Internal circulation water-cooled electrode kit with adjustable temperature measurement sensor position

Abstract

The invention relates to the technical field of medical water-cooled electrodes, and particularly discloses an internal circulation water-cooled electrode kit capable of adjusting the position of a temperature measurement sensor. The internal circulation water cooling electrode kit comprises a water cooling device and a radio frequency electrode. The water-cooling device comprises a water-cooling conduit, a handle, a water inlet pipe and a water outlet pipe. The water-cooled conduit includes an outer tube assembly and an inner tube. And the outer pipe assembly is sleeved outside the inner pipe. The front end of the inner tube and the front end of the outer tube assembly are mutually connected and closed, so that the front end of an inner cavity of the inner tube is open. The rear end of the outer pipe assembly is inserted into the handle. A water inlet channel and a water outlet channel which are communicated are arranged between the outer pipe assembly and the inner pipe. The water inlet pipe is inserted into the handle and seamlessly communicated with the rear end of the water inlet channel. The water outlet pipe is inserted into the handle and seamlessly communicated with the rear end of the water outlet channel. The radio frequency electrode can be inserted into the handle, enters the rear end of the inner tube and then extends out of the front end of the inner tube, the temperature of an ablation area can be accurately sensed in a minimally invasive radio frequency operation, and accurate adjustment is facilitated.

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 trauma to the human body, the diameter of the water-cooled electrode generally needs to be designed to be smaller. However, if the diameter is too small, the electrode needle (i.e., the RF electrode) of the current water-cooled electrode is generally set at the center of the water-cooled electrode, and the water inlet pipe and outlet pipe inside the water-cooled electrode are both tubes with a circular cross-section, which makes the water inlet pipe and outlet pipe too thin. In addition, the water pipe has a certain length, which causes the pressure of water circulation to be very high. There is no corresponding equipment that can be actually used to circulate the water. Summary of the invention

[0005] In view of the fact that the temperature sensor of the current hot and cold electrode needles is completely wrapped in the syringe, the temperature sensor can only measure the temperature of the electrode surface but cannot measure the maximum temperature of the water-cooled RF. This application proposes an internal circulation water-cooled electrode kit with adjustable temperature sensor position, and adopts the following technical solution.

[0006] A temperature sensor position-adjustable internal circulation water-cooled electrode kit comprises a water cooling device and a radio frequency electrode. The water cooling device comprises a water cooling conduit, a handle, a water inlet pipe and a water outlet pipe.

[0007] The water-cooling conduit comprises an outer tube assembly and an inner tube. The outer tube assembly is sleeved outside the inner tube. The front end of the inner tube and the front end of 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. A water inlet channel and a water outlet channel are connected between the outer tube assembly and the inner tube. The water inlet pipe is inserted into the handle and seamlessly connected to the rear end of the water inlet channel. The water outlet pipe is inserted into the handle and seamlessly connected to the rear end of the water outlet channel.

[0009] The radio frequency 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 solution, the position of the RF electrode in the inner tube is adjustable, and the front end of the RF electrode can extend out of the inner tube and the outer tube assembly, and the extension length can be adjusted to sense the ambient temperature outside the outer tube assembly, so that the accurate temperature of the ablation area can be sensed in minimally invasive RF 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 to prevent the electrode temperature from being too high, prevent the temperature of the tissue around the electrode from being too high, and avoid damage to normal tissue.

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

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

[0013] A preferred solution of the internal circulation water-cooled electrode kit with adjustable temperature sensor position is that the portion of the radio frequency electrode extending out of the front end of the inner tube is wrapped with an insulating layer.

[0014] By adopting the above technical solution, the part of the RF electrode extending out of the inner tube is used for temperature measurement. This part is wrapped with an insulating layer, which can prevent the extended part of the electrode from forming a thermal condensate, thereby reducing the influence of the formation of the thermal condensate on the temperature measurement.

[0015] A preferred solution of the internal circulation water-cooled electrode kit with adjustable temperature sensor position is that the water-cooled catheter includes a front head tube and a three-lumen tube.

[0016] The front head tube comprises a front outer tube and the inner tube. The front outer tube is sleeved outside the front section of the inner tube, and the front end of the front outer tube is wrapped around the front tube edge of the inner tube, so that the front ends of the inner tube and the outer tube are connected and closed to each other, and the front end of the inner cavity of the inner tube is open.

[0017] The three-lumen tube comprises a sleeve, a first baffle, a second baffle and a rear outer tube. The sleeve is located in the rear outer tube. The first baffle and the second baffle are both connected between the sleeve and the rear outer tube to separate the space between the sleeve and the rear outer tube into the water inlet channel and the water outlet channel.

[0018] The inner tube is inserted into the sleeve, and the front outer tube is connected to the rear outer tube. The front outer tube is sealed and connected to the rear outer tube to form the outer tube assembly. The rear outer tube is inserted into the handle. The water inlet channel and the water outlet channel are connected in the front outer tube.

[0019] By adopting the above technical solution, the three-lumen tube can be made of peek material and can be prepared by integral injection molding, and the front head tube can be made of stainless steel. Both can be easily prepared and then assembled together to obtain a water-cooled catheter. The kit is used in surgery, and its diameter needs to be designed to be smaller to reduce damage to the human body. The first partition and the second partition of the kit separate the space between the outer tube assembly and the sleeve into a semicircular water inlet channel and a water outlet channel with a larger cross-sectional area, a large water flow rate, and a small water pressure required for water flow. A wide range of pressurizing devices can be selected, saving costs and energy.

[0020] A preferred solution of the internal circulation water-cooled electrode set 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-lumen 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 of the internal circulation water-cooled electrode kit with adjustable position of the temperature sensor is that the outer tube assembly is an integrated tube. The inner tube is located at the center of the outer tube assembly. The water-cooling conduit also 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 an elliptical or semicircular ring.

[0023] By adopting the above technical solution, the integrated outer tube assembly can be made of stainless steel, and the tube does not use two tube sections for splicing, so it is not easy to leak water. The embedded water pipe can be fixed at the handle end. In the case where the cross section of the embedded water pipe is circular or elliptical, the cross-sectional area can be set larger, which can be larger than the solution with a circular cross section.

[0024] A preferred solution of the internal circulation water-cooled electrode kit with adjustable position of the temperature sensor is that the outer tube assembly is an integrated tube. The inner tube is a straight round tube and is offset from the center of the outer tube assembly as a whole. The water-cooling conduit also 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 deviates from the center of the outer tube assembly, a larger space is left inside the outer tube assembly, and an embedded water pipe is installed in the space. The cross-section of the embedded water pipe can be designed to be relatively large, thereby increasing its water flow rate, reducing the water flow pressure, and reducing the wall thickness requirements for the inner tube and outer tube assemblies. The diameter of the kit can be designed to be smaller, thereby reducing damage to the human body during surgery.

[0026] A preferred solution of the internal circulation water-cooled electrode kit with adjustable position of the temperature sensor is that the outer tube assembly is an integrated 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 obliquely connected to the front end center of the outer tube assembly. The water-cooling duct also 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 larger space is left inside the outer tube assembly, and an embedded water pipe is installed in the space. The cross-section of the embedded water pipe can be designed to be larger, thereby increasing its water flow rate and reducing the water flow pressure. In addition, the front section of the inner tube is located at the center of the outer tube assembly. Accordingly, the front end of the radio frequency electrode inserted into the inner tube is located at the center of the outer tube assembly, which is more convenient for surgical positioning.

[0028] A preferred solution of the internal circulation water-cooled electrode kit with adjustable temperature sensor position is that the embedded water pipe is a straight circular pipe.

[0029] By adopting the above technical solution, the cross-section of the embedded water pipe is circular. Since a section of the inner pipe relative to the embedded water pipe deviates from the center of the outer pipe assembly, the cross-section of the embedded water pipe can be designed to be larger. At the same time, a larger space is left between the embedded water pipe and the outer pipe as a water outlet channel, so that the water inlet and outlet pressures are more balanced.

[0030] A preferred solution of the internal circulation water-cooled electrode kit with adjustable temperature sensor position is that the internal circulation water-cooled electrode kit also 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, and 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 internal circulation water-cooled electrode kit with adjustable temperature 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 sensor installed at the front end of the RF electrode can be adjusted, so that it can adapt to the conditions of various biological tissues and monitor the accurate RF temperature. When the inner tube is set at the center of the outer tube assembly, a water inlet channel with a non-circular cross-section is set accordingly, such as an elliptical, semi-circular ring, etc., 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 a balanced and larger water inlet channel and water outlet channel, reducing the inlet and outlet water pressures and increasing the cooling water flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a diagram of the internal circulation water-cooled electrode kit with adjustable temperature sensor position.

[0034] Figure 2 for Figure 1 The three-dimensional structure of the bottom part of the figure.

[0035] Figure 3 for Figure 1 A cross-sectional view of the water cooling duct.

[0036] Figure 4 for Figure 3 A magnified image of area A.

[0037] Figure 5 for Figure 2 Schematic diagram with the handle and needle sleeve hidden.

[0038] Figure 6 for Figure 5 Another perspective view of the water cooling conduit including the first implementation structure.

[0039] Figure 7 for Figure 6 The structural diagram of the front head tube.

[0040] Figure 8 for Figure 6 A cross-sectional structural diagram of the three-lumen tube.

[0041] Fig. 9 for Figure 6 sectional view of .

[0042] Fig.10 for Fig. 9 A magnified view of area B.

[0043] Fig.11 This is a cross-sectional view of a water-cooling conduit according to a second embodiment of the structure.

[0044] Fig.12for Fig.11 Magnified view of area C.

[0045] Fig.13 The cross-sectional structure diagram of the water-cooling conduit of the second embodiment has only one elliptical embedded tube.

[0046] Fig.14 The cross-sectional structure diagram of the water-cooling conduit of the second embodiment structure having only one semicircular ring-shaped embedded tube.

[0047] Fig.15 This is a cross-sectional structural diagram of a water-cooling pipe according to a third implementation structure.

[0048] Fig.16 This is a water-cooling conduit of the third implementation structure, in which the inner tube is a straight-line cross-sectional view.

[0049] Fig.17 for Fig.16 Magnified view of area D.

[0050] Fig.18 This is a cross-sectional view of a water-cooling conduit of the third embodiment, wherein the inner tube has a bent section.

[0051] Fig.19 for Fig.18 Enlarged view of area E.

[0052] Fig. 20 for Fig.18 A perspective view without sectioning.

[0053] Fig.21 for Fig. 20 Magnified view of region F.

[0054] Figure numerals: 1. water cooling device; 2. radio frequency electrode; 11. water cooling catheter; 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. liner core; 15. puncture assembly; 151. needle core; 152. needle sleeve; 116. front head tube; 117. three-lumen tube; 1161. front outer tube; 1171. sleeve; 1172. rear outer tube; 1173. first partition; 1174. second partition; 118. embedded water tube. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the following embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0056] like Figure 1 , an internal circulation water-cooled electrode kit with adjustable temperature sensor position, comprising a water cooling device 1 and a radio frequency electrode 2. The radio frequency electrode 2 is needle-shaped and is used for temperature measurement.

[0057] Combination Figure 1 and Figure 2 The water cooling device 1 includes a water cooling pipe 11, a handle 12, a water inlet pipe 13 and a water outlet pipe 14.

[0058] like Figure 3 and Figure 4 The water-cooling catheter 11 includes an outer tube assembly 111 and an inner tube 112. There are multiple implementation structures, but all of them have the outer tube assembly 111 sleeved outside the inner tube 112, and the front end of the outer tube assembly 111 wraps around the front end of the inner tube 112 inwardly, forming a seamless closed structure of the front end of the outer tube assembly 111 and the front end of the inner tube 112, but the inner cavity of the inner tube 112 is open, that is, the front end of the inner tube 112 is an open mouth. The inner tube 112 is provided for the RF electrode 2 to be inserted, and the temperature sensor at the front end of the RF 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 the biological tissue during surgery.

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

[0060] There is also a water inlet channel 113 and a water outlet channel 114 between the outer tube assembly 111 and the inner tube 112, through which cooling water is passed to cool the electrode to prevent the electrode temperature from being too high to damage normal biological tissue.

[0061] The handle 12 has an inner cavity with openings in three directions. The rear end of the outer tube assembly 111 and the rear end of the inner tube 112 are inserted into the first opening. The 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. Figure 5 The water inlet pipe 13 is seamlessly connected to the inlet of the water inlet channel 113, and the water outlet pipe 14 is seamlessly connected to the outlet of the water outlet channel 114. The channel between the first opening and the third opening is linear. The channel from the second opening inward is perpendicular to the channel between the first opening and the third opening.

[0062] The RF electrode 2 is inserted from the third opening, then inserted into the inner tube 112, and finally extends a short distance from the front end of the inner tube 112. The handle 12 has a precision thread and can cooperate with the water-cooled catheter 11 to control the extension length of the RF electrode 2 and allow the temperature sensor to measure the highest temperature in the RF ablation area.

[0063] When the kit is used in radiofrequency surgery, since the inner tube 112 is a hollow tube, if the water-cooled catheter 11 is directly inserted into the biological tissue, the biological tissue is easy to enter the inner tube 112, making it difficult for the radiofrequency electrode 2 to be inserted into the inner tube 112. Therefore, when the water-cooled catheter 11 is inserted into the biological tissue, a liner 115 is also inserted into the inner tube 112. The liner 115 is needle-shaped, with a round block at the rear end and the front end of the liner 115 extending out of the inner tube 112. After the kit is inserted into the biological tissue, the round block is grasped by hand, the liner 115 is pulled out, and then the radiofrequency electrode 2 is inserted into the inner tube 112 and extended from the front end to perform temperature monitoring.

[0064] like Figure 1 Before the water-cooled catheter 11 is inserted into the biological tissue, the biological tissue needs to be pre-opened. The internal circulation water-cooled electrode kit also 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 in the shape of a spike. During radio frequency surgery, the puncture assembly 15 is inserted into the biological tissue, guided to the abnormal biological tissue, and then the needle core 151 is pulled out, the needle sleeve 152 is left in the biological tissue, and then the outer tube assembly 111 with the liner core 115 is inserted into the needle sleeve 152, and then the liner core 115 is pulled out, and the radio frequency electrode 2 is inserted into the inner tube 112 for temperature monitoring. The part of the radio frequency electrode 2 extending from the front end of the inner tube 112 can be wrapped with an insulating layer to prevent the formation of a thermal condensate so as not to affect the accuracy of temperature measurement.

[0065] The water-cooling pipe 11 has various implementation structures, which are described in detail below.

[0066] like Figure 6 The first implementation structure of the water-cooling conduit 11 is that the water-cooling conduit 11 includes a front head tube 116 and a three-lumen tube 117. The front head tube 116 is made of stainless steel, and the three-lumen tube 117 is made of peek (polyetheretherketone). The two tubes are spliced ​​to obtain the water-cooling conduit 11. 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 hemisphere, and 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, so that the front end of the radio frequency electrode 2 inserted into the inner tube 112 can extend out of the inner tube 112 and the front outer tube 1161 to sense the real ablation temperature of abnormal biological tissue.

[0067] like Figure 8In the first implementation structure of the water-cooling pipe 11, the three-lumen tube 117 includes an inner sleeve 1171, an outer rear outer tube 1172, and a first baffle 1173 and a second baffle 1174 in the middle. The inner diameter of the sleeve 1171 is equal to the outer diameter of the inner tube 112, so that the inner tube 112 can be inserted into the sleeve 1171 in an adaptive manner, and glue can 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, so that when the inner tube 112 is inserted into the sleeve 1171, the rear outer tube 1172 is inserted into the front outer tube 1161 in an adaptive manner, and glue is applied between the rear outer tube 1172 and the front outer tube 1161 for sealing, and 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 on the same plane, and the plane passes through the axis of the sleeve 1171. The first partition 1173 seamlessly connects the sleeve 1171 and the rear outer tube 1172. The second partition 1174 seamlessly connects 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 cavities, 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 semicircular. The water inlet channel 113, the water outlet channel 114 and the internal space of the sleeve 1171 constitute the three cavities of the three-cavity tube 117.

[0068] like Fig. 9 and Fig.10 In the first implementation structure of the water-cooling conduit 11, since the front end of the front outer tube 1161 is hemispherical, the three-lumen tube 117 cannot be completely inserted into the bottom of the front outer tube 1161, so that the water inlet channel 113 and the water outlet channel 114 are connected in the front outer tube 1161 to form a loop.

[0069] In the first embodiment of the water-cooling conduit 11, the length of the RF electrode 2 extending out of the water-cooling conduit 11 is adjustable, and the highest temperature of the ablation area can be measured. The water-cooling conduit 11 has a larger cross-sectional area of ​​the water inlet channel 113 and the water outlet channel 114, which reduces the requirement for pump pressure.

[0070] like Fig.11 and Fig.12 The second implementation structure of the water-cooling pipe 11 is that the outer tube assembly 111 is an integrated 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, wrapped to the front end edge of the inner tube 112, and the front end of the inner tube 112 is also open.

[0071] like Fig.13A stainless steel embedded water pipe 118 is installed between the outer tube and the inner tube 112. The inner cavity of the embedded water pipe 118 is the water inlet channel 113, and the other area between the outer tube assembly 111 and the inner tube 112 is the water outlet channel 114. The embedded water pipe 118 does not abut against the front end of the outer tube assembly 111, which is conducive to water outlet.

[0072] The two subdivision structures of the second implementation structure in which the inner tube 112 is fixed at the center of the outer tube are as follows: (1) Fig.13 The water-cooling conduit 11 has only one embedded water pipe 118, whose cross section is elliptical and the cross-sectional area can be 0.071mm 2 ; (2) If Fig.14 The water-cooling conduit 11 has only one embedded water pipe 118, which has a semicircular cross-section and a cross-sectional area of ​​0.212 mm 2 .

[0073] For the second implementation structure in which the inner tube 112 is fixed at the center of the outer tube, if the cross section of the embedded water tube 118 is circular, the embedded water tube 118 is too thin, which will cause the pressure required for water circulation to be too high.

[0074] like Fig.15 The third implementation structure of the water-cooling pipe 11 is that the outer pipe assembly 111 is an integrated stainless steel outer pipe, the outer pipe and the inner pipe 112 are both 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) Fig.16 and Fig.17 The first type is that the inner tube 112 is a round straight tube, the inner tube 112 is offset from the center of the outer tube assembly 111, and the embedded water pipe 118 is arranged between the inner tube 112 and the outer tube assembly 111; (2) Fig.18 and Fig.19 The second type is that the inner tube 112 is a curved tube. The inner tube 112 specifically includes a straight rear section, an inclined middle section and a straight front section that are connected to each other. The straight rear section deviates from the center of the outer tube assembly 111, and the straight front section is located at the center of the outer tube assembly 111. The inclined middle section connects the straight rear section and the straight front section, and the inclined middle section guides forward from the point deviating from the center of the outer tube to the center of the outer tube assembly 111. The depth of the embedded water pipe 118 extending into the outer tube assembly 111 is less than the length of the straight rear section, so the embedded water pipe 118 will not touch the inclined middle section and will not interfere with the inclined direction of the inclined middle section. The RF electrode 2 itself can be bent through the inner tube 112, that is, bend through the straight rear section, the inclined middle section and the straight front section, and finally extend out of the straight front section, so that the highest temperature of the external bioablation area can be measured.

[0075] like Fig. 20 and Fig.21For the third embodiment in which the inner tube 112 deviates from the center of the outer tube, the cross section of the embedded water tube 118 is circular, and the diameter of the embedded water tube 118 can be set relatively large. For example, the internal cross-sectional area of ​​the embedded water tube 118 is 0.202 mm 2 This design increases water flow and reduces the requirements for water inlet pump pressure.

[0076] In the water-cooled electrode kits of the above three implementation structures, the outer tube wraps the front end edge of the inner tube 112, and the front port of the inner tube 112 is open, so that the radio frequency electrode 2 can extend out of the inner tube 112 and the outer tube after being inserted into the inner tube 112, and the highest temperature of the ablation area can be monitored, so as to facilitate the regulation of the heating power to smoothly complete the ablation operation of abnormal biological tissue. In order to reduce trauma to the human body, the present application can design the cross-section of the water-cooled electrode to be smaller, and a situation can be set in which the inner tube deviates from the center of the outer tube assembly, and the cross-section of the embedded water pipe can be set to be circular, so that the electrode kit has a balanced and larger water inlet channel and water outlet channel, reducing the inlet and outlet water pressure and increasing the cooling water flow rate. Another situation is to set the inner tube in the center of the outer tube assembly, and set a water inlet channel with a non-circular cross-section, such as an elliptical, semi-circular ring, etc., to increase the water inlet area, reduce the inlet and outlet water pressure, and increase the cooling water circulation flow.

[0077] Although the present application has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in 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).

2. The internal circulation water-cooled electrode kit with adjustable temperature sensor position according to claim 1, characterized in that: The radio frequency electrode (2) is threadedly connected to the inner tube (112).

3. 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.

4. The internal circulation water-cooled electrode kit with adjustable temperature sensor position according to claim 1, characterized in that: 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).

5. The internal circulation water-cooled electrode kit with adjustable temperature sensor position according to claim 4, 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).

6. The internal circulation water-cooled electrode kit with adjustable temperature sensor position according to claim 1, characterized in that: The outer tube assembly (111) is an integrated tube; the inner tube (112) is located at the center of the outer tube assembly (111); the water-cooling conduit (11) further comprises an embedded water pipe (118); the embedded water pipe (118) is arranged between the inner tube (112) and the outer tube assembly (111); the front end of each embedded water pipe (118) is not connected to the front end of the outer tube assembly (111); the inner cavity of the embedded water pipe (118) is the water inlet channel (113); the space between the embedded water pipe (118) and the outer tube assembly (111) is the water outlet channel (114); and the cross-section of the embedded water pipe (118) is an elliptical or semicircular ring.

7. The internal circulation water-cooled electrode kit with adjustable temperature sensor position according to claim 1, characterized in that: The outer tube assembly (111) is an integrated tube; the inner tube (112) is a straight round tube and is offset from the center of the outer tube assembly (111) as a whole; the water-cooling conduit (11) further comprises an embedded water pipe (118); the embedded water pipe (118) is fixed between the inner tube (112) and the outer tube assembly (111); the front end of the embedded water pipe (118) is not connected to the front end of the outer tube assembly (111); the inner cavity of the embedded water pipe (118) is the water inlet channel (113); and the space between the embedded water pipe (118) and the outer tube assembly (111) is the water outlet channel (114).

8. The internal circulation water-cooled electrode kit with adjustable temperature sensor position according to claim 1, characterized in that: The outer tube assembly (111) is an integrated tube; the inner tube (112) is a round tube; the rear section of the inner tube (112) is a straight tube and deviates from the center of the outer tube assembly (111); the front section of the inner tube (112) is obliquely connected to the front center of the outer tube assembly (111); the water-cooling conduit (11) further comprises an embedded water pipe (118); the embedded water pipe (118) is fixed between the rear section of the inner tube (112) and the outer tube assembly (111); the embedded water pipe (118), the rear section of the inner tube (112) and the outer tube assembly (111) are parallel to each other; the inner cavity of the embedded water pipe (118) is the water inlet channel (113); and the space between the embedded water pipe (118) and the outer tube assembly (111) is the water outlet channel (114).

9. The internal circulation water-cooled electrode kit with adjustable temperature sensor position according to claim 7 or 8, characterized in that: The embedded water pipe (118) is a straight circular pipe.

10. 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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