An ablation needle and an ablation device

Abstract

This application discloses an ablation needle and ablation device. The ablation needle includes a needle body, a radiation component, and a water circulation pipeline. The needle body has a front end that contacts the tissue to be ablated. The radiation component is assembled inside the needle body and has a radiation window. The radiation component is used to radiate microwave energy outward from the needle body through the radiation window to form an ablation area on the tissue to be ablated. The water circulation pipeline is disposed inside the needle body and extends along the length of the needle body for cooling the needle body and the radiation component. This method enables the formation of a relatively large and circular ablation area on the tissue to be ablated, while effectively preventing the needle body from overheating, achieving full needle water cooling.

Description

Technical Field

[0001] This application relates to the field of ablation needle technology, and in particular to an ablation needle and ablation device. Background Technology

[0002] Microwave therapy is widely used in the medical field. Its principle is that under the action of microwave alternating electric field, charged particles and polar molecules in tumor cells will generate heat through friction during vibration. When the temperature reaches 42℃~100℃, the proteins in the tissue cells will begin to deform until they coagulate and die.

[0003] Currently, monopole antennas with choke functions used in clinical practice are generally filled with high-temperature resistant materials to achieve a more circular ablation zone. However, during use, the high-temperature resistant materials can cause the ablation needle tip to overheat, easily leading to medical safety accidents. Moreover, current ablation needles are clearly unable to meet the requirements for a larger and more circular ablation area. Summary of the Invention

[0004] This application mainly provides an ablation needle and ablation device to solve the problems that current ablation needles cannot meet the requirements of a large and round ablation range and that the temperature of the ablation needle tip is too high.

[0005] To achieve the above objectives, this application proposes an ablation needle comprising a needle body, a radiation assembly, and a water circulation pipeline. The needle body has a front end that contacts the tissue to be ablated. The radiation assembly is assembled within the needle body and has a radiation window. The radiation assembly is used to radiate microwave energy outward from the needle body through the radiation window to form an ablation area on the tissue to be ablated. The water circulation pipeline is disposed within the needle body and extends along the length of the needle body for cooling the needle body and the radiation assembly.

[0006] Optionally, the number of radiation windows is two, the two radiation windows are arranged at intervals along the length direction of the needle body, and have lengths L1 and L2 respectively along the length direction of the needle body, and the distance between the two radiation windows is L3;

[0007] The lengths L1 and L2 satisfy the following relationship: L1 / L2=1 / 2*λ / (1+√ε), and L3 satisfies the following relationship: L3=1 / 2*λ;

[0008] Wherein, λ is the effective wavelength at the corresponding frequency, and ε is the relative permittivity.

[0009] Optionally, the relative permittivity ε is 40-50, and the lengths L1 and L2 are 0.8mm-2mm.

[0010] Optionally, the radiation component includes a conductive cable and a choke coil, both of which are disposed within the needle body. The choke coil is sleeved on the conductive cable. The two radiation windows are formed at one end of the conductive cable near the front end and are located between the choke coil and the front end. The choke coil is used to prevent microwave energy from being transmitted in the direction opposite to the front end.

[0011] Optionally, the conductive cable includes an outer conductor cable, an inner conductor cable, and a conductive dielectric layer arranged coaxially. The outer conductor cable and the conductive dielectric layer surround the inner conductor cable, and the conductive dielectric layer is connected between the outer conductor cable and the inner conductor cable.

[0012] Optionally, the water circulation pipeline includes a guide pipe, which is assembled inside the needle body and extends along the length of the needle body. The conductive cable passes through the guide pipe, and the outer wall of the conductive cable is insulated. The needle body has an elongated chamber inside. One end of the guide pipe and the bottom of the elongated chamber cooperate to form a baffle space, and the outer wall of the guide pipe and the inner wall of the needle body cooperate to form a return channel. The baffle space communicates with the return channel.

[0013] The ablation needle also includes a water tank. One end of the needle body is connected to the water tank. The water tank has an inflow chamber and a return chamber arranged at intervals. The other end of the guide tube passes through the return chamber and is connected to the inflow chamber. The return channel is connected to the return chamber.

[0014] Optionally, the water tank includes a water tank body, a first end plug, and a second end plug, wherein the first end plug and the second end plug are detachably connected to both ends of the water tank body;

[0015] The water tank body is provided with an isolation section, the guide pipe passes through the isolation section, the first end plug and the isolation section form the inflow chamber, and the second end plug and the isolation section form the return chamber.

[0016] Optionally, the ablation needle further includes a handle housing, the needle body includes a needle tube body and a needle tip, one end of the needle tube body is connected to the handle housing, one end of the needle tube body is connected to the needle tip, the front end is formed in the needle tip, the water tank is installed in the handle housing, and the guide tube is installed in the needle tube body.

[0017] Optionally, the needle is a ceramic needle, and the needle tube body is a stainless steel needle tube body.

[0018] Optionally, the ablation needle further includes an RF connector connected to the conductive cable, the RF connector being used to transmit microwave energy to the conductive cable.

[0019] To achieve the above objectives, this application also proposes an ablation device, which includes an ablation host and the ablation needle, wherein the ablation needle is connected to the ablation host via the radio frequency connector;

[0020] The ablation unit is provided with a first connector and a second connector. The water tank is provided with an inlet channel communicating with the inflow chamber and an outlet channel communicating with the return chamber. The first connector is connected to the inlet channel through an inlet pipe, and the second connector is connected to the outlet channel through an outlet pipe.

[0021] The beneficial effects of this application are as follows: Unlike the prior art, this application discloses an ablation needle and ablation device. The tip of the needle body contacts the tissue to be ablated. The radiation component radiates microwave energy outward from the needle body through the radiation window to form an ablation area on the tissue to be ablated. During the process of microwave energy radiating outward from the needle body, the radiation component can contain the microwave energy at the tip to promote the development of the ablation area towards a circular shape, thereby forming a larger and more circular ablation area on the tissue to be ablated, which improves the treatment effect on the tissue to be ablated. At the same time, the water circulation pipeline cools the needle body and the radiation component, effectively preventing the tip of the needle body from getting too hot, which could cause damage to the tip of the needle body or severe carbonization of the ablation area, resulting in the needle tip falling off when the ablation needle is pulled out. It also effectively prevents the area of ​​the needle body away from the tip from getting too hot, which could cause thermal damage and severe tailing phenomenon in the area away from the tip. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram illustrating an embodiment of an ablation needle used in this application;

[0024] Figure 2 This is a schematic diagram illustrating an embodiment of the ablation device used in this application;

[0025] Figure 3 This is a cross-sectional structural diagram used in this application to illustrate an embodiment of an ablation needle;

[0026] Figure 4This is a schematic diagram illustrating a disconnected structure at one point in an embodiment of an ablation needle, as used in this application.

[0027] Figure 5 This is a schematic diagram illustrating another part of the disconnection structure of an embodiment of an ablation needle, as used in this application;

[0028] Figure 6 This is a schematic diagram illustrating another disconnection structure of an embodiment of an ablation needle used in this application;

[0029] Figure 7 For the purpose of this application to demonstrate Figure 6 A magnified view of a portion of point A in the middle.

[0030] Reference numerals: 10. Ablation unit; 101. First connector; 102. Second connector; 103. Inlet pipe; 104. Outlet pipe; 20. Ablation needle; 1. Needle body; 11. Needle tube body; 111. Through hole; 12. Needle tip; 121. Cavity; 13. Long chamber; 2. Radiation assembly; 21. Conductive cable; 211. Outer conductor cable; 212. Inner conductor cable; 213. Conductive dielectric layer; 22. Choke coil; 23. Radiation window; 3. Water circulation pipeline; 31. Guide pipe; 32. Return channel; 4. Water tank; 41. Inlet chamber; 42. Return chamber; 43. Inlet channel; 44. Outlet channel; 45. Water tank body; 46. First end plug; 47. Second end plug; 48. Isolation part; 5. Handle shell; 6. Radio frequency connector; 7. Thermometer.

[0031] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0033] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0035] This application proposes an ablation device, referring to... Figures 1 to 4 , Figure 1 This is a schematic diagram illustrating an embodiment of an ablation needle used in this application. Figure 2 This is a schematic diagram illustrating an embodiment of the ablation device used in this application. Figure 3 This is a cross-sectional structural diagram used in this application to illustrate an embodiment of an ablation needle. Figure 4 This is a schematic diagram illustrating a disconnected structure of one embodiment of the ablation needle used in this application. The ablation device includes an ablation host 10 and an ablation needle 20. The ablation needle 20 includes an radio frequency connector 6. The ablation host 10 is connected to the radio frequency connector 6 of the ablation needle 20 via a microwave transmission cable to establish the connection between the ablation host 10 and the ablation needle 20. The ablation host 10 may be a pulse voltage generator used to generate microwave energy, which is transmitted to the ablation needle 20 via the microwave transmission cable. The ablation needle 20 is used to puncture the tissue to be ablated in the patient. The ablation needle 20 can radiate the microwave energy generated by the ablation host 10 onto the tissue to be ablated, forming an ablation area on the tissue. During the radiation process, the ablation needle 20 can concentrate the microwave energy in the needle tip 12 area, thereby promoting the shape of the ablation area to develop towards a circle, resulting in a larger and more circular ablation area on the tissue to be ablated, thus improving the treatment effect on the tissue to be ablated.

[0036] In addition, the ablation host 10 is provided with a first connector 101 and a second connector 102, and the ablation needle 20 is provided with a water inlet channel 43 and a water outlet channel 44. The first connector 101 is connected to the water inlet channel 43 through a water inlet pipe 103, and the second connector 102 is connected to the water outlet channel 44 through a water outlet pipe 104. During the ablation treatment of the tissue to be ablated by the ablation needle 20, a water circulation pipeline 3 (e.g., ...) can be formed in the body of the ablation needle 20 through the first connector 101 and the water inlet channel 43, and the second connector 102 and the water outlet channel 44. Figure 4 (As shown by the arrow in the image), the ablation needle 20 is cooled through the water circulation pipe 3, which effectively avoids the problem of the ablation needle 20 overheating.

[0037] Based on the same inventive concept, this application proposes an ablation needle 20, referring to... Figures 2 to 4 The ablation needle 20 includes a needle body 1, a radiation component 2, and a water circulation pipeline 3. The needle body 1 has a front end that contacts the tissue to be ablated. It can be understood that the front end of the needle body 1 can be the needle tip 12 of the needle body 1. In use, the needle tip 12 of the needle body 1 is percutaneously inserted into the tissue to be ablated.

[0038] The radiation assembly 2 is assembled inside the needle body 1 and has a radiation window 23. The radiation window 23 is annular groove type, which is beneficial for the distribution of the electric field. The radiation assembly 2 is connected to the radio frequency connector 6. The radiation assembly 2 is used to radiate the microwave energy generated by the ablation host 10 to the outside of the needle body 1 through the radiation window 23 to form an ablation area on the tissue to be ablated. The water circulation pipe 3 is disposed inside the needle body 1 and extends along the length of the needle body 1 for cooling the needle body 1 and the radiation assembly 2.

[0039] During use, the needle tip of the needle body 1 is percutaneously inserted into the tissue to be ablated. The radiation component 2 radiates the microwave energy generated by the ablation host 10 outwards through the radiation window 23, concentrating the microwave energy in the area of ​​the needle tip 12 to form a relatively large and round ablation zone on the tissue to be ablated. The microwave energy forms a microwave electromagnetic field within the ablation zone. Under the influence of the microwave electromagnetic field, the polar molecules in the tissue to be ablated move at high speed and generate heat through mutual friction. When the temperature reaches 42℃~100℃, the proteins of the cancer cells in the tissue to be ablated completely denature and die, thereby achieving the therapeutic purpose.

[0040] Optionally, there are two radiation windows 23. By using two radiation windows 23, the electric field can be superimposed during the radiation of microwave energy. By using one or both radiation windows 23, the ablation area can be larger and more rounded.

[0041] Two radiation windows 23 are spaced apart along the length of the needle body 1, and each has a length L1 and a length L2 along the length of the needle body 1, respectively. The distance between the two radiation windows 23 is L3. Lengths L1 and L2 satisfy the relationship: L1 / L2=1 / 2*λ / (1+√ε), and L3 satisfies the relationship: L3=1 / 2*λ. Where λ is the effective wavelength at the corresponding frequency, and ε is the relative permittivity. The relative permittivity ε is 40-50, and the lengths L1 and L2 are 0.8mm-2mm.

[0042] For example, if the length L1 is 0.8 mm, the wavelength λ of the microwave is 0.2 mm, and the relative permittivity ε is 40, the corresponding lengths L2 and L3 are 1.1 mm and 0.1 mm respectively.

[0043] The length L1 is 1 mm, the wavelength λ of the microwave is 0.2 mm, the relative permittivity ε is 50, and the corresponding lengths L2 and L3 are 1.2 mm and 0.1 mm respectively.

[0044] The length L1 is 1 mm, the microwave wavelength λ is 0.3 mm, the relative permittivity ε is 50, and the corresponding lengths L2 and L3 are 0.8 mm and 0.15 mm, respectively.

[0045] Reference Figures 3 to 7 ,in, Figure 5 This is a schematic diagram illustrating another disconnection structure of an embodiment of the ablation needle used in this application. Figure 6 This is a schematic diagram illustrating another disconnection structure of an embodiment of an ablation needle, as used in this application. Figure 7 For the purpose of this application to demonstrate Figure 6 A partially enlarged schematic diagram at point A. The radiation assembly 2 includes a conductive cable 21 and a choke coil 22, both of which are disposed within the needle body 1. The choke coil 22 is sleeved on the conductive cable 21, and two radiation windows 23 are formed at the end of the conductive cable 21 near the front end. The conductive cable 21 is connected to the RF connector 6 for transmitting microwave energy and radiating the microwave energy to the outside of the needle body 1 through the two radiation windows 23. The two radiation windows 23 are located between the choke coil 22 and the front end. The choke coil 22 is used to prevent the microwave energy from being transmitted towards the end opposite the front end, thereby concentrating the microwave energy in the needle tip 12 area of ​​the needle body 1 and promoting the ablation area to develop into a circle.

[0046] The conductive cable 21 includes an outer conductor cable 211, an inner conductor cable 212 and a conductive dielectric layer 213 arranged coaxially. The outer conductor cable 211 and the conductive dielectric layer 213 surround the inner conductor cable 212, and the conductive dielectric layer 213 is connected between the outer conductor cable 211 and the inner conductor cable 212.

[0047] Reference Figures 4 to 6 The water circulation pipeline 3 includes a guide pipe 31, which is installed inside the needle body 1 and extends along the length of the needle body 1. A conductive cable 21 passes through the guide pipe 31, and the outer wall of the conductive cable 21 is insulated. The needle body 1 has an elongated chamber 13 inside. One end of the guide pipe 31 and the bottom of the elongated chamber 13 cooperate to form a baffle space, and the outer wall of the guide pipe 31 and the inner wall of the needle body 1 cooperate to form a return channel 32. The baffle space and the return channel 32 are connected.

[0048] The ablation needle 20 also includes a water tank 4. One end of the needle body 1 is connected to the water tank 4. The water tank 4 has an inlet chamber 41 and a return chamber 42 arranged at intervals. The other end of the guide tube 31 passes through the return chamber 42 and is connected to the inlet chamber 41. The return channel 32 is connected to the return chamber 42. The water tank 4 has an inlet channel 43 and an outlet channel 44. The first connector 101 is sealed to the inlet channel 43 through the inlet pipe 103, and the second connector 102 is sealed to the outlet channel 44 through the outlet pipe 104.

[0049] The water tank 4 includes a tank body 4, a first end plug 46, and a second end plug 47. The first end plug 46 and the second end plug 47 are detachably connected to both ends of the tank body 4 for easy replacement and cleaning. An isolation section 48 is provided inside the tank body 4, and a guide pipe 31 passes through the isolation section 48. An inlet chamber 41 is formed between the first end plug 46 and the isolation section 48, and a return chamber 42 is formed between the second end plug 47 and the isolation section 48. A water inlet channel 43 connects to the inlet chamber 41, and a water outlet channel 44 connects to the return chamber 42.

[0050] During use, cooling water enters the inlet chamber 41 from the first connector 101 and is transported towards the front end of the needle body 1 through the guide pipe 31. When passing through the deflection space, the cooling water flows back to the return chamber 42 through the return channel 32 and is discharged to the second connector 102 through the outlet channel 44, thus repeating the cycle. The cooling water continuously circulates to remove heat from the needle body 1 and the conductive cable 21, effectively preventing the front end of the needle body 1 from overheating, which could cause damage to the front end of the needle body 1 or severe carbonization of the ablation area, resulting in the needle tip 12 falling off when the ablation needle 20 is pulled out. It also effectively prevents the area of ​​the needle body 1 away from the front end from overheating, which could cause thermal damage and severe tailing in the area away from the front end. This achieves sufficient cooling of the needle body 1 and the conductive cable 21, realizing full needle water cooling.

[0051] Reference Figures 4 to 7 The ablation needle 20 also includes a handle housing 5, and the needle body 1 includes a needle tube body 11 and a needle tip 12. One end of the needle tube body 11 is connected to the handle housing 5, and the other end is connected to the needle tip 12, with the front end formed in the needle tip 12. A guide tube 31 is installed inside the needle tube body 11. A water tank 4 is installed on the handle housing 5, and an RF connector 6 is installed on the handle housing 5 and connected to the first end plug 46. A conductive cable 21 passes through the water tank 4 and is electrically connected to the RF connector 6. The needle tube body 11 is elongated to extend the return channel 32, allowing the cooling water to fully remove heat from the needle body 1, thus improving the cooling efficiency and effect.

[0052] The needle 12 is designed with a triangular prism, which allows it to easily penetrate biological tissue and improves the smoothness of the puncture.

[0053] The needle 12 is threadedly connected to the needle tube body 11, or one end of the needle 12 is inserted into the needle tube body 11. A cavity 121 is formed inside the needle 12, and the needle tube body 11 has a through hole 111. The through hole 111 of the needle tube body 11 and the cavity 121 of the needle 12 cooperate to form an elongated chamber 13. Through the cavity 121 of the needle 12, cooling water can reach the tip of the needle 12, which helps to better cool the needle 12 and improve the treatment effect.

[0054] In some embodiments, the needle 12 can be a ceramic needle 12, and the needle body 11 can be a stainless steel needle body 11. The ceramic needle 12 not only allows microwave energy to radiate to the outside of the needle body 1, but also reduces the temperature, thus having a cooling effect and effectively preventing the temperature in the area of ​​the needle 12 from becoming too high.

[0055] The ablation needle 20 also includes a thermometer 7, which is installed inside the handle housing 5 and connected to the choke coil 22 or the needle tip 12. It is used to monitor the temperature inside the needle body 1 in real time to achieve high-precision temperature measurement and control.

[0056] The temperature sensor 7 can be a temperature sensing PIN or a temperature sensor. In this embodiment, the temperature sensor 7 is a temperature sensing PIN. This is only an example and does not limit the temperature sensor 7.

[0057] The beneficial effects of this application are as follows: Unlike the prior art, this application discloses an ablation needle 20 and an ablation device. The front end of the needle body 1 contacts the tissue to be ablated. The radiation component 2 radiates microwave energy outward from the needle body 1 through the radiation window 23 to form an ablation area on the tissue to be ablated. During the process of microwave energy radiating outward from the needle body 1, the radiation component 2 can contain the microwave energy in the front end area to promote the development of the shape of the ablation area towards a circle, so as to form a larger and more rounded ablation area on the tissue to be ablated, thereby improving the treatment effect on the tissue to be ablated. At the same time, the water circulation pipe 3 is used to cool the needle body 1 and the radiation component 2, effectively avoiding the front end of the needle body 1 from getting too hot, causing damage to the front end of the needle body 1 or severe carbonization of the ablation area, which would cause the needle tip 12 to fall off when the ablation needle 20 is pulled out. It also effectively avoids the area of ​​the needle body 1 away from the front end from getting too hot, which would cause thermal damage to the area of ​​the needle body 1 away from the front end and form a severe tailing phenomenon.

[0058] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. An ablation needle, characterized in that, include: The needle body has a tip that contacts the tissue to be ablated; A radiation assembly, fitted inside the needle body, is provided with a radiation window. The radiation assembly is used to radiate microwave energy outside the needle body through the radiation window to form an ablation area on the tissue to be ablated. A water circulation pipe is installed inside the needle body and extends along the length of the needle body for cooling the needle body and the radiation component; The number of radiation windows is two, and the two radiation windows are spaced apart along the length direction of the needle body, and have lengths L1 and L2 respectively along the length direction of the needle body, and the distance between the two radiation windows is L3; The lengths L1 and L2 satisfy the following relationship: The L3 satisfies the following relation: ; Wherein, λ is the effective wavelength at the corresponding frequency, ɛ is the relative permittivity, the relative permittivity ɛ is 40-50, and the lengths L1 and L2 are 0.8mm-2mm.

2. The ablation needle as described in claim 1, characterized in that, The radiation component includes a conductive cable and a choke coil, both of which are disposed within the needle body. The choke coil is sleeved on the conductive cable. Two radiation windows are formed at one end of the conductive cable near the front end, and the two radiation windows are located between the choke coil and the front end. The choke coil is used to prevent microwave energy from being transmitted to the end opposite to the front end.

3. The ablation needle as described in claim 2, characterized in that, The conductive cable includes an outer conductor cable, an inner conductor cable, and a conductive dielectric layer arranged coaxially. The outer conductor cable and the conductive dielectric layer surround the inner conductor cable, and the conductive dielectric layer is connected between the outer conductor cable and the inner conductor cable.

4. The ablation needle as described in claim 2, characterized in that, The water circulation pipeline includes a guide tube, which is assembled inside the needle body and extends along the length of the needle body. The conductive cable passes through the guide tube and has an insulating outer wall. The needle body has an elongated chamber inside. One end of the guide tube and the bottom of the elongated chamber cooperate to form a baffle space, and the outer wall of the guide tube and the inner wall of the needle body cooperate to form a return channel. The baffle space communicates with the return channel. The ablation needle also includes a water tank. One end of the needle body is connected to the water tank. The water tank has an inflow chamber and a return chamber arranged at intervals. The other end of the guide tube passes through the return chamber and is connected to the inflow chamber. The return channel is connected to the return chamber.

5. The ablation needle as described in claim 4, characterized in that, The water tank includes a water tank body, a first end plug, and a second end plug, wherein the first end plug and the second end plug are detachably connected to both ends of the water tank body. The water tank body is provided with an isolation section, the guide pipe passes through the isolation section, the first end plug and the isolation section form the inflow chamber, and the second end plug and the isolation section form the return chamber.

6. The ablation needle as described in claim 4, characterized in that, The ablation needle also includes a handle shell, the needle body includes a needle tube body and a needle tip, one end of the needle tube body is connected to the handle shell, one end of the needle tube body is connected to the needle tip, the front end is formed in the needle tip, the water tank is installed in the handle shell, and the guide tube is installed in the needle tube body.

7. The ablation needle as described in claim 6, characterized in that, The needle is a ceramic needle, and the needle tube body is a stainless steel needle tube body.

8. The ablation needle as described in claim 6, characterized in that, The ablation needle also includes an RF connector connected to the conductive cable, the RF connector being used to transmit microwave energy to the conductive cable.

9. An ablation device, characterized in that, Includes an ablation host and an ablation needle as described in any one of claims 1 to 8, wherein the ablation needle is connected to the ablation host via a radio frequency connector; The ablation unit is equipped with a first connector and a second connector. The water tank is equipped with an inlet channel communicating with the inflow chamber and an outlet channel communicating with the return chamber. The first connector is connected to the inlet channel through an inlet pipe, and the second connector is connected to the outlet channel through an outlet pipe.

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