Microwave ablation device with water jet protection

Abstract

The application provides a microwave ablation device with water jet protection and belongs to the technical field of microwave ablation devices. The microwave ablation device comprises an integrated box and a needle rod, the needle rod is fixedly connected with the integrated box, one end of the needle rod is inserted into the inside of the integrated box and is fixedly connected with an adapter, the other end of the needle rod extends to the outside of the integrated box and is provided with a needle head, a water permeation area is further arranged between the needle head and the needle rod, and a transmitting antenna and a cooling circulation pipe are sleeved in the needle head. The microwave ablation device has a double cooling mechanism by arranging the water permeation area, water permeation holes and the cooling circulation pipe. In addition to physiological saline circulated by the cooling circulation pipe, part of the physiological saline flows out through the water permeation holes on the water permeation area and fills around the needle head where the transmitting antenna is located. The physiological saline circulated by the cooling circulation pipe and the physiological saline can be used for cooling to significantly reduce the temperature of the transmitting antenna, the needle head and the whole needle rod, greatly reduce the risk of thermal injury, prevent tissue carbonization in the ablation process and avoid needle breakage caused by excessively high temperature of the needle head.

Description

Technical Field

[0001] This invention relates to the field of microwave ablation device technology, and in particular to a microwave ablation device with water spray protection. Background Technology

[0002] Microwave ablation therapy is a minimally invasive treatment widely used in clinical oncology. Its principle is to radiate microwave energy to the target tissue through the transmitting antenna of the microwave ablation needle, causing polar molecules such as water molecules in the tissue to vibrate and rub at high speed to generate heat, thereby achieving thermal coagulation and necrosis of the diseased tissue.

[0003] However, this technology still faces two major technical challenges in clinical application. First, during microwave ablation, the temperature of the tissue around the transmitting antenna rises sharply. This high-temperature environment not only easily leads to thermal damage to the ablation needle itself, resulting in needle breakage due to excessive temperature, but may also cause excessive thermal damage to surrounding normal tissue, leading to tissue carbonization and increasing the risk of surgical complications. In particular, tissue characteristics will change under high temperature conditions, further affecting the treatment effect. Second, due to the differences in human tissue characteristics, the propagation and distribution of microwave energy in the tissue are often uneven, which can easily lead to problems such as irregular shape of the ablation area and incomplete ablation range, directly affecting the accuracy and effectiveness of the treatment. Therefore, this application provides a microwave ablation device with water spray protection to meet the needs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a microwave ablation device with water spray protection to solve the problems of existing microwave ablation devices that easily cause thermal damage and carbonization of normal tissue and uneven propagation and distribution of microwave energy in tissue, which affect the accuracy and effectiveness of treatment.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A microwave ablation device with water spray protection includes an integrated box and a needle rod. The needle rod is fixedly connected to the integrated box. One end of the needle rod is inserted into the interior of the integrated box and fixedly connected to an adapter. The other end of the needle rod extends to the exterior of the integrated box and is equipped with a needle tip. A water seepage zone is provided between the needle tip and the needle rod. A transmitting antenna and a cooling circulation pipe are sleeved in the needle tip. The two ends of the cooling circulation pipe are respectively provided with a circulation input end and a circulation output end, both of which extend into the interior of the water seepage zone. An outlet is provided between the adapter and the cooling circulation pipe. The system includes a water inlet branch, with an inlet branch between the adapter and the seepage area. The seepage area has evenly distributed seepage holes on its exterior, and a sealing component is installed within it. The inlet branch is used to input physiological saline into the seepage area and the cooling circulation pipe, and it is connected to the adapter and the seepage area. The outlet branch is used to recycle the physiological saline after cooling, and it is connected to the adapter and the cooling circulation pipe. The sealing component is used to seal the seepage holes after the physiological saline has filled the tissue, and it is installed within the seepage area.

[0007] Optionally, the transmitting antenna is fixedly connected to the middle position inside the needle, and the cooling circulation pipe is spirally wrapped around the outside of the transmitting antenna. Two connecting pipes are provided on the outside of the adapter, and the ends of the two connecting pipes extend to the outside of the integrated box and are respectively connected to a cooling input pipe and a cooling output pipe.

[0008] Optionally, the water inlet branch includes one of the connecting pipes that is connected to the seepage area via an input branch pipe. This connecting pipe is connected to the cooling input pipe, which is equipped with a flow control valve. The end of the input branch pipe away from the adapter is inserted into the interior of the seepage area.

[0009] Optionally, the water outlet branch includes another connecting pipe that connects to the circulation output end via the output branch pipe. This connecting pipe is connected to the cooling output pipe, which is equipped with a pressure regulating device. The end of the output branch pipe away from the adapter is connected to the circulation output end.

[0010] Optionally, the output branch pipe and the input branch pipe are symmetrically positioned in the seepage zone, and the circulation output end and the output branch pipe both pass through the interior of the seepage zone.

[0011] Optionally, the two ends of the seepage hole opened on the seepage area are a large end and a small end, respectively. The large end is opened on the inner wall of the seepage area, and the small end is opened on the outside of the seepage area. The diameter of the large end is larger than the diameter of the small end, and the small end is opened towards the end of the transmitting antenna.

[0012] Optionally, the sealing component includes a sealing seat fitted inside the seepage area. The sealing seat is annular, and the outer side of the sealing seat is in close contact with the inner wall of the seepage area.

[0013] Optionally, a spring is fixedly connected between the outside of the sealing seat and the inner wall of the seepage area, and a positioning tube is fixedly connected to the outside of the sealing seat, surrounding the outside of the spring. When the positioning tube contacts the inner wall of the seepage area, the position of the sealing seat corresponds to the position of the seepage hole.

[0014] Optionally, the sealing seat has a limiting hole that matches the shape of the output branch pipe. The sealing seat is fitted onto the outside of the output branch pipe through the limiting hole. The opening position of the limiting hole is symmetrical to the connection position of the spring and the positioning tube on the outside of the sealing seat.

[0015] Optionally, the inner side of the sealing seat is symmetrically equipped with baffles distributed on both sides of the input branch pipe. The two baffles and the sealing seat form an impact zone corresponding to the position of the input branch pipe. The outer side of the sealing seat is also provided with symmetrically distributed through openings.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above scheme, a dual cooling mechanism is constructed by setting up a seepage zone, seepage holes, and a cooling circulation pipe. In addition to the physiological saline circulating in the cooling circulation pipe, some physiological saline flows out through the seepage holes on the seepage zone and fills the area around the needle where the transmitting antenna is located. This, together with the physiological saline circulating in the cooling circulation pipe for cooling, can significantly reduce the temperature of the transmitting antenna, the needle, and the entire needle shaft, greatly reducing the risk of thermal damage, preventing tissue carbonization during ablation, and avoiding needle breakage due to excessively high needle temperature.

[0018] By setting up seepage zones and seepage holes, physiological saline can fill the area around the needle where the transmitting antenna is located through the seepage zones and seepage holes. In addition to assisting in cooling and temperature reduction, it also changes the medium environment for microwave propagation in the tissue, making the microwave energy more evenly distributed in the tissue, forming a more regular and complete ablation area, and improving the effect of ablation treatment.

[0019] By setting up a sealing component and a flow control valve, a clever switching of working modes is achieved. The flow rate of physiological saline can be controlled by adjusting the flow control valve, thereby controlling the impact force on the sealing seat. During the stage of physiological saline filling into the tissue, the sealing seat does not block the seepage hole. However, during the ablation stage when the transmitting antenna is working, the flow rate of physiological saline is accelerated, causing the sealing seat to be subjected to a greater impact force and displacement, thus sealing the seepage hole. This prevents subsequent physiological saline from filling into the tissue and instead uses it all for cooling during microwave ablation, ensuring the cooling effect.

[0020] By setting the large and small ends of the water holes at both ends of the seepage hole, the entire seepage hole is tilted towards the end of the transmitting antenna. This controls the filling position of the saline solution seeping out of the seepage hole in the tissue, guides the saline solution to gather towards the end of the transmitting antenna, enhances the cooling effect of key areas, reduces the resistance encountered by the needle and needle shaft when inserting into the tissue, improves the smoothness of operation, and makes the process of filling the tissue with saline solution smoother. Attached Figure Description

[0021] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0022] Figure 1 A three-dimensional structural diagram of a microwave ablation device with water spray protection;

[0023] Figure 2 This is a partial cross-sectional view of the integrated box.

[0024] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0025] Figure 4 for Figure 2 Enlarged structural diagram at point B;

[0026] Figure 5 This is a schematic diagram of the cross-sectional structure of the needle.

[0027] Figure 6 A schematic diagram of the structure connecting the water seepage zone, the transmitting antenna, and the cooling circulation pipes;

[0028] Figure 7 This is a schematic diagram of a partial cross-sectional view of the seepage zone;

[0029] Figure 8 for Figure 7 Enlarged structural diagram at point C;

[0030] Figure 9 This is a schematic diagram of the three-dimensional structure of the closed seat;

[0031] Figure 10 This is a schematic diagram of the structure for the connection between the closed seat and the input branch pipe;

[0032] Figure 11 This is a schematic diagram of the cross-sectional structure of the seepage zone;

[0033] Figure 12 for Figure 11 Enlarged structural diagram at point D.

[0034] Figure label:

[0035] 1. Integrated box; 2. Needle bar; 3. Cooling input pipe; 4. Cooling output pipe; 5. Flow control valve; 6. Pressure regulating device; 7. Needle tip; 8. Water seepage area; 9. Water seepage hole; 10. Transmitting antenna; 11. Cooling circulation pipe; 12. Circulation input end; 13. Circulation output end; 14. Input branch pipe; 15. Output branch pipe; 16. Sealing seat; 17. Spring; 18. Positioning tube; 19. Limiting hole; 20. Through opening; 21. Partition plate; 22. Large end of water hole; 23. Small end of water hole; 24. Adapter; 25. Connecting pipe.

[0036] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0037] The microwave ablation device with water spray protection provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0038] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0039] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0040] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0041] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0042] like Figures 1 to 4 As shown, an embodiment of the present invention provides a microwave ablation device with water spray protection, including an integrated box 1 and a needle rod 2. The needle rod 2 is fixedly connected to the integrated box 1. One end of the needle rod 2 is inserted into the interior of the integrated box 1 and fixedly connected to an adapter 24. The other end of the needle rod 2 extends to the exterior of the integrated box 1 and is provided with a needle tip 7. A water seepage area 8 is also provided between the needle tip 7 and the needle rod 2. A transmitting antenna 10 and a cooling circulation pipe 11 are sleeved in the needle tip 7. The transmitting antenna 10 is fixedly connected to the middle position inside the needle tip 7, and the cooling circulation pipe 11 is spirally wrapped around the exterior of the transmitting antenna 10. The cooling circulation tube 11 is provided with a circulation input end 12 and a circulation output end 13 at both ends. Both the circulation input end 12 and the circulation output end 13 extend into the interior of the seepage zone 8. When the physiological saline used for cooling enters the seepage zone 8, it can be injected into the interior of the cooling circulation tube 11 through the circulation input end 12 and transported along the spiral structure of the cooling circulation tube 11, thereby reducing the external temperature of the cooling circulation tube 11. When the transmitting antenna 10 is working and transmitting microwaves, it reduces the ambient temperature inside the needle 7, thereby effectively preventing the transmitting antenna 10 and the needle 7 from overheating and causing damage to the tissue.

[0043] In this embodiment, as Figures 2 to 7As shown, evenly distributed seepage holes 9 are opened on the outside of the seepage zone 8. Two connecting pipes 25 are provided on the outside of the adapter 24. The ends of the two connecting pipes 25 extend to the outside of the integrated box 1 and are respectively connected to the cooling input pipe 3 and the cooling output pipe 4. A flow control valve 5 is provided on the cooling input pipe 3, and a pressure regulating device 6 is provided on the cooling output pipe 4. The two connecting pipes 25 on the outside of the adapter 24 are connected to the seepage zone 8 and the circulation output end 13 through the input branch pipe 14 and the output branch pipe 15, respectively. The end of the input branch pipe 14 away from the adapter 24 is... Inserted into the interior of the seepage zone 8, the end of the output branch pipe 15 furthest from the adapter 24 is connected to the circulation output end 13. The cooling input pipe 3, the connecting pipe 25 connected to the input branch pipe 14, the input branch pipe 14, the seepage zone 8, and the circulation input end 12 together form the water inlet branch. In actual use, the flow rate of the water inlet branch is adjusted by the flow control valve 5, so that the saline solution can enter the seepage zone 8 and the cooling circulation pipe 11 along the channel formed by the water inlet branch. Some of the saline solution entering the seepage zone 8 flows out through the seepage holes 9 on the seepage zone 8. The saline solution surrounding the needle 7, where the transmitting antenna 10 is located, works in conjunction with the circulating saline solution in the cooling circulation tube 11 to significantly reduce the temperature of the transmitting antenna 10, the needle 7, and the entire needle shaft 2. This greatly reduces the risk of thermal damage, prevents tissue carbonization during ablation, and avoids needle breakage due to excessively high needle temperature. Furthermore, the saline solution surrounding the needle 7 alters the microwave propagation medium, resulting in a more uniform distribution of microwave energy within the tissue, leading to a more regular and complete ablation process. The ablation area is designed to improve the ablation effect. The needle rod 2, needle tip 7, and seepage area 8 are made of corrosion-resistant and biocompatible metal materials, such as titanium alloy, to ensure that no corrosion or deformation occurs during long-term contact with physiological saline, thus ensuring the structural stability and safety of the ablation needle. The cooling input pipe 3, cooling output pipe 4, connecting pipe 25, input branch pipe 14, output branch pipe 15, and cooling circulation pipe 11 are made of medical-grade polymer materials, such as polytetrafluoroethylene, which have good chemical stability and corrosion resistance, while ensuring smooth delivery of physiological saline.

[0044] In this embodiment, as Figure 2 as well as Figures 5 to 10As shown, the additional saline solution entering the seepage zone 8 enters the cooling circulation pipe 11 through the channel formed by the inlet branch, cooling the inside of the needle 7. The cooling output pipe 4, the connecting pipe 25 connected to the output branch 15, the output branch 15, and the circulation output end 13 together form the outlet branch. The saline solution that has completed its cooling work in the cooling circulation pipe 11 can be recovered from the needle bar 2 and the needle 7 through the channel formed by the outlet branch and recycled for cooling. The pressure regulating device 6 installed on the cooling output pipe 4 can regulate the negative pressure in the outlet branch, thereby ensuring that the saline solution after cooling the needle 7 and the transmitting antenna 10 can flow back smoothly, maintaining the circulation of saline solution in the two branches. The input end of the inlet branch is connected to the cooling input pipe 3 and the flow control valve 5. The external saline storage device has its output end connected to the seepage zone 8 via the input branch pipe 14, ensuring that the saline can fill the tissue where the needle 7 is located through the seepage holes 9 on the seepage zone 8 when it passes through the inlet branch. The input end of the outlet branch is connected to the circulation input end 12 via the output branch pipe 15, and the output end is connected to the heat exchange device via the cooling output pipe 4 and the pressure regulating device 6. The cooled saline is then collected and returned to the external heat exchange device after cooling, so that the saline is recycled back to the saline storage device after heat exchange, thus realizing the recycling of saline in the entire device. The principle and effect of the flow control valve 5, the pressure regulating device 6, the saline storage device and the heat exchange device are the same as those of the prior art, and will not be described in detail here.

[0045] In this embodiment, as Figures 11 to 12 As shown, the two ends of the seepage hole 9 on the seepage zone 8 are a large end 22 and a small end 23, respectively. The large end 22 is located on the inner wall of the seepage zone 8, and the small end 23 is located on the outside of the seepage zone 8. The diameter of the large end 22 is larger than the diameter of the small end 23, and the small end 23 is located towards the end of the transmitting antenna 10. This design makes the seepage hole 9 tilted towards the end of the transmitting antenna 10, thereby controlling the filling position of the physiological saline seeping from the seepage hole 9 in the tissue and ensuring that the physiological saline can be uniformly distributed. The filling is placed outside the needle 7 where the transmitting antenna 10 is located, thereby ensuring the enhanced cooling effect and the effect of changing the medium environment for microwave propagation. The small diameter design of the small end 23 of the water hole makes the exposed space outside the seepage area 8 smaller, reducing the resistance encountered by the needle 7 and needle bar 2 when piercing the tissue, and minimizing the impact of the opening of the seepage hole 9 on the piercing of the needle bar 2 and needle 7 into the tissue. The large diameter design of the large end 22 of the water hole can increase the outlet area of ​​physiological saline from the inside of the seepage area 8 to the outside, making the process of physiological saline filling into the tissue smoother.

[0046] In this embodiment, as Figures 7 to 10As shown, the interior of the seepage zone 8 is hollow, and a sealing assembly is fitted inside the seepage zone 8. The sealing assembly consists of a sealing seat 16, which is annularly fitted inside the seepage zone 8. The outer side of the sealing seat 16 is in close contact with the inner wall of the seepage zone 8. A spring 17 is fixedly connected between the outer side of the sealing seat 16 and the inner wall of the seepage zone 8. A positioning tube 18 is fixedly connected to the outer side of the sealing seat 16, surrounding the outer side of the spring 17. The output branch pipe 15 and the input branch pipe 14 are symmetrically positioned in the seepage zone 8, and the output branch pipe 15 is connected to the circulation output end 13. The circulation output end 13 and the output branch pipe 15 together flow from... The interior of the seepage zone 8 is penetrated. A limiting hole 19 adapted to the shape of the output branch pipe 15 is opened on the sealing seat 16. The sealing seat 16 is sleeved on the outside of the output branch pipe 15 through the limiting hole 19. The opening position of the limiting hole 19 is symmetrical to the connection position of the spring 17 and the positioning tube 18 on the outside of the sealing seat 16. The sleeve relationship between the output branch pipe 15 and the sealing seat 16 forms a limitation on the movement of the sealing seat 16 inside the seepage zone 8. When the sealing seat 16 is impacted by physiological saline and relative displacement occurs between it and the seepage zone 8, it provides limitation and guidance for the displacement of the sealing seat 16, ensuring the stability of the displacement movement of the sealing seat 16 in the seepage zone 8.

[0047] In this embodiment, as Figures 2 to 9 As shown, symmetrical baffles 21 are installed on the inner side of the sealing seat 16, distributed on both sides of the input branch pipe 14. The two baffles 21 and the sealing seat 16 form an impact zone corresponding to the position of the input branch pipe 14. Symmetrically distributed through openings 20 are also provided on the outside of the sealing seat 16. The saline solution entering the seepage zone 8 through the water inlet branch can impact the impact zone formed by the sealing seat 16 and the baffles 21. The flow rate of the saline solution can be controlled by adjusting the flow control valve 5, thereby controlling the impact force on the sealing seat 16. During the stage of filling the tissue with saline solution, a smaller flow rate is controlled by the flow control valve 5. At this time, the impact force on the sealing seat 16 is also smaller. Its position is restricted by the elastic force of the spring 17, so it will not block the seepage hole 9. The saline solution output through the input branch pipe 14 can then... The saline solution can pass through the through opening 20 on the sealing seat 16 into the seepage zone 8, and then fill the tissue through the seepage hole 9 on the seepage zone 8. During the ablation stage when the transmitting antenna 10 is working, the flow rate of the saline solution is accelerated by the flow control valve 5. At this time, the sealing seat 16 is subjected to a large impact force and moves inside the seepage zone 8, which compresses the spring 17 until the positioning tube 18 contacts the seepage zone 8 to limit the sealing seat 16. At this time, the sealing seat 16 forms a seal on the seepage hole 9, and the saline solution can no longer fill the tissue through the seepage hole 9. Instead, it is injected into the cooling circulation pipe 11 through the circulation input end 12, transported in the cooling circulation pipe 11, and circulated through the water outlet branch to ensure the cooling work. The flow rate control is cleverly used to switch the working state of the ablation device.

[0048] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0049] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A microwave ablation device with water spray protection, comprising an integrated box and a needle bar, wherein the needle bar and the integrated box are fixedly connected, characterized in that, One end of the needle bar is inserted into the interior of the integrated box and fixedly connected to an adapter. The other end of the needle bar extends to the exterior of the integrated box and is equipped with a needle tip. A water seepage area is provided between the needle tip and the needle bar. A transmitting antenna and a cooling circulation pipe are fitted inside the needle tip. A circulation input end and a circulation output end are respectively provided at both ends of the cooling circulation pipe. Both the circulation input end and the circulation output end extend into the interior of the water seepage area. A water outlet branch is provided between the adapter and the cooling circulation pipe, and a water inlet branch is provided between the adapter and the water seepage area. Evenly distributed water seepage holes are opened on the exterior of the water seepage area, and a sealing component is fitted inside the water seepage area. The inlet branch is used to input physiological saline into the seepage area and cooling circulation pipe. The inlet branch is connected to the adapter and the seepage area. The water inlet branch includes an inlet branch pipe, with the end of the inlet branch pipe furthest from the adapter inserted into the interior of the seepage zone; The outlet branch is used for the recovery and circulation of saline solution after the cooling process is completed. The outlet branch is connected to the adapter and the cooling circulation pipe. The outlet branch includes an output branch pipe, and the end of the output branch pipe furthest from the adapter is connected to the circulation output end; A sealing component is used to seal the drainage holes after physiological saline is filled into the tissue. The sealing component is fitted into the drainage area. The sealing component includes a sealing seat fitted inside the seepage area. The sealing seat is annular, and the outside of the sealing seat is in close contact with the inner wall of the seepage area. A spring is fixedly connected between the outside of the sealing seat and the inner wall of the seepage area. A positioning tube is fixedly connected to the outside of the sealing seat and surrounds the outside of the spring. When the positioning tube contacts the inner wall of the seepage area, the position of the sealing seat corresponds to the position of the seepage hole. The sealing seat has a limiting hole that matches the shape of the output branch pipe. The sealing seat is fitted onto the outside of the output branch pipe through the limiting hole. The opening position of the limiting hole is symmetrical to the connection position of the spring and the positioning tube on the outside of the sealing seat. The inner side of the sealing seat is symmetrically equipped with baffles distributed on both sides of the input branch pipe. The two baffles and the sealing seat form an impact zone corresponding to the position of the input branch pipe. Symmetrically distributed through openings are also provided on the outside of the sealing seat.

2. The microwave ablation device with water spray protection according to claim 1, characterized in that, The transmitting antenna is fixedly connected to the middle position inside the needle. The cooling circulation pipe is spirally wrapped around the outside of the transmitting antenna. Two connecting pipes are provided on the outside of the adapter. The ends of the two connecting pipes extend to the outside of the integrated box and are respectively connected to the cooling input pipe and the cooling output pipe.

3. The microwave ablation device with water spray protection according to claim 2, characterized in that, The water inlet branch also includes a connecting pipe that connects to the seepage area via an input branch pipe. This connecting pipe is connected to the cooling input pipe, which is equipped with a flow control valve.

4. The microwave ablation device with water spray protection according to claim 3, characterized in that, The water outlet branch also includes another connecting pipe that connects to the circulation outlet end via the outlet branch pipe. This connecting pipe is connected to the cooling outlet pipe, which is equipped with a pressure regulating device.

5. The microwave ablation device with water spray protection according to claim 4, characterized in that, The output branch pipe and the input branch pipe are symmetrically positioned in the seepage zone, and the circulation output end and the output branch pipe both pass through the interior of the seepage zone.

6. The microwave ablation device with water spray protection according to claim 1, characterized in that, The two ends of the seepage hole in the seepage area are a large end and a small end, respectively. The large end is located on the inner wall of the seepage area, and the small end is located on the outside of the seepage area. The diameter of the large end is larger than that of the small end, and the small end is located towards the end of the transmitting antenna.

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