviation between the target injection parameters and the actual injection parameters; establishing a closed-loop control model for frequency-tracking heating based on the resonance detection signal of the steam generating component, dynamically adjusting the driving frequency of the frequency-tracking heating module according to the resonance frequency deviation of the heating system, and coordinating the heating power and injection parameters based on the temperature and pressure feedback signals.

[0019] It is understood that the hot steam therapy system and method for treating benign prostatic hyperplasia in the above embodiments of the present invention have the same beneficial effects, and will not be described again. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the structure of a hot steam therapy system for treating benign prostatic hyperplasia provided in an embodiment of the present invention; Figure 2 This is a structural block diagram of a hot steam treatment method for treating benign prostatic hyperplasia provided in an embodiment of the present invention; Figure 3 A schematic diagram of the hot steam treatment method for treating benign prostatic hyperplasia provided in an embodiment of the present invention; The components include: 1. Sheath; 2. Head end; 3. Steam ablation needle; 4. Sheath clamp; 5. Needle withdrawal button; 6. Flushing button; 7. Needle withdrawal button; 8. Ablation button; 9. Cable assembly; 10. Water infusion tube; 11. Cystoscopy; 12. Double-layer water infusion tube; 13. Saline flushing tube; 14. Stop clamp; 15. Drainage tube. Detailed Implementation

[0021] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 As shown in the embodiments of this application, a hot steam therapy system for treating benign prostatic hyperplasia is provided in some embodiments, including a main unit, a treatment handle assembly, a steam generating assembly, a precision injection assembly, a fluid conduit assembly, and a control system; the main unit provides the power source and control core of the system; the treatment handle assembly is used to hold and manipulate the steam ablation needle 3; the steam generating assembly is used to convert sterile water into hot steam; the precision injection assembly is used to achieve precise delivery of sterile water; the fluid conduit assembly is used to deliver sterile water and physiological saline; the control system is connected to the precision injection assembly, the steam generating assembly, and the treatment handle assembly respectively, and is used to realize closed-loop control of liquid delivery, hot steam generation, and ablation treatment process.

[0023] In the above embodiments, by connecting the control system to the precision injection component, the steam generation component, and the treatment handpiece component respectively, a closed-loop control of the entire process of liquid delivery, hot steam generation, and ablation treatment is achieved. Unlike existing technologies where each component operates independently and lacks coordinated control, the control system in this invention, as the core control unit, can collect the operating parameters of each component in real time and make comprehensive decisions based on a preset control algorithm. This enables coordinated adjustment of injection flow rate, heating power, steam temperature, and steam pressure, significantly improving the system's operational stability and the consistency of treatment effects.

[0024] Furthermore, the treatment handle assembly of the present invention includes a sheath 1, a head end 2, a steam ablation needle 3, a sheath clamp 4, a needle withdrawal button 5, a flushing button 6, a needle withdrawal button 7, an ablation button 8, a cable assembly 9, and a cystoscope 11; the sheath 1 is used to provide a sealed channel for the steam ablation needle 3, the steam delivery pipeline, the cystoscope 11, and the flushing pipeline; the head end 2 is located at the front end of the sheath 1 and is used to guide the steam ablation needle 3 into the treatment area, and is provided with a puncture needle structure.

[0025] In a specific embodiment, the sheath 1 is made of medical-grade stainless steel or titanium alloy, with a smooth inner wall and good sealing performance to effectively prevent steam leakage. The internal channel of the sheath 1 is designed with a multi-layer structure. The innermost layer is used for the reciprocating motion of the steam ablation needle 3, the middle layer is used for steam delivery, and the outermost layer is used for the insertion of the cystoscope 11 and the irrigation tubing. The tip 2 is located at the front end of the sheath 1, and its tip is tapered to facilitate puncture into the prostate tissue. At the same time, steam injection holes are provided on the side wall of the tip 2 to uniformly inject hot steam into the hyperplastic tissue.

[0026] Furthermore, the steam ablation needle 3 of the present invention can reciprocate inside the sheath 1. The treatment handle is provided with a needle extension button 7 and a needle retraction button 5. The needle extension button 7 is used to drive the steam ablation needle 3 to extend out of the sheath 1 and pierce the target area of ​​the prostate tissue. The needle retraction button 5 is used to drive the steam ablation needle 3 to retract into the sheath 1.

[0027] In this specific implementation, both the needle ejection button 7 and the needle retraction button 5 employ electromagnetic drive mechanisms. When the needle ejection button 7 is pressed, the drive motor rotates forward, propelling the steam ablation needle 3 forward along the axis of the sheath 1 via a lead screw transmission mechanism, causing the needle tip of the steam ablation needle 3 to pierce the prostatic hyperplasia tissue. When the needle retraction button 5 is pressed, the drive motor rotates in the reverse direction, withdrawing the steam ablation needle 3 from the tissue and retracting it into the sheath 1. To ensure the accuracy of the needle ejection and retraction actions, a position sensor is installed at the base of the steam ablation needle 3 to detect the position of the needle tip in real time and feed the position signal back to the control system. When the position sensor detects that the needle tip has reached the target position, the control system automatically stops the drive motor, achieving precise control of the needle ejection depth.

[0028] Furthermore, the sheath clip 4 of the present invention is disposed on the sheath 1 assembly. When the needle withdrawal button 5 fails, the sheath 1 assembly is separated from the treatment handle by disassembling the sheath clip 4, and the steam ablation needle 3 is manually retracted into the sheath 1.

[0029] In this specific implementation, the sheath clamp 4 adopts a snap-on design, with one end fixed to the grip of the treatment handle and the other end detachably connected to the sheath 1. When the needle withdrawal button 5 malfunctions, the operator first presses the release button of the sheath clamp 4 to unlock it, and then pulls the sheath 1 assembly out of the treatment handle as a whole. At this time, the steam ablation needle 3 is exposed, and the operator can directly pull the steam ablation needle 3 manually to retract it into the sheath 1. This mechanical retrieval design ensures that the ablation needle can still be safely retrieved in the event of electrical control failure, avoiding the risk of the needle remaining in the patient's body.

[0030] Furthermore, the fluid piping assembly of the present invention includes a water delivery cylinder 10, a double-layer water delivery pipe 12, a saline flushing pipe 13, a water-stopping clamp 14, and a drain pipe 15; the flushing button 6 is used to control saline flushing, wherein a single trigger enters the normal flushing mode, and continuous triggering within a preset time enters the high-speed flushing mode; the water-stopping clamp 14 is used to control the opening or closing of the saline flushing pipe 13 and the drain pipe 15, and the drain pipe 15 is used to drain the fluid in the bladder.

[0031] In this specific embodiment, the water delivery cylinder 10 is a disposable sterile consumable with a capacity of 50 mL, and the cylinder body is made of medical-grade polypropylene material. The double-layer water delivery tube 12 includes an inner water delivery tube and an outer insulation tube. The inner water delivery tube is used to deliver sterile water, and the outer insulation tube is used to maintain the water temperature and prevent heat loss during delivery. The saline flushing tube 13 is independent of the water delivery cylinder 10 and the operation of the flushing pump is controlled by the flushing button 6. When the operator presses the flushing button 6 once, the controller controls the flushing pump to operate in a preset conventional flushing mode, so that the saline is delivered at a preset conventional flushing flow rate; when the controller detects that the operator has continuously triggered the flushing button 6 within a preset time window, it controls the flushing pump to switch to a high-speed flushing mode, increasing the flushing flow rate of the saline to quickly remove blood, tissue debris and other residues in the bladder and improve flushing efficiency. The stop clamp 14 controls the flow state of the tubing by clamping or loosening. When the stop clamp 14 on the saline flushing tubing 13 is opened and the stop clamp 14 on the drain tubing 15 is closed, the flushing fluid enters the patient's bladder to achieve the flushing function. When the stop clamp 14 on the drain tubing 15 is opened, the fluid in the patient's bladder is discharged through the drain tubing 15, thereby completing the discharge of the flushing fluid and bladder contents.

[0032] The precision injection assembly of the present invention includes a closed-loop stepper motor, a lead screw transmission mechanism, an injection slider, a position feedback component, and a pressure detection component. The precision injection assembly uses a closed-loop stepper motor as a drive source and converts rotary motion into linear motion through the lead screw transmission mechanism, driving the injection slider to move the water delivery cylinder 10 to complete the precision injection of sterile water.

[0033] In a specific implementation, the closed-loop stepper motor is a two-phase hybrid stepper motor, possessing the output torque and step resolution required for precise liquid injection. A built-in photoelectric encoder is used to acquire the motor's rotational status in real time and provide position feedback. The lead screw drive mechanism includes a lead screw and a nut. The lead screw has a preset lead, and the nut is fixedly connected to the injection slider, converting the rotational motion of the closed-loop stepper motor into the linear motion of the injection slider. When the closed-loop stepper motor completes one motion cycle, the lead screw drive mechanism drives the injection slider to produce a corresponding linear displacement according to a preset motion relationship, thereby achieving precise injection control of the syringe plunger.

[0034] Furthermore, the position feedback component of the present invention employs a potentiometer ruler, which moves synchronously with the injection slider to detect the position of the injection slider in real time and feed the position signal back to the control system to form a system-level position closed-loop control. The control system adjusts the operating parameters of the closed-loop stepper motor in real time according to the deviation between the target displacement and the actual displacement to compensate for the step loss error generated during the operation of the stepper motor and improve the injection flow control accuracy.

[0035] In a specific implementation, the stroke length of the potentiometer corresponds to the effective injection stroke of the water delivery cylinder 10, and its output resistance value has a linear relationship with the displacement of the injection slider. The control system reads the resistance value of the potentiometer in real time according to a preset sampling period, and converts the resistance value into the corresponding displacement through signal conversion processing, so as to obtain the movement position of the injection slider in real time, providing position data support for the main controller to perform position feedback, injection volume calculation and closed-loop control.

[0036] Let the target displacement be The measured displacement is Then the positional deviation It can be represented as: The control system based on position deviation The pulse frequency of the closed-loop stepper motor is corrected using a PID control algorithm. ; in, The corrected pulse frequency. The reference pulse frequency, , , These are the proportional, integral, and differential coefficients, respectively.

[0037] With this position closed-loop control strategy, the control system can ensure the accuracy of the injection displacement even under load changes or external disturbances, and compensate for the stepper motor's step loss error during operation, thereby achieving high-precision injection flow control.

[0038] Furthermore, the pressure detection component of the present invention includes a pressure sensor disposed at the tail of the injection rod, for real-time detection of the force state of the injection rod, and monitoring the working pressure of the high-pressure injection pipeline according to the force change; when the pressure value detected by the pressure sensor exceeds a preset threshold, the control system automatically reduces the injection speed or stops injection to prevent pipeline rupture or abnormal steam output.

[0039] In this specific implementation, a strain gauge pressure sensor is used, with a range of 0-5 kg ​​and an accuracy of ±0.5% FS. The pressure sensor is located at the connection between the injection rod and the water delivery cylinder 10, enabling real-time monitoring of the pressure within the injection pipeline. When the pressure value detected by the sensor exceeds a preset first pressure threshold, the control system determines that there may be blockage or excessive flow resistance in the injection pipeline and automatically reduces the injection speed to decrease the injection pressure and improve the safety of the injection process. When the pressure value further exceeds a preset second pressure threshold, the control system determines that there is a high safety risk in the injection process and immediately executes corresponding safety protection strategies, including stopping injection, triggering an alarm, or entering a protection state, to avoid pipeline damage or affecting injection safety due to continuously rising pressure. The control system immediately stops injection and issues an alarm signal to remind operators to check for any abnormalities in the pipeline. This pressure protection mechanism effectively prevents the risk of steam leakage or scalding due to pipeline rupture.

[0040] The steam generating assembly of the present invention includes a frequency tracking heating module, a temperature detection module, a bubble detection module, a needle position detection module, and a control module. The frequency tracking heating module includes a high-frequency power drive circuit, a resonant detection circuit, an impedance matching network, and a frequency tracking algorithm. The control module adjusts the heating frequency in real time according to the resonant state of the heating system to keep the steam generating assembly in the optimal heating state, and transmits control signals and thermocouple temperature detection signals through the cable assembly 9 to realize closed-loop control of the hot steam generation process.

[0041] In this specific implementation, the frequency tracking heating module operates using a full-bridge resonant converter topology. The high-frequency power drive circuit employs a digital signal processor (DSP) as its control core, capable of generating high-frequency PWM pulse signals. The resonance detection circuit includes a current transformer and a voltage sampling circuit for real-time detection of the resonant state of the heating circuit. The impedance matching network uses an L-shaped filter network to achieve impedance matching between the power supply and the heating load, reducing energy reflection. The frequency tracking algorithm employs an adaptive frequency adjustment strategy, automatically adjusting the drive frequency when device parameters change, ensuring the system always operates at the optimal resonant point.

[0042] Furthermore, the working process of the frequency tracking heating module of the present invention is as follows: detecting the impedance change of the heating system, calculating the current resonant frequency, adjusting the driving frequency so that the system tracks the optimal resonant point in real time and maintains the maximum heating efficiency; when the device parameters change, the frequency tracking heating module automatically adjusts the frequency to compensate for parameter drift and ensures that the steam temperature is stable within the preset range.

[0043] In a specific implementation, the frequency tracking process of the frequency tracking heating module is as follows: First, the resonant detection circuit samples the current of the heating circuit in real time. and voltage Calculate the impedance of the current system. : ; Then, based on impedance Calculate the change in current resonant frequency Offset: ; in, The target impedance corresponding to the optimal resonance point. This is the impedance offset coefficient. Finally, the control system adjusts the frequency offset accordingly. For driving frequency Adjustments will be made: ; Through this real-time frequency tracking mechanism, the frequency-tracking heating module can always maintain the optimal resonance state, keeping the heating efficiency above 95%, which is significantly higher than the 70% to 80% efficiency of traditional fixed-frequency heating methods.

[0044] Furthermore, the steam generating assembly of the present invention also includes a bubble detection module for detecting bubbles and abnormal steam quality during the water supply process; when the bubble detection module detects abnormal bubbles, the control system immediately stops the steam output and issues an alarm signal to prevent air clogging or substandard steam quality.

[0045] In this specific implementation, the bubble detection module employs the ultrasonic detection principle, with an ultrasonic transmitter and receiver installed in the water supply pipeline. When ultrasonic waves pass through the pipeline, the presence of bubbles causes changes in the propagation speed and waveform of the waves. The bubble detection module analyzes the time and frequency domain characteristics of the ultrasonic signal in real time. When the detected bubble volume exceeds 0.1 mL or the number of bubbles exceeds a preset threshold, it immediately sends an abnormal signal to the control system. Upon receiving the abnormal signal, the control system immediately shuts down the frequency-tracking heating module, stops steam output, and issues an alarm notification to the operator via the display screen.

[0046] Furthermore, the steam generating assembly of the present invention also includes a needle position detection module for detecting whether the ablation needle is accurately fired and whether the needle tip is correctly retrieved; when the needle position detection module detects an abnormal needle tip position, the control system prohibits the start of steam output to ensure treatment safety.

[0047] In a specific implementation, the needle position detection module employs a non-contact electromagnetic induction detection structure. The magnetic induction sensor includes an excitation coil and an induction coil. A permanent magnet is mounted on the steam ablation needle 3, and the magnetic induction sensor is positioned correspondingly on the side wall of the sheath 1. The control system applies an excitation signal to the excitation coil, causing the induction coil to generate an induction signal. When the steam ablation needle 3 extends or retracts, the position of the permanent magnet relative to the magnetic induction sensor changes, resulting in a corresponding change in the amplitude of the output signal from the induction coil. The control system determines the position of the permanent magnet based on the change in the amplitude of the induction signal and accordingly judges whether the steam ablation needle 3 has completed the needle extension or retraction action. Steam output control is only allowed when the steam ablation needle 3 is determined to be in the preset firing position; otherwise, steam output is prohibited and an alarm signal is issued.

[0048] Furthermore, the temperature detection module of the present invention uses a thermocouple temperature sensor to detect the internal temperature of the heating cavity and the steam outlet temperature in real time, and feeds the temperature signal back to the control system; the control system dynamically adjusts the output power of the frequency tracking heating module according to the deviation between the real-time temperature and the target temperature, so that the steam temperature is stabilized within ±2℃ of the set temperature.

[0049] In this specific implementation, the thermocouple temperature sensor is a type K thermocouple with a temperature measurement range of 0℃ to 300℃ and an accuracy of ±1℃. A temperature sensor is installed inside the heating chamber to monitor the temperature of the heating area; another temperature sensor is installed at the steam outlet to monitor the actual output temperature of the steam. The control system employs a dual closed-loop temperature control strategy: the steam outlet temperature is used as the main closed-loop control target, and the heating chamber temperature is used as an auxiliary protection parameter. Let the target steam temperature be... The measured steam outlet temperature was Then the temperature deviation It can be represented as: ; The control system based on temperature deviation The output power of the frequency-tracking heating module is dynamically adjusted using a PI control algorithm. Through this closed-loop temperature control strategy, the steam temperature can be stabilized within ±2℃ of the set value, meeting the stringent temperature accuracy requirements of prostate hyperplasia tissue ablation treatment.

[0050] The control algorithm of the control system of this invention includes a push-in closed-loop control algorithm, a frequency-tracking heating closed-loop control algorithm, and a multi-parameter collaborative control algorithm. The push-in closed-loop control algorithm calculates the flow error based on position and pressure feedback signals and dynamically corrects the speed of the closed-loop stepper motor. The frequency-tracking heating closed-loop control algorithm adjusts the heating frequency in real time based on the resonance detection signal. The multi-parameter collaborative control algorithm coordinates the relationship between the push-in flow rate, heating power, and steam pressure to ensure the stability of steam output.

[0051] In a specific implementation, the core idea of ​​the multi-parameter collaborative control algorithm is to establish a collaborative control relationship between the injection flow rate, heating power, and steam pressure, and to dynamically adjust these parameters based on real-time collected parameter values. Let the target steam flow rate be... The measured steam flow rate was The flow deviation is then expressed as: The control system calculates the injection flow rate correction and heating power correction based on the flow rate deviation, steam pressure deviation, and temperature deviation, where: in, To adjust the injection flow rate, This is a correction amount for heating power. For steam pressure deviation, For temperature deviation, , , and This is the control factor.

[0052] Through the above control method, the control system dynamically and collaboratively adjusts the injection component and the frequency-tracking heating module based on the real-time detected flow, pressure and temperature parameters, thereby realizing closed-loop control of the steam generation process.

[0053] As a specific embodiment of the present invention, the precision injection component has high injection flow control accuracy and fast dynamic response capability. It can quickly and accurately adjust the liquid output flow according to the injection command of the control system to achieve stable and continuous precision injection control, thereby meeting the requirements for precise control and rapid response of steam flow during the ablation treatment of prostatic hyperplasia tissue, and improving the stability, treatment effect and safety of the steam treatment process.

[0054] In a specific implementation, the calculation method for the injection flow control accuracy is as follows. Let the injection time be... The injection displacement is The effective cross-sectional area of ​​the water delivery cylinder 10 is Then the injection flow It can be represented as: ; In a specific implementation, both the injection displacement and injection time employ high-precision closed-loop control. The control system adjusts the injection flow rate in real time based on the control results of the injection displacement and injection time, enabling the precision injection component to achieve high-precision flow control. Simultaneously, response time refers to the time elapsed from when the control system issues a control command to when the injection slider completes the target movement. By optimizing the control algorithm, closed-loop control strategy, and mechanical transmission structure design, the system possesses a fast dynamic response capability, enabling it to respond to control commands promptly and complete the injection action, thereby improving the real-time performance and stability of the liquid injection process.

[0055] As a specific embodiment of the present invention, the steam generating component has a short preheating time and can quickly complete the steam generation preparation after the system is started; at the same time, both the steam output temperature and the steam output pressure support continuous adjustment, and the control system can dynamically control the steam output temperature and steam output pressure according to different treatment needs to meet the steam output requirements under different treatment conditions.

[0056] In a specific implementation, preheating time refers to the time required from system startup to the steam temperature reaching the set temperature. Due to the use of frequency-tracking heating technology, the heating system can adjust its operating frequency in real time according to the heating status, ensuring the heating device always maintains optimal resonant operating conditions, improving the conversion efficiency of electrical energy to thermal energy, and thus shortening the system preheating time. The steam output temperature is controlled by adjusting the heating power, enabling the steam generating component to output steam at a temperature sufficient for treatment. The steam output pressure is regulated through the coordinated control of the injection flow rate and heating power, ensuring the steam generating component can stably output steam pressure meeting treatment requirements under different operating conditions, thereby adapting to the ablation requirements of different prostatic hyperplasia tissues.

[0057] In one specific embodiment of the present invention, the treatment handpiece assembly is connected to the main unit via a cable assembly 9, which includes a power line, a control signal line, a temperature detection signal line, and a ground line, and is designed with shielded cable to prevent electromagnetic interference.

[0058] In a specific implementation, the cable assembly 9 uses a multi-core shielded cable with no fewer than eight cores, including two power lines (rated voltage 24V, rated current 10A), four control signal lines (using RS-485 communication protocol), two temperature detection signal lines (using thermocouple compensation wire), and two ground wires. The shielding layer uses copper braided mesh, which can effectively suppress external electromagnetic interference and ensure the transmission quality of control signals and temperature detection signals.

[0059] Based on the above embodiments, in order to better enable those skilled in the art to fully understand and implement the present invention, the following is combined with... Figure 2-3And a specific application scenario further supplements the specific implementation principle of the present invention.

[0060] Taking a patient with benign prostatic hyperplasia undergoing ablation treatment using the hot steam therapy system described in this invention as an example, the working process of the hot steam therapy method for treating benign prostatic hyperplasia described in this invention will be explained.

[0061] First, in step S100, pre-treatment preparation is performed: the operator installs the treatment handle assembly in the designated position on the main unit, installs the water infusion tube 10 in the clamping mechanism of the precision injection assembly, connects the steam delivery pipeline of the steam generator assembly to the steam inlet of the treatment handle assembly, inserts the cystoscope 11 through the side channel of the sheath 1, and connects the saline irrigation tube 13 and the drain tube 15. After installation, quick-connect fittings are used at all pipeline connections to ensure reliable sealing.

[0062] Then, in step S200, an initialization operation is performed: the control system first drives the precision injection component to perform infusion, pushing sterile water from the water delivery cylinder 10 to the heating chamber of the steam generator component; at the same time, the control system controls the steam generator component to vent the pipeline, and vents the air in the pipeline through the vent valve; next, the control system calibrates the temperature sensor, compares the measured temperature with the standard temperature source, and calibrates the deviation value; finally, the control system performs a function self-test, detects the working status of each sensor, motor, and valve, and issues an alarm if an abnormality is detected.

[0063] In step S300, the prostate tissue is observed through the cystoscope 11 to determine the ablation location and adjust the needle direction: The operator inserts the cystoscope 11 into the bladder through the urethra to observe the degree and location of prostatic hyperplasia and determine the target area to be ablated; then, the direction of the tip 2 is adjusted by the direction adjustment knob on the treatment handle so that the steam ablation needle 3 can be accurately aligned with the target tissue.

[0064] In step S400, pressing the needle ejection button 7 causes the ablation needle to pierce the target tissue, activating the precision injection component and the frequency-tracking heating component to convert sterile water into hot steam and deliver it to the prostatic hyperplasia tissue. The operator presses the needle ejection button 7, and the control system drives the steam ablation needle 3 to move forward. After the needle tip pierces the prostatic hyperplasia tissue, the position sensor detects that the needle tip has reached the preset depth, and the control system automatically stops the needle ejection action. Subsequently, the control system activates the precision injection component and the frequency-tracking heating component. The precision injection component pushes sterile water to the heating chamber of the steam generating component according to the set flow rate, and the frequency-tracking heating component performs high-frequency resonant heating on the heating chamber, so that the sterile water is quickly converted into hot steam.

[0065] In the specific implementation of step S400, the precision injection component adjusts the injection speed in real time according to the deviation between the target injection flow rate and the actual injection flow rate to ensure the stability and injection accuracy of the liquid output. Let the target injection flow rate be the preset target injection flow rate, and the measured injection flow rate be... Then the flow deviation The control system adjusts based on flow deviation. The speed of the closed-loop stepper motor is dynamically corrected to ensure that the actual injection flow rate approaches the target value. Simultaneously, the frequency-tracking heating component adjusts the heating frequency in real time based on impedance changes detected by the resonance detection circuit, ensuring the heating system always operates at the optimal resonance point and maintains maximum heating efficiency. Hot steam generated by the steam generator is delivered to the tip of the steam ablation needle 3 via a steam delivery pipeline and then evenly injected into the prostatic hyperplasia tissue through the steam injection orifice at the needle tip, causing coagulation and necrosis of the hyperplasia tissue.

[0066] Meanwhile, the bubble detection module and the needle exit position detection module monitor the treatment status in real time. The bubble detection module uses ultrasonic detection to monitor for abnormal bubbles in the water supply line. Once an abnormal bubble is detected, it immediately sends a stop signal to the control system, which then immediately stops steam output and issues an alarm. The needle exit position detection module uses a magnetic induction sensor to monitor the needle position of the steam ablation needle 3 in real time, ensuring that the needle is in the correct firing position. If a deviation in the needle position is detected, the control system immediately stops steam output to prevent steam from being sprayed into non-target areas and causing tissue damage.

[0067] In step S500, the steam output is stopped, the ablation needle is retrieved, the treatment area is flushed, drainage is completed, and the procedure is ended: After the ablation treatment is completed, the operator presses the ablation button 8, the control system stops the operation of the precision injection component and the frequency-tracking heating component, and the steam output stops; then, the needle withdrawal button 5 is pressed, the control system drives the steam ablation needle 3 to withdraw from the tissue and be retrieved into the sheath 1; subsequently, the operator starts the saline flushing mode through the flushing button 6 to flush the blood and tissue debris in the bladder; after flushing is completed, the stopcock 14 is closed, the drain valve of the drain pipe 15 is opened, and the fluid in the bladder is drained; finally, the cystoscope 11 and the sheath 1 are withdrawn, and the procedure is ended.

[0068] Through the above application scenarios, the hot steam therapy system and method for treating benign prostatic hyperplasia described in this invention can achieve the following technical effects: Real-time tracking of the optimal resonance point via frequency-tracking heating technology ensures the heating system remains in its optimal operating state, significantly improving heat conversion efficiency and shortening preheating time to within a preset time; High-precision control of the injection flow rate is achieved through a closed-loop stepper motor combined with a position feedback component and a pressure detection component, ensuring that the flow control accuracy meets preset conditions and the response time is less than a preset time; Coordinated control of injection flow rate, heating power, steam temperature, and steam pressure is achieved through a multi-sensor closed-loop feedback mechanism, ensuring the stability and consistency of steam output; Abnormal states during treatment are monitored in real time through a bubble detection module and a needle exit position detection module, effectively preventing air embolism and needle position deviation, significantly improving treatment safety; The steam temperature and pressure are continuously adjustable within a preset temperature range and a preset pressure range, meeting the treatment needs of different lesion degrees; The entire treatment process is highly automated, easy to operate, allows for rapid recovery, is minimally invasive, and significantly improves the patient's quality of life.

[0069] Based on the above embodiments, by using a frequency-tracking heating module to track the optimal resonance point in real time, the steam generating components are always kept in an optimal heating state, significantly improving heat conversion efficiency, shortening preheating time, and extending equipment lifespan. Compared with existing heating methods that use fixed frequency or fixed power, this invention can automatically compensate for device parameter drift through an adaptive frequency tracking algorithm, ensuring efficient heating under different operating conditions.

[0070] Meanwhile, by employing a closed-loop stepper motor as the drive source in the precision injection assembly, combined with a position feedback component and a pressure detection component, high-precision closed-loop control of the injection flow rate is achieved. The position feedback component uses a potentiometer to detect the position of the injection slider in real time. The control system adjusts the drive parameters in real time based on the deviation between the target displacement and the actual displacement, effectively compensating for potential stepper motor step loss errors during operation. The pressure detection component monitors the working pressure of the injection pipeline in real time. When the pressure exceeds a preset threshold, it automatically reduces the injection speed or stops injection to prevent pipeline rupture or abnormal steam output.

[0071] Furthermore, by incorporating bubble detection and needle position detection modules, abnormal conditions during treatment can be monitored in real time. The bubble detection module, employing ultrasonic detection principles, can promptly detect abnormal bubbles in the water supply line, preventing air embolism or substandard steam quality. The needle position detection module, using magnetic induction sensing principles, can accurately detect the needle tip position of the steam ablation needle 3, ensuring that steam output is only initiated when the needle tip is in the correct firing position, thereby significantly improving treatment safety.

[0072] Furthermore, by employing a multi-parameter collaborative control algorithm for the control system, the relationship between injection flow rate, heating power, and steam pressure is coordinated to ensure the stability and consistency of steam output. Compared to existing technologies where parameters are controlled independently and lack coordinated adjustment, this invention establishes a mathematical relationship model between injection flow rate, heating power, and steam pressure, and dynamically corrects the relationship based on real-time feedback parameters, enabling the system to maintain stable steam output under complex operating conditions.

[0073] The entire treatment process is highly automated. From needle insertion and steam output to needle withdrawal and rinsing, everything is automatically executed by the control system according to a preset program. Operators only need to perform simple triggering operations via buttons, which not only improves treatment efficiency but also ensures the consistency and repeatability of treatment operations.

[0074] It is understood that the hot steam therapy system and method for treating benign prostatic hyperplasia in the above embodiments of the present invention adopt the above technical solutions and therefore have the same beneficial effects, which will not be repeated here.

[0075] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program goods. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program goods embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0076] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program goods according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0077] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0078] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0079] 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, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A hot steam therapy system for treating benign prostatic hyperplasia, characterized in that, It includes a main unit, a treatment handpiece assembly, a steam generator assembly, an injection assembly, a fluid tubing assembly, and a control system, wherein: The treatment handle assembly is used to hold and manipulate the steam ablation needle; The steam generating unit is used to convert sterile water into hot steam; The injection component is used to push sterile water; Fluid piping assemblies are used to deliver sterile water and saline solution; The control system is connected to the injection assembly, the steam generation assembly, and the treatment handpiece assembly, and is used for closed-loop control of liquid delivery, hot steam generation, and the ablation treatment process.

2. The hot steam therapy system for treating benign prostatic hyperplasia according to claim 1, characterized in that, The treatment handle assembly includes a sheath, a tip, a steam ablation needle, a needle withdrawal button, a needle retraction button, a flushing button, a sheath clip, an ablation button, a cable assembly, and a cystoscope, among which: The sheath is used to provide a sealed guide channel for steam ablation needles, steam delivery lines, cystoscopes, and irrigation lines; The head end is located at the front end of the sheath. The head end is used to guide the steam ablation needle into the treatment area, and the head end is equipped with a puncture needle structure for assisting tissue puncture. The steam ablation needle is positioned inside the sheath along its axial direction. The treatment handle assembly is equipped with a needle extension button and a needle retraction button. The needle extension button is used to drive the steam ablation needle to extend out of the sheath and pierce the target prostate tissue, while the needle retraction button is used to drive the steam ablation needle to retract into the sheath. The treatment handpiece assembly also has a flushing button to control the delivery of flushing fluid through the flushing tubing to the treatment area for flushing; The sheath clamp is located at the connection point between the sheath assembly and the treatment handle assembly. When the needle withdrawal button fails, the sheath assembly is separated from the treatment handle body by disengaging the sheath clamp, and the steam ablation needle is manually retrieved back into the sheath to achieve emergency retrieval of the steam ablation needle.

3. The hot steam therapy system for treating benign prostatic hyperplasia according to claim 2, characterized in that, The fluid piping assembly includes a water delivery cylinder, a double-layer water delivery pipe, a saline flushing pipe, a water-stop clamp, and a drain pipe, wherein: Water delivery cylinders are used to store and deliver sterile water; The double-layered water supply tube is connected to the treatment handpiece assembly. The double-layered water supply tube is used to deliver the treatment steam medium and sterile water respectively. The saline flushing tube is used to deliver saline to the treatment area. The treatment handle assembly is equipped with a flushing button, which is used to control the saline flushing. When the flushing button is triggered once, the normal flushing mode is entered. When the flushing button is triggered continuously within a preset time window, the high-speed flushing mode is entered. The water-stop clamp is installed on the saline flushing tube and the drain tube. The water-stop clamp is used to control the opening or closing of the saline flushing tube and the drain tube. A drain tube is used to drain fluid from the bladder.

4. The hot steam therapy system for treating benign prostatic hyperplasia according to claim 3, characterized in that, The injection assembly includes a closed-loop stepper motor, a lead screw drive mechanism, an injection slider, a position feedback assembly, and a pressure detection assembly, wherein: The closed-loop stepper motor converts rotary motion into linear motion based on the screw transmission mechanism, drives the injection slider to move, and drives the water delivery cylinder to complete the delivery of sterile water; The position feedback component includes a potentiometer ruler, which moves synchronously with the injection slider. The potentiometer ruler is used to detect the position of the injection slider in real time and feed the position signal back to the control system to form a system-level position closed-loop control. The control system adjusts the operating parameters of the closed-loop stepper motor in real time based on the deviation between the target displacement and the actual displacement, so as to compensate for the step loss error generated during the operation of the stepper motor and improve the control accuracy of the injection flow rate. The pressure detection component includes a pressure sensor located at the tail of the injection rod. The pressure sensor is used to detect the force state of the injection rod in real time and monitor the working pressure of the high-pressure injection pipeline according to the force changes. When the detected pressure value exceeds a preset threshold, the control system reduces the injection speed or stops the injection.

5. The hot steam therapy system for treating benign prostatic hyperplasia according to claim 4, characterized in that, The steam generating assembly includes a frequency-tracking heating module, a temperature detection module, a bubble detection module, and a needle position detection module, wherein: The frequency tracking heating module includes a high-frequency power drive circuit, a resonance detection circuit, an impedance matching network, and a frequency tracking algorithm. The frequency tracking heating module adjusts the heating frequency in real time according to the resonance state to keep the steam generating component in the optimal resonance heating state. It also performs closed-loop control of the hot steam generation process based on the control signal transmitted by the cable assembly and the thermocouple temperature detection signal. The frequency tracking heating module is also configured to detect the impedance change of the frequency tracking heating module, calculate the current resonant frequency, and adjust the driving frequency to track the optimal resonant point in real time. When the parameters of the heating system devices change, the frequency tracking heating module automatically adjusts the driving frequency to compensate for parameter drift. The temperature detection module includes a thermocouple temperature sensor, which is used to detect the internal temperature of the heating chamber and the steam outlet temperature in real time and feed the temperature signal back to the control system. The control system dynamically adjusts the output power of the frequency tracking heating module according to the deviation between the real-time temperature and the target temperature, so that the steam temperature is stabilized within ±2℃ of the set temperature. The bubble detection module is used to detect bubbles and steam quality abnormalities during the water supply process. When abnormal bubbles are detected, the control system immediately stops the steam output and issues an alarm signal to prevent air embolism or abnormal steam quality. The needle position detection module is used to detect the needle exit and retraction status of the steam ablation needle. When the steam ablation needle is detected to be not accurately exited or not properly retracted, the control system prohibits the steam output to ensure the safety of the treatment process.

6. The hot steam therapy system for treating benign prostatic hyperplasia according to claim 5, characterized in that, The control system is equipped with a push-in closed-loop control algorithm, a frequency-tracking heating closed-loop control algorithm, and a multi-parameter cooperative control algorithm, among which: The injection closed-loop control algorithm is configured to calculate the injection flow error based on the position feedback signal output by the position feedback component and the pressure feedback signal output by the pressure detection component, and adjust the operating speed of the closed-loop stepper motor in real time based on the injection flow error. The frequency tracking heating closed-loop control algorithm is configured to calculate the resonant frequency of the heating system in real time based on the resonant detection signal output by the resonant detection circuit, and dynamically adjust the driving frequency of the frequency tracking heating module to determine that the heating system is working in the optimal resonant state. The multi-parameter coordinated control algorithm is configured to coordinate the injection component and the steam generation component based on real-time parameters such as injection flow rate, heating power and steam pressure, in order to maintain the stability and consistency of the steam output process.

7. The hot steam therapy system for treating benign prostatic hyperplasia according to claim 6, characterized in that, The control system establishes a dynamic response model for injection based on the position feedback component and the pressure detection component. It adopts a control strategy that combines feedforward compensation and feedback correction. It predicts the change in injection load according to the target injection curve and dynamically corrects the drive frequency, speed and acceleration of the closed-loop stepper motor by combining real-time position deviation and pressure deviation. The control system employs high-speed sampling and real-time interpolation control to compensate online for mechanical lag, inertial error, and pressure disturbance in the injection pipeline of the screw drive mechanism, thereby achieving dynamic closed-loop regulation of the injection process.

8. The hot steam therapy system for treating benign prostatic hyperplasia according to claim 7, characterized in that, The control system establishes a multi-parameter coupled control model between heating power, resonant frequency, steam temperature, injection flow rate, and steam pressure; During the preheating process, the control system adjusts the output power and driving frequency of the high-frequency power drive circuit in real time based on the temperature change rate, impedance change rate, and resonant frequency offset of the heating cavity. During the steam output process, the control system coordinates the output power, driving frequency, and injection parameters of the frequency-tracking heating module and the injection component based on the temperature feedback signal and pressure detection signal output by the thermocouple temperature sensor, and performs dynamic compensation control on the heating power and injection flow rate based on the steam pressure change.

9. The hot steam therapy system for treating benign prostatic hyperplasia according to claim 1, characterized in that, The treatment handpiece assembly is connected to the main unit via a cable assembly, which includes a power line, a control signal line, a temperature detection signal line, and a ground line. The control signal line and the temperature detection signal line have independent shielding structures and are housed inside a multi-layer shielded cable. Each shielding layer is connected to the system ground to form an electromagnetic shielding loop. The cable assembly is used to transmit power, control signals, and temperature detection signals between the main unit and the treatment handpiece assembly.

10. A steam therapy method for treating benign prostatic hyperplasia, applicable to the steam therapy system for treating benign prostatic hyperplasia as described in any one of claims 1-9, characterized in that, include: Install the treatment handpiece assembly, water delivery system, steam generator assembly, and cystoscope assembly; Performs infusion and perfusion, pipeline venting, temperature calibration, and functional self-test; Based on cystoscopy to observe prostate tissue, the ablation site is determined, and the direction of the steam ablation needle is adjusted. The steam ablation needle is inserted into the target tissue, and the injection component and frequency-tracking heating module are activated to convert the delivered sterile water into hot steam, which is then delivered to the prostatic hyperplasia tissue for ablation treatment. Stop steam output, retrieve the steam ablation needle, rinse and drain the treated area to complete the treatment process; The process of controlling the steam ablation needle to penetrate the target tissue, activating the injection component and the frequency-tracking heating module to convert the delivered sterile water into hot steam, and then delivering the hot steam to the prostatic hyperplasia tissue for ablation treatment includes: A closed-loop control model for injection is established based on the position feedback signal and pressure feedback signal of the injection component. The driving parameters of the injection component are adjusted in real time according to the deviation between the target injection parameters and the actual injection parameters. A frequency-tracking heating closed-loop control model is established based on the resonance detection signal of the steam generator assembly. The driving frequency of the frequency-tracking heating module is dynamically adjusted according to the resonant frequency deviation of the heating system, and the heating power and injection parameters are coordinated and adjusted based on the temperature feedback signal and the pressure feedback signal.

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