A hot puncture stent placer

Abstract

The present application provides a kind of hot puncture stent implanters, stent implanters have proximal end and distal end, front handle distal end is equipped with outer tube, from proximal end to distal end extends, the outer diameter of outer tube distal end is less than or equal to 3.15mm, outer tube is equipped with insulated middle tube, from proximal end to distal end extends, insulated middle tube is equipped with electrically conductive part, from proximal end to distal end extends, electrically conductive part proximal end terminal can be connected with external power supply, outer tube proximal end and the insulated middle tube between being equipped with boost tube, boost tube distal end and the proximal end of the insulated middle tube are mutually connected, the distal end of electrically conductive part is equipped with insulation part, and insulation part is distributed with electrically conductive head, electrically conductive head is connected with electrically conductive part and realizes electrically conductive function, stent is compressed and located in the space between the distal end of electrically conductive part and outer tube, electrically conductive part plays the role of electrically conductive, simultaneously plays the role of stent support.Electrically conductive part is connected with outer tube proximal end, and front handle is withdrawn along boost tube, drives the outer tube to withdraw and release stent.

Description

[0001] This application is a divisional application. The original application has the application number 2018106065652 and the original application date is June 13, 2018. The entire contents of the original application are incorporated herein by reference. Technical Field

[0002] This invention relates to a thermal puncture implanter in the field of medical devices, and more particularly to a thermal puncture stent implanter that integrates cutting and injection functions. Background Technology

[0003] Gastrointestinal cholecystoanastomosis involves inserting a heated instrument through the stomach or duodenum wall into the gallbladder under endoscopy. The distal end of a fully covered double-mushroom-head stent is placed in the gallbladder, while the proximal end is placed in the stomach or duodenum, creating a new pathway between the digestive tract and gallbladder. Gallstones are then removed using a stone retrieval basket via endoscopy and the newly constructed pathway, achieving endoscopic gallbladder-preserving stone removal. This provides a novel treatment option for patients with gallbladder disease who are unsuitable for surgery, and also offers a gallbladder-preserving treatment method for patients with good gallbladder function, improving their long-term quality of life. Gastropancreatic pseudocyst stent anastomosis involves inserting a large-diameter fully covered double-mushroom-head stent into the pancreatic pseudocyst via gastric puncture under endoscopy. This achieves anastomosis between the stomach and the pancreatic pseudocyst, allowing for adequate drainage of fluid and necrotic material from the pseudocyst.

[0004] Duodenobiliary anastomosis, traditionally performed by ERCP, involves inserting a guidewire and other instruments retrogradely through the duodenum into the duodenal papilla to reach the common bile duct for stone removal and biopsy. For patients where guidewire insertion is difficult, percutaneous puncture or surgical intervention is usually required, which may reduce the patient's quality of life or cause greater trauma.

[0005] Gastrointestinal anastomosis is a procedure performed when a tumor invades the stomach, obstructing the passage of food into the intestines. Patients experiencing persistent vomiting previously either underwent open surgery to create a new gastrointestinal pathway or relied solely on intravenous nutrition. For older patients or those whose physical condition was no longer suitable for open surgery, the quality of life was extremely low, placing a heavy burden on their families. Gastrointestinal anastomosis involves endoscopically inserting a large-diameter, fully covered, double-mushroom-head stent into the proximal small intestine through a gastric puncture. This creates a new pathway between the stomach and small intestine, resolving the impact of duodenal obstruction on the patient's quality of life.

[0006] Previously, such "bypass" procedures required open surgery under general anesthesia, resulting in significant trauma. Endoscopic minimally invasive surgery, however, is less invasive, shorter in operation time, less painful, and allows for faster recovery, fully demonstrating the advantages of endoscopic minimally invasive techniques. In recent years, with the continuous development and upgrading of endoscopic technology and various instruments and accessories, endoscopy has played an increasingly important role in the diagnosis and treatment of various digestive system diseases. In particular, the continuous innovation of endoscopic minimally invasive treatments has provided new minimally invasive treatment methods for many patients with gastrointestinal and biliary pancreatic diseases who cannot or do not wish to undergo surgery. Currently, in the four traditional surgeries mentioned above, the stent is typically a double-mushroom-head metal stent with a diameter of φ10~φ16mm, and the matching heated implanter has an outer diameter of φ3.5mm~φ3.6mm (10.5Fr~10.8Fr). The traditional endoscopic ultrasound channel is φ3.7mm. Due to the small gap, the traditional electrically charged implanter moves very slowly within the endoscopic channel, which is the main reason why these surgeries are difficult to perform. Meanwhile, the outer diameter of the endoscopic ultrasound is φ14mm, which is 4mm larger than the outer diameter of the traditional gastroscope φ10mm, making it more inconvenient to operate and able to reach relatively fewer areas.

[0007] Therefore, in order to perform gastrobiliary anastomosis, gastrointestinal anastomosis, and Natural Orifice Transluminal Endoscopic Surgery (NOTES) via gastroscopy, it is necessary to design smaller, electrically conductive implants and simplify the stent release procedure through the gastroscopy channel to enable safer and faster stent release. This invention provides a novel way to resolve bile duct obstruction, while saving surgical time, surgical instruments, and reducing surgical difficulty, making it possible for more doctors to perform this procedure. Summary of the Invention

[0008] The thermal puncture stent placement device of this invention eliminates the traditional inner tube and conductive wire of the placement device, replacing them with conductive components that serve both to support the stent and to transmit high-frequency electricity. This reduces the outer diameter of existing thermal puncture placement devices from 3.5mm–3.6mm (10.5Fr–10.8Fr) to 3.15mm (9.5Fr), allowing the thermal puncture placement device to pass through the traditional 3.2mm endoscopic forceps channel. This enables surgeons to perform more advanced procedures such as cholecystoanastomosis, duodenal-cholecystoanastomosis, stent anastomosis of gastropancreatic pseudocysts, gastrointestinal anastomosis, and NOTES procedures.

[0009] Hereinafter, one end of the conductive head will be defined as the distal end, and the end of the inserter that is connected to the power source will be defined as the proximal end.

[0010] The thermal puncture stent implanter has a proximal end and a distal end. The distal end of the front handle has an outer tube extending from the proximal end to the distal end. The outer diameter of the distal end of the outer tube is less than or equal to 3.15 mm. An insulating middle tube extends from the proximal end into the outer tube. A conductive part is located within the insulating middle tube, and both the insulating middle tube and the conductive part extend from the proximal end to the distal end. The proximal end of the conductive part can be connected to an external power source. A booster tube is located between the proximal end of the outer tube and the insulating middle tube, and the distal end of the booster tube is connected to the proximal end of the insulating middle tube. An insulating part is located at the distal end of the conductive part, and conductive heads are distributed on the insulating part. The conductive heads connect to the conductive part to achieve conductivity. After compression, the stent is located in the space between the distal end of the conductive part and the outer tube. The front handle is connected to the proximal end of the outer tube. Retracting the front handle along the booster tube causes the outer tube to retract, releasing the stent. The conductive part serves both to conduct electricity and to support the stent. Compared with traditional stent implanters, it reduces the need for an inner tube and guide wire, while still conducting electricity to cut tissue and release the stent after reaching the lesion location.

[0011] There is a certain gap between the insulating part and the conductive part. A conductive head is provided at the distal end of the inserter. One end of the conductive head can extend from the distal end to the proximal end into the gap between the insulating part and the conductive part, thereby connecting with the conductive part to realize the conductive function. The other end of the conductive head covers the outer surface of the insulating part.

[0012] Preferably, the conductive part is a hollow conductive part.

[0013] More preferably, the proximal end of the conductive part is connected to the Luer connector to achieve liquid injection.

[0014] Preferably, the conductive part is a conductive wire.

[0015] Preferably, the conductive part is a nickel-titanium wire.

[0016] Preferably, the conductive part is made of a metallic material. More preferably, the conductive part is made of stainless steel.

[0017] Preferably, the insulating part is made of ceramic.

[0018] The outer tube includes a proximal outer tube and a distal outer tube, which are connected by a tapered joint. A booster tube extends proximally and connects to the rear handle. A positioning part is provided between the front and rear handles. A resistance part is covered on the outer surface of the conductive part at a certain distance from the conductive head. The conductive head consists of two or four conductive wires, which are evenly distributed within a groove on the outer surface of the insulating part. The other end of the conductive head, near the outer side, completely covers the outer surface of the insulating part, resulting in a circular cut surface when the conductive head is used for cutting. The outer surface of the conductive part may be covered with a riveting tube. One end of the conductive head can extend from the distal end to the proximal end into the gap between the insulating part and the conductive part, connecting to the conductive part through the riveting tube to achieve conductivity.

[0019] Beneficial effects:

[0020] The outer diameter of the thermal puncture stent of this invention is smaller than that of the stent implanter in the prior art, providing a new minimally invasive treatment method for many patients with gastrointestinal and biliary pancreatic diseases who cannot or do not wish to undergo surgery.

[0021] The thermal puncture implanter of this invention can accommodate a φ10mm~φ16mm diameter double mushroom-head nickel-titanium wire braided metal stent (3.15mm diameter implanter). It is inserted into the stomach, duodenum and other organs through a 3.2mm forceps channel of a traditional endoscope. The implanter is electrically punctured through the stomach or intestinal wall and enters the small intestine, gallbladder, pancreatic cyst, common bile duct and other structures for precise stent release. The stent can be anastomosed to the stomach or intestinal wall respectively to achieve functions such as drainage, gallbladder preservation, stone removal and bypass opening.

[0022] By analogy, if the outer diameter of the thermal puncture implant of this application is increased from 3.15mm (9.5Fr) to 3.5mm to 3.6mm (10.5Fr to 10.8Fr), the cross-sectional area of ​​the implant increases by 23% to 31%, thus allowing for the insertion of double mushroom-shaped nickel-titanium wire braided metal stents (φ10mm to φ18mm) with a larger diameter range. Attached Figure Description

[0023] Figure 1A This is a schematic diagram of the cross-section of the implant;

[0024] Figure 1B This is a schematic diagram of the distal structure of the implanter in cross-section;

[0025] Figure 2 This is an overall schematic diagram of the implantation device product;

[0026] Figure 3A When the conductive part is a hollow conductive part Figure 1B BB cross-sectional diagram;

[0027] Figure 3BWhen the conductive part is a hollow conductive part Figure 1B A schematic diagram of the CC cross-section;

[0028] Figure 4A When the conductive part is a conductive wire Figure 1B BB cross-sectional diagram;

[0029] Figure 4B When the conductive part is a conductive wire Figure 1B A schematic diagram of the CC cross-section;

[0030] Figure 5A Is with Figure 3A and 3B Cross-sectional view of the proximal tail structure of the corresponding stent implanter;

[0031] Figure 5B This is a magnified view of a section of 5A.

[0032] Figure 6 Is with Figure 4A and 4B Cross-sectional view of the proximal tail structure of the corresponding stent implanter;

[0033] Figures 7A-7D These are schematic diagrams of the distal ends of different types of implanters;

[0034] Figures 8A-8B This is a schematic diagram of the distal end of the integrated implant;

[0035] Figures 9A-9B This is a schematic diagram of the distal end of a split-type implanter;

[0036] Figures 10A-10C This is a schematic diagram of the distal end of the flanged inserter;

[0037] Figure 11 This is a diagram of the safety latch;

[0038] Figure 12 This is a schematic diagram of the double mushroom support fully open.

[0039] 11. Conductive head, 12. Insulating part, 13. Conductive part, 21. Outer tube, 211. Proximal outer tube, 212. Distal outer tube, 22. Boost tube, 23. Insulating middle tube, 24. Safety buckle, 25. Outer tube locking cap, 26. Safety lock, 27. Positioning part, 28. Resistance part, 29. Riveting tube, 30. Front handle, 31. Rear handle, 32. Conductive base, 33. Conductive plug, 34. Luer connector, 40. Distal tissue, 41. Proximal tissue, 42. Double mushroom head bracket. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0041] Hereinafter, one end of the conductive head is defined as the distal end, and the end of the bracket inserter that is connected to power is defined as the proximal end.

[0042] like Figure 1A , 1B and Figure 2 As shown, the stent implanter of the present invention has a proximal end and a distal end. The stent implanter includes an outer tube 21, a booster tube 22, an insulating middle tube 23, an outer tube locking cap 25, a safety lock 26, a positioning part 27, a resistance part 28, a front handle 30, a rear handle 31, a conductive base 32, a conductive plug 33, a Luer connector 34, a conductive head 11, an insulating part 12, and a conductive part 13.

[0043] The outer tube 21 includes a proximal outer tube 211 and a distal outer tube 212. The proximal outer tube 211 is located at the distal end of the front handle 30 and can be fixed to the front handle 30 by means of the outer tube locking cap 25. The proximal end of the front handle 30 is provided with a safety lock 26, which has threads and can be matched with the threads of the proximal end of the front handle 30 for installation. The outer tube 21 contains an insulating middle tube 23 and a stent. The proximal end of the stent abuts against the distal end of the insulating middle tube 23, and the distal end of the stent is close to the insulating part 12 with a certain gap. The proximal outer tube 211 and the distal outer tube 212 are tapered. A push tube 22, which can be made of stainless steel, is provided between the proximal outer tube 211 and the insulating middle tube 23. The tapered design of the proximal outer tube 211 and the distal outer tube 212 ensures that the size of the distal outer tube 212 entering the lesion site is less than or equal to 3.15 mm. The push tube 22 between the proximal outer tube 211 and the insulating middle tube 23 provides the force required to release the stent. The insulating middle tube 23 can be made of a special polymer material, polyetheretherketone (PEEK), which has high-performance electrical insulation properties. It can insulate the high-frequency electricity of the conductive part 13 from the push tube 22, completely avoiding the risk of electric shock to the operator. The booster tube 22 extends to the proximal end and connects to the rear handle 31. A conductive seat 32 is provided at the proximal end of the rear handle 31. The conductive seat 32 contains a conductive plug 33. The conductive plug 33 can be connected to the conductive head 11 through the conductive part 13, thereby realizing the power supply.

[0044] A positioning part 27 can also be provided between the front handle 30 and the rear handle 31. The positioning part 27 can be designed as a safety buckle 24, such as... Figure 1A and Figure 11As shown, the positioning part 27 has a safety buckle 24 structure. When releasing the stent, first loosen the safety lock 26, then pull the front handle 30 back towards the proximal end until it touches the safety buckle 24. The distal end of the stent is released within the distal tissue 40. Then, retract the stent inserter, pull the stent closer to the proximal tissue, remove the safety buckle 24, and continue to pull the front handle 30 back towards the proximal end. The stent is then released further within the proximal tissue 41, thereby achieving the connection between the distal tissue 40 and the proximal tissue 41.

[0045] On the outer surface of the conductive part 13 at a certain distance from the conductive head 11, a resistance part 28 may be covered. When the stent is released, the resistance part 28 can provide a certain resistance to the stent, making it less likely for the stent to slip outside the lesion.

[0046] The distal end of the stent implanter also includes a conductive head 11, an insulating part 12, and a conductive part 13. When a high-frequency power supply is connected to the conductive plug 33, the high-frequency power is transmitted to the conductive head 11 through the conductive part 13, enabling the stent implanter to perform electrocautery, cutting human tissue at high frequency. The conductive part 13 can be any type of medical metal material, such as nickel-titanium or stainless steel. The conductive part 13 is located inside the insulating tube 23, extending from the distal end to the proximal end, and is connected to the conductive plug 33 through the rear handle 31. The outer diameter of the conductive part 13 can be designed according to actual needs. This invention can reduce the outer diameter of the implantation part of the existing thermal puncture stent implanter from 3.5mm to 3.6mm (10.5Fr to 10.8Fr) to below 3.2mm (9Fr) through the design of the conductive part 13, preferably to 3.15mm (9.5Fr). In addition, the conductive part 13 can be a hollow conductive part, thereby realizing the liquid injection and imaging function, or the conductive part 13 can be designed as a conductive wire. When the conductive part 13 is designed as a hollow conductive part Figure 1B The cross-sectional view at the BB location is as follows Figure 3A The diagram shows the positional relationship between the conductive part 13, the insulating middle tube 23, and the distal outer tube 212. Figure 1B The cross-sectional view at the CC position is as follows Figure 3B The diagram shows the positional relationship between the conductive part 13, the insulating middle tube 23, and the near-end outer tube 211. Figure 5A Is with Figure 3A and 3B Cross-sectional view of the proximal tail structure of the corresponding stent implanter. Figure 5BThis is a magnified view of a portion of 5A. The conductive base 32 contains a conductive plug 33, which can be connected to the conductive head 11 via the conductive part 13 to enable power supply. The proximal end of the conductive part 13 is connected to the Luer connector 34. The doctor can connect the Luer connector 34 using a standard injector and inject liquid or contrast agent into the hollow lumen. The liquid contrast agent passes through the lumen of the conductive part 13 to the distal conductive head 11 of the implanter, and is then injected into the patient's lesion location. The contrast agent is visualized under X-rays, allowing the doctor to identify the target location of the lesion and prepare for the next step of stent release.

[0047] When the conductive part 13 is designed as a conductive wire, the conductive wire can be of different sizes as required. Figure 1B The cross-sectional view at the BB location is as follows Figure 4A The diagram shows the positional relationship between the conductive part 13, the insulating middle tube 23, and the distal outer tube 212. Figure 1B The cross-sectional view at the CC position is as follows Figure 4B The diagram shows the positional relationship between the conductive part 13, the insulating middle tube 23, and the near-end outer tube 211. Figure 6 Is with Figure 4A and 4B The corresponding cross-sectional view of the proximal tail structure of the stent implanter shows that the conductive base 32 has a conductive plug 33, which can be connected to the conductive head 11 through the conductive part 13 to achieve power supply.

[0048] The insulating part 12 is located at the distal end of the conductive part 13, and there is a certain gap between the insulating part 12 and the conductive part 13. One end of the conductive head 11 can extend from the distal end to the proximal end into the gap between the insulating part 12 and the conductive part 13, thereby connecting with the conductive part 13 to achieve the conductive function. The other end of the conductive head 11 covers the outer surface of the insulating part 12. High-frequency electricity is transmitted through the conductive part 13 to the distal conductive head 11 of the stent implanter, enabling the stent implanter to have an electrocutting function, which can perform high-frequency cutting and puncture of human tissue. The insulating part 12 can be made of materials such as ceramic to prevent tissue adhesion and make cutting easier.

[0049] The conductive part 13 of this invention replaces the inner tube and conductive wire of the traditional stent implanter, and has a conductive function. The original outer diameter of the inner tube φ1.1mm and the outer diameter of the conductive wire φ0.3mm are replaced by the conductive part 13 with a diameter of less than φ0.4mm, which reduces the total diameter by φ1mm (reducing the space by 3Fr). This allows conventional covered gastrointestinal stents (10mm~16mm) to be inserted. Furthermore, the outer diameter of the traditional thermal implanter is reduced from φ3.5mm~φ3.6mm (10.5Fr~10.8Fr) to 3.15mm (9.5Fr), allowing the electrical implanter to pass smoothly through the φ3.2mm gastroscopy forceps channel.

[0050] The structure of the conductive head 11, insulating part 12, and conductive part 13 at the distal end of the stent placement device of the present invention can be as follows: Figures 7A-7D As shown, the conductive head 11 can be composed of two or four conductive wires. One end of the conductive head 11 extends from the distal end to the proximal end into the gap between the insulating part 12 and the conductive part 13, thereby connecting with the conductive part 13 to achieve the conductive function. The other end of the conductive head 11 covers the outer surface of the insulating part 12. Alternatively, the conductive head 11 can have two or four conductive wires evenly distributed in a groove on the outer surface of the insulating part 12 at its distal end to achieve a conductive cutting function. Adjacent conductive wires in the groove on the outer surface of the insulating head 12 are spaced at the same angle and are radially distributed on the outer surface of the insulating head 12.

[0051] like Figures 8A-8B As shown, one end of the conductive head 11 can extend from the distal end to the proximal end into the gap between the insulating part 12 and the conductive part 13, thereby connecting with the conductive part 13 to achieve the conductive function. The other end of the conductive head 11 completely covers the outer surface of the insulating part 12. When cutting with the conductive head 11, the cutting surface is a circular surface instead of a straight cut, which makes it easier to stop bleeding when using hemostatic clips and is beneficial to wound healing.

[0052] like Figures 9A-9B As shown, the outer surface of the conductive part 13 can be covered with a rivet tube 29. One end of the conductive head 11 can extend from the distal end to the proximal end into the gap between the insulating part 12 and the conductive part 13. The conductive function is achieved by connecting the conductive part 13 through the rivet tube 29. The rivet tube 29 can be made of stainless steel and can connect the conductive part 13 and the insulating part 12. Figure 9A As shown, the other end of the conductive head 11 can completely cover the outer surface of the insulating part 12. When the conductive head 11 is used for cutting, the cutting surface is a circular surface instead of a straight cut, which is beneficial for wound healing.

[0053] like Figures 10A-10C As shown, the other end of the conductive head 11 can also be distributed in the groove on the surface of the insulating head 12 in the form of a conductive wire, and wrapped around the far end of the support inserter to form a straight bevel conductive cut. At this time, when cutting tissue, the wrapped conductive wire and the conductive wire distributed in the groove are used.

[0054] When the stent implanter of the present invention is used, after a high-frequency power supply is connected to the conductive plug 33, the high-frequency power supply is transmitted to the conductive head 11 through the conductive part 13, so that the stent implanter has an electrocautery function and can cut the distal tissue 40 of the lesion. If the conductive part 13 is a hollow conductive part, a Luer connector is connected to it, so that the stent implanter has an injection function.

[0055] like Figure 12As shown, the double mushroom-head stent 42 is released by the thermal puncture stent placement device. When the double mushroom-head stent 42 is opened, one end is in the distal tissue 40 and the other end is in the proximal tissue 41.

[0056] The above description is merely a preferred embodiment of this application, enabling those skilled in the art to understand or implement the invention of this application. Various modifications and combinations of these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A thermal puncture stent implanter, characterized in that, The thermal puncture stent implanter has a proximal end and a distal end. The distal end of the front handle has an outer tube extending from the proximal end to the distal end. An insulating middle tube is located inside the outer tube, and a conductive part is located inside the insulating middle tube. Both the insulating middle tube and the conductive part extend from the proximal end to the distal end. The proximal end of the conductive part is connected to an external power source. A booster tube is located between the proximal end of the outer tube and the insulating middle tube, and the distal end of the booster tube is connected to the proximal end of the insulating middle tube. The distal end of the conductive part has an insulating portion with conductive heads distributed on it. The conductive heads are connected to the conductive part to achieve conductivity. The conductive part also supports the stent. When compressed, the stent is located in the space between the distal end of the conductive part and the outer tube. The front handle is connected to the proximal end of the outer tube. Retracting the front handle along the booster tube causes the outer tube to retract, releasing the stent. The booster tube extends proximally and connects to the rear handle. The conductive part is made of metal and is a hollow tubular conductive part; the proximal end of the conductive part is used for liquid injection so that the liquid reaches the conductive head through the lumen of the conductive part.

2. The thermal puncture stent implanter according to claim 1, characterized in that, There is a certain gap between the insulating part and the conductive part. A conductive head is provided at the distal end of the inserter. One end of the conductive head extends from the distal end to the proximal end into the gap between the insulating part and the conductive part, thereby connecting with the conductive part to achieve the conductive function. The other end of the conductive head covers the outer surface of the insulating part.

3. The thermal puncture stent implanter according to claim 1, characterized in that, The proximal end of the conductive part is connected to the Luer connector to achieve liquid injection.

4. The thermal puncture stent placement device according to claim 1, characterized in that, The conductive part is made of stainless steel.

5. The thermal puncture stent placement device according to claim 1, characterized in that, The outer tube includes a proximal outer tube and a distal outer tube, and the proximal outer tube and the distal outer tube are connected by a tapered joint.

6. The thermal puncture stent implanter according to claim 1, characterized in that, A positioning part is provided between the front handle and the rear handle.

7. The thermal puncture stent implanter according to claim 1, characterized in that, A resistance portion is covered on the outer surface of the conductive part at a certain distance from the conductive head.

8. The thermal puncture stent implanter according to claim 1, characterized in that, The conductive head consists of two or four conductive wires, which are evenly distributed in the grooves on the outer surface of the insulating part.

9. The thermal puncture stent placement device according to claim 1, characterized in that, The other end of the conductive head near the outside completely covers the outer surface of the insulating part, and when the conductive head is used for cutting, the cut surface of the wound is circular.

10. The thermal puncture stent implanter according to claim 1, characterized in that, The outer surface of the conductive part is covered with a rivet tube. One end of the conductive head extends from the distal end to the proximal end into the gap between the insulating part and the conductive part. The conductive function is achieved by connecting the conductive part with the rivet tube.

11. The thermal puncture stent implanter according to claim 1, characterized in that, The insulating part is made of ceramic.

12. The thermal puncture stent implanter according to claim 1, characterized in that, The proximal end of the rear handle is provided with a conductive seat, and the conductive seat contains a conductive plug, which is connected to the conductive head through the conductive part.

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