A prostate steam ablation system, steam ablation method

Abstract

The application discloses a prostate steam ablation system and a steam ablation method, and relates to the field of medical instruments.The prostate steam ablation system comprises a host computer, a handle, and a preheating device.The host computer is used for providing energy required for generating ablation steam.The handle is used for guiding the ablation steam to a target ablation position.The preheating device is arranged in the host computer and is used for heating sterile water in a target volume to a target temperature, wherein the target temperature is close to a boiling point.The steam generator is arranged on the handle and is used for secondarily heating the sterile water with the target temperature to form ablation steam.Based on the existing prostate steam ablation system, the preheating device is additionally arranged, the preheating device is used for preheating the sterile water to the target temperature, and then the sterile water is transmitted to the handle, and the steam generator on the handle is used for secondarily heating the sterile water to form water vapor, so that the steam generation time is shortened.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to a prostate steam ablation system and steam ablation method. Background Technology

[0002] Benign prostatic hyperplasia (BPH) is a common disease among middle-aged and elderly men, with symptoms typically appearing after age 50. Its incidence is positively correlated with age. Early-stage symptoms can be relieved with medication, while later stages require surgical intervention or minimally invasive ablation devices.

[0003] Among various surgical options for this disease, transurethral vapor ablation of the prostate is one of the most advanced techniques for treating benign prostatic hyperplasia (BPH) internationally. During the procedure, sterile steam at 103°C is injected into the target area of ​​the enlarged prostatic tissue via a guide needle, causing the tissue to gradually lose its activity, eventually leading to apoptosis and necrosis. One to three months post-surgery, the necrotic prostatic tissue will gradually shrink or slough off and be excreted with urine, thus forming a natural passage in the prostatic urethra and relieving urinary tract obstruction.

[0004] CN111601549A discloses a steam ablation handheld device that assists doctors in performing steam ablation procedures via a steam ablation catheter. It includes a steam generating element arranged in a coiled shape. A mandrel located within the main body of the handheld device secures the steam generating element in this coiled arrangement. When the steam generating element is activated, a voltage difference is provided along its length, causing the element to heat a liquid within it, converting the liquid into condensable steam. The condensable steam is then delivered to the target tissue via the catheter.

[0005] However, steam ablation systems for the prostate used in surgery still have many areas for improvement: 1. The steam generation time is long (defined as the time from when the operator instructs the steam generator to start (e.g., pressing the steam generation button) to when steam is output from the steam delivery needle), and the steam quality is unstable. This is because the liquid used to generate the steam must be delivered to the steam generator, and after the steam is generated, it needs to be delivered to a catheter, and then from there to the tissue. During delivery, some of the steam can condense back into a liquid state, resulting in heat loss. In addition, the condensed liquid also hinders the flow rate of the remaining steam, further prolonging the steam generation time. Furthermore, a single surgery involves multiple treatment cycles, and reheating is required after each treatment before the next treatment can begin. This also makes it impossible to measure heat loss and to take effective measures to compensate for it. Summary of the Invention

[0006] The purpose of this invention is to provide a prostate steam ablation system and a steam ablation method applied to the system, so as to solve the above-mentioned problems.

[0007] In a first aspect, the present invention provides a prostate vapor ablation system, comprising: A host unit, which provides the energy required to generate ablation vapor; A handle for directing ablation vapor to the target ablation location; A preheating device, which is installed inside the main unit, is used to heat a target volume of sterile water to a target temperature, which is close to the boiling point; A steam generator, which is mounted on the handle, is used to reheat sterile water at a target temperature to form ablative steam.

[0008] Preferably, the handle includes a transmission shaft, a steam ablation needle is disposed inside the transmission shaft, and the steam generator is disposed inside the transmission shaft near the steam ablation needle.

[0009] Preferably, the preheating device uses electromagnetic induction heating to heat the target volume of sterile water.

[0010] Preferably, the preheating device includes: An injection chamber for containing the target volume of sterile water; Positive and negative electrode plates, with the injection cavity disposed between the positive and negative electrode plates; When high-frequency alternating current is applied to the positive and negative plates, a magnetic field is generated. The injection cavity generates an alternating current on its surface by cutting magnetic field lines in the magnetic field, thereby heating the target volume of sterile water in the injection cavity.

[0011] Preferably, the host further includes a controller, which is disposed within the host and configured to control the preheating device to generate sterilizing steam at a preset temperature to sterilize the water vapor delivery pipeline of the entire prostate steam ablation system.

[0012] Preferably, the host further includes a medical advice module, which is disposed within the host and is used to provide an ablation plan, wherein the target volume of the sterile water is determined based on the ablation plan provided by the medical advice module.

[0013] Preferably, the steam generator heats the sterile water at the target temperature using electromagnetic induction heating.

[0014] Preferably, the target temperature is 90-95°C.

[0015] In a second aspect, the present invention provides a steam ablation method, wherein the steam ablation method is applied to the prostate steam ablation system of the first aspect mentioned above, the steam ablation method comprising: The target volume of sterile water is heated to a target temperature, which is close to the boiling point, using a preheating device. The sterile water at the target temperature is reheated by a steam generator to form ablative steam. The target ablation site is ablated using the ablation vapor.

[0016] Preferably, before heating the sterile water to the target temperature using the preheating device, the method further includes: The preheating device generates sterilization steam at a preset temperature. The disinfecting steam is used to disinfect the water and steam delivery pipeline of the entire prostate steam ablation system.

[0017] The beneficial effects of the prostate steam ablation system and steam ablation method according to the present invention are as follows: A preheating device was added to the existing prostate steam ablation system. The sterile water was preheated to the target temperature by the preheating device and then transferred to the handle. It was then heated again by the steam generator on the handle to form ablation steam. Since the sterile water was already close to the boiling point when it was heated by the steam generator, the steam generation time can be shortened, the steam generation efficiency can be improved, and more stable and continuous steam can be produced.

[0018] Furthermore, since the sterile water delivered to the steam generator has been preheated, the power of the steam generator does not need to be too high. This allows the size of the steam generator to be reduced to a position on the handle transmission rod close to the steam delivery needle. Once the steam is generated, it can immediately enter the steam delivery needle. Due to the extremely short delivery distance, there is almost no heat loss, which ensures the quality of the steam. At the same time, it further shortens the steam generation time.

[0019] In addition, the water and steam delivery pipeline of the entire prostate steam ablation system can be disinfected by a preheating device before the actual surgery to deal with the potential failure of the factory disinfection measures, thereby enhancing the safety of the surgery. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the components of a prostate vapor ablation system according to an embodiment of the present disclosure.

[0021] Figure 2 This is a schematic diagram of a preheating device according to an embodiment of the present disclosure.

[0022] Figure 3 This is a schematic diagram of a steam generator according to an embodiment of the present disclosure.

[0023] Figure 4 This is a flowchart of the prostate vapor ablation system according to an embodiment of the present disclosure.

[0024] Figure 5 This is a flowchart of a steam ablation method according to an embodiment of the present disclosure.

[0025] Figure 6 This is a flowchart of another steam ablation method according to an embodiment of the present disclosure. Implementation

[0026] The present invention will be further explained and described below with reference to the accompanying drawings and embodiments.

[0027] First, combined Figures 1 to 4 A detailed description of the prostate vapor ablation system disclosed herein is provided.

[0028] Reference Figure 1 The prostate steam ablation system disclosed herein includes a main unit and a handle. The main unit provides the energy required to generate ablation steam and performs the functional settings and status monitoring of the entire system. The handle, as an actuator, is used to guide the ablation steam to the target ablation location. To address the technical problem of long steam generation time in current prostate steam ablation systems, this disclosure includes a preheating device in the main unit. This preheating device heats a target volume of sterile water to a target temperature near its boiling point. In one embodiment, the target temperature is 90-95°C, particularly up to 90°C. In other embodiments, the target temperature may be slightly higher or slightly lower than 90-95°C, for example, 89°C or 96°C.

[0029] The steam generator mounted on the handle can reheat sterile water at the target temperature to form dissolved steam. Since the sterile water is already near its boiling point when heated by the steam generator, the steam generation time can be shortened to some extent. At the same time, because the steam generator is mounted on the handle, the steam transport distance is also shortened. This avoids heat loss caused by steam condensing back into a liquid state due to excessive transport distance, thus ensuring steam quality.

[0030] In one embodiment, the handle includes a transmission shaft, within which a steam ablation needle is disposed, and a steam generator may be disposed within the transmission shaft adjacent to the steam ablation needle. In other embodiments, the steam generator may also be disposed at the handheld portion of the handle (i.e., the position where the operator's hand holds the handle during surgery), and this disclosure is not limiting in this regard.

[0031] In one embodiment, the steam generator may use electromagnetic induction heating to heat the aforementioned sterile water at the target temperature.

[0032] Figure 3A handle according to an embodiment of the present disclosure is shown, wherein a steam generator that is heated by electromagnetic induction is disposed within the handle's transmission shaft near the steam delivery needle.

[0033] Reference Figure 3 The steam generator is located inside the transmission shaft 4 of the handle, near the steam delivery needle 1. It includes a heating coil 2 and a tubular receiving cavity 3. The heating coil 2 is tightly wound around the receiving cavity 3, with 10-15 turns and an overall length of 1-2 cm. Specifically, the target volume of sterile water, after preheating, is delivered into the tubular receiving cavity 3. A high-frequency alternating current of 100kHz-300kHz is passed through the positive and negative terminals of the heating coil 2, causing the heating coil 2 to generate an alternating magnetic field. The receiving cavity 3 generates a current on its surface due to cutting the magnetic field lines of the heating coil 2, thereby further heating the preheated sterile water inside the cavity, causing it to undergo a phase change and form hot steam. The steam moves and is output from the steam delivery needle 1, acting on the target ablation site. Because the steam generator is extremely close to the steam delivery needle, the steam can immediately enter the steam delivery needle after generation. Due to the extremely short delivery distance, there is almost no heat loss, ensuring steam quality and further shortening the steam generation time.

[0034] Continue to refer to Figure 1 The main unit also integrates other functional modules, including a main controller, protection module, level conversion module, data storage module, medical advice module, energy matching output module, industrial control all-in-one machine, water pump, and sterile water storage device. The handle also integrates a secondary controller.

[0035] The level conversion module is connected to the mains power supply to convert 220V AC power into DC power required by each module.

[0036] The protection module is connected to each functional module in the host and is used to monitor and protect the host status throughout the entire power-on process. Specifically, the protection module can be part of the main controller or set up independently of the main controller.

[0037] The energy matching output module converts the energy output control signal sent by the main controller into energy output, which is applied to the positive and negative electrodes of the preheating device or the steam generator.

[0038] The data storage module stores all data related to the patient and treatment.

[0039] An industrial control all-in-one computer can display the system's working interface and status, and serve as a medium for human-machine interaction. It can receive various selection commands from the operator and transmit them to the main controller, or receive various commands from the main controller and display them on the working interface.

[0040] The sterile water reservoir stores a certain amount (e.g., 500 ml) of sterile water for use in steam consumption during surgery and for rinsing the endoscope when the lens becomes blurry.

[0041] The water pump receives the output signal from the main controller and draws a certain amount of sterile water from the sterile water storage tank into the injection chamber of the preheating device, or rinses the treatment site, tissues, and endoscope through the flushing pipeline.

[0042] The main controller is directly or indirectly connected to the various functional modules in the host and the handle. It can first complete the self-test function of the system upon power-on, and then receive the operator's instructions to perform operations related to steam ablation surgery.

[0043] In one embodiment, the main controller can receive a pre-operative disinfection command from the operator (e.g., receive the "pre-operative disinfection" option selected by the operator on the operating interface of the industrial control computer), and control the preheating device to generate disinfecting steam, which is then used to disinfect the water-steam delivery pipeline of the entire prostate steam ablation system. That is, the main controller is configured to control the preheating device to generate disinfecting steam at a preset temperature (e.g., 120°C~140°C) to disinfect the water-steam delivery pipeline of the entire prostate steam ablation system.

[0044] In one embodiment, the disinfection function is set to optional. This is because all surgical instruments, including water and steam delivery pipelines, are disinfected before leaving the factory. This disclosure provides an optional preoperative disinfection option to address situations such as incomplete disinfection or accidental contamination during transportation. In other embodiments, the disinfection function may also be set to mandatory, and this disclosure does not impose any restrictions on this.

[0045] In one embodiment, the main controller can receive an operator's instruction not to perform preoperative disinfection (e.g., receive the operator's selection of the "deny preoperative disinfection" option on the operating interface of the industrial control computer), and control the preheating device to heat the target volume of sterile water.

[0046] In a specific embodiment, the preheating device uses electromagnetic induction heating to heat the target volume of sterile water. Specifically, refer to... Figure 2The preheating device may include an injection chamber and positive and negative plates. The injection chamber, located between the positive and negative plates, contains the target volume of sterile water. When a high-frequency alternating current (e.g., 200 kHz) is applied to the positive and negative plates, a magnetic field is generated. The injection chamber generates an alternating current on its surface by cutting magnetic field lines within this magnetic field, thereby heating the target volume of sterile water within the injection chamber. The surface of the injection chamber also has an inlet and an outlet, along with solenoid valves located at the inlet and outlet for opening or closing them. A water pump draws the target volume of sterile water from a sterile water reservoir and pumps it into the injection chamber via the inlet. A push rod and a piston are located within the injection chamber. The push rod is connected to a driver. Under the action of the driver, the push rod pushes the piston to control the pressure within the injection chamber and to expel the sterile water from the injection chamber. In addition, temperature and pressure sensors are installed inside the injection chamber to detect the temperature and pressure within the chamber and send the detection information to the main controller. Based on the information received from the two sensors, the main controller controls the energy output of the energy matching output module and the actuator's movement of the push rod to control the temperature and pressure inside the injection chamber in real time, ensuring that the pressure and temperature remain within the set range. When the operator instructs the output of steam (e.g., the operator presses the steam activation button), the push rod inside the injection chamber, under the control of the actuator, pushes the piston to force sterile water heated to the target temperature into the water outlet pipe of the handle. The water is then reheated by the steam generator located on the handle to form hot steam.

[0047] In use Figure 3 When the preheating device performs the aforementioned preoperative disinfection function, the controller responds to the operator's preoperative disinfection selection, controlling the water pump to draw sufficient sterile water from the sterile water storage tank for one complete disinfection, and pumps it to the injection chamber through the inlet. The water is heated, gradually generating high-temperature (e.g., 120℃~140℃) and high-pressure (e.g., 103.4kPa~206.kPa) steam within the injection chamber. Throughout the process, the controller, push rod, temperature sensor, and pressure sensor work together to stabilize the steam temperature and pressure within the injection chamber within the target range. Once sufficient steam is generated, the controller opens the solenoid valve at the steam outlet, and the push rod slowly moves, outputting high-temperature steam throughout the pipeline for 5~10 minutes, disinfecting the water-steam delivery pipeline. The steam is recovered at the end of the pipeline via a steam condenser. In the specific implementation process, the main controller is configured to know in advance the amount of sterile water required to complete one disinfection. Therefore, after the operator selects preoperative disinfection, the main controller can accurately control the amount of sterile water pumped into the injection chamber by the water pump, avoiding insufficient or excessive amount of steam for disinfection.

[0048] In one embodiment, the target volume of sterile water can be determined based on a medical advice module. Specifically, the medical advice module provides an ablation protocol, and the aforementioned target volume of sterile water can be determined based on the ablation protocol provided by the medical advice module. In specific implementation, the medical advice module can be used in conjunction with a data storage module, which stores a large amount of medical record information, such as patient height and weight, lesion location, lesion severity, surgical treatment plan, treatment process, treatment effect, and surgical damage. During surgery, the medical advice module can receive the personal information of the patient about to undergo surgery input by the operator, search and analyze patients with similar conditions from the data storage module, and recommend corresponding ablation protocols to the operator. During surgery, the operator performs ablation according to the ablation protocol provided by the medical advice module. The ablation protocol provided by the medical advice module may include, for example, the ablation sites for this surgery, the number of ablations for each ablation site, and the duration of each ablation. After the medical advice module provides an ablation plan, the main controller calculates the amount of steam required for each ablation based on the plan, and calculates the amount of sterile water required for each ablation accordingly. Based on the calculation results, the controller controls the water pump to accurately pump the amount of sterile water required for the current ablation (i.e., the target volume) into the injection chamber to ensure the ablation effect.

[0049] In addition, the data storage module also stores the operator's operating habits. For example, when ablating prostate tissue at point A, the needle is generally not placed precisely at point A, but rather at a location around point A. The choice of this location varies depending on the operator, and the resulting surgical outcome may also differ. The data storage module can store data on the surgical locations chosen by different operators for point A. When providing treatment plans, the medical advice module retrieves and provides the operating habit data from the data storage module, which further ensures the ablation effect. It is worth mentioning that the operating habit data provided to the current operator includes two parts: the current operator's operating habit data and the operating habit data of other operators. In this way, the current operator can also refer to the operating habits of other operators, potentially ensuring the ablation effect.

[0050] Continue to refer to Figure 1The secondary controller records information from the handpiece and communicates with the primary controller throughout the procedure. Specifically, the handpiece is equipped with temperature and pressure sensors. During the procedure, the temperature sensor continuously monitors the temperature of the steam at the tip of the steam delivery needle and the steam temperature in the steam generator, while the pressure sensor continuously monitors the pressure in the steam generator. Both sensors transmit this data to the secondary controller in real time. The primary and secondary controllers communicate continuously. If the temperature or pressure exceeds a safe value or preset range, the primary controller will stop the energy output and display an alarm message on the industrial control computer screen, prompting the operator to stop treatment and conduct an examination.

[0051] In this way, by communicating data between the host and the handpiece, the steam temperature at the steam delivery needle and the temperature and pressure of the steam generator in the handpiece can be monitored in real time, and corresponding control strategies can be taken in a timely manner to ensure the safety of the operation.

[0052] An endoscope is also attached to the handle. Figure 1 (Not shown in the image) During the procedure, if the endoscope becomes blurry due to steam obstruction or if the surgical site is slightly obstructed, the main controller can control the water pump to draw sterile water from the sterile water storage tank to clean the endoscope.

[0053] The above-mentioned prostate steam ablation system features a highly modular design, facilitating maintenance and replacement. The human-machine interface helps operators clearly understand the equipment's operating status.

[0054] In addition, the above-mentioned prostate steam ablation system is highly automated and intelligent. It can provide operators with relatively effective ablation plans based on the clinical big data recorded in the data storage module, and can automatically control the generation of steam based on the provided ablation plan, making the treatment process more efficient and safer.

[0055] To clearly demonstrate the prostate vapor ablation system disclosed herein, the following is combined with... Figure 4 The working process of the prostate vapor ablation system disclosed herein is described in detail.

[0056] Reference Figure 4 The workflow of the prostate steam ablation system disclosed herein during a single surgery is as follows: S1. Connect the main unit to the mains network using the power cord, press the front panel switch, and the system power will convert the mains power into multiple DC levels. S2. To match different types of treatment needles (e.g., needles for prostate treatment and needles for COPD treatment are different, but both can use the same main unit), the system will initialize after power-on. The initialization process includes communication between the main and secondary controllers, such as handle identification. After the entire initialization process is complete, if no errors occur, the display will enter the user interface for the user's subsequent operations. If the operator selects pre-operative disinfection, the preheating device will start, heating sterile water to form sterile steam. Simultaneously, the operator can input relevant patient information, and the system will provide corresponding treatment plans for the user to choose from. After disinfection, the preheating device preheats the sterile water. During this process, if an error occurs, the system will redirect to an error help interface. The user can resolve the problem themselves or contact the supplier based on the prompts on the display. After troubleshooting, powering on again will repeat the power-on initialization operation. S3. The operator slowly moves the handle to the lesion and observes it through the endoscope. S4. When the operator triggers the output, the secondary controller sends information to the main controller. The main controller controls the energy matching output module to generate electrical energy based on the received information and the output parameters set by the operator through the display screen. The energy matching output module transmits the electrical energy to the steam generator to vaporize the sterile water, and finally, under the control of the operator, it is delivered to the diseased tissue to complete the final output. S5. Throughout the process, the main controller monitors the temperature and pressure of the water vapor through the protection module to ensure the stability of the temperature and pressure. S6. When a fault or error occurs, the main controller will display the information on the screen, indicating that the system has an error. The screen will also display error information and handling suggestions according to the error type, which will facilitate the operator to perform preliminary error diagnosis and troubleshooting.

[0057] Figure 5 A steam ablation method is shown, which is applied to the aforementioned prostate steam ablation system.

[0058] Reference Figure 5 In step 501, the target volume of sterile water is heated to a target temperature, which is close to the boiling point, by a preheating device. In step 502, sterile water at the target temperature is reheated by a steam generator to form ablation steam; In step 503, the target ablation site is ablated using ablation vapor.

[0059] according to Figure 5The steam dissolution method shown can shorten the steam generation time, improve the efficiency of steam generation, and produce more stable and continuous steam because the sterile water already has a temperature close to the boiling point when heated by the steam generator.

[0060] Figure 6 Another vapor ablation method is shown, which includes Figure 5 The steam ablation method shown includes all the steps, and before step 501, it also includes steps 601 and 602.

[0061] Reference Figure 6 In step 601, sterilization steam at a preset temperature is generated by a preheating device; In step 602, the water vapor delivery pipeline of the entire prostate steam ablation system is disinfected using sterilizing steam.

[0062] Due to the remaining steps and Figure 5 The steam dissolution method shown is exactly the same, and for the sake of brevity in the instruction manual, it will not be repeated here.

[0063] Steps 601 and 602 are further configured to be optional. Specifically, if the operator chooses to disinfect the entire steam delivery pipeline of the prostate vapor ablation system, steps 601 and 602 are executed; otherwise, the process proceeds directly. Figure 5 The steam ablation method is shown.

[0064] according to Figure 6 The steam ablation method shown can address situations where the prostate steam ablation system is not thoroughly sterilized before leaving the factory or is accidentally contaminated during transportation, ensuring the safety of the entire surgical procedure.

[0065] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0066] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0067] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention described herein.

Claims

1. A prostate vapor ablation system, characterized in that, include: A host unit, which provides the energy required to generate ablation vapor; A handle for introducing ablation vapor into a target ablation location; the handle includes a transmission shaft, and a vapor ablation needle is disposed inside the transmission shaft. A preheating device, which is installed inside the main unit, is used to heat a target volume of sterile water to a target temperature, which is close to the boiling point; A steam generator, which is mounted on the handle, is used to reheat sterile water at a target temperature to form ablation steam; the steam generator is located inside the transmission shaft near the steam ablation needle; The preheating device includes: An injection chamber for containing the target volume of sterile water; Positive and negative electrode plates, with the injection cavity disposed between the positive and negative electrode plates; When high-frequency alternating current is applied to the positive and negative plates, a magnetic field is generated. The injection cavity generates an alternating current on its surface by cutting magnetic field lines in the magnetic field, thereby heating the target volume of sterile water in the injection cavity.

2. The prostate vapor ablation system according to claim 1, characterized in that, The preheating device uses electromagnetic induction heating to heat the target volume of sterile water.

3. The prostate steam ablation system according to claim 1, characterized in that, Also includes: A controller, located within the host unit, is configured to control the preheating device to generate sterilizing steam at a preset temperature to sterilize the water vapor delivery pipeline of the entire prostate steam ablation system.

4. The prostate steam ablation system according to claim 1, characterized in that, Also includes: A medical advice module, located within the host unit, is used to provide ablation plans, and the target volume of sterile water is determined based on the ablation plan provided by the medical advice module.

5. The prostate vapor ablation system according to claim 1, characterized in that, The steam generator heats the sterile water to the target temperature using electromagnetic induction heating.

6. The prostate vapor ablation system according to claim 1, characterized in that, The target temperature is 90-95°C.

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