78results about How to "Lower surgery costs" patented technology

The invention relates to a zero-exchange balloon catheter stent system with a far-end protective umbrella and a using method, and belongs to the technical field of medical instruments. Comprising a balloon catheter and a stent system which are connected, the stent system comprises a conveying system and a stent; the conveying system comprises a control core wire; the center of the control core wire is provided with a connecting binding wire fixing hole and a connecting binding wire releasing point; the support comprises a near-end support, a connecting area and a far-end protective umbrella, and the connecting area is located between the near-end support and the far-end protective umbrella; the connecting area comprises a connecting binding wire, a protective umbrella wire binding ring and a protective umbrella connecting wire. The far-end protection umbrella and the near-end support are designed to be a separable combination, instrument exchange is not needed in the operation process, the operation process is simplified, the operation difficulty is reduced, the operation time is shortened, and therefore the risk of complications such as ischemic stroke is reduced.

The invention provides a visual catheter with perfusion and suction functions, the catheter comprises a catheter body and a camera shooting assembly, the catheter body comprises an operation part and an intubation tube from the near end to the far end, the camera shooting assembly comprises a camera installed at the head end of the intubation tube, and the operation part is connected with the camera shooting assembly. The operation part comprises an operation part shell, and a perfusion joint, a suction joint and an instrument inlet which are arranged on the operation part shell; a main channel extending in the longitudinal direction, at least one liquid drainage channel and at least one instrument channel allowing instruments to pass through are arranged in the cannula, and the main channel, the liquid drainage channel and the instrument channel are arranged in a separated mode.

The invention relates to the technical field of medical instruments, in particular to a reusable near-end anastomosis combined appliance which comprises an aorta puncher and a pusher, the aorta puncher comprises a puncher shell and a punching mechanism movably arranged in the puncher shell, the punching mechanism is connected with a reset mechanism, and the reset mechanism is connected with the pusher. The resetting mechanism is used for resetting the punching mechanism after the punching mechanism completes punching; the pusher comprises a pusher shell, a pushing pipe and a pushing mechanism, a sealing assembly is arranged in the pushing pipe, the pushing mechanism comprises a pushing state and a reset state, in the pushing state, the pushing mechanism pushes the sealing assembly in the pushing pipe, and in the reset state, the pushing mechanism recovers to the initial state. According to the reusable near-end anastomosis combined appliance, the aorta hole puncher and the pusher can be repeatedly used for punching and sealing a plurality of coronary artery anastomotic stomas only by replacing the sealing assembly for a patient needing to bypass a plurality of coronary blood vessels, and the operation cost is greatly saved.

The invention relates to an embolism microcatheter with a detachable head end and a method, and belongs to the technical field of cerebrovascular malformation surgical instruments. The embolism micro-catheter with the outer tube, the inner tube and the weak blocking part is arranged to serve as a catheter appliance for the cerebral vascular deformity operation, fluid is injected into the bypass tube of the outer tube to break the weak blocking part so as to achieve disengagement and separation of the embolism micro-catheter, and therefore the situation that the micro-catheter adheres to the cerebral vessels can be avoided; meanwhile, the microcatheter can be effectively released, the releasing condition can be observed through an instrument of the pressure pump, the efficiency of the cerebrovascular malformation operation is improved, and the operation cost is reduced.

The utility model provides an auxiliary positioning lighting device for a jaw osteomyelitis operation, belongs to the technical field of jaw osteomyelitis operation equipment, and solves the technical problems that a doctor needs to spend a long time in judging the position and boundary of a jaw osteomyelitis focus in the operation process, the operation view is not clear, lighting is difficult and the like. The device comprises a positioning guide plate, the positioning guide plate comprises a tooth socket and a wound covering plate, a connecting plate is integrally formed between the tooth socket and the wound covering plate, a sliding groove is formed in the rear end of the connecting plate, a sliding block is connected in the sliding groove in a sliding mode, a bolt is fixed to the upper position of the rear end of the sliding block, and a long groove used for sliding of the bolt is formed in the connecting plate. A connecting mechanism is arranged at the lower position of the rear end of the sliding block, and a supporting mechanism is arranged on the connecting mechanism. The device has the advantages that the nidus of jaw osteomyelitis is positioned in real time, illumination of the operation field is kept, illumination does not need to be continuously adjusted after the position of the head of a patient is adjusted in the operation process, operation wounds are reduced, operation efficiency is improved, and the like.

The utility model relates to a novel biological electrocoagulation and electroresection snare device for a pedicle in a urinary cavity, which is used for effectively improving the operation safety and preventing normal tissues from being damaged by resection operation, and the operation is simple, more convenient and more flexible. Comprising an operating handle, an upper sliding block, a lower sliding block, a first metal wire and a second metal wire, the operating handle is provided with a longitudinal cavity penetrating through the front end of the operating handle, and the upper sliding block and the lower sliding block are installed on the operating handle through a longitudinal sliding structure. Main bodies of the first metal wire and the second metal wire are located in the longitudinal cavity, and the rear ends of the first metal wire and the second metal wire are fixedly connected with the lower sliding block and the upper sliding block respectively; the front end of the first metal wire is bent and then welded with a first metal wire body to form a restraint ring, and the first metal wire body penetrates through the restraint ring to form an electrocoagulation and electroresection snare outside the front end face of the operating handle; and the front end of the second metal wire is welded with the first metal wire body at a position adjacent to the restraint ring.

The utility model relates to a portable surgical robot which comprises an X shaft, a Y shaft, a Z shaft, a navigation device and a main control device, the X shaft, the Y shaft and the Z shaft are connected to a mechanical arm base through a mounting base, the X shaft, the Y shaft and the Z shaft are matched with one another to control the spatial orientation of a tail end device of the portable surgical robot, the X shaft comprises at least one adjusting mechanism parallel to the X shaft, and the main control device is connected with the navigation device. The Y shaft comprises at least one adjusting mechanism parallel to the Y shaft, the Z shaft comprises at least one adjusting mechanism parallel to the Z shaft, and the main control device is connected with the X shaft, the Y shaft and the Z shaft. By means of the technical scheme, the size of the adjusting device can be reduced, and meanwhile accurate adjustment of the tail end device is achieved in the X-axis direction, the Y-axis direction and the Z-axis direction.

The invention belongs to the technical field of medical instruments, and discloses a full-suture anchor assembling device, a full-suture anchor implanting device and an assembling method.The full-suture anchor assembling device comprises a clamping piece and a guiding piece, the clamping piece is provided with a clamping groove for containing an anchor body, and the guiding piece is arranged at an opening of the clamping groove and comprises two oppositely-arranged clamping pieces; the guide piece can be inserted into the fixing groove, the two clamping pieces can be far away from each other to form a guide channel, the two ends of the guide channel are communicated with the clamping groove and the fixing groove respectively, and the nail body can be clamped in the fixing groove through the guide channel. The full-suture anchor implanting device comprises an implanting rod and an operation assembly, the implanting rod can be movably and detachably connected to the operation assembly along the axis of the implanting rod, the fixing groove is formed in the end, away from the operation assembly, of the implanting rod, and the two traction lines at the two ends of the anchor body are both connected to the operation assembly. According to the assembling method, the rivet body is not damaged in the assembling process of the full-suture rivet, and the full-suture rivet implanting device is repeatedly used.

The invention provides an intracavity gas self-circulation filtering device for laparoscopic surgery, which comprises a first filtering part (1) provided with a first filtering part gas inlet (102) and a first filtering part gas outlet (103), and the first filtering part gas inlet is communicated with the abdominal cavity of a human body; the power part (2) is connected with the first filtering part and is provided with a power part air inlet (203) and a power part air outlet (202), the power part air inlet is communicated with the first filtering part through the first filtering part air outlet, and the power part air outlet is communicated with the human body abdominal cavity; a housing (5) having an opening and an internal space communicating with the outside and accommodating the first filter part and the power part in the internal space; and the at least one second filtering part (1005) is communicated with at least one of the first filtering part air inlet and the power part air outlet. The technical scheme provided by the invention has the advantages of avoiding pollution and being high in durability.

The invention belongs to the technical field of medical auxiliary instruments, and particularly relates to a bone repair fixing and bundling device and application thereof and application of magnesium wires as bone repair products, the bone repair fixing and bundling device comprises a bundling belt and a fixing buckle, the bundling belt is formed by at least one magnesium wire, the fixing buckle and the magnesium wires are made of degradable pure magnesium, and the magnesium wires are made of degradable pure magnesium. The strapping tape surrounds a target bone, and the two ends of the strapping tape are tightened and fixed in the fixing buckles; the diameter of each magnesium wire ranges from 0.5 mm to 1.5 mm. The binding device is applied to internal fixation or auxiliary internal fixation of traumatic bone fractures and is combined with an external cortical bone bridge to be applied to bone tumor repair and fixation, and the degradation product in the magnesium degradation process is used for inhibiting tumor recurrence and promoting osteogenesis to promote formation of the external cortical bone bridge. Therefore, the magnesium wire has a great application prospect as a bone repair product.

The invention provides a bionic 3D printing degradable magnesium alloy interbody fusion cage and a preparation method thereof, the bionic 3D printing degradable magnesium alloy interbody fusion cage comprises a porous frame and a through hole net rack, the porous frame is constructed by supporting rods with the diameter of about 0.4 mm, the porous frame is of a compact rhombic hole structure, the aperture is about 200-400 microns, the pore coverage rate is about 50%-80%, and a horseshoe-shaped columnar space is defined; the through-hole net rack is formed by building supporting rods with the diameter of 0.2-0.1 mm, the hole diameter is about 300-800 microns, the hole coverage rate is about 90%, a dome structure is formed in the center, and the through-hole net rack is arranged in the middle of the porous frame. The magnesium-strontium alloy is adopted as a base material of the interbody fusion cage, the interbody fusion cage is integrally formed through the 3D printing technology, and the degradable characteristic and good biocompatibility of the magnesium alloy are fully utilized. The elasticity modulus of the magnesium alloy is closer to that of the human bone tissue, physiological loads can be better shared and transmitted, the stress shielding effect is reduced, and growth and fusion of the bone tissue are promoted.

The utility model provides a kind of pulling device for endoscopic surgery, it includes connecting piece, and multiple pulling rings fixed on the connecting piece, multiple the pulling ring is sequentially spaced along the length direction of the connecting piece, and the intersection of adjacent two the pulling ring and the included angle is 72 °-120 °;The material of the connecting piece is inelastic material, and the material of the pulling ring is elastic material.The pulling ring of the present application is suitable for endoscopic dissection surgery, cooperates tissue clamp, according to different needs, pulls open mucosa, improves surgical field of view, and the number of tissue clamp can be reduced, the operation time is reduced, and the operation cost is saved.

The application discloses a novel end device of a surgical robot system, which comprises a parent control module and a child tool module detachably installed on the parent control module; a plurality of positioning holes are arranged on the end face of the parent control module towards the child tool module; a plurality of positioning pillars for identifying the model of a surgical tool are arranged on the end face of the child tool module towards the parent control module; when the plurality of positioning pillars on the child tool module are inserted into the plurality of positioning holes on the parent control module, the parent control module identifies the model of the surgical tool of the child tool module by judging the layout style and / or length of the inserted positioning pillars. The end device of the application can be installed on the mechanical arm of the surgical robot to realize intelligent identification.

The present invention provides a rotator cuff repair positioner under shoulder arthroscopy, comprising a flat suture needle guide component and a suture needle positioning component, wherein the suture needle guide component is provided with a plurality of needle entry holes at different angles along its length direction, and the needle entry holes all pass through the center line of the suture needle guide component, and one end of the suture needle guide component is provided with a slot fixed to the suture needle positioning component, and the suture needle positioning component is divided into a vertical part and a horizontal part perpendicular to each other, wherein the vertical part is a handle, and is fixedly connected to the slot of the suture needle guide component, and the free end of the horizontal part is provided with a suture needle positioning hole, and the suture needle is positioned in the suture needle positioning hole after passing through the needle entry hole on the suture needle guide component. The positioner can help the surgical operator establish a reasonable and accurate operation approach, and is more helpful for the operator to accurately and quickly complete the repair and suturing of the rotator cuff tear, thereby obtaining the best surgical effect.

The utility model discloses a negative pressure suction adapter, which relates to the technical field of medical instruments, and comprises a connector main body, the bottom surface of the connector main body is detachably connected with a main interface, the top end of the connector main body is detachably connected with a side interface, and the side surface of the connector main body is fixedly communicated with an interface. According to the negative pressure suction adapter for the surgery, the interface and the side interface are arranged, and the other interface can be sealed when only one interface is applied to the negative pressure suction adapter for the surgery, so that the negative pressure suction adapter is convenient to use, saves the instrument switching frequency of medical personnel in the surgery process, reduces the infection risk of an incision of a patient, and is high in practicability.

This invention relates to a detachable microcatheter and method for embolization, belonging to the technical field of surgical instruments for cerebrovascular malformations. The invention comprises an embolization microcatheter with an outer tube, an inner tube, and a weak occlusion as a catheter device for cerebrovascular malformation surgery. Fluid is injected into the bypass tube of the outer tube to break the weak occlusion, thereby achieving detachment of the embolization microcatheter. This avoids adhesion between the microcatheter and cerebral blood vessels, and allows for effective detachment of the microcatheter, with the detachment status monitored by a pressure pump. This improves the efficiency of cerebrovascular malformation surgery and reduces surgical costs.

The invention discloses a semi-automatic puncture device based on an ultrasonic image. The semi-automatic puncture device comprises a puncture support, an ultrasonic detection device, a control module, a puncture needle and a pushing mechanism. The puncture support is provided with a vertical part, a transverse part and an inclined part, the vertical part is vertically arranged at one end of the transverse part, and the inclined part is obliquely arranged at the other end of the transverse part by 45 degrees. The ultrasonic detection device is arranged on the vertical part and is used for acquiring an ultrasonic image of the arm of the patient in real time. The control module is arranged on the top face of the inclined part, the pushing mechanism and the puncture needle are both arranged on the bottom face of the inclined part, and the pushing mechanism is used for pushing the puncture needle to conduct telescopic puncture along the inclined part. After the central axis of the ultrasonic image is aligned with the artery of the patient, the control module triggers the pushing mechanism to push the puncture needle to advance by 45 degrees so as to perform puncture. The puncture accuracy and safety can be improved, and the operation cost and the medical risk are reduced.

The grasping type supporting tractor under the laparoscope comprises a puncture assembly and a clamp assembly, and the puncture assembly comprises a puncture outer pin and a puncture inner core penetrating through the puncture outer pin in a sliding mode; a positioning groove is formed in the inner side of the top of the puncture outer pin, the top of a clamp tube of the clamp assembly is matched in the positioning groove, and the outer portion of the clamp tube is matched with the inner portion of the puncture outer pin in a sliding mode. An elastic buckle is arranged on one side of the top of the forceps tube, a limiting ring is arranged on the outer side of the top of the puncture outer pin, and the elastic buckle is clamped on the limiting ring. According to the grasping type supporting tractor under the laparoscope, suture lines are omitted, so that the operation cost of a patient is reduced; the puncture assembly and the clamp assembly are combined for use through the elastic buckle, the positioning groove, the limiting ring and other structures, so that the retractor can be fixed without being held by a surgeon, an assistant does not need to occupy an operation channel, and the retractor can better assist the surgeon to conduct other surgical operations.

The utility model relates to the technical field of medical equipment, and provides a laser medical device. The laser medical device comprises a laser oscillation module, a mode selection module and an optical fiber coupling module. The laser oscillation module is used for generating laser; the mode selection module is in signal connection with the laser oscillation module and is used for adjusting the laser oscillation module, so that the laser oscillation module at least operates in a continuous operation mode, a quasi-continuous operation mode, a continuous Q-switching operation mode, a quasi-continuous same-frequency Q-switching operation mode or a quasi-continuous difference-frequency Q-switching operation mode; and the optical fiber coupling module is connected with an outlet of the laser oscillation module and is used for coupling the laser and the indication light. The laser medical device overcomes the defects that a thulium-doped laser in the prior art is relatively single in working mode and has limitation when dealing with various operation requirements, can achieve free switching of various modes, enables medical staff to deal with various conditions to carry out operations without replacing equipment, and improves the working efficiency of the laser medical device. And the operation efficiency is greatly improved.

According to the open endoscope, the design scheme that the main body and the endoscope body are of the bent connecting structure is provided, so that a good and wide visual field is provided for a doctor in a pipeline of a working sleeve, and meanwhile, the occupied hand operation space is effectively reduced; therefore, the purposes of improving operation flexibility, reducing work intensity of doctors and improving operation efficiency are achieved. The open endoscope comprises an endoscope body and a main body which are connected with each other, internal pipelines of the endoscope body and the main body are communicated, and an included angle of 80-100 degrees is formed at the joint of the endoscope body and the main body.

The hysteroscope comprises a handheld part and an insertion part connected with the handheld part, the insertion part comprises an insertion tube, and the insertion tube comprises an insertion tube body, a positioning plate, an elastic piece and a lens assembly arranged on the insertion tube body; an instrument channel extending in the axial direction of the insertion tube is formed in the insertion tube, the instrument channel comprises a first tube section and a second tube section which are communicated with each other, the first tube section is formed in the insertion tube body, the second tube section is jointly formed by the insertion tube body and the positioning plate, and at least part of the lens assembly is located in the radial direction of the second tube section; the near end of the positioning plate is rotatably connected to the cannula body, and the far end of the positioning plate is connected with the cannula body through an elastic piece. The device can be suitable for various surgical instruments of different models, the surgical cost is reduced, the surgical process is simplified, and the risk of secondary injury to a patient is avoided.

The utility model discloses an aspiration biopsy needle which comprises a handle, a biopsy needle head and an ultrasonic probe, and an assembly hole channel is formed in the handle. The biopsy needle head is connected with the handle and is inserted into the assembling hole channel; a central hole channel is formed in the biopsy needle in the axial direction; the central hole channel is communicated with the assembly hole channel to form a sampling channel; the ultrasonic probe is detachably arranged in the sampling channel and is used for extending to the front of the biopsy needle so as to observe the position to be sampled. By inserting the ultrasonic probe into the biopsy needle head for observation, the positioning precision of a position to be sampled can be improved, so that after the ultrasonic probe is taken out, accurate sampling can be performed, the sampling precision of the needle biopsy needle is improved, the sampling frequency is reduced, the assembly damage is reduced, and the safety of an operation is improved.

The utility model discloses a kind of in-body stripping cutting systems, comprising: stripping device, stripping device includes stripping head, at least part of stripping head is arranged in arc, at least part of stripping head is abutted to the outside of in-body target stripping object, by moving stripping head, target stripping object outside is separated from adjacent tissue;Cutting device, cutting device is provided with cutting mechanism, the distal end of cutting mechanism abuts the boundary of target stripping object distal end, operates cutting mechanism, realizes target stripping object distal end and adjacent tissue separation.The utility model can visualize stripping target stripping object, fully strips out to ensure surgical efficacy, reduce surgical trauma, reduce surgical cost, and can shorten the hospitalization recovery period of patient, in addition, without using artificial blood vessel, can reduce the probability of postoperative complication, applicable to narrow or blocked lumen cleaning, especially applicable to lumen old thrombus or larger deposit, and long-implanted stent in lumen and the removal of other foreign bodies.

The invention provides a multi-track interventional consumable delivery device and a vascular interventional surgical robot, and belongs to the technical field of medical instruments, the multi-track interventional consumable delivery device at least comprises: a first delivery track on which a first consumable box and a second consumable box are slidably arranged; the second delivery track and the first delivery track are arranged in parallel, and a third consumable box and a fourth consumable box are arranged on the second delivery track in a sliding mode; the first consumable box is connected with the operation end of the first intervention consumable and can drive the second intervention consumable to act, the second consumable box is connected with the operation end of the second intervention consumable, and the third consumable box can drive the third intervention consumable to act; the fourth consumable box is connected with the operation end of the third intervention consumable; and the second intervention consumable and the third intervention consumable can penetrate into the first intervention consumable. According to the invention, the consumable replacement requirement and the multi-instrument cooperative treatment requirement in the interventional operation process can be met at the same time, so that more types of operations can be supported, and the diversity of operation types is improved.

The utility model provides an abutment with a locking structure, which comprises a dental crown mounting part and a locking mechanism, the locking mechanism comprises an upper part, a middle part, a lower part and a bottom part which are fixedly connected in sequence, a dental crown matching surface is formed at the top end of the upper part, the upper part is also provided with an upper thread connected with the dental crown mounting part, the lower part is provided with a lower thread connected with an implant, and the locking mechanism is connected with the dental crown mounting part. The upper threads and the lower threads are different in specification. According to the abutment with the locking structure, the strength of a locking position is higher after the dental crown is installed, the stress of the dental crown is uniformly dispersed on a matching surface, the long-term stability in the mouth of a patient can be improved, and looseness is avoided; the long-term stability of the product is improved, maintenance and replacement in the use process are facilitated, the operation convenience of medical staff is remarkably improved, and the pain of a patient and the operation cost are reduced.

The utility model provides a bone grafting guide device visible under an endoscope, which comprises a bone grafting funnel, a hollow rod fixedly connected to the lower end of the bone grafting funnel and a bone grafting bar inserted into the hollow rod in a matched manner, and a handle is arranged at the upper end of the bone grafting bar; the hollow rod is a transparent hollow rod; a through hole communicated with the hollow rod is formed in the bottom wall of the bone grafting funnel, a cover plate capable of being opened and closed is arranged at the upper end of the through hole, and scale marks are arranged on the inner wall of the bone grafting funnel. The condition in the hollow rod can be conveniently observed under an endoscope, so that a doctor can conveniently observe the bone grafting process and the depth and the position of aggregate, and the doctor can better control the movement of the aggregate and the depth of a bone grafting bar; according to the bone grafting device, the aggregate dosage can be visually checked, recording is convenient, the aggregate does not need to be metered in other containers in advance, the problem that the aggregate is attached to the inner walls of other measuring tools and materials are not used accurately is effectively solved, other measuring tools do not need to be additionally cleaned, the operation cost is saved, and meanwhile the bone grafting efficiency is improved.

This invention discloses a pressure-adjustable extravascular occlusion balloon with drainage and flushing function, relating to the field of vascular hemostasis technology. It includes a tubing wall with a C-shaped front end. Several balloons that can compress each other are arranged inside the C-shaped tube. A balloon catheter is inserted through the tubing wall, with one end connected to the balloon and the other end extending out from the rear end of the tubing wall. This invention can quickly control massive bleeding, achieving hemostasis without causing permanent loss of blood supply to the controlled blood vessel, thus avoiding related complications caused by ischemia.

The application provides a handle assembly and a medical catheter system, and relates to the technical field of medical devices. The handle assembly comprises a connecting module with a catheter channel inside; at least one end of the catheter channel is provided with an opening, and at least part of the inner wall of the catheter channel is provided with a sealing part for abutting and sealing with an object inserted into the inside of the catheter channel. The handle assembly can be inserted by the catheter channel and the opening of the connecting module, so as to realize the detachable connection between the handle assembly and the medical catheter, and the sealing part can ensure the sealing of the connection between the medical catheter and the handle assembly, so that the medical catheter can be directly retained while the guide channel is withdrawn after the operation by the operation of separating the medical catheter from the handle assembly, and the complicated instrument exchange operation is not needed, so that the operation convenience, the operation safety and the operation efficiency are effectively improved.

The utility model relates to a saddle type endoscopic surgery hole towel with a storage bag. The saddle type endoscopic surgery hole towel comprises a surgery hole towel body, a first hole towel piece and a second hole towel piece. The first hole towel piece and the second hole towel piece are combined to form the operation hole towel main body with a double-layer structure. Due to the design, the durability and the stability of the operation hole towel are enhanced, and pollution and cross infection in the operation process are effectively prevented. Meanwhile, the double-layer structure also increases the water and bloodstain absorbing capacity of the surgical hole towel, so that the surgical process is cleaner and safer, the accommodating groove not only can store large surgical instruments such as an ultrasonic knife and an electric knife, but also can resist high temperature and corrosion, and the problem that a hole is perforated due to the fact that the knife head is hot is avoided. Compared with a disposable film storage bag, the cloth simple substance storage groove is more durable and practical, and can meet the requirement of long-time operation. Meanwhile, due to the design, the operation cost is reduced, and the repeated utilization rate of the operation hole towel is improved.

The present disclosure provides a thermal ablation catheter with a thermocouple, comprising: a thermocouple temperature measuring end, which is in a sandwich structure, including a first electrode, a second electrode and a sandwich weld, wherein the free ends of the first electrode and the second electrode face oppositely and are parallel to each other and close to each other, and are conductively connected through the sandwich weld; a liner, which is a hollow structure for accommodating a thermal ablation component, and the thermocouple temperature measuring end is arranged on the outer circumferential surface of the liner; a heating resistance wire, which is wound around the outer circumference of the liner in a helical shape; wherein the thermocouple temperature measuring end is arranged on the liner between two adjacent turns of the heating resistance wire, the outer surface of the thermocouple temperature measuring end and the outer surface of the heating resistance wire are on the same circumferential surface, the first electrode, the second electrode and the heating resistance wire are arranged in parallel, the thermocouple temperature measuring end is centrally symmetrical, and the first electrode and the adjacent thermal resistance wires, the second electrode and the adjacent thermal resistance wires are centrally symmetrical about the center point of the thermocouple temperature measuring end.