An internal circulation water-cooled electrode kit with adjustable temperature sensor position

Abstract

This application relates to the technical field of medical water-cooled electrodes, and specifically discloses an internal circulation water-cooled electrode kit with an adjustable temperature sensor position. The internal circulation water-cooled electrode kit includes a water-cooling device and a radiofrequency electrode. The water-cooling device includes a water-cooling conduit, a handle, a water inlet pipe, and a water outlet pipe. The water-cooling conduit includes an outer tube assembly and an inner tube. The outer tube assembly is sleeved outside the inner tube. The front ends of the inner tube and the outer tube assembly are connected and closed to each other, so that the front end of the inner cavity of the inner tube is open. The rear end of the outer tube assembly is inserted into the handle. There are a communicating water inlet channel and a water outlet channel between the outer tube assembly and the inner tube. The water inlet pipe is inserted into the handle and seamlessly communicates with the rear end of the water inlet channel. The water outlet pipe is inserted into the handle and seamlessly communicates with the rear end of the water outlet channel. The radiofrequency electrode can be inserted into the handle and enter the rear end of the inner tube and then extend out of the front end of the inner tube, and can accurately sense the temperature of the ablation area during minimally invasive radiofrequency surgery for precise adjustment.

Description

Technical Field

[0001] The present application relates to the technical field of medical water-cooled electrodes, and in particular to an internal circulation water-cooled electrode kit with an adjustable temperature sensor position. Background Art

[0002] Water-cooled electrodes are widely used in minimally invasive radiofrequency surgeries, especially in the fields of tumor ablation and nerve ablation. When in use, liquid flows inside the water-cooled electrode, taking away the heat from the electrode surface, so that more radiofrequency energy is required to maintain the set temperature. According to the water circulation structure, it can be divided into internal circulation water-cooled electrodes and external circulation water-cooled electrodes. Internal circulation water-cooled electrodes mean that the liquid will not enter the human body and will only circulate in the liquid pipeline; external circulation water-cooled electrodes mean that the liquid enters the human tissue.

[0003] The patent application with application number CN202410795166.0 discloses a hot and cold electrode needle that can monitor temperature, which includes a syringe and an outer tube, and also includes a refrigeration tube. The refrigeration tube is arranged inside the syringe, and a heating resistance wire is arranged on the outside of the refrigeration tube. The heating resistance wire is arranged inside the syringe. A temperature sensor is arranged on the heating resistance wire, and the temperature sensor is arranged below the refrigeration tube. A glue ring layer is arranged at the connection between the syringe and the outer tube. A positive electrode is arranged on the syringe, and a negative electrode is arranged on the outer tube. The positive electrode and the negative electrode are made of conductive material. The positive electrode is embedded in the surface of the syringe, and the negative electrode is embedded in the surface of the outer tube. By arranging the positive electrode and the negative electrode, the syringe has multiple electrodes, so that two different voltages can be applied to these multiple electrodes, thereby realizing the transfer of specific energy to biological tissues; at the same time, by arranging the temperature sensor, the heating function and the cooling function can be realized, which can avoid inserting multiple electrodes into the organism to cause greater damage to the organism. The temperature sensor of the hot and cold electrode needle is completely wrapped in the syringe. The temperature sensor can only measure the temperature of the electrode surface, and cannot measure the highest temperature of the water-cooled radio frequency, that is, the high temperature of the electrode periphery. For example, the temperature measured by the temperature sensor is 45 degrees, while the temperature of the actual ablation area is 90 degrees. Therefore, most of the current water-cooled electrodes use a power control mode to heat the biological tissue, and use the temperature feedback of the temperature sensor to infer the temperature of the ablation area, but lack accurate temperature feedback to adjust the temperature to the target temperature. Due to the different water content of different biological tissues, the temperature of the ablation area of ​​different biological tissues will be greatly different under the power control mode, which may easily lead to excessive or insufficient thermal coagulation.

[0004] In order to reduce the trauma to the human body, the diameter of the water-cooled electrode generally needs to be designed to be small. However, if the diameter is too small, the electrode needle (i.e., the radiofrequency electrode) of the current water-cooled electrode is generally arranged in the center of the water-cooled electrode, and the water inlet pipe and the water outlet pipe inside the water-cooled electrode are both pipes with a circular cross-section, resulting in the water inlet pipe and the water outlet pipe being too thin. Coupled with the certain length of the water pipes, the pressure to circulate the water is very large, and there is no corresponding equipment that can be actually used to make the water circulate. Summary of the Invention

[0005] In view of the problem that the temperature measurement sensor of the current hot and cold type electrode needle is completely wrapped in the syringe barrel, and the temperature measurement sensor can only measure the temperature of the electrode surface and cannot measure the highest temperature of the water-cooled radiofrequency, this application proposes an inner-circulation water-cooled electrode kit with an adjustable position of the temperature measurement sensor and adopts the following technical solutions.

[0006] An inner-circulation water-cooled electrode kit with an adjustable position of the temperature measurement sensor includes a water-cooling device and a radiofrequency electrode. The water-cooling device includes a water-cooling catheter, a handle, a water inlet pipe, and a water outlet pipe.

[0007] The water-cooling catheter includes an outer tube assembly and an inner tube. The outer tube assembly is sleeved outside the inner tube. The front ends of the inner tube and the outer tube assembly are connected and closed to each other, and the front end of the inner cavity of the inner tube is open.

[0008] The rear end of the outer tube assembly is inserted into the handle. There are a communicating water inlet channel and a water outlet channel between the outer tube assembly and the inner tube. The water inlet pipe is inserted into the handle and seamlessly communicates with the rear end of the water inlet channel. The water outlet pipe is inserted into the handle and seamlessly communicates with the rear end of the water outlet channel.

[0009] The radiofrequency electrode can be inserted into the handle and enter the rear end of the inner tube and then extend out of the front end of the inner tube.

[0010] By adopting the above technical solutions, the position of the radiofrequency electrode in the inner tube is adjustable. The front end of the radiofrequency electrode can extend out of the inner tube and also out of the outer tube assembly, and the extended length can be adjusted to sense the ambient temperature outside the outer tube assembly. That is, the accurate temperature of the ablation area can be sensed during minimally invasive radiofrequency surgery. Therefore, the temperature of the ablation area can be accurately adjusted to the required temperature by adjusting the heating power. At the same time, water is continuously passed to cool the electrode, avoiding the electrode temperature from being too high, preventing the tissue temperature around the electrode from being too high, and avoiding damage to normal tissues.

[0011] A preferred solution of the inner-circulation water-cooled electrode kit with an adjustable position of the temperature measurement sensor is that the radiofrequency electrode is threadedly connected to the inner tube.

[0012] By adopting the above technical solution, the radiofrequency electrode can move relative to the internal pipe thread, so that the length of the radiofrequency electrode extending out of the inner pipe can be accurately controlled.

[0013] A preferred solution of the internally circulated water-cooled electrode kit with adjustable temperature sensor position is that the part of the radiofrequency electrode extending out of the front end of the inner pipe is wrapped with an insulating layer.

[0014] By adopting the above technical solution, the part of the radiofrequency electrode extending out of the inner pipe is used for temperature measurement. This part is wrapped with an insulating layer, which can prevent the electrode of the extending part from forming a thermal coagulation mass and reduce the influence of the generation of the thermal coagulation mass on temperature measurement.

[0015] A preferred solution of the internally circulated water-cooled electrode kit with adjustable temperature sensor position is that the water-cooling conduit includes a front head pipe and a three-chamber pipe.

[0016] The front head pipe includes a front outer pipe and the inner pipe. The front outer pipe is sleeved outside the front section of the inner pipe, and the front end of the front outer pipe wraps around to the front pipe edge of the inner pipe, so that the front end of the inner pipe and the front end of the outer pipe are connected and closed to each other, and the front end of the inner cavity of the inner pipe is opened.

[0017] The three-chamber pipe includes a sleeve, a first partition, a second partition and a rear outer pipe. The sleeve is located inside the rear outer pipe. Both the first partition and the second partition are connected between the sleeve and the rear outer pipe, and the space between the sleeve and the rear outer pipe is divided into the water inlet channel and the water outlet channel.

[0018] The inner pipe is inserted into the sleeve, and the front outer pipe is butted against the rear outer pipe. The front outer pipe is hermetically connected to the rear outer pipe to form the outer pipe assembly. The rear outer pipe is inserted into the handle. The water inlet channel and the water outlet channel communicate in the front outer pipe.

[0019] By adopting the above technical solution, the three-chamber pipe can be made of PEEK material and can be prepared by integral injection molding. The front head pipe can be made of stainless steel material. Both can be easily prepared and then assembled together to obtain the water-cooling conduit. When this kit is used in surgery, its diameter needs to be designed to be smaller to reduce the harm to the human body. The first partition and the second partition of this kit divide the space between the outer pipe assembly and the sleeve into a water inlet channel and a water outlet channel that are both semi-circular ring-shaped, which have a large cross-sectional area, a large water flow rate, a small water pressure required for water passing, a wide range of available pressurizing devices, cost savings and energy conservation.

[0020] A preferred solution for the inner circulation water-cooled electrode kit with adjustable temperature sensor position is that the sleeve is located at the center of the rear outer tube. The inner tube is located at the center of the outer tube assembly. The inner diameter of the sleeve is equal to the outer diameter of the inner tube. The outer diameter of the rear outer tube is equal to the inner diameter of the front outer tube. The rear outer tube is inserted into the front outer tube.

[0021] By adopting the above technical solution, the front head tube and the three-chamber tube are tightly fitted, glue can be applied between the sleeve and the inner tube for further sealing, and glue can also be applied between the front outer tube and the rear outer tube for sealing to prevent water seepage.

[0022] A preferred solution for the inner circulation water-cooled electrode kit with adjustable temperature sensor position is that the outer tube assembly is an integral pipe. The inner tube is located at the center of the outer tube assembly. The water-cooled conduit further includes an embedded water pipe. The embedded water pipe is arranged between the inner tube and the outer tube assembly. The front end of each embedded water pipe is not connected to the front end of the outer tube assembly. The inner cavity of the embedded water pipe is the water inlet channel. The space between the embedded water pipe and the outer tube assembly is the water outlet channel. The cross-section of the embedded water pipe is oval or semi-circular.

[0023] By adopting the above technical solution, the integral outer tube assembly can be made of stainless steel. Since this pipe does not use two pipe segments spliced together, it is not easy to seep water. The embedded water pipe can be fixed at the handle end. For the scheme where the cross-section of the embedded water pipe is circular or oval, the cross-sectional area can be set larger, which can be larger than the scheme with a circular cross-section.

[0024] A preferred solution for the inner circulation water-cooled electrode kit with adjustable temperature sensor position is that the outer tube assembly is an integral pipe. The inner tube is a straight circular tube and is entirely offset from the center of the outer tube assembly. The water-cooled conduit further includes an embedded water pipe. The embedded water pipe is fixed between the inner tube and the outer tube assembly. The front end of the embedded water pipe is not connected to the front end of the outer tube assembly. The inner cavity of the embedded water pipe is the water inlet channel. The space between the embedded water pipe and the outer tube assembly is the water outlet channel.

[0025] By adopting the above technical solution, since the inner tube is offset from the center of the outer tube assembly, a relatively large space is left inside the outer tube assembly. An embedded water pipe is installed in this space, and the cross-section of the embedded water pipe can be designed to be relatively large, which can increase its water flow rate, reduce the water passing pressure, reduce the wall thickness requirements for the inner tube and the outer tube assembly, and the diameter of this kit can be designed to be smaller, reducing the harm to the human body during surgery.

[0026] A preferred solution for the inner circulation water-cooled electrode kit with adjustable temperature sensor position is that the outer tube assembly is an integral pipe. The inner tube is a round tube. The rear section of the inner tube is a straight tube and deviates from the center of the outer tube assembly. The front section of the inner tube is inclined and connected to the front center of the outer tube assembly. The water-cooling conduit further includes an embedded water pipe. The embedded water pipe is fixed between the rear section of the inner tube and the outer tube assembly. The embedded water pipe, the rear section of the inner tube, and the outer tube assembly are parallel to each other. The inner cavity of the embedded water pipe is the water inlet channel. The space between the embedded water pipe and the outer tube assembly is the water outlet channel.

[0027] By adopting the above technical solution, since the rear section of the inner tube deviates from the center of the outer tube assembly, a relatively large space is left inside the outer tube assembly. The embedded water pipe is installed in this space, and the cross-section of the embedded water pipe can be designed to be relatively large, which can increase its water flow rate, reduce the water pressure, and the front section of the inner tube is located at the center of the outer tube assembly. Correspondingly, the front end of the radiofrequency electrode inserted into the inner tube is at the center of the outer tube assembly, which is more convenient for surgical alignment.

[0028] A preferred solution for the inner circulation water-cooled electrode kit with adjustable temperature sensor position is that the embedded water pipe is a straight round tube.

[0029] By adopting the above technical solution, the cross-section of the embedded water pipe is circular. Since a section of the inner tube opposite to the embedded water pipe deviates from the center of the outer tube assembly, the cross-section of the embedded water pipe can be designed to be relatively large, and at the same time, a relatively large space between the embedded water pipe and the outer tube is left as the water outlet channel, making the water inlet and outlet pressures more balanced.

[0030] A preferred solution for the inner circulation water-cooled electrode kit with adjustable temperature sensor position is that the inner circulation water-cooled electrode kit further includes a puncture assembly. The puncture assembly includes a needle core and a needle sleeve. The needle core can be adaptively inserted into the needle sleeve. After the needle core is pulled out, the outer tube assembly can be adaptively inserted into the needle sleeve.

[0031] By adopting the above technical solution, the puncture assembly is used to make an opening in biological tissue. After the needle core is pulled out, the outer tube assembly is inserted into the remaining needle sleeve to ablate the tissue.

[0032] In summary, the inner circulation water-cooled electrode kit with an adjustable temperature measurement sensor position of the present application has the following beneficial effects: The front end of the inner tube is an open mouth, and the RF electrode inserted into the inner tube can extend out of the inner tube, so that the position of the temperature measurement sensor installed at the front end of the RF electrode can be adjusted, thus adapting to various biological tissue situations and monitoring accurate RF temperatures. When the inner tube is set at the center of the outer tube assembly, a water inlet channel with a non-circular cross-section, such as an oval or semi-circular ring shape, is correspondingly set to increase the water inlet area and reduce the water inlet pressure. When the inner tube is set to deviate from the center of the outer tube assembly, the cross-section of the embedded water pipe can be set to be circular, so that the electrode kit has relatively large and balanced water inlet and outlet channels, reducing the water inlet and outlet pressures and increasing the cooling water flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a combined diagram of the inner circulation water-cooled electrode kit with an adjustable temperature measurement sensor position.

[0034] Figure 2 It is for Figure 1 the three-dimensional structure of the bottommost sub-diagram of

[0035] Figure 3 It is for Figure 1 the cross-sectional view of the water-cooled catheter among

[0036] Figure 4 It is for Figure 3 the enlarged view of area A of

[0037] Figure 5 It is for Figure 2 the structure diagram after hiding the handle and the needle sleeve.

[0038] Figure 6 It is for Figure 5 another perspective view of , including the water-cooled catheter of the first implementation structure.

[0039] Figure 7 It is for Figure 6 the structure diagram of the front head tube among

[0040] Figure 8 It is for Figure 6 the cross-sectional structure diagram of the triple lumen tube among

[0041] Figure 9 It is for Figure 6 the cross-sectional view of

[0042] Figure 10 It is for Figure 9 the enlarged view of area B of

[0043] Figure 11 It is the cross-sectional view of the water-cooled catheter of the second implementation structure.

[0044] Figure 12is Figure 11 Enlarged view of region C.

[0045] Figure 13 Cross-sectional structure diagram of the water-cooled conduit of the second implementation structure with only one oval inner tube.

[0046] Figure 14 Cross-sectional structure diagram of the water-cooled conduit of the second implementation structure with only one semi-circular ring-shaped inner tube.

[0047] Figure 15 Cross-sectional structure diagram of the water-cooled conduit of the third implementation structure.

[0048] Figure 16 Cross-sectional view of the water-cooled conduit of the third implementation structure with a straight inner tube.

[0049] Figure 17 is Figure 16 Enlarged view of region D.

[0050] Figure 18 Cross-sectional view of the water-cooled conduit of the third implementation structure with a bent section in the inner tube.

[0051] Figure 19 is Figure 18 Enlarged view of region E.

[0052] Figure 20 is Figure 18 Stereogram without sectioning.

[0053] Figure 21 is Figure 20 Enlarged view of region F.

[0054] Reference numerals: 1, water-cooling device; 2, radiofrequency electrode; 11, water-cooled conduit; 12, handle; 13, water inlet pipe; 14, water outlet pipe; 111, outer tube assembly; 112, inner tube; 113, water inlet channel; 114, water outlet channel; 115, lining core; 15, puncture assembly; 151, needle core; 152, needle sleeve; 116, front head tube; 117, triple lumen tube; 1161, front outer tube; 1171, sleeve; 1172, rear outer tube; 1173, first partition; 1174, second partition; 118, embedded water pipe. Detailed implementation manners

[0055] Next, the technical solutions in the embodiments will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the following embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0056] AsFigure 1 A kind of internal circulation water-cooled electrode kit with adjustable position of the temperature measuring sensor, comprising a water-cooling device 1 and a radiofrequency electrode 2. The radiofrequency electrode 2 is needle-shaped and is used for temperature measurement.

[0057] Combined with Figure 1 and Figure 2 , the water-cooling device 1 includes a water-cooling conduit 11, a handle 12, a water inlet pipe 13 and a water outlet pipe 14.

[0058] As Figure 3 and Figure 4 , the water-cooling conduit 11 includes an outer tube assembly 111 and an inner tube 112. There can be various implementation structures, but in all cases, the outer tube assembly 111 is sleeved outside the inner tube 112. The front end of the outer tube assembly 111 wraps around the front end of the inner tube 112 inward to form a seamless closed structure at the front ends of the outer tube assembly 111 and the inner tube 112. However, the inner cavity of the inner tube 112 is open, that is, the front end of the inner tube 112 is an open end. The inner tube 112 is provided for the radiofrequency electrode 2 to be inserted. The temperature measuring sensor at the front end of the radiofrequency electrode 2 can extend out of the inner tube 112 to detect the ambient temperature outside the inner tube 112, which is the temperature of biological tissue during the operation.

[0059] As Figure 5 , the radiofrequency electrode 2 has an external thread, and the inner wall of the inner tube 112 has an internal thread. The radiofrequency electrode 2 is threadedly connected to the inner tube 112. By rotating the radiofrequency electrode 2, the length of the radiofrequency electrode 2 extending out of the inner tube 112 can be accurately adjusted.

[0060] There are also a water inlet channel 113 and a water outlet channel 114 between the outer tube assembly 111 and the inner tube 112 to pass cooling water to cool the electrode and prevent the electrode from damaging normal biological tissue due to excessive temperature.

[0061] The handle 12 is provided with an inner cavity, and this inner cavity has openings in three directions. The rear ends of the outer tube assembly 111 and the inner tube 112 are inserted into the first opening. This rear end is the inlet of the water inlet channel 113 and the outlet of the water outlet channel 114, both of which are located in the handle 12. The water inlet pipe 13 and the water outlet pipe 14 are respectively inserted into the second opening of the handle 12. Refer to Figure 5 , the water inlet pipe 13 is seamlessly communicated with the inlet of the water inlet channel 113, and the water outlet pipe 14 is seamlessly communicated with the outlet of the water outlet channel 114. The channel between the first opening and the third opening is straight. The channel facing inward from the second opening is perpendicular to the channel between the first opening and the third opening.

[0062] The radiofrequency electrode 2 is inserted from the third opening, then inserted into the inner tube 112, and finally extends out a short distance from the front end of the inner tube 112. The handle 12 is provided with a precision thread and can cooperate with the water-cooling conduit 11 to control the length of the radiofrequency electrode 2 extending out and enable the temperature measuring sensor to measure the highest temperature in the radiofrequency ablation area.

[0063] When this kit is applied in radiofrequency surgery, since the inner tube 112 is a hollow tube, if the water-cooled catheter 11 is directly inserted into biological tissue, the biological tissue is likely to enter the inner tube 112, making it difficult to insert the radiofrequency electrode 2 into the inner tube 112. Therefore, when inserting the water-cooled catheter 11 into biological tissue, a liner core 115 is inserted into the inner tube 112. The liner core 115 is needle-shaped with a round block at the rear end, and the front end of the liner core 115 extends out of the inner tube 112. After inserting the kit into biological tissue, grasp the round block by hand and pull out the liner core 115, then insert the radiofrequency electrode 2 into the inner tube 112 and extend it from the front end for temperature monitoring.

[0064] Such as Figure 1 , before inserting the water-cooled catheter 11 into biological tissue, it is necessary to pre-open the biological tissue. The inner circulation water-cooled electrode kit further includes a puncture assembly 15. The puncture assembly 15 includes a needle core 151 and a needle sleeve 152. The needle core 151 is adaptively inserted into the needle sleeve 152 and extends out of the needle sleeve 152, and the front end of the needle core 151 is spiked. During radiofrequency surgery, insert the puncture assembly 15 into biological tissue to guide abnormal biological tissue, then pull out the needle core 151 and leave the needle sleeve 152 in the biological tissue. Then insert the outer tube assembly 111 with the liner core 115 into the needle sleeve 152, then pull out the liner core 115, and insert the radiofrequency electrode 2 into the inner tube 112 for temperature monitoring. The part of the radiofrequency electrode 2 extending out of the front end of the inner tube 112 can be wrapped with an insulating layer to prevent the formation of a thermal coagulation mass, so as not to affect the accuracy of temperature measurement.

[0065] The water-cooled catheter 11 has various implementation structures, which will be described in detail below.

[0066] Such as Figure 6 , the first implementation structure of the water-cooled catheter 11 is that the water-cooled catheter 11 includes a front head tube 116 and a three-chamber tube 117. The front head tube 116 is made of stainless steel, and the three-chamber tube 117 is made of peek (polyether ether ketone). These two tubes are spliced to obtain the water-cooled catheter 11. Such as Figure 7 , the front head tube 116 includes a coaxial front outer tube 1161 and an inner tube 112. The front end of the front outer tube 1161 is hemispherical. The longer inner tube 112 is fixed at the center of the shorter front outer tube 1161, that is, at the vertex of the hemispherical shape, and the front end of the front outer tube 1161 does not seal the front end of the inner tube 112, so that the front end of the inner tube 112 leads to the outside of the front outer tube 1161, enabling the front end of the radiofrequency electrode 2 inserted into the inner tube 112 to extend out of the inner tube 112 and the front outer tube 1161 to sense the true ablation temperature of abnormal biological tissue.

[0067] Such as Figure 8, in the first implementation structure of the water-cooled catheter 11, the three-chamber tube 117 includes an internal sleeve 1171, an external rear outer tube 1172, and intermediate first and second partitions 1173 and 1174. The inner diameter of the sleeve 1171 is equal to the outer diameter of the inner tube 112, such that the inner tube 112 can be fittingly inserted into the sleeve 1171, and glue can also be applied between the sleeve 1171 and the inner tube 112 for further sealing. The outer diameter of the rear outer tube 1172 is equal to the inner diameter of the front outer tube 1161, such that when the inner tube 112 is inserted into the sleeve 1171, the rear outer tube 1172 is fittingly inserted into the front outer tube 1161, and glue is applied between the rear outer tube 1172 and the front outer tube 1161 for sealing. The rear outer tube 1172 and the front outer tube 1161 form the outer tube assembly 111. The first partition 1173 and the second partition 1174 are located on both sides of the sleeve 1171, and the first partition 1173 and the second partition 1174 are in the same plane, which plane passes through the axis of the sleeve 1171. The first partition 1173 is seamlessly connected to the sleeve 1171 and the rear outer tube 1172. The second partition 1174 is seamlessly connected to the sleeve 1171 and the rear outer tube 1172. The first partition 1173 and the second partition 1174 separate the space between the sleeve 1171 and the rear outer tube 1172 into two channels, namely the water inlet channel 113 and the water outlet channel 114, and the cross-sections of the water inlet channel 113 and the water outlet channel 114 are both semi-circular rings. The water inlet channel 113, the water outlet channel 114, and the internal space of the sleeve 1171 form the three chambers of the three-chamber tube 117.

[0068] As Figure 9 and Figure 10 , in the first implementation structure of the water-cooled catheter 11, since the front end of the front outer tube 1161 is hemispherical, the three-chamber tube 117 cannot be fully inserted into the bottom of the front outer tube 1161, such that the water inlet channel 113 and the water outlet channel 114 communicate with each other in the front outer tube 1161 to form a loop.

[0069] In the first implementation structure of this water-cooled catheter 11, the length by which the radiofrequency electrode 2 extends out of the water-cooled catheter 11 is adjustable, and the maximum temperature of the ablation area can be measured. The water-cooled catheter 11 has a relatively large cross-sectional area of the water inlet channel 113 and the water outlet channel 114, reducing the requirement for pump pressure.

[0070] As Figure 11 and Figure 12 , the second implementation structure of the water-cooled catheter 11 is that the outer tube assembly 111 is an integral stainless steel outer tube. The outer tube assembly 111 and the inner tube 112 are both long tubes, and the inner tube 112 is fixed at the center of the outer tube. The front end of the outer tube assembly 111 is also hemispherical, wrapping to the front edge of the inner tube 112, and the front end of the inner tube 112 is also an open end.

[0071] As Figure 13, a stainless - steel - embedded water pipe 118 is also installed between the outer pipe and the inner pipe 112. The inner cavity of the embedded water pipe 118 is the water inlet channel 113, and the other area between the outer pipe assembly 111 and the inner pipe 112 is the water outlet channel 114. The embedded water pipe 118 does not abut against the front end of the outer pipe assembly 111, which is beneficial for water discharge.

[0072] The two sub - structures of the second implementation structure where the above - mentioned inner pipe 112 is fixed at the center of the outer pipe are as follows: (1) As Figure 13 , the water - cooled conduit 11 has only one embedded water pipe 118, whose cross - section is oval, and the cross - sectional area can be 0.071 mm 2 ; (2) As Figure 14 , the water - cooled conduit 11 has only one embedded water pipe 118, which is semi - circular - ring - shaped in cross - section, and the cross - sectional area can be 0.212 mm 2 .

[0073] For the second implementation structure where the above - mentioned inner pipe 112 is fixed at the center of the outer pipe, if the cross - section of the embedded water pipe 118 is circular, the embedded water pipe 118 is too thin, which will cause too much pressure required for water circulation.

[0074] As Figure 15 , the third implementation structure of the water - cooled conduit 11 is that the outer pipe assembly 111 is an integral stainless - steel outer pipe, both the outer pipe and the inner pipe 112 are long pipes, the inner pipe 112 deviates from the center of the outer pipe assembly 111, and the cross - section of the embedded water pipe 118 is circular. This structure is further divided into two types of structures: (1) As Figure 16 and Figure 17 , the first type is that the inner pipe 112 is a circular straight pipe, the whole inner pipe 112 deviates from the center of the outer pipe assembly 111, and the embedded water pipe 118 is arranged between the inner pipe 112 and the outer pipe assembly 111; (2) As Figure 18 and Figure 19 , the second type is that the inner pipe 112 is a bent pipe, and the inner pipe 112 specifically includes a straight - line - shaped rear section, an inclined middle section, and a straight - line - shaped front section that are connected to each other. The straight - line - shaped rear section deviates from the center of the outer pipe assembly 111, the straight - line - shaped front section is located at the center of the outer pipe assembly 111, and the inclined middle section connects the straight - line - shaped rear section and the straight - line - shaped front section. The inclined middle section guides from the position deviating from the center of the outer pipe to the center of the outer pipe assembly 111. The depth that the embedded water pipe 118 extends into the outer pipe assembly 111 is less than the length of the straight - line - shaped rear section. Therefore, the embedded water pipe 118 will not touch the inclined middle section and does not interfere with the inclined trend of the inclined middle section. The RF electrode 2 itself can be bent through the inner pipe 112, that is, bent through the straight - line - shaped rear section, the inclined middle section, and the straight - line - shaped front section, and finally extends out of the straight - line - shaped front section, and the highest temperature of the external biological ablation area can be measured.

[0075] As Figure 20 and Figure 21, for the third implementation structure where the above-mentioned inner tube 112 deviates from the center of the outer tube, the cross-section of the embedded water pipe 118 is circular, and the diameter of the embedded water pipe 118 can be set relatively large. For example, the internal cross-sectional area of the embedded water pipe 118 is 0.202 mm 2 , this design increases the water flow rate and reduces the requirement for the inlet water pump pressure.

[0076] For the water-cooled electrode kit of the above three implementation structures, the outer tube wraps the front edge of the inner tube 112, and the front port of the inner tube 112 is open, so that after the radiofrequency electrode 2 is inserted into the inner tube 112, it can extend beyond the inner tube 112 and the outer tube, and the highest temperature in the ablation area can be monitored, which is beneficial to regulating the heating power to smoothly complete the ablation operation of abnormal biological tissues. In order to reduce the trauma to the human body, the cross-section of the water-cooled electrode in this application can be designed to be smaller, and a situation can be set where the inner tube deviates from the center of the outer tube assembly. Then, the cross-section of the embedded water pipe can be set to be circular, so that the electrode kit has relatively large balanced inlet and outlet channels, reduces the inlet and outlet water pressure, and increases the cooling water flow rate. Another situation is that the inner tube is set at the center of the outer tube assembly, and a non-circular cross-section inlet channel is correspondingly set, such as an oval, a semi-circular ring, etc., to increase the inlet area, reduce the inlet and outlet water pressure, and increase the cooling water circulation flow rate.

[0077] Although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An internal circulation water-cooled electrode kit with adjustable temperature sensor position, characterized in that: It comprises a water cooling device (1) and a radio frequency electrode (2); the water cooling device (1) comprises a water cooling conduit (11), a handle (12), a water inlet pipe (13) and a water outlet pipe (14); The water-cooling conduit (11) comprises an outer tube assembly (111) and an inner tube (112); the outer tube assembly (111) is sleeved outside the inner tube (112); the front end of the inner tube (112) and the front end of the outer tube assembly (111) are connected and closed to each other, and the front end of the inner cavity of the inner tube (112) is open; The rear end of the outer tube assembly (111) is inserted into the handle (12); a water inlet channel (113) and a water outlet channel (114) are connected between the outer tube assembly (111) and the inner tube (112); the water inlet pipe (13) is inserted into the handle (12) and is seamlessly connected to the rear end of the water inlet channel (113); the water outlet pipe (14) is inserted into the handle (12) and is seamlessly connected to the rear end of the water outlet channel (114); The radio frequency electrode (2) can be inserted into the handle (12) and enter the rear end of the inner tube (112) and then extend out of the front end of the inner tube (112); The radio frequency electrode (2) is threadedly connected to the inner tube (112); The water-cooling conduit (11) comprises a front head tube (116) and a three-lumen tube (117); The front head tube (116) comprises a front outer tube (1161) and the inner tube (112); the front outer tube (1161) is sleeved outside the front section of the inner tube (112), and the front end of the front outer tube (1161) is wrapped around the front tube edge of the inner tube (112), so that the front end of the inner tube (112) and the front end of the outer tube are connected and closed to each other, and the front end of the inner cavity of the inner tube (112) is open; The three-lumen tube (117) comprises a sleeve (1171), a first baffle (1173), a second baffle (1174) and a rear outer tube (1172); the sleeve (1171) is located in the rear outer tube (1172); the first baffle (1173) and the second baffle (1174) are both connected between the sleeve (1171) and the rear outer tube (1172), dividing the space between the sleeve (1171) and the rear outer tube (1172) into the water inlet channel (113) and the water outlet channel (114); The inner tube (112) is inserted into the sleeve (1171); the front outer tube (1161) is connected to the rear outer tube (1172); the front outer tube (1161) is sealed and connected to the rear outer tube (1172) to form the outer tube assembly (111); the rear outer tube (1172) is inserted into the handle (12); the water inlet channel (113) and the water outlet channel (114) are connected in the front outer tube (1161); The temperature sensor is installed at the front end of the radio frequency electrode (2).

2. The internal circulation water-cooled electrode kit with adjustable temperature sensor position according to claim 1, characterized in that: The portion of the radio frequency electrode (2) extending out from the front end of the inner tube (112) is wrapped with an insulating layer.

3. The internal circulation water-cooled electrode kit with adjustable temperature sensor position according to claim 1, characterized in that: The sleeve (1171) is located at the center of the rear outer tube (1172); the inner tube (112) is located at the center of the outer tube assembly (111); the inner diameter of the sleeve (1171) is equal to the outer diameter of the inner tube (112); the outer diameter of the rear outer tube (1172) is equal to the inner diameter of the front outer tube (1161); and the rear outer tube (1172) is inserted into the front outer tube (1161).

4. The internal circulation water-cooled electrode kit with adjustable temperature sensor position according to claim 1, characterized in that: The internal circulation water-cooled electrode kit further comprises a puncture assembly (15); the puncture assembly (15) comprises a needle core (151) and a needle sleeve (152); the needle core (151) can be adaptively inserted into the needle sleeve (152); after the needle core (151) is pulled out, the outer tube assembly (111) can be adaptively inserted into the needle sleeve (152).

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