Thermal puncture stent introducer

Abstract

The stent introducer is provided with a near end and a far end, an outer tube is arranged at the far end of a front handle and extends from the near end to the far end, the outer diameter of the far end of the outer tube is smaller than or equal to 3.15 mm, an insulating middle tube is arranged in the outer tube and extends from the near end to the far end, and a conductive part is arranged in the insulating middle tube and extends from the near end to the far end; the tail end of the near end of the conductive part can be connected with an external power supply, a boosting tube is arranged between the near end of the outer tube and the insulating middle tube, the far end of the boosting tube is connected with the near end of the insulating middle tube, an insulating part is arranged at the far end of the conductive part, conductive heads are distributed on the insulating part, and the conductive heads are connected with the conductive part to realize a conductive function. The support is located in the space between the far end of the conductive part and the outer tube after being compressed, and the conductive part plays a role in conducting electricity and supporting the support at the same time. The front handle is connected with the near end of the outer tube, and the front handle is withdrawn along the boosting tube to drive the outer tube to withdraw to release the stent.

Description

[0001] This application is a divisional application. The application number of the original application is 2018106065652, and the original application date is June 13, 2018. The entire content of the original application is incorporated into this application by reference. Technical Field

[0002] The present invention relates to a thermal puncture inserter in the field of medical devices, and in particular to a thermal puncture stent inserter integrating cutting and injection functions. Background Art

[0003] Gastrointestinal cholecystostomy involves endoscopically inserting a thermal inserter through the stomach or duodenal wall into the target gallbladder. The distal end of a fully covered double mushroom-head stent is placed in the gallbladder, while the proximal end of the mushroom head is placed in the stomach or duodenum. This creates a new pathway between the digestive tract and gallbladder, essentially recreating a new path between the digestive tract and gallbladder. Through the gastroscope and the recreated pathway, a stone retrieval basket is used to remove the gallbladder stones, thus achieving endoscopic gallstone removal. This offers a novel treatment option for patients with gallbladder disease who are not suitable for surgery, and also provides a method for preserving gallbladder function in patients with well-functioning gallbladders, thereby improving their long-term quality of life. In gastropancreatic pseudocyst stent anastomosis, a large-caliber fully covered double mushroom-head stent is placed through endoscopic transgastric puncture into the patient's pancreatic pseudocyst, achieving an anastomosis between the stomach and pancreatic pseudocyst, thereby adequately draining the fluid and necrotic material within the pancreatic pseudocyst.

[0004] Duodenocholangiostomy, a traditional ERCP procedure, involves inserting a guidewire or other instrument through the duodenum through the duodenal papilla to reach the common bile duct for stone removal and biopsy. For patients with difficult guidewire insertion, percutaneous puncture or surgical intervention is often required, potentially reducing quality of life or causing greater trauma.

[0005] Gastrointestinal anastomosis: When the passage from the stomach to the intestine is blocked by tumor invasion, patients with persistent vomiting have previously either undergone open surgery to create a new gastrointestinal passage or relied on intravenous nutrition support. For those who are older or whose physical condition is no longer suitable for open surgery, their quality of life is extremely low, and it also places a heavy burden on their families. Gastrointestinal anastomosis is to enter the proximal small intestine through gastric puncture under endoscopy and place a large-caliber fully covered double mushroom head stent to open the passage between the stomach and small intestine. In other words, a new path between the stomach and small intestine is rebuilt, thereby resolving the impact of duodenal obstruction on the patient's life.

[0006] In the past, such "bypass" construction required open surgery under general anesthesia, which was quite invasive. However, minimally invasive endoscopic surgery offers minimal trauma, shorter operative time, less pain, and faster recovery, fully demonstrating the advantages of minimally invasive endoscopic surgery. In recent years, with the continuous development and upgrading of endoscopic technology and various instrumentation accessories, endoscopy has played an increasingly important role in the diagnosis and treatment of various digestive system diseases. In particular, continuous innovations in minimally invasive endoscopic procedures have provided new minimally invasive treatment options for many patients with gastrointestinal and pancreatic diseases who are unable or unwilling to undergo surgery. Currently, for the four traditional procedures mentioned above, stents typically have a diameter of 10 to 16 mm, a double mushroom-head metal stent, and the accompanying thermal inserter has an outer diameter of 3.5 to 3.6 mm (10.5 to 10.8 Fr). The traditional ultrasound endoscopic channel is 3.7 mm. Due to the narrow clearance, the traditional charged inserter is difficult to move back and forth within the endoscopic channel, which is the main reason for the difficulty in performing these procedures. At the same time, the outer diameter of the ultrasonic endoscope is φ14mm, which is 4mm larger than the outer diameter of the traditional gastroscope of φ10mm. It is more inconvenient to operate and can reach relatively fewer places.

[0007] Therefore, in order to perform gastrobiliary anastomosis, gastrointestinal anastomosis and natural orifice transluminal endoscopic surgery (NOTES) through gastroscopy, it is necessary to design a smaller charged inserter to simplify the stent release steps through the gastroscopic clamp channel so that the stent can be released more safely and quickly. The present invention provides a new way to solve bile duct obstruction, while saving operation time, saving surgical instruments, reducing the difficulty of the operation, and making it possible for more doctors to perform this operation. Summary of the Invention

[0008] The thermal stent inserter of the present invention eliminates the traditional inserter inner tube and conductive wire, replacing them with a conductive component that both supports the stent and transmits high-frequency electricity. The outer diameter of the existing thermal stent inserter can be reduced from 3.5mm to 3.6mm (10.5Fr to 10.8Fr) to 3.15mm (9.5Fr), allowing it to pass through the traditional 3.2mm diameter gastroscopic forceps channel. This allows doctors to perform more advanced digestive tract cholecystostomy, duodenal bile duct anastomosis, gastropancreatic pseudocyst stent anastomosis, gastrointestinal anastomosis, and NOTES procedures.

[0009] In the following, one end of the conductive head is defined as the distal end, and the end of the inserter that is externally connected to the power supply is defined as the proximal end.

[0010] The thermal puncture stent inserter has a proximal end and a distal end. The distal end of the front handle is provided with an outer tube, which extends 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 is provided in the outer tube, which extends from the proximal end to the distal end. A conductive part is provided in the insulating middle tube. 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 supply; a booster tube is provided 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 insulating part is located at the distal end of the conductive part, and the distal end of the conductive part is provided with an insulating part. Conductive heads are distributed on the insulating part, and the conductive heads are connected to the conductive part to realize the conductive function. After the stent is compressed, it 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. The front handle is retracted along the booster tube to drive the outer tube to retract and release the stent. The conductive part not only plays a conductive role, but also plays a supporting role in the stent. Compared with the traditional stent implanter, it reduces the inner tube and guide wire. At the same time, it can conduct electricity, cut the 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 portion is a hollow conductive portion.

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

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

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

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

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

[0018] 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 taper. The booster tube extends proximally and is connected to the rear handle, and a positioning portion is provided between the front handle and the rear handle. A resistance portion is covered on the outer surface of the conductive part at a certain distance from the conductive head. The conductive head is composed of two or four conductive wires, and the two or four conductive wires are evenly distributed in the grooves on the outer surface of the insulating part. The other end of the conductive head close to the outside is completely covered on the outer surface of the insulating part, and when the conductive head is used for cutting, the wound cutting surface is a circular surface. The outer surface of the conductive part can be covered with a riveted tube, and 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, and the conductive function is realized by being connected to the conductive part through the riveted tube.

[0019] Beneficial effects:

[0020] The outer diameter of the thermal puncture stent of the present invention is smaller than the outer diameter of the stent implanter in the prior art, and provides a new minimally invasive treatment method for many patients with gastrointestinal and pancreatic and biliary diseases who are unable or unwilling to undergo surgery.

[0021] The thermal puncture inserter of the present invention can be equipped with a double mushroom-head nickel-titanium wire braided metal stent with a diameter of φ10mm to φ16mm (the inserter has a diameter of 3.15mm), and enter the stomach, duodenum and other organs through the 3.2mm channel of a traditional gastroscope. The inserter is electrified to puncture the stomach wall or intestinal wall, enter the small intestine, gallbladder, pancreatic cyst, common bile duct and other structures, and accurately release the stent. The above tissues can be anastomosed with the stomach wall or intestinal wall respectively, realizing functions such as drainage, gallbladder preservation, stone removal, and bypass opening.

[0022] By reasoning accordingly, if the outer diameter of the thermal puncture inserter of the present application is increased from 3.15mm (9.5Fr) to 3.5mm~3.6mm (10.5Fr~10.8Fr), the cross-sectional area of ​​the inserter increases by 23%-31%, so that a double mushroom head nickel-titanium wire braided metal stent with a larger diameter range (φ10mm~φ18mm) can be installed therein. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1A is a schematic cross-sectional view of the inserter;

[0024] Figure 1B 1 is a schematic diagram of the distal end structure of the inserter;

[0025] Figure 2 This is an overall schematic diagram of the inserter 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 Schematic diagram of 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 Schematic diagram of CC cross section;

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

[0031] Figure 5B This is a partial enlarged view of 5A;

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

[0033] Figures 7A-7D Schematic diagram of the distal end of different types of inserters;

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

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

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

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

[0038] Figure 12 This is a diagram of the double mushroom stand fully opened.

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

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present 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 only used to explain the present invention and are not intended to limit the present invention.

[0041] In the following, one end of the conductive head is defined as the distal end, and the end of the stent implanter that is externally connected to the power supply 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, and 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 portion 27, a resistance portion 28, a front handle 30, a rear handle 31, a conductive seat 32, a conductive plug 33, a Luer connector 34, a conductive head 11, an insulating portion 12, and a conductive portion 13.

[0043] The outer tube 21 includes a proximal outer tube 211 and a distal outer tube 212. The proximal outer tube 211 is arranged at the distal end of the front handle 30 and can be fixed to the front handle 30 through the outer tube locking cap 25. A safety lock 26 is provided at the proximal end of the front handle 30. The safety lock 26 has threads and can be matched with the proximal threads of the front handle 30 for installation. An insulating middle tube 23 and a stent are provided within the outer tube 21. 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 portion 12, leaving a certain gap. The proximal outer tube 211 and the distal outer tube 212 are connected by a taper. A booster tube 22 is provided between the proximal outer tube 211 and the insulating middle tube 23. The booster tube 22 can be made of stainless steel. The distal end of the booster tube 22 is connected to the proximal end of the insulating middle tube 23. The taper 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 is less than or equal to 3.15 mm. The booster tube 22 is provided between the proximal outer tube 211 and the insulating middle tube 23 to provide the force required to release the stent. The insulating middle tube 23 can be made of a special polymer material, polyetheretherketone, which has high-performance electrical insulation and can insulate the high-frequency electricity of the conductive portion 13 from the booster tube 22, completely avoiding the risk of electric shock to the operator. The booster tube 22 extends to the proximal end and is connected to the rear handle 31. A conductive seat 32 is provided at the proximal end of the rear handle 31. The conductive seat 32 has a conductive plug 33. The conductive plug 33 can be connected to the conductive head 11 through the conductive part 13 to achieve power supply.

[0044] A positioning portion 27 may be provided between the front handle 30 and the rear handle 31. The positioning portion 27 may be designed as a safety buckle 24. Figure 1A and Figure 11As shown, the positioning portion 27 is a safety buckle 24 structure. When releasing the stent, first loosen the safety lock 26, withdraw the front handle 30 toward the proximal end, touch the safety buckle 24, and the distal end of the stent is released in the distal tissue 40. Retract the stent inserter, pull the stent close to the proximal tissue, remove the safety buckle 24, continue to withdraw the front handle 30 toward the proximal end, and continue to release the stent in the proximal tissue 41, so that the stent can anastomose and connect the distal tissue 40 and the proximal tissue 41.

[0045] The outer surface of the conductive portion 13 at a certain distance from the conductive head 11 may be covered with a resistance portion 28. The resistance portion 28 may provide a certain resistance to the stent when the stent is released, so that the stent is not likely to slide outside the lesion.

[0046] The distal end of the stent implanter also includes a conductive head 11, an insulating portion 12, and a conductive portion 13. When the conductive plug 33 is connected to a high-frequency power source, the high-frequency power is transmitted to the conductive head 11 through the conductive portion 13, enabling the stent implanter to have an electrocuting function, performing high-frequency cutting on human tissue. The conductive portion 13 can be made of any type of medical metal material, such as nickel-titanium or stainless steel. The conductive portion 13 is disposed within the insulating middle tube 23, extending from the distal end to the proximal end, and is connected to the conductive plug 33 via the rear handle 31. The outer diameter of the conductive portion 13 can be designed according to actual needs. The present invention can reduce the outer diameter of the implant portion of the existing thermal puncture stent implanter from 3.5mm to 3.6mm (10.5Fr to 10.8Fr) to less than 3.2mm (9Fr), preferably to 3.15mm (9.5Fr), through the design of the conductive portion 13. In addition, the conductive portion 13 can be a hollow conductive portion to achieve a liquid injection and development function, or the conductive portion 13 can be designed as a conductive wire. When the conductive portion 13 is designed as a hollow conductive portion, Figure 1B The cross-sectional view at the BB position is as follows Figure 3A As shown, the positional relationship among the conductive portion 13, the insulating middle tube 23 and the distal outer tube 212 is shown. Figure 1B The cross-sectional view at the CC position is as follows Figure 3B As shown, the positional relationship between the conductive portion 13, the insulating middle tube 23 and the proximal outer tube 211 is shown; Figure 5A is with Figure 3A and 3B The corresponding cross-sectional view of the proximal tail structure of the stent implanter, Figure 5BThis is a partial enlarged view of 5A. The conductive seat 32 has a conductive plug 33 inside. The conductive plug 33 can be connected to the conductive head 11 through the conductive portion 13 to achieve power supply. The proximal end of the conductive portion 13 is connected to the Luer connector 34. The doctor can connect the Luer connector 34 through a standard injector and inject liquid or contrast agent into the hollow lumen. The liquid contrast agent passes through the lumen of the conductive portion 13 and reaches the distal conductive head 11 of the implant, and is then injected into the patient's lesion location. The contrast agent develops under X-rays, marking the target lesion location for the doctor, who can then prepare for the next step of stent release.

[0047] When the conductive portion 13 is designed as a conductive thread, the conductive thread can have different sizes according to requirements. Figure 1B The cross-sectional view at the BB position is as follows Figure 4A As shown, the positional relationship among the conductive portion 13, the insulating middle tube 23 and the distal outer tube 212 is shown. Figure 1B The cross-sectional view at the CC position is as follows Figure 4B As shown, the positional relationship between the conductive portion 13, the insulating middle tube 23 and the proximal outer tube 211 is shown; Figure 6 is with Figure 4A and 4B The corresponding cross-sectional view of the proximal tail structure of the stent implanter shows that a conductive plug 33 is provided in the conductive seat 32 , and the conductive plug 33 can be connected to the conductive head 11 through the conductive portion 13 , thereby achieving electrical conduction.

[0048] Insulating portion 12 is located distally of conductive portion 13, with a gap between them. One end of conductive tip 11 can extend from the distal end toward the proximal end into the gap between insulating portion 12 and conductive portion 13, thereby connecting with conductive portion 13 and achieving electrical conductivity. The other end of conductive tip 11 covers the outer surface of insulating portion 12. High-frequency electricity is transmitted through conductive portion 13 to the distal conductive tip 11 of the stent implanter, enabling the stent implanter to perform electrical cutting, enabling high-frequency cutting and puncturing of human tissue. Insulating portion 12 can be made of materials such as ceramic to prevent tissue adhesion and facilitate cutting.

[0049] The conductive portion 13 of the present invention replaces the inner tube and conductive wire of a conventional stent implanter and has a conductive function. The original inner tube outer diameter of φ1.1mm and the conductive wire outer diameter of φ0.3mm are replaced with a conductive portion 13 with a diameter less than φ0.4mm. The total diameter is reduced by φ1mm (reducing the space by 3Fr), allowing conventional coated gastrointestinal stents (10mm to 16mm) to be installed. The outer diameter of the conventional thermal implanter is reduced from φ3.5mm to φ3.6mm (10.5Fr to 10.8Fr) to 3.15mm (9.5Fr), allowing the electrical implanter to pass smoothly through the φ3.2mm gastroscopic channel.

[0050] The structure of the electrically conductive head 11, the insulating part 12 and the electrically conductive part 13 at the distal end of the stent implanting device of the present application can be as shown in Figures 7A-7D The electrically conductive head 11 can be composed of two or four electrically conductive wires, one end of which extends from the distal end to the proximal end into the gap between the insulating part 12 and the electrically conductive part 13, thereby connecting with the electrically conductive part 13 to realize the electrically conductive function, and the other end of the electrically conductive head 11 covers the outer surface of the insulating part 12. The electrically conductive head 11 can also be evenly distributed in the groove on the outer surface of the insulating part 12 at the distal end in the form of two or four electrically conductive wires, thereby realizing the electrically conductive cutting function. The adjacent electrically conductive wires in the groove on the outer surface of the insulating head 12 have the same interval angle and are distributed radially on the outer surface of the insulating head 12 in a radial manner.

[0051] As shown in Figures 8A-8B , one end of the electrically conductive head 11 can extend from the distal end to the proximal end into the gap between the insulating part 12 and the electrically conductive part 13, thereby connecting with the electrically conductive part 13 to realize the electrically conductive function, and the other end of the electrically conductive head 11 completely covers the outer surface of the insulating part 12. At this time, when cutting with the electrically conductive head 11, the cutting surface is a circular surface rather than a straight cut, which is more conducive to hemostasis when using hemostatic clips and is beneficial to wound healing.

[0052] As shown in Figures 9A-9B , the outer surface of the electrically conductive part 13 can be covered with a riveting pipe 29, one end of the electrically conductive head 11 can extend from the distal end to the proximal end into the gap between the insulating part 12 and the electrically conductive part 13, and the electrically conductive head 11 can be connected with the electrically conductive part 13 through the riveting pipe 29 to realize the electrically conductive function. The riveting pipe 29 can be made of stainless steel material and can connect the electrically conductive part 13 and the insulating part 12. As shown in Figure 9A , the other end of the electrically conductive head 11 can completely cover the outer surface of the insulating part 12. At this time, when cutting with the electrically conductive head 11, the cutting surface is a circular surface rather than a straight cut, which is beneficial to wound healing.

[0053] As shown in Figures 10A-10C , the other end of the electrically conductive head 11 can also be distributed in the form of one electrically conductive wire in the groove on the surface of the insulating head 12 and wound around the distal end of the stent implanting device to form a straight bevel electrically conductive cut. At this time, when cutting the tissue, the electrically conductive wire wound around and the electrically conductive wire distributed in the groove are used.

[0054] When the stent implanting device of the present application is used, after the electrically conductive plug 33 is connected with the high-frequency power supply, the high-frequency power supply is transmitted to the electrically conductive head 11 through the electrically conductive part 13, so that the stent implanting device has an electric cutting function and can cut the distal tissue 40 of the lesion. If the electrically conductive part 13 is a hollow electrically conductive part, a luer connector is connected, so that the stent implanting device has a liquid injection function.

[0055] As shown in Figure 12As shown, the double mushroom head stent 42 is released by a thermal puncture stent inserter. 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 foregoing description is intended only to provide preferred embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. 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 the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to encompass the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A thermal puncture stent implanter, characterized in that: The thermal puncture stent inserter has a proximal end and a distal end, and an outer tube is provided at the distal end of the front handle, the outer tube extends from the proximal end to the distal end, an insulating middle tube is provided in the outer tube, and a conductive part is provided in the insulating middle tube, and both the insulating middle tube and the conductive part extend from the proximal end to the distal end, and the proximal end of the conductive part can be connected to an external power supply; a booster tube is provided 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 is provided with an insulating part, and a conductive head is distributed on the insulating part, and the conductive head is connected to the conductive part to realize the conductive function, and the conductive part also plays the role of supporting the stent. After the stent is compressed, it 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, and the front handle is withdrawn along the booster tube to drive the outer tube to withdraw and release the stent, and the booster tube extends to the proximal end and is connected to the rear handle; The conductive part is made of metal material 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 realize 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 implanter according to claim 1, characterized in that: The conductive part is made of stainless steel.

5. The thermal puncture stent implanter 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 in a taper.

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

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

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

9. The thermal puncture stent implanter according to claim 1, characterized in that: The other end of the conductive head close to the outside completely covers the outer surface of the insulating portion. When the conductive head is used for cutting, the wound cutting surface is a circular surface.

10. The thermal puncture stent implanter according to claim 1, characterized in that: The outer surface of the conductive part is covered with a riveted tube, and 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, and is connected to the conductive part through the riveted tube to realize the conductive function.

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: A conductive seat is provided at the proximal end of the rear handle. A conductive plug is provided in the conductive seat. The conductive plug is connected to the conductive head through the conductive portion.

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