A thermal puncture stent inserter

Abstract

The present invention provides a thermal puncture stent introducer. The stent introducer has a proximal end and a distal end. An outer tube is provided at the distal end of the front handle and 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 inside the outer tube, and a conductive part is provided inside 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 boosting tube is provided between the proximal end of the outer tube and the insulating middle tube. The distal end of the boosting tube is connected to the proximal end of the insulating middle tube. An insulating part is provided at the distal end of the conductive part, and conductive heads are distributed on the insulating part. The conductive heads are connected to the conductive part to achieve the conductive function, and at the same time, the conductive part plays a role in 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. By retracting the front handle along the boosting tube, the outer tube is driven to retract to release the stent.

Description

Technical Field

[0001] The present invention relates to a thermal puncture inserter in the field of medical devices, and particularly to a thermal puncture stent inserter integrating cutting and injection functions. Technical Background

[0002] For the digestive tract-gallbladder anastomosis, an endoscopic thermal inserter punctures through the gastric wall or duodenal wall into the target position, i.e., the gallbladder, places the distal end of the fully covered double mushroom head stent in the gallbladder, and the proximal end of the mushroom head in the stomach or duodenum to open up a passage between the digestive tract and the gallbladder, that is, to create a new path between the digestive tract and the gallbladder. Then, through the gastroscope and the newly established passage, the gallstones in the gallbladder are removed using a stone extraction basket, thus realizing the endoscopic gallbladder-preserving lithotomy, providing a new treatment option for patients with gallbladder diseases who are not suitable for surgery, and also providing a treatment method for patients with good gallbladder function to retain their gallbladder function, improving the long-term quality of life of patients. For the gastric-pancreatic pseudocyst stent anastomosis, under endoscopy, a large-caliber fully covered double mushroom head stent is placed after puncturing through the stomach into the pancreatic pseudocyst of the patient, realizing the anastomosis between the stomach and the pancreatic pseudocyst, thereby fully draining the fluid and necrotic substances in the pancreatic pseudocyst.

[0003] For the duodenal-bile duct anastomosis, the traditional ERCP surgery inserts instruments such as a guide wire retrogradely from the duodenum through the ERCP endoscope into the duodenal papilla to reach the common bile duct for lithotripsy biopsy treatment, etc. For patients with difficult insertion of the guide wire, percutaneous puncture or surgical operation is usually required, which may reduce the quality of life of the patient or cause greater trauma.

[0004] For the gastroenteric anastomosis, when the passage for food in the stomach to enter the intestine is blocked by tumor invasion and the patient vomits incessantly, in the past, the patient either had to undergo laparotomy to establish a new gastroenteric passage or rely only on intravenous nutritional support. For those elderly patients or patients whose physical condition is no longer suitable for laparotomy, the quality of life is extremely low, and it also brings a heavy burden to the family. The gastroenteric anastomosis is to puncture through the stomach into the proximal small intestine under endoscopy and place a large-caliber fully covered double mushroom head stent to open up a passage between the stomach and the small intestine, that is, to create a new path between the stomach and the small intestine, thereby solving the impact of duodenal obstruction on the patient's life.

[0005] In the past, the construction of such a "bypass" required general anesthesia and laparotomy, which caused relatively large trauma. However, minimally invasive endoscopic surgery has the advantages of less trauma, shorter operation time, less pain, and faster recovery, fully demonstrating the advantages of endoscopic minimally invasive surgery. In recent years, with the continuous development and upgrading of endoscopic technology and various instrument accessories, the endoscope has played an increasingly important role in the diagnosis and treatment of various digestive system diseases. In particular, the continuous innovation of minimally invasive endoscopic treatment surgery has provided new minimally invasive treatment methods for many patients with gastrointestinal and biliary-pancreatic diseases who are unable or unwilling to undergo surgery. Currently, for the above four traditional surgeries, the stent usually has a double-mushroom head metal stent with a diameter of φ10 - φ16mm, and the outer diameter of the matching thermal inserter is φ3.5mm - φ3.6mm (10.5Fr - 10.8Fr). The traditional endoscopic ultrasound forceps channel has a diameter of φ3.7mm. Due to the too small gap, the traditional electrified inserter moves very uncomfortably back and forth in the endoscopic forceps channel, which is the main reason for the difficulty in carrying out the above surgeries. At the same time, 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 reaching relatively fewer places.

[0006] Therefore, in order to perform gastrobiliary anastomosis, gastroenteric anastomosis, and natural orifice transluminal endoscopic surgery (NOTES) through the gastroscope, it is necessary to design a smaller electrified inserter to pass through the gastroscope forceps channel and simplify the stent release steps, so as to release the stent more safely and quickly. The present invention provides a brand-new way to solve biliary obstruction, while saving operation time, surgical instruments, and reducing the surgical difficulty, making it possible for more doctors to carry out this surgery. Summary of the Invention

[0007] The thermal puncture stent inserter of the present invention cancels the traditional inner tube and conductive wire of the inserter and is replaced by a conductive component, which not only serves the purpose of supporting the stent but also has the function of transmitting high-frequency electricity. The outer diameter of the existing thermal puncture inserter can be reduced from 3.5mm - 3.6mm (10.5Fr - 10.8Fr) to 3.15mm (9.5Fr), enabling the thermal puncture inserter to pass through the traditional gastroscope forceps channel with a diameter of φ3.2mm, making it possible for doctors to perform more advanced digestive tract gallbladder anastomosis, duodenal bile duct anastomosis, gastric pancreatic pseudocyst stent anastomosis surgery, gastroenteric anastomosis, and NOTES surgery, etc.

[0008] Hereinafter, one end of the conductive head is defined as the distal end, and the end of the inserter connected to the external power supply is defined as the proximal end.

[0009] The thermal puncture stent introducer has a proximal end and a distal end. An outer tube is provided at the distal end of the front handle and 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 inside the outer tube and extends from the proximal end to the distal end. A conductive part is provided inside the insulating middle tube, and 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 boosting tube is provided between the proximal end of the outer tube and the insulating middle tube, and the distal end of the boosting 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. The distal end of the conductive part is provided with an insulating part, and conductive heads are distributed on the insulating part. The conductive heads are connected to the conductive part to achieve the conductive function. The stent is compressed and 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. By withdrawing the front handle along the boosting tube, the outer tube is driven to withdraw and release the stent. The conductive part not only plays a conductive role but also supports the stent. Compared with traditional stent implantors, it reduces the inner tube and guide wire, can conduct electricity at the same time, cut tissues, and release the stent after reaching the lesion location.

[0010] There is a certain gap between the insulating part and the conductive part. There is a conductive head at the distal end of the introducer. One end of the conductive head can extend from the distal end to the proximal end and enter the gap between the insulating part and the conductive part, so as to be connected to the conductive part to achieve the conductive function. The other end of the conductive head covers the outer surface of the insulating part.

[0011] Preferably, the conductive part is a hollow conductive part.

[0012] More preferably, the proximal end of the conductive part is connected to a Luer connector to realize liquid injection.

[0013] Preferably, the conductive part is a conductive wire.

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

[0015] Preferably, the conductive part is a metal material. More preferably, the conductive part is a stainless steel material.

[0016] Preferably, the material of the insulating part is ceramic.

[0017] 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 with a taper. The boosting tube extends proximally and is connected to the rear handle, and a positioning portion is provided between the front handle and the rear handle. On the outer surface of the conductive portion at a certain distance from the conductive head, a resistance portion is covered. 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 portion. The other end of the conductive head near the outside is completely covered on the outer surface of the insulating portion, and when cutting with the conductive head, the wound cutting surface is a circular surface. The outer surface of the conductive portion can be covered with a riveting tube, and one end of the conductive head can extend from the distal end to the proximal end into the gap between the insulating portion and the conductive portion, and is connected to the conductive portion through the riveting tube to achieve the conductive function.

[0018] Advantages:

[0019] The outer diameter of the thermal puncture stent of the present invention is smaller than the outer diameter of the stent introducer in the prior art, providing a new minimally invasive treatment method for many patients with gastrointestinal and biliary and pancreatic diseases who cannot or are unwilling to undergo surgery.

[0020] The thermal puncture introducer of the present invention can load a double-mushroom-head nitinol wire braided metal stent with a diameter of φ10mm - φ16mm into it, enter organs such as the stomach and duodenum through the 3.2mm conventional gastroscope forceps channel, the introducer is energized to puncture the gastric wall or intestinal wall, enter structures such as the small intestine, gallbladder, pancreatic cyst, and common bile duct, and precisely release the stent, and can anastomose the above tissues with the gastric wall or intestinal wall respectively to achieve functions such as drainage, gallbladder preservation, lithotripsy, and bypass opening. Description of the Drawings

[0021] Figure 1A It is a schematic cross-sectional view of the introducer

[0022] Figure 1B It is a schematic view of the distal structure of the cross-section of the introducer

[0023] Figure 2 It is a schematic overall view of the introducer product

[0024] Figure 3A When the conductive portion is a hollow conductive portion Figure 1B Schematic B-B cross-sectional view

[0025] Figure 3B When the conductive portion is a hollow conductive portion Figure 1B Schematic C-C cross-sectional view

[0026] Figure 4A When the conductive portion is a conductive wire Figure 1B Schematic B-B cross-sectional view

[0027] Figure 4B When the conductive portion is a conductive wire Figure 1B Schematic C-C cross-sectional view

[0028] Figure 5A is corresponding to Figure 3A and 3B the proximal tail structure sectional view of the stent introducer

[0029] Figure 5B is the partial enlarged view of 5A

[0030] Figure 6 is corresponding to Figure 4A and 4B the proximal tail structure sectional view of the stent introducer

[0031] Figures 7A - 7D is the distal schematic diagram of different types of introducers

[0032] Figures 8A - 8B is the distal schematic diagram of the integrated introducer

[0033] Figures 9A - 9B is the distal schematic diagram of the split-type introducer

[0034] Figures 10A - 10C is the distal schematic diagram of the flanged-type introducer

[0035] Figure 11 is the safety buckle schematic diagram

[0036] Figure 12 is the fully opened schematic diagram of the double mushroom stent

[0037] 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 seat, 33. Conductive plug, 34. Luer connector, 40. Distal tissue, 41. Proximal tissue, 42. Double mushroom head stent Specific implementation manners

[0038] In order to make the objectives, technical solutions and advantages of the present invention clearer, 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 used to limit the present invention.

[0039] Hereinafter, one end of the conductive head is defined as the distal end, and one end of the stent introducer connected to the external power supply is defined as the proximal end.

[0040] Such as Figure 1A , 1B and Figure 2As shown, the stent inserter of the present invention has a proximal end and a distal end. The stent inserter includes an outer tube 21, a boosting 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.

[0041] The outer tube 21 includes a proximal outer tube 211 and a distal outer tube 212. The proximal large outer tube 211 is disposed 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 a thread and can be installed in a threaded match with the proximal end of the front handle 30. An insulating middle tube 23 and a stent are provided inside the outer tube 21. The proximal end of the stent abuts against the distal end of the insulating middle tube 23. 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 boosting tube 22 is provided between the proximal outer tube 211 and the insulating middle tube 23. The boosting tube 22 can be made of stainless steel material. The distal end of the boosting tube 22 is connected to the proximal end of the insulating middle tube 23. Due to the taper design of the proximal outer tube 211 and the distal outer tube 212, the size of the distal outer tube 212 entering the lesion site is less than or equal to 3.15 mm. And a boosting tube 22 is provided between the proximal outer tube 211 and the insulating middle tube 23, thereby providing 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 boosting tube 22, enabling the operator to completely avoid the risk of electric shock. The boosting tube 22 extends proximally and is connected to the rear handle 31. A conductive seat 32 is provided at the proximal end of the rear handle 31. A conductive plug 33 is provided inside the conductive seat 32. The conductive plug 33 can be connected to the conductive head 11 through the conductive portion 13, thereby achieving power-on.

[0042] A positioning portion 27 can also be provided between the front handle 30 and the rear handle 31. The positioning portion 27 can be designed in the structure of a safety buckle 24, such as Figure 11 As shown, the positioning portion 27 is in the structure of a safety buckle 24. When releasing the stent, first loosen the safety lock 26, withdraw the front handle 30 proximally, and when it touches the safety buckle 24, the distal end of the stent is released in the distal tissue 40. Withdraw the stent inserter, lift the stent close to the proximal tissue, remove the safety buckle 24, and continue to withdraw the front handle 30 proximally to continue releasing the stent in the proximal tissue 41, thereby realizing the anastomotic connection of the distal tissue 40 and the proximal tissue 41 by the stent.

[0043] On the outer surface of the conductive portion 13 at a certain distance from the conductive head 11, a resistance portion 28 can be covered. The resistance portion 28 can give a certain resistance to the stent when the stent is released, making it not easy for the stent to slide outside the lesion.

[0044] The distal end of the stent inserter further includes a conductive head 11, an insulating portion 12, and a conductive portion 13. When the conductive plug 33 is externally 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 inserter to have an electrocision function for high-frequency cutting of human tissues. The conductive portion 13 can be any type of medical metal material, such as nitinol material or stainless steel material; 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 through the rear handle 31. The outer diameter size of the conductive portion 13 can be designed according to actual needs. In the present invention, through the design of the conductive portion 13, the outer diameter of the insertion portion of the existing thermal puncture stent inserter can be reduced from 3.5 mm to 3.6 mm (10.5 Fr to 10.8 Fr) to less than 3.2 mm (9 Fr), and preferably can be reduced to 3.15 mm (9.5 Fr). Additionally, the conductive portion 13 can be a hollow conductive portion to achieve the function of liquid injection and imaging, and the conductive portion 13 can also 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 B-B position of Figure 3A is shown as Figure 1B The cross-sectional view at the C-C position of Figure 3B is shown as Figure 5A is related to Figure 3A and 3B The corresponding cross-sectional view of the proximal tail structure of the stent inserter, Figure 5B is a partial enlarged view of 5A. There is a conductive plug 33 within the conductive seat 32. The conductive plug 33 can be connected to the conductive head 11 through the conductive portion 13 to achieve power-on; the proximal end of the conductive portion 13 is connected to the Luer connector 34. A doctor can connect a standard syringe to the Luer connector 34 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 inserter, and then is injected into the lesion position of the patient. The contrast agent is imaged under X-rays, marking the target position of the lesion for the doctor, and the doctor can prepare for the next step of stent release.

[0045] When the conductive portion 13 is designed as a conductive wire, the conductive wire can have different sizes according to requirements. Figure 1B The cross-sectional view at the B-B position of Figure 4A is shown as Figure 1B The cross-sectional view at the C-C position of Figure 4B is shown as Figure 6 is related to Figure 4A and 4BCross-sectional view of the proximal tail structure of the corresponding stent introducer. There is a conductive plug 33 inside the conductive seat 32, and the conductive plug 33 can be connected to the conductive head 11 through the conductive part 13, so as to achieve power-on.

[0046] The insulating part 12 is located at the distal end of the conductive part 13. 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, so as to be connected to 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 to the distal conductive head 11 of the stent introducer through the conductive part 13, so that the stent introducer has an electro-cutting function and can perform high-frequency cutting and puncture on human tissues. The insulating part 12 can be made of materials such as ceramics, which can prevent tissue adhesion and make cutting more convenient.

[0047] The conductive part 13 of the present invention replaces the inner tube and the conductive wire of the traditional stent introducer and has a conductive function. It replaces the original inner tube outer diameter of φ1.1mm and the conductive wire outer diameter of φ0.3mm with a conductive part 13 with a diameter less than φ0.4mm, reducing the total diameter by a space of φ1mm (reducing the space of 3Fr), enabling a conventional covered gastrointestinal stent (10mm - 16mm) to be loaded, and reducing the outer diameter of the original traditional thermal introducer from φ3.5mm - φ3.6mm (10.5Fr - 10.8Fr) to 3.15mm (9.5Fr), so that the electro-introducer can smoothly pass through the φ3.2mm gastroscope forceps channel.

[0048] The structure of the conductive head 11, the insulating part 12 and the conductive part 13 at the distal end of the stent introducer of the present invention can be as Figures 7A - 7D shown. The conductive head 11 can be composed of two or four conductive wires. One end of it can extend from the distal end to the proximal end into the gap between the insulating part 12 and the conductive part 13, so as to be connected to 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. The conductive head 11 can also have two or four conductive wires evenly distributed in the grooves on the outer surface of the insulating part 12 at the distal end to achieve the electro-cutting function. The adjacent conductive wires have the same angular interval in the grooves on the outer surface of the insulating part 12 and are radially distributed in a radial pattern on the outer surface of the insulating part 12.

[0049] As Figures 8A - 8B 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, so as to be connected to 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. At this time, when cutting with the conductive head 11, the cutting surface is a circular surface, rather than a straight incision, which is more conducive to hemostasis when using a hemostatic clip for hemostasis and is beneficial to wound healing.

[0050] AsFigures 9A - 9B As shown, the outer surface of the conductive part 13 can be covered with a riveting 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, and is connected to the conductive part 13 through the riveting tube 29 to achieve the conductive function. The riveting tube 29 can be made of stainless steel and can connect the conductive part 13 and the insulating part 12. As Figure 9A shown, the other end of the conductive head 11 can be completely covered on the outer surface of the insulating part 12. At this time, when cutting with the conductive head 11, the cutting surface is a circular surface instead of a straight incision, which is beneficial to wound healing.

[0051] As Figures 10A - 10C shown, the other end of the conductive head 11 can also be distributed in the groove on the surface of the insulating part 12 in the form of a conductive wire and wound around at the distal end of the stent introducer to form a one-word bevel conductive incision. At this time, when cutting tissue, the wound conductive wire and the conductive wire distributed in the groove are utilized. If there is no riveting tube 29, one end of the conductive head 11 is directly connected to the conductive part 13, and the other end of the conductive head 11 is distributed on the outer periphery of the insulating part 12, and the conductive function can also be achieved.

[0052] When the stent introducer of the present invention is in use, after connecting a high-frequency power supply 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 introducer has an electro-cutting function and can cut the diseased distal tissue 40. If the conductive part 13 is a hollow conductive part and is externally connected with a Luer connector, the stent introducer has a liquid injection function.

[0053] As Figure 12 shown, the double-mushroom head stent 42 is released through the thermal puncture stent introducer. 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.

[0054] The above are only the preferred embodiments of the present application, enabling those skilled in the art to understand or implement the invention of the present application. Various modifications and combinations of these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A thermal puncture stent introducer, characterized in that, The thermal puncture stent introducer has a proximal end and a distal end. 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. 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 inside the outer tube. The insulating middle tube and the conductive part extend from the proximal end to the distal end. The conductive part is provided inside the insulating middle tube and extends from the proximal end to the distal end. The proximal end of the conductive part can be connected to an external power source. A boosting tube is provided between the proximal end of the outer tube and the insulating middle tube. The distal end of the boosting 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. The distal end of the conductive part is provided with an insulating part. Conductive heads are distributed on the insulating part. The conductive heads are connected to the conductive part to achieve the conductive function. The conductive part also functions as a support for 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. By retracting the front handle along the boosting tube, the outer tube is driven to retract to release the stent. The boosting tube extends proximally and is connected to the rear handle. The conductive part is made of a 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 heads through the lumen of the conductive part.

2. The thermal puncture stent inserter according to claim 1, characterized in that, There is a certain gap between the insulating part and the conductive part. Conductive heads are provided at the distal end of the introducer. One end of the conductive head extends from the distal end to the proximal end and enters the gap between the insulating part and the conductive part, thereby connecting to 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 inserter according to claim 1, characterized in that, The proximal end of the conductive part is connected to a Luer connector to achieve liquid injection.

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

5. The thermal puncture stent inserter according to claim 1, characterized in that The outer tube includes a proximal outer tube and a distal outer tube. The proximal outer tube and the distal outer tube are connected with a taper.

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

8. The thermal puncture stent inserter according to claim 1, characterized in that, The conductive head is composed of two or four conductive wires. 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 introducer according to claim 1, wherein The other end of the conductive head close to the outside completely covers the outer surface of the insulating part. When cutting with the conductive head, the wound cutting surface is a circular surface.

10. The thermal puncture stent introducer according to claim 1, characterized in that, The outer surface of the conductive part is covered with a riveting tube. One end of the conductive head extends from the distal end to the proximal end and enters the gap between the insulating part and the conductive part, and is connected to the conductive part through the riveting tube to achieve the conductive function.

11. The thermal puncture stent introducer according to claim 1, characterized in that, The material of the insulating part is ceramic.

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