CN113693714B - Water-cooling internal circulation type bipolar ablation needle for electroporation and focus ablation device - Google Patents
Water-cooling internal circulation type bipolar ablation needle for electroporation and focus ablation device Download PDFInfo
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- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
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Abstract
The application discloses a water-cooling internal circulation type bipolar ablation needle for electroporation, which comprises a front electrode tube, a front insulating tube, a rear electrode tube and an outer insulating tube; the front insulating tube is sleeved on the front electrode tube, the first end of the front electrode tube extends out of the front insulating tube and forms a needle head part, and the second end of the front electrode tube is connected with a first cable; the rear electrode tube is sleeved on the front insulating tube, the outer insulating tube is sleeved on the rear electrode tube, the first end of the rear electrode tube extends out of the outer insulating tube, and a discharge distance is reserved between the first end of the rear electrode tube and the part of the front electrode tube extending out of the front insulating tube; the second end of the rear electrode tube is connected with a second cable. This application has realized reducing the cloth needle quantity of electroporation ablation needle, has simplified the technological effect of cloth needle operation, when having solved and adopting electroporation to melt among the correlation technique, owing to need arrange many ablation needles, to in intensive vascular pathological change position or the narrow space, often there is the cloth needle difficulty to also there is the lower problem of cooling efficiency to electroporation ablation needle.
Description
Technical Field
The application relates to the technical field of medical equipment, in particular to a water-cooling internal circulation type bipolar ablation needle for electroporation and a focus ablation device.
Background
Tumor ablation therapy generally refers to a local interventional therapy technique for directly destroying tumors by various physical methods. The treatment modes comprise radio frequency, microwave, freezing, high-frequency electrocautery, laser, high-energy focused ultrasound, medicine and the like. The corresponding therapeutic equipment is called tumor/focus ablation system, and the equipment has an ablation needle which can be penetrated into the human body, when the therapy is carried out, the ablation needle needs to be penetrated into the human body accurately and reach the tumor or focus, and then the head end realizes the ablation by the therapy mode.
Electroporation ablation is a mode of tumor ablation therapy, which often requires multiple paired ablation needles that penetrate the tumor simultaneously and electroporate the tumor by discharging between the two needles. Due to the arrangement of a plurality of ablation needles, the problem of difficult needle arrangement often exists for the lesion position of dense blood vessels or in narrow space.
Aiming at the problems that when the electroporation ablation is adopted in the related art, due to the fact that a plurality of ablation needles need to be arranged, needle arrangement is often difficult in the lesion position or narrow space of a dense blood vessel, and the cooling efficiency of the electroporation ablation needles is low, an effective solution is not provided at present.
Disclosure of Invention
The main objective of the present application is to provide a water-cooling internal circulation type bipolar ablation needle for electroporation and a lesion ablation device, so as to solve the problems that when electroporation ablation is adopted in the related art, due to the need of arranging a plurality of ablation needles, the needle distribution is difficult in the lesion position of the dense blood vessel or the narrow space, and the cooling efficiency of the electroporation ablation needle is low.
In order to achieve the above object, the present application provides a water-cooled internal circulation type bipolar ablation needle for electroporation, including: the electrode comprises a front electrode tube, a front insulating tube, a rear electrode tube and an outer insulating tube; wherein the content of the first and second substances,
the front insulating tube is sleeved on the front electrode tube, the first end of the front electrode tube extends out of the front insulating tube to form a needle head part, and the second end of the front electrode tube is connected with a first cable;
the rear electrode tube is sleeved on the front insulating tube, the outer insulating tube is sleeved on the rear electrode tube, the first end of the rear electrode tube extends out of the outer insulating tube, and a discharge distance is reserved between the first end of the rear electrode tube and the part of the front electrode tube extending out of the front insulating tube; the second end of the rear electrode tube is connected with a second cable;
the first cable and the second cable are used for being connected with different polarity ends of a power supply; the water-cooled tube is sleeved in the front electrode tube;
the first end of the water-cooling pipe extends to the needle head part and is provided with a water outlet hole; the second end of the water-cooled tube extends out of the front electrode tube and is connected with the water inlet tube;
a gap is formed between the outer circle of the water-cooling pipe and the inner circle of the front electrode pipe to form a backwater flow channel; the first end of the return water flow channel is communicated with the water outlet hole, and the second end of the return water flow channel is connected with the water outlet pipe.
Furthermore, the needle head part of the front electrode tube is provided with an injection hole, the injection hole is communicated with the return water flow passage, and the injection hole is filled with temperature-sensitive food wax or pressure-sensitive food wax, so that the return water flow passage and the outer part of the needle head part are in a sealed and isolated state under a normal state.
Furthermore, a plurality of filling holes are arranged and distributed along the circumferential direction of the needle head part, and the temperature-sensitive food wax or the pressure-sensitive food wax is filled in each filling hole.
Further, the front electrode tube comprises a first large-diameter section, a first medium-diameter section and a first small-diameter section which are sequentially formed along the transverse direction and gradually reduced in diameter;
the front insulating tube comprises a second middle-diameter section and a second small-diameter section which are sequentially formed along the transverse direction and gradually reduced in diameter, the second middle-diameter section is sleeved on the first middle-diameter section, and the second small-diameter section is sleeved on the first small-diameter section;
the outer surface of the second middle-diameter section is flush with the outer surface of the first large-diameter section;
the back electrode pipe sleeve is established on the second path section, just the surface of back electrode pipe with the surface parallel and level of second path section.
Furthermore, an adhesive layer is arranged between the outer circle of the rear electrode tube and the inner circle of the front insulating tube.
Furthermore, the bonding layer is formed by filling glue between the outer circle of the rear electrode tube and the inner circle of the front insulating tube.
Furthermore, the second end of the front electrode tube extends out of the front insulating tube and then is connected with the first cable;
and the second end of the rear electrode tube extends out of the outer insulating tube and then is connected with the second cable.
Further, the length of the second end of the front electrode tube extending out of the front insulating tube is more than or equal to 0.5 mm; the length of the second end of the rear electrode tube extending out of the outer insulating tube is more than or equal to 0.5 mm.
The water-cooled tube, the front electrode tube, the rear electrode tube, the front insulating tube and one end of the outer insulating tube, which is far away from the needle head part, extend into the handle and are fixed in the handle.
The water cooling device is characterized by further comprising a three-way pipe, the three-way pipe is arranged in the handle, the end part of the water cooling pipe is sleeved in the three-way pipe and extends to a second end along the first end of the three-way pipe, and the water inlet pipe is fixed at the second end of the three-way pipe;
the end part of the front electrode pipe is sleeved in the three-way pipe, the second end of the return water flow passage is communicated with the third end of the three-way pipe, and the water outlet pipe is fixed at the third end of the three-way pipe.
Furthermore, the handle is provided with a mounting hole, and the water inlet pipe, the water outlet pipe, the second cable and the first cable all penetrate through the mounting hole and extend to the outside of the handle.
According to another aspect of the present application, there is provided a lesion ablation apparatus including the above-described water-cooled internal circulation type bipolar ablation needle for electroporation.
In the embodiment of the application, a front electrode tube, a front insulating tube, a rear electrode tube and an outer insulating tube are arranged; the front insulating tube is sleeved on the front electrode tube, the first end of the front electrode tube extends out of the front insulating tube to form a needle head part, and the second end of the front electrode tube is connected with a first cable; the rear electrode tube is sleeved on the front insulating tube, the outer insulating tube is sleeved on the rear electrode tube, the first end of the rear electrode tube extends out of the outer insulating tube, and a discharge distance is reserved between the first end of the rear electrode tube and the part of the front electrode tube extending out of the front insulating tube; the second end of the rear electrode tube is connected with a second cable, and the first cable and the second cable are used for being connected with different polarity ends of a power supply; the water cooling tube is sleeved in the front electrode tube; the first end of the water-cooling pipe extends to the needle head part and is provided with a water outlet hole; the second end of the water-cooled tube extends out of the front electrode tube and is connected with the water inlet tube;
a gap is formed between the outer circle of the water-cooling pipe and the inner circle of the front electrode pipe to form a backwater flow passage; the first end of the backwater flow passage is communicated with the water outlet hole, the second end is connected with the water outlet pipe, so that a front electrode pipe and a rear electrode pipe are arranged on one ablation needle, the front electrode tube and the rear electrode tube are respectively connected with the first cable and the second cable, so that the electroporation therapy can be carried out by adopting one ablation needle, and the purpose of circular cooling is realized by the cooperation of the water cooling pipe and the return water flow passage, thereby realizing the purposes of reducing the needle distribution quantity of the electroporation ablation needle and simplifying the needle distribution operation, the needle distribution is easier for the lesion position of the dense blood vessel or the narrow space, the technical effect of improving the cooling efficiency is achieved, thereby solving the problems that when the electroporation ablation is adopted in the related technology, as a plurality of ablation needles are required to be arranged, for a lesion site of a dense blood vessel or in a narrow space, there are often difficulties in needle arrangement, and there is also a problem of low cooling efficiency for an electroporation ablation needle.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a schematic structural diagram according to an embodiment of the present application;
FIG. 2 is an enlarged schematic view of a portion Y of FIG. 1;
FIG. 3 is an enlarged schematic view of a portion X of FIG. 1;
figure 4 is a schematic view of the structure of a tip segment according to an embodiment of the present application;
FIG. 5 is a schematic structural view of a front electrode tube according to an embodiment of the present application;
the device comprises a needle head part 1, a filling hole 1a, a front electrode tube 1b, a front insulating tube 2, a rear electrode tube 3, an outer insulating tube 4, a handle 5, a water inlet tube 6, a water outlet tube 7, a second cable 8, a first cable 9, a water cooling tube 10, a three-way tube 11, a rear electrode tube extension section 12, a front electrode tube extension section 13, a bonding layer 14, a first large-diameter section 15, a first middle-diameter section 16, a first small-diameter section 17, a second middle-diameter section 18, a second small-diameter section 19 and a return water channel 20.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used.
In this application, the terms "upper", "lower", "inside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "disposed," "provided," "connected," "secured," and the like are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Tumor ablation therapy generally refers to a local interventional therapy technique for directly destroying tumors by various physical methods. The treatment modes comprise radio frequency, microwave, freezing, high-frequency electrocautery, laser, high-energy focused ultrasound, medicine and the like. The corresponding therapeutic equipment is called tumor/focus ablation system, and the equipment has an ablation needle which can be penetrated into the human body, when the therapy is carried out, the ablation needle needs to be penetrated into the human body accurately and reach the tumor or focus, and then the head end realizes the ablation by the therapy mode.
Electroporation ablation is a mode of tumor ablation therapy, which often requires multiple paired ablation needles that penetrate the tumor simultaneously and electroporate the tumor by discharging between the two needles. Due to the arrangement of a plurality of ablation needles, the problem of difficult needle arrangement often exists for the lesion position of dense blood vessels or in narrow space.
To solve the above problems, as shown in fig. 1 to 5, an embodiment of the present application provides a water-cooled internal circulation type bipolar ablation needle for electroporation, including: the electrode tube comprises a front electrode tube 1b, a front insulating tube 2, a rear electrode tube 3 and an outer insulating tube 4; wherein the content of the first and second substances,
the front insulating tube 2 is sleeved on the front electrode tube 1b, the first end of the front electrode tube 1b extends out of the front insulating tube 2 to form a needle head part 1, and the second end of the front electrode tube 1b is connected with a first cable 9;
the rear electrode tube 3 is sleeved on the front insulating tube 2, the outer insulating tube 4 is sleeved on the rear electrode tube 3, and the first end of the rear electrode tube 3 extends out of the outer insulating tube 4 and has a discharge distance with the part of the front electrode tube 1b extending out of the front insulating tube 2; the second end of the rear electrode tube 3 is connected with a second cable 8.
In this embodiment, the water-cooled internal circulation type bipolar ablation needle for electroporation is mainly composed of four parts, namely a front electrode tube 1b, a front insulating tube 2, a rear electrode tube 3 and an outer insulating tube 4, wherein the four parts are sequentially sleeved, that is, the front electrode tube 1b is used as a central part, the front insulating tube 2 is sleeved on the front electrode tube 1b, the rear electrode tube 3 is sleeved on the front insulating tube 2, so that the rear electrode tube 3 and the front electrode tube 1b are arranged in an insulating manner, and the outer insulating tube 4 is sleeved on the rear electrode tube 3. The front insulating tube 2 is tightly wrapped on the front electrode tube 1b and made of an insulating material, preferably PET, PEFE or FEP. The front electrode tube 1b and the rear electrode tube 3 are made of metal materials, and the preferred material is 304 stainless steel. The rear electrode tube 3 is fixedly connected with the front insulation without relative displacement. The outer insulating tube 4 is coated on the rear electrode tube 3, and no gap is formed between the outer insulating tube and the rear electrode tube, so that the outer insulating tube and the rear electrode tube are in close fit.
Since the electric discharge between two electrodes is needed in the electroporation ablation treatment, the tumor is treated by electroporation. Therefore, the front electrode tube 1b and the rear electrode tube 3 as the electrode structure of the ablation needle cannot be completely sleeved in the corresponding front insulating tube 2 and the outer insulating tube 4. Therefore, in this embodiment, the first end of the front electrode tube 1b extends out of the front insulating tube 2, so that the needle head 1, which serves as one of the discharge ends and also serves as an ablation needle, is inserted into the lesion site. The second end of the front electrode tube 1b can be directly connected with the first cable 9, and the current is input to the front electrode tube 1b through the first cable 9. Similarly, the first end of the rear electrode tube 3 extends out of the outer insulating tube 4, so that the first end of the rear electrode tube 3 is used as another discharge end and simultaneously punctures into a focus position along with the needle head part 1, the second end of the rear electrode tube 3 can be directly connected with the second cable 8, and current is input into the rear electrode tube 3 through the second cable 8. Since the first cable 9 and the second cable 8 are connected to different polarity ends of the power supply, for example, the first cable 9 is connected to the negative electrode of the power supply, the second cable 8 is connected to the positive electrode of the power supply, and negative current and positive current are respectively input to the front electrode tube 1b and the rear electrode tube 3 through the first cable 9 and the second cable 8. Of course, the first cable 9 may be connected to the positive pole of the power supply and the second cable 8 may be connected to the negative pole of the power supply.
In order to allow discharge between the front electrode tube 1b and the first end of the rear electrode tube 3, the first end of the front electrode tube 1b and the first end of the rear electrode tube 3 cannot be in direct contact with each other. In this embodiment, a certain discharge distance is maintained between the first end of the rear electrode tube 3 and the first end of the front electrode tube 1b, and when a current flows in the front electrode tube 1b and the rear electrode tube 3, the current is discharged in the discharge distance, thereby performing electroporation treatment on the lesion site.
Compared with the electroporation ablation needle in the related art, the water-cooling internal circulation type bipolar ablation needle for electroporation in the embodiment has the advantages that the front electrode tube 1b and the rear electrode tube 3 are arranged on one ablation needle, the front electrode tube 1b and the rear electrode tube 3 are respectively connected with the first cable 9 and the second cable 8, so that electroporation treatment can be carried out by adopting one ablation needle, the needle arrangement quantity of the electroporation ablation needle is reduced, needle arrangement operation is simplified, the needle arrangement is easier for lesion positions or narrow spaces of dense blood vessels, and the problem that the needle arrangement is difficult due to the fact that a plurality of ablation needles need to be arranged when electroporation ablation is adopted in the related art is solved.
Since the front electrode tube 1b and the rear electrode tube 3 are conductors, the temperature will rise after inputting current for a long time, and in order to keep the ablation needle at a proper temperature, the front electrode tube 1b and the rear electrode tube 3 need to be cooled. Therefore, the ablation needle in this embodiment is as shown in fig. 1 to 3, and further includes a water-cooling tube 10, a water inlet tube 6 and a water outlet tube 7, wherein the water-cooling tube 10 is sleeved in the front electrode tube 1 b;
the first end of the water-cooling tube 10 extends to the needle head part 1 and is provided with a water outlet; the second end of the water-cooled tube 10 extends out of the front electrode tube 1b and is connected with the water inlet tube 6;
a gap is formed between the outer circle of the water-cooling pipe 10 and the inner circle of the front electrode pipe 1b to form a backwater flow passage 20; the first end of the return water flow channel 20 is communicated with the water outlet hole, and the second end is connected with the water outlet pipe 7.
Specifically, the water-cooling tube 10 is sleeved in the front electrode tube 1b as the central portion of the ablation needle, and after the second end of the water-cooling tube 10 extends out of the front electrode tube 1b and is connected with the water inlet tube 6, cooling water can be input into the water-cooling tube 10 through the water inlet tube 6, and the cooling water flows along the length direction of the water-cooling tube 10. In order to fully cool the front electrode tube 1b by the water-cooled tube 10, the first end of the water-cooled tube 10 extends to the needle head portion 1 of the front electrode tube 1b, i.e. the cooling water can flow to the needle head portion 1 of the front electrode tube 1b in the water-cooled tube 10.
In order to make the cooling water directly contact with the inner wall of the front electrode tube 1b, thereby improving the cooling efficiency. In the embodiment, the first end of the water-cooling tube 10 is provided with a water outlet, the position of the water outlet corresponds to the needle head part 1, a certain gap is formed between the outer circle of the water-cooling tube 10 and the inner circle of the front electrode tube 1b, a water return flow channel 20 is formed by the gap, and the water return flow channel 20 is also communicated with the water outlet. Therefore, when the cooling water enters the water cooling tube 10 and flows to the needle head part 1 of the front electrode tube 1b, the cooling water can flow into the backwater flow channel 20 through the water outlet hole, and the cooling water can directly contact with the inner wall of the front electrode tube 1b, so that the cooling efficiency of the front electrode tube 1b is improved. The cooling water entering the backwater flow passage 20 reversely flows from the needle head part 1 of the front electrode tube 1b to the other end of the front electrode tube 1b, so that the cooling water can be in full contact with the inner circle of the front electrode tube 1b, the contact area between the cooling water and the front electrode tube 1b is increased, and the cooling efficiency is further improved.
In order to realize the circulation flow of the cooling water, the cooling water can flow out through the water outlet pipe 7 positioned at the end part of the front electrode pipe 1b after flowing into the water return flow channel 20, and the circulation flow of the cooling water can be realized between the water outlet pipe 7 and the water inlet pipe 6 through the water circulation equipment.
When the temperatures of the front electrode tube 1b and the rear electrode tube 3 exceed a set value and the cooling water in the water-cooling tube 10 cannot reduce the temperatures to a use value, the cooling effect on the front electrode tube 1b and the rear electrode tube 3 needs to be further enhanced. Therefore, in this embodiment, as shown in fig. 4, an infusion hole 1a is formed in the needle head portion 1 of the front electrode tube 1b, the infusion hole 1a is communicated with the return water flow passage 20, and the infusion hole 1a is filled with temperature-sensitive food wax or pressure-sensitive food wax, so that the return water flow passage 20 and the outside of the needle head portion 1 are in a sealed and isolated state in a normal state.
When the temperature of the ablation needle exceeds a set value, the temperature-sensitive food wax filled in the pouring hole 1a is melted, so that the water return flow channel 20 and the outside of the needle head part 1 are changed into a communicated state from a sealed and isolated state, at the moment, cooling water in the water return flow channel 20 can flow out of the ablation needle through the pouring hole 1a, the temperature of the ablation tissue and the outside of the ablation needle is reduced, the temperature is prevented from being continuously increased, protein denaturation is caused, and important tissue organs and important blood vessels around the needle tube are influenced by high temperature, so that necrosis is caused.
When the temperature is lower than the set value, the temperature-sensitive food wax is solid and seals the pouring hole 1a, so that cooling water circularly flows in the ablation needle, and the ablation needle can be changed into the pouring type ablation needle from the internal circulation ablation needle through the matching of the pouring hole 1a and the temperature-sensitive food wax.
Similarly, the food wax may not be limited to the temperature-sensitive food wax, but may also be a pressure-sensitive food wax, and the difference between the two is only that the trigger condition is different, and of course, other media having the same function as the food wax may be adopted to seal the filling hole 1a, or the food wax with other trigger conditions may be adopted to seal the filling hole 1 a.
In order to facilitate cooling of lesion tissues around the ablation needle, the plurality of perfusion holes 1a are arranged and distributed along the circumferential direction of the needle head part 1, and temperature-sensitive food wax or pressure-sensitive food wax is filled in each perfusion hole 1 a.
Because the setting is established to the ablation needle by preceding electrode tube 1b, preceding insulating tube 2, back electrode tube 3 and outer insulating tube 4 cover in proper order in this application, and preceding electrode tube 1b and back electrode tube 3 all need extend one section, consequently for making the ablation needle puncture into the surperficial level and smooth of focus part, this embodiment carries out further improvement, specifically as follows to preceding electrode tube 1b, preceding insulating tube 2 and back electrode tube 3:
as shown in fig. 5, the front electrode tube 1b includes a first large diameter section 15, a first medium diameter section 16 and a first small diameter section 17 which are sequentially formed in the transverse direction and have gradually decreasing diameters;
as shown in fig. 2, the front insulating tube 2 includes a second intermediate diameter section 18 and a second small diameter section 19 which are formed in sequence along the transverse direction and gradually decrease in diameter, the second intermediate diameter section 18 is sleeved on the first intermediate diameter section 16, and the second small diameter section 19 is sleeved on the first small diameter section 17;
the outer surface of the second intermediate diameter section 18 is flush with the outer surface of the first large diameter section 15;
the rear electrode tube 3 is sleeved on the second small-diameter section 19, and the outer surface of the rear electrode tube 3 is flush with the outer surface of the second middle-diameter section 18.
Specifically, in the present embodiment, the diameter of the lesion penetration portion of the ablation needle is set with reference to the first large diameter section 15 of the front electrode tube 1b, and the portion of the front insulating tube 2 that leaks and the portion of the rear electrode tube 3 that leaks need to be flush with the surface of the first large diameter section 15. Since the front electrode tube 1b includes the first large diameter section 15, the first medium diameter section 16, and the first small diameter section 17, which are sequentially formed in the transverse direction and have gradually decreasing diameters, there are two step surfaces at the first end of the front electrode tube 1 b. And the front insulating tube 2 includes a second middle diameter section 18 and a second small diameter section 19 which are sequentially formed in a transverse direction and have gradually reduced diameters, so that they have a stepped surface.
The inner diameter of the second intermediate diameter section 18 of the front insulating tube 2 matches the outer diameter of the first intermediate diameter section 16 of the front electrode tube 1b, and the outer diameter of the second intermediate diameter section 18 matches the outer diameter of the first large diameter section 15, so that the outer surface of the second intermediate diameter section 18 is flush with the outer surface of the first large diameter section 15 when the second intermediate diameter section 18 is fitted over the first intermediate diameter section 16. Set up back electrode tube 3 with the same reason, the external diameter of the second footpath section 19 of the internal diameter of back electrode tube 3 and preceding insulating tube 2 matches promptly, and the external diameter of back electrode tube 3 then matches with the external diameter of the second footpath section 18 of preceding insulating tube 2, and when the second footpath section 19 of insulating tube 2 was established in the front to the external diameter of back electrode tube 3 cover, the surface of back electrode tube 3 can be with the surface parallel and level of the second footpath section 18 of preceding insulating tube 2, the surface parallel and level of the first footpath section 15 with preceding electrode tube 1b promptly.
The front end part of the ablation needle has a consistent outer diameter through the arrangement mode, the plane of the front end part is flush, a doctor can conveniently puncture the needle, and the puncture blocking force during the puncture of the needle is reduced.
In order to make the connection between the outer circle of the rear electrode tube 3 and the inner circle of the front insulating tube 2 more tight, as shown in fig. 2, an adhesive layer 14 is provided between the outer circle of the rear electrode tube 3 and the inner circle of the front insulating tube 2. The bonding layer 14 is formed by filling glue between the outer circle of the rear electrode tube 3 and the inner circle of the front insulating tube 2.
As shown in FIG. 3, in order to facilitate the connection of the second end of the front electrode tube 1b with the first cable 9, the second end of the front electrode tube 1b may extend a length beyond the front insulating tube 2 to form an extension 13 of the front electrode tube 1 b. Namely, the second end of the front electrode tube 1b extends out of the front insulating tube 2 and then is connected with the first cable 9;
similarly, in order to facilitate the connection between the second end of the rear electrode tube 3 and the second cable 8, the second end of the rear electrode tube 3 may also extend out of the outer insulating tube 4 by a length to form an extension section of the rear electrode tube 3. Namely, the second end of the rear electrode tube 3 extends out of the outer insulating tube 4 and is connected with the second cable 8.
In order to facilitate the first cable 9 and the second cable 8 to be respectively welded and fixed on the front electrode tube 1b and the rear electrode tube 3, the length of the second end of the front electrode tube 1b extending out of the front insulating tube 2 is more than or equal to 0.5 mm; the second end of the rear electrode tube 3 extends out of the outer insulating tube 4 by a length of more than or equal to 0.5 mm.
As shown in figure 1, in order to facilitate the operation of the puncture needle by a doctor, the ablation needle further comprises a handle 5, the inside of the handle 5 is hollow, a circular hole is formed in the side wall of one side of the handle 5, and one ends, far away from the needle head part 1, of the water cooling tube 10, the front electrode tube 1b, the rear electrode tube 3, the front insulating tube 2 and the outer insulating tube 4 all penetrate through the circular hole and then extend into the handle 5 and are fixed in the handle 5. Wherein, the external insulation tube 4 is used as the outermost side structure of the needle body part of the ablation needle, so that the external insulation tube is directly contacted and fixed with the circular hole on the side wall of the handle 5, and the water cooling tube 10, the front electrode tube 1b, the rear electrode tube 3 and the front insulation tube 2 are indirectly fixed on the handle 5.
In order to facilitate the circulating flow of cooling water in the water cooling pipe 10 and the return water flow passage 20, the ablation needle further comprises a three-way pipe 11, the three-way pipe 11 is arranged in the handle 5, the end part of the water cooling pipe 10 is sleeved in the three-way pipe 11 and extends to the second end along the first end of the three-way pipe 11, and the water inlet pipe 6 is fixed at the second end of the three-way pipe 11;
the end part of the front electrode tube 1b is sleeved in the three-way tube 11, the second end of the return water flow passage 20 is communicated with the third end of the three-way tube 11, and the water outlet tube 7 is fixed at the third end of the three-way tube 11.
Specifically, it should be noted that the three-way pipe 11 includes a transverse channel and an oblique channel connected to the transverse channel in an oblique manner, two ends of the transverse channel are open and form a first end and a second end of the three-way pipe 11, one end of the oblique channel is connected to the middle of the transverse channel, and the other end of the oblique channel forms a third end of the three-way pipe 11. The installation of the water-cooled tubes 10 and the front electrode tubes 1b is facilitated by the horizontally arranged lateral passages. The water cooling pipe 10 is used as an inlet channel of cooling water, and is required to extend from the first end to the second end of the three-way pipe 11 and then be connected with the water inlet pipe 6. The front electrode tube 1b is used for matching with the water-cooled tube 10 to form a water return flow channel 20, so that the front electrode tube 1b can extend to the joint of the inclined channel and the transverse channel from the first end of the three-way tube 11, a water return hole is formed in the joint, the water return hole is communicated with the inclined channel of the three-way tube 11, and the inclined channel is used as the third end of the three-way tube 11 and is connected with the water outlet tube 7.
Through the above-mentioned structural arrangement of three-way pipe 11 for cooling water can be stable carries out circulation flow in melting the needle, and can be convenient for the erection joint of water-cooled tube 10 and front electrode pipe 1 b.
As shown in fig. 1, a mounting hole is formed in the handle 5, and the water inlet pipe 6, the water outlet pipe 7, the second cable 8 and the first cable 9 all penetrate through the mounting hole and extend to the outside of the handle 5.
According to another aspect of the present application, there is provided a lesion ablation apparatus including the above-described water-cooled internal circulation type bipolar ablation needle for electroporation.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A water-cooling internal circulation type bipolar ablation needle for electroporation is characterized by comprising: the electrode comprises a front electrode tube, a front insulating tube, a rear electrode tube and an outer insulating tube; the front insulating tube is sleeved on the front electrode tube, the first end of the front electrode tube extends out of the front insulating tube to form a needle head part, and the second end of the front electrode tube is connected with a first cable; the rear electrode tube is sleeved on the front insulating tube, the outer insulating tube is sleeved on the rear electrode tube, the first end of the rear electrode tube extends out of the outer insulating tube, and a discharge distance is reserved between the first end of the rear electrode tube and the part of the front electrode tube extending out of the front insulating tube; the second end of the rear electrode tube is connected with a second cable; the first cable and the second cable are used for being connected with different polarity ends of a power supply; the water-cooled tube is sleeved in the front electrode tube; the first end of the water-cooling pipe extends to the needle head part and is provided with a water outlet hole; the second end of the water-cooled tube extends out of the front electrode tube and is connected with the water inlet tube; a gap is formed between the outer circle of the water-cooling pipe and the inner circle of the front electrode pipe to form a backwater flow channel; the needle head part of the front electrode tube is provided with a filling hole, the filling hole is communicated with the return water channel, and the filling hole is filled with temperature-sensitive food wax or pressure-sensitive food wax so that the return water channel and the outside of the needle head part are in a sealed and isolated state under a normal state; the front electrode tube comprises a first large-diameter section, a first middle-diameter section and a first small-diameter section which are sequentially formed along the transverse direction and gradually reduced in diameter, so that the first end of the front electrode tube is provided with two step surfaces; the front insulating tube comprises a second middle-diameter section and a second small-diameter section which are sequentially formed along the transverse direction and gradually reduced in diameter, so that the first end of the front insulating tube is provided with a step surface, the second middle-diameter section is sleeved on the first middle-diameter section, and the second small-diameter section is sleeved on the first small-diameter section; the outer surface of the second middle-diameter section is flush with the outer surface of the first large-diameter section; the rear electrode tube is sleeved on the second small-diameter section, and the outer surface of the rear electrode tube is flush with the outer surface of the second middle-diameter section; the water-cooling internal circulation type bipolar ablation needle for electroporation further comprises a three-way pipe, the end part of the water-cooling pipe is sleeved in the three-way pipe and extends to the second end along the first end of the three-way pipe, and the water inlet pipe is fixed at the second end of the three-way pipe; the end part of the front electrode pipe is sleeved in the three-way pipe, the second end of the return water flow passage is communicated with the third end of the three-way pipe, and the water outlet pipe is fixed at the third end of the three-way pipe; the three-way pipe comprises a transverse channel and an oblique channel obliquely connected to the transverse channel, two ends of the transverse channel are of opening structures and form a first end and a second end of the three-way pipe, one end of the oblique channel is connected with the middle part of the transverse channel, and the other end of the oblique channel forms a third end of the three-way pipe; the water cooling pipe is used as an inlet channel of cooling water, extends from the first end to the second end of the three-way pipe and is then connected with the water inlet pipe; the front electrode tube is used for being matched with the water cooling tube to form a water return flow channel, the front electrode tube extends to the joint of the inclined channel and the transverse channel from the first end of the three-way tube, a water return hole is formed in the joint, the water return hole is communicated with the inclined channel of the three-way tube, and the inclined channel serving as the third end of the three-way tube is connected with the water outlet tube.
2. The water-cooled internal circulation type bipolar ablation needle for electroporation as claimed in claim 1, wherein the plurality of perfusion holes are arranged and distributed along the circumferential direction of the needle head portion, and each perfusion hole is filled with the temperature-sensitive food wax or the pressure-sensitive food wax.
3. The water-cooled internal circulation type bipolar ablation needle for electroporation as claimed in claim 2, wherein an adhesive layer is provided between the outer circle of the rear electrode tube and the inner circle of the front insulating tube.
4. The water-cooled internal circulation type bipolar ablation needle for electroporation as claimed in claim 3, wherein the adhesive layer is formed by filling glue between the outer circle of the rear electrode tube and the inner circle of the front insulating tube.
5. The water-cooled internal circulation type bipolar ablation needle for electroporation as claimed in claim 4, wherein the second end of the front electrode tube extends out of the front insulating tube and is connected to the first cable;
and the second end of the rear electrode tube extends out of the outer insulating tube and then is connected with the second cable.
6. The water-cooled internal circulation type bipolar ablation needle for electroporation as claimed in any one of claims 1 to 5, wherein the second end of the front electrode tube extends out of the front insulation tube by a length of 0.5mm or more; the length of the second end of the rear electrode tube extending out of the outer insulating tube is more than or equal to 0.5 mm.
7. The water-cooled internal circulation type bipolar ablation needle for electroporation as claimed in any one of claims 2 to 3, further comprising a handle, wherein the water-cooled tube, the front electrode tube, the rear electrode tube, the front insulating tube and the end of the outer insulating tube away from the needle head portion all extend into the handle and are fixed in the handle.
8. The water-cooled internal circulation type bipolar ablation needle for electroporation as claimed in claim 7, wherein the handle is provided with a mounting hole, and the water inlet pipe, the water outlet pipe, the second cable and the first cable all pass through the mounting hole and extend to the outside of the handle.
9. The water-cooled internal circulation type bipolar ablation needle for electroporation as claimed in claim 8, wherein a plurality of back electrode tube scale marks are provided on the outer circumference of the outer insulating tube along the axial direction thereof.
10. A lesion ablation device comprising the water-cooled internal circulation type bipolar ablation needle for electroporation according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111273045.2A CN113693714B (en) | 2021-10-29 | 2021-10-29 | Water-cooling internal circulation type bipolar ablation needle for electroporation and focus ablation device |
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| CN202111273045.2A CN113693714B (en) | 2021-10-29 | 2021-10-29 | Water-cooling internal circulation type bipolar ablation needle for electroporation and focus ablation device |
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| CN115399869A (en) * | 2022-11-02 | 2022-11-29 | 杭州维纳安可医疗科技有限责任公司 | Ablation needle, processing technology, ablation system and using method thereof |
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| KR100466866B1 (en) * | 2003-04-24 | 2005-01-24 | 전명기 | Electrode for radiofrequency tissue ablation |
| CN205163239U (en) * | 2015-10-22 | 2016-04-20 | 浙江伽奈维医疗科技有限公司 | Water -cooling ablation electrode |
| US20200000516A1 (en) * | 2016-06-21 | 2020-01-02 | Daniel Igor Branovan | Sterile disposable bipolar ablation needle, associated system, and method of use |
| TWI634868B (en) * | 2017-12-22 | 2018-09-11 | 財團法人工業技術研究院 | Bipolar electrode probe |
| CN108013931A (en) * | 2018-01-04 | 2018-05-11 | 成都美创医疗科技股份有限公司 | A kind of low temperature plasma procedures electrode |
| CN110269678A (en) * | 2019-07-18 | 2019-09-24 | 上海交通大学医学院附属第九人民医院 | A kind of decorative sursery Bipolar plasmakinetic procedures electrode |
| CN111643176A (en) * | 2020-04-14 | 2020-09-11 | 珠海市司迈科技有限公司 | Radio frequency ablation electrode for otitis media minimally invasive surgery and using method thereof |
| CN210600427U (en) * | 2020-04-18 | 2020-05-22 | 博奥生物集团有限公司 | Fluid-driven control valve |
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