Electrically-controlled bending-adjustable nerve intervention guide wire device

Abstract

The invention relates to an electrically-controlled bending-adjustable nerve intervention guide wire device which comprises a handle, a reducing core tube, an electroactive polymerization wire, a conductive wire and a guide sleeve, the reducing core tube is of a hollow tubular structure, the near end of the reducing core tube is installed in the handle, the far end of the reducing core tube freely extends, one end of the electroactive polymerization wire in the length direction is connected with the reducing core tube, and the other end of the electroactive polymerization wire freely extends; the conductive wire is suitable for being electrically connected with a battery pack, the conductive wire penetrates through the near end of the variable-diameter core tube and penetrates out of the side wall of the far end of the variable-diameter core tube, the conductive wire is wound outside the electroactive polymerization wire to regulate and control the temperature of the electroactive polymerization wire, and the guide sleeve is arranged outside the variable-diameter core tube, the electroactive polymerization wire and the conductive wire in a sleeving mode. After the conductive wire is electrified and heated, the temperature of the electroactive polymerization wire is regulated and controlled, so that the electroactive polymerization wire is bent or straightened, and the problem that the expected bending angle cannot be reached due to friction between the core wire and the inner wall of the guide wire after multiple parts of the guide wire are bent is solved, so that the problem that the bending angle of the far end is not in place due to the bending of the middle section of the guide wire is solved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an electrically controlled and adjustable neural intervention guidewire device. Background Art

[0002] Intracranial aneurysms will compress nerve tissues before they rupture. Aneurysms in different locations will cause corresponding pathological symptoms. For example, compression of the optic nerve will cause dark shadows in the visual field, which may even lead to blindness. Subarachnoid hemorrhage caused by aneurysm rupture will cause a stroke. The current treatments for intracranial aneurysms are divided into surgical clipping and interventional treatment. Considering that elderly patients heal slowly after craniotomy, interventional treatment methods are often used. Interventional treatment devices are further divided into auxiliary stents, auxiliary coil packing, blood flow guidance device treatment, and braided packing. The current method used to deform the tip of the guidewire is to use mechanical force to deform it into an arc. The operator will use auxiliary devices to change the arc of the distal end of the guidewire, which usually requires the help of finger force, thereby extending the operation time and increasing the operation process. Summary of the invention

[0003] In view of this, the present application proposes an electrically controlled and adjustable bending neurointervention guidewire device, which is convenient for adjusting the distal bending of the guidewire.

[0004] According to one aspect of the present application, there is provided an electrically controlled adjustable bend neural intervention guidewire device, comprising:

[0005] handle;

[0006] The reducer core tube is a hollow tubular structure, the proximal end of the reducer core tube is installed in the handle, and the distal end is freely extended;

[0007] An electroactive polymeric filament, one end of which is connected to the variable diameter core tube in the length direction and the other end of which is freely extended;

[0008] Conductive wire, suitable for electrically connecting the battery pack, the conductive wire passes through the proximal end of the variable diameter core tube, passes through the distal side wall of the variable diameter core tube, and the conductive wire is wound around the outside of the electroactive polymer wire to regulate the temperature of the electroactive polymer wire;

[0009] The guide sleeve is sleeved on the outside of the variable diameter core tube, the electroactive polymeric wire and the conductive wire.

[0010] In a possible implementation, the conductive wire is uniformly spirally wound outside the electroactive polymer wire.

[0011] In a possible implementation manner, the electroactive polymeric wire is connected to the conductive wire by laser welding or riveting.

[0012] In a possible implementation, along the axial direction of the variable diameter core tube, the cross-section of the conductive wire wound by the bolt is annular.

[0013] In a possible implementation, the cross-section of the electroactive polymeric filament is circular, rectangular or semicircular.

[0014] In a possible implementation, the guide sleeve includes: a spring guide sleeve;

[0015] The spring guide sleeve has a spiral structure;

[0016] The inner diameter of the spring guide sleeve matches the outer portion of the variable diameter core tube;

[0017] The spring sleeve is sleeved on the outside of the variable diameter core tube, the electroactive polymeric wire and the conductive wire.

[0018] In a possible implementation, the proximal end of the guide sleeve abuts against the distal end of the handle.

[0019] In a possible implementation, the variable diameter core tube has more than one variable diameter section in its axial direction.

[0020] In a possible implementation, the outside of the variable diameter core tube is coated with a PTFE coating.

[0021] In a possible implementation manner, the surface of the conductive thread is coated with a hydrophilic coating.

[0022] In one possible implementation, the electroactive polymer wire is a nickel-titanium wire.

[0023] In a possible implementation, a conductive through hole is opened at the distal end of the variable diameter core tube, the diameter of the conductive through hole matches the diameter of the conductive wire, and the conductive wire passes through the conductive through hole and is wound around the outside of the electroactive polymer wire.

[0024] In a possible implementation manner, the conductive wire is a developing ring.

[0025] In a possible implementation, the distal end cross-section of the handle is circular, matching the cross-sectional diameter of the conductive wire.

[0026] In a possible implementation, the diameter of the distal cross-section of the conductive filament is equal to the diameter of the proximal cross-section of the electroactive polymer filament.

[0027] The beneficial effects of the electrically controlled adjustable bend neurointervention guidewire device of the embodiment of the present application are as follows: the conductive wire sleeved on the outside of the electroactive polymer wire is passed through an electric current, and after the conductive wire is energized and heated, the temperature of the electroactive polymer wire is adjusted to bend or straighten the electroactive polymer wire, so that the front end of the device will not be affected by the length. Specifically, the bending purpose is achieved by electrically controlling the state of the wire. Compared with the traditional adjustable bend guidewire that uses mechanical pulling of the core wire, this design will not fail to reach the expected bending angle due to friction between the core wire and the inner wall of the guidewire after the guidewire has been bent in multiple places. Therefore, the guidewire will not have the problem of the distal bending angle not being in place due to the bending of the middle section. .

[0028] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0030] Figure 1 A schematic diagram showing the main structure of the electrically controlled adjustable bendable nerve intervention guidewire device according to an embodiment of the present application;

[0031] Figure 2 A schematic cross-sectional view of a spring-shaped outer wall guide wire according to an embodiment of the present application is shown;

[0032] Figure 3 A cross-sectional schematic diagram of a nickel-titanium tube outer wall type guide wire with grooves according to an embodiment of the present application is shown;

[0033] Figure 4 A cross-sectional view of a reduced diameter core wire and a nickel-titanium wire according to an embodiment of the present application is shown;

[0034] Figure 5 The internal structure diagram of the guidewire according to the embodiment of the present application is shown;

[0035] Figure 6 A schematic diagram of a nickel-titanium tube outer wall guide wire with grooves according to an embodiment of the present application is shown;

[0036] Figure 7 A schematic diagram of a spring-shaped outer wall guide wire according to an embodiment of the present application is shown;

[0037] Figure 8 A circuit connection diagram of the electrically controlled adjustable bend neurointervention guidewire device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0038] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0039] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0042] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0043] like Figure 1 As shown, the electrically controlled adjustable bend neurointervention guidewire device of an embodiment of the present application comprises: a handle 7, a reducing core tube 3, an electroactive polymeric wire 2, a conductive wire 1 and a guide sleeve, wherein the reducing core tube 3 is a hollow tubular structure, the proximal end of the reducing core tube 3 is installed in the handle 7, and the distal end is freely extended, one end of the electroactive polymeric wire 2 in the length direction is connected to the reducing core tube 3, and the other end is freely extended, the conductive wire 1 is suitable for electrically connecting to a battery pack 74, the conductive wire 1 passes through the proximal end of the reducing core tube 3, and passes through the distal side wall of the reducing core tube 3, and the conductive wire 1 is wound around the outside of the electroactive polymeric wire 2 to regulate the temperature of the electroactive polymeric wire 2, and the guide sleeve is sleeved on the outside of the reducing core tube 3, the electroactive polymeric wire 2 and the conductive wire 1.

[0044] In this embodiment, the conductive wire 1 sleeved on the outside of the electroactive polymer wire 2 is passed with current. After the conductive wire 1 is energized and heated, the temperature of the electroactive polymer wire 2 is adjusted to make the electroactive polymer wire 2 bend or straighten, so that the front end of the device will not be affected by the length. Specifically, the bending purpose is achieved by changing the state of the wire material by electric control. Compared with the traditional adjustable bending guide wire using the core wire mechanical pulling, the obvious advantage of this design is that the guide wire will not be unable to reach the expected bending angle due to friction between the core wire and the inner wall of the guide wire after multiple bends. Therefore, the guide wire will not cause the problem of inadequate bending angle at the distal end due to bending in the middle section.

[0045] Among them, the handle 7 serves as the operation center of the entire device, which is convenient for medical staff to hold it firmly and accurately control it. It integrates a control switch and an interface for connecting to an external power supply. The proximal end of the variable diameter core tube 3 is firmly installed inside the handle 7, and its distal end is freely extended to provide flexible guidance and support for the guide wire. The electroactive polymer wire 2 is a special alloy material with excellent shape memory effect and superelasticity. It can automatically adjust its shape under temperature changes to achieve the bending and recovery of the guide wire, so that it can easily pass through complex vascular paths and accurately reach the lesion site. As a component of the temperature control system, the conductive wire 1 passes through the proximal end of the variable diameter core tube 3 and passes through its distal side wall, and then is tightly wound around the outside of the electroactive polymer wire 2. By connecting to the external battery pack 74, the conductive wire 1 can transfer electrical energy to the electroactive polymer wire 2, thereby generating heat and accurately regulating the temperature of the electroactive polymer wire 2. The guide sleeve serves as a protective layer and an isolation layer. The guide sleeve is tightly mounted on the outside of the variable diameter core tube 3, the electroactive polymer wire 2 and the conductive wire 1, which effectively prevents friction and wear between the components, ensures the sealing and insulation of the entire device, and further improves the safety of the operation.

[0046] It should be noted that, in the present application, the conductive wire 1 is electrified to generate heat, thereby heating the active polymer wire 2 coated by the conductive wire 1, so that the active polymer wire 2 is bent or restored.

[0047] In a specific embodiment, the conductive wire 1 is evenly spirally wound around the outside of the electroactive polymeric wire 2, maximizing the contact area between the conductive wire 1 and the electroactive polymeric wire 2, thereby improving the efficiency of heat transfer. When the conductive wire 1 is energized to generate heat, the heat can be quickly and evenly distributed to the electroactive polymeric wire 2, so that it meets the preset temperature control requirements. In addition, the spiral winding method allows the conductive wire 1 to be evenly wound around the outside of the nickel-iron wire. When the conductive wire 1 is energized, the wound electroactive polymeric wire 2 can be heated. Since the nickel-titanium can be evenly heated, the electroactive polymeric wire 2 can be heated, bent or restored as a whole.

[0048] In this embodiment, the uniform spiral winding also gives the entire device higher structural stability and durability. The close fit between the conductive wire 1 and the electroactive polymer wire 2 reduces the relative sliding and wear caused by movement or vibration, thereby extending the service life of the device.

[0049] In this embodiment, the spirally wound conductive wire 1 is used to facilitate the bending and recovery of the electroactive polymeric wire 2 after being heated. Specifically, the spiral winding allows the conductive wire 1 in the axial direction to have a gap between adjacent circumferential parts, which facilitates the bending and recovery of the electroactive polymeric wire 2.

[0050] In a specific embodiment, the electroactive polymeric filament 2 is laser welded or riveted to the conductive filament 1. Regardless of laser welding or riveting, these two technologies can effectively achieve a stable connection between the electroactive polymeric filament 2 and the conductive filament 1, meeting the performance requirements in different application scenarios.

[0051] Moreover, the conductive wire 1 and the electroactive polymer wire 2 are fixed by laser welding or riveting. Since the conductive wire 1 is spirally sleeved on the outside of the electroactive polymer wire 2, after the conductive wire 1 and the electroactive polymer wire 2 are fixed, even if the electroactive polymer wire 2 is completely broken, it will not affect the fixation of the electroactive polymer wire 2 and the conductive wire 1.

[0052] In a specific embodiment, the connection method between the electroactive polymeric wire 2 and the variable diameter core wire includes bonding, laser welding, sleeve connection and other connection methods.

[0053] In a specific embodiment, the material of the distal end portion of the conductive wire 1 may include but is not limited to precious metal alloy materials such as platinum-iridium, platinum-tungsten, etc., and metal materials such as gold and silver.

[0054] In a specific embodiment, along the axial direction of the variable diameter core tube 3, the cross section of the conductive wire 1 wound by bolts is annular, and the conductive wire 1 is a developing ring. The cross section of the conductive wire 1 is annular, and the annular cross section not only increases the contact area between the conductive wire 1 and the surrounding environment, which is conducive to the uniform distribution and transmission of current, but also enhances its mechanical strength, so that the conductive wire 1 can still maintain stable conductive performance when subjected to various stresses and deformations. The conductive wire 1 with a ring-shaped cross section can play a role in developing or enhancing the display effect to enhance the effect of image details.

[0055] Moreover, the cross section of the electroactive polymeric filament 2 can also be circular, rectangular or semicircular. The electroactive polymeric filament 2 with a circular cross section makes the electroactive polymeric filament 2 have uniform mechanical properties and thermal conductivity in all directions, which is conducive to achieving uniform deformation and recovery. The electroactive polymeric filament 2 with a rectangular cross section has higher rigidity and load-bearing capacity, and can resist larger bending and torsion force because it has a larger cross-sectional size in a specific direction. The electroactive polymeric filament 2 with a semicircular cross section combines some characteristics of a circle and a rectangle, has certain rigidity and load-bearing capacity, and can achieve uniform deformation and recovery to a certain extent.

[0056] In this embodiment, the conductive through hole opened at the far end of the variable diameter core tube 3 allows the conductive wire 1 to pass through and be wound around the outside of the electroactive polymer wire 2, thereby ensuring the reliability of the electrical connection.

[0057] In a specific embodiment, the guide sleeve includes: a spring guide sleeve, the spring guide sleeve has a spiral structure, the inner diameter of which matches the outside of the variable diameter core tube 3, and the spring sleeve is arranged outside the variable diameter core tube 3, the electroactive polymer wire 2 and the conductive wire 1. The conductor of the spring-shaped structure ensures that the guide sleeve can firmly wrap and guide the variable diameter core tube 3, and also allows the two to maintain a certain flexibility and adaptability in relative movement. The spring guide sleeve can closely fit the changing shape of the variable diameter core tube 3, ensuring the stability and reliability of the entire system, not only providing the necessary protection and support, but also ensuring that they can function stably.

[0058] In another specific embodiment, the guide sleeve includes: a keyway guide sleeve, which is a tubular structure, and a keyway is provided on the outer wall, and the keyway is arranged along the axial direction of the keyway conductor, so as to improve the flexibility of the keyway guide sleeve. Specifically, the keyway is provided on the keyway guide sleeve not only for the consideration of structural strength and positioning accuracy, but also significantly improves its flexibility. The presence of the keyway allows the keyway guide sleeve to bend and deform more smoothly when subjected to external force, so that it can more easily pass through or adapt to various irregular spaces and shapes, such as the vascular network in the human body. Among them, a plurality of keyways are provided, which are spaced from one end of the keyway guide sleeve in the length direction to the other end of the keyway guide sleeve in the length direction, and the spacing between adjacent keyways on the keyway guide sleeve follows a specific mathematical relationship.

[0059] In a specific embodiment, the reducing core tube 3 has more than one reducing section in its axial direction, and the reducing core tube 3 is divided into one or more reducing sections in its axial direction, and the diameter of each reducing section is different from that of its adjacent section. This change in diameter can be gradual or sudden, and the number, position and size of the reducing section can be changed. In addition, the multi-section reducing design of the reducing core tube 3 also enhances its structural flexibility and adaptability. Segments of different diameters can bear different loads and stresses respectively, thereby optimizing the strength and rigidity of the overall structure.

[0060] In this embodiment, due to the different circumferential diameters of each section of the reducing core tube 3, different functions are played at different positions. Among them, the proximal end of the reducing core tube 3 is embedded in the handle 7, and the distal end is freely extended, so the proximal end of the reducing core tube 3 is used to be fixed with the handle 7, and the distal end is connected to the electroactive polymeric filament 2, and different functions can be played by the different circumferential diameters. The circumferential diameter of the proximal end of the reducing core tube 3 is larger than the diameter of the distal end of the reducing core tube 3, which can improve the stability and firmness of the proximal end of the reducing core tube 3, and the circumferential diameter of the reducing core tube 3 is smaller than the diameter of the proximal end of the reducing core tube 3, which can improve the flexibility of the distal end of the reducing core tube 3, and facilitate bending or recovery in a circuitous blood vessel.

[0061] In a specific embodiment, the outer surface of the reducing core tube 3 is coated with a PTFE coating, which helps to reduce resistance during surgery. In addition, the corrosion resistance, wear resistance, insulation and easy cleaning of the reducing core tube 3 are improved, and the reducing core tube 3 is ensured to be used stably and efficiently in a circuitous blood vessel.

[0062] In a specific embodiment, the electroactive polymer can be a nickel titanium wire, which can automatically bend or restore its original shape according to the change of temperature. In this way, when the conductive wire 1 is wrapped around the outside of the nickel titanium wire, the conductive wire 1 is powered and the temperature rises, which will cause the nickel titanium wire to bend and change, and when the conductive wire 1 is powered off, the nickel titanium wire will restore.

[0063] In a specific embodiment, the distal end of the handle 7 body is tapered, which facilitates the doctor's manipulation of the handle 7 and ensures the stability of the guide wire during the operation.

[0064] In this embodiment, the distal cross-section of the handle 7 is circular, matching the cross-sectional diameter of the conductive wire 1, and the distal cross-sectional diameter of the conductive wire 1 is equal to the proximal cross-sectional diameter of the electroactive polymer wire 2, thereby reducing the gap between the inner wall of the distal opening of the handle 7 and the outer wall of the reducing core tube 3, thereby ensuring the connection stability between the reducing core tube 3 and the handle 7.

[0065] In a specific embodiment, the handle 7 includes: a handle body, a sliding rheostat 75, a battery pack 74, a current fuse 72, a nickel-titanium wire 76, a control chip 73 and a temperature sensor 71, which are used to turn on and control the magnitude of the current, and then to regulate the bending degree and recovery of the nickel-titanium wire.

[0066] In this embodiment, the sliding rheostat 75, the nickel-titanium wire 76, the battery pack 74 and the control chip 73 are sequentially connected in series to form a closed circuit, and the temperature sensor 71, the nickel-titanium wire 76 and the control chip 73 are sequentially connected in series to form a closed circuit. The nickel-titanium wire 76 is connected in series with the sliding rheostat 75. By adjusting the resistance of the sliding rheostat 75, the current passing through the nickel-titanium wire 76 is adjusted, and then the temperature of the nickel-titanium wire 76 during adjustment can be obtained. Since the nickel-titanium wire 76 and the nickel-titanium wire are made of the same material, the temperature of the nickel-titanium wire 76 at this time can be obtained by connecting the nickel-titanium wire 76 in series with the temperature sensor 71, and then the temperature of the nickel-titanium wire and the bending condition of the nickel-titanium wire can be obtained. Specifically, the sliding rheostat 75, the nickel-titanium wire 76, the battery pack 74 and the control chip 73 form a closed-loop control circuit, and the temperature sensor 71, the nickel-titanium wire 76 and the control chip 73 are connected in series to monitor and feedback the temperature state of the nickel-titanium wire 76 in real time. The nickel-titanium wire 76 and the sliding rheostat 75 are directly connected in series in the circuit provided by the battery pack 74. The current flowing through the nickel-titanium wire 76 can be accurately controlled by adjusting the resistance of the sliding rheostat 75. The change in current will directly cause the change in the temperature of the wire itself. The nickel-titanium wire 76 is made of the same material as the nickel-titanium wire, and will show similar temperature change characteristics under the same current and environment. Therefore, a temperature sensor 71 is connected in series to the nickel-titanium wire 76. The sensor can capture and convert the temperature information of the nickel-titanium wire 76 into electrical signals in real time, and then transmit these signals to the control chip 73 for processing. The control chip 73 is responsible for receiving temperature data from the temperature sensor 71 to correct the degree of bending, which greatly improves the overall response speed and adjustment accuracy. The degree of bending can be directly seen by the doctor under DSA, allowing the doctor to control the nickel-titanium wire more flexibly and accurately in complex medical operations.

[0067] In this embodiment, the temperature of the nickel-titanium wire 76 is the same as the temperature of the nickel-titanium wire, and the temperature information is transmitted to the control chip 73. The doctor adjusts the sliding rheostat 75 according to the degree of tortuosity of the blood vessels and the degree of curvature of the nickel-titanium wire.

[0068] Among them, in this embodiment, it should be noted that the current passing through the electroactive polymer wire 2 is changed by the proximal handle 7, so that the electroactive polymer wire 2 heats up and the nickel-titanium wire contracts, thereby changing its length to achieve the purpose of bending the guide wire. Through the selection and control of the phase change temperature of the electroactive polymer wire 2, its phase change temperature should be higher than the normal temperature of the human body and lower than the safe temperature of the human body. When the electroactive polymer wire 2 is a nickel-titanium wire, it can be learned from the reference that the phase change temperature of the shrinkable TiNi material includes 20-40°C, 45-90°C, and 5-15°C. In theory, the temperature of the electroactive polymer wire 2 can be controlled by adjusting the current, so that the shrinkage of the electroactive polymer wire 2 can be controlled. Therefore, the detection of temperature is particularly important. The temperature of the nickel-titanium wire is calculated theoretically and the temperature sensor 71 is used to measure the data to form a closed-loop feedback control current in real time. The theoretical heat generation can be obtained by the power formula: W=I^2RT (I is the current, R is the resistance of the nickel-titanium wire, and T is the time). Since the guidewire is too small, the temperature sensor 71 cannot be installed at the far end of the guidewire, so a proportionally shortened nickel-titanium wire of the same type is placed in the handle 7, and the same current is passed through it to replace the far end to monitor the temperature change in real time. According to the formula of thermal energy Q=CM△t and power, the current value at a given temperature and a given time can be obtained, and the actual measured temperature can be obtained by applying the current to the nickel-titanium wire. When the measured temperature is higher than the given temperature, the control current is automatically reduced to ensure that the actual temperature is dynamically close to the given temperature, and the guidewire returns to its original state by relying on its own heat dissipation and cooling.

[0069] In this embodiment, the sliding rheostat 75 , the battery pack 74 , the current fuse 72 , the nickel-titanium wire 76 , the control chip 73 and the temperature sensor 71 are all arranged inside the main body of the handle 7 .

[0070] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An electrically controlled and adjustable neural intervention guidewire device, characterized in that: include: handle; The reducer core tube is a hollow tubular structure, the proximal end of the reducer core tube is installed in the handle, and the distal end is freely extended; An electroactive polymeric filament, one end of which is connected to the variable diameter core tube in the length direction and the other end of which is freely extended; Conductive wire, the conductive wire passes through the proximal end of the variable diameter core tube, passes through the distal side wall of the variable diameter core tube, and the conductive wire is wound around the outside of the electroactive polymer wire; the conductive wire can control the temperature of the electroactive polymer wire by connecting to a power source; The guide sleeve is sleeved on the outside of the variable diameter core tube, the electroactive polymeric wire and the conductive wire.

2. The electrically controlled adjustable bend nerve intervention guidewire device according to claim 1, characterized in that: The conductive wire is uniformly spirally wound outside the electroactive polymer wire.

3. The electrically controlled adjustable bend nerve intervention guidewire device according to claim 2, characterized in that: The electroactive polymeric wire is connected to the conductive wire by laser welding or riveting.

4. The electrically controlled adjustable bend nerve intervention guidewire device according to claim 2, characterized in that: Along the axial direction of the variable diameter core tube, the cross-section of the conductive wire wound by the bolt is annular.

5. The electrically controlled adjustable bend nerve intervention guidewire device according to claim 1, characterized in that: The cross section of the electroactive polymeric filament is circular, rectangular or semicircular.

6. The electrically controlled adjustable bendable nerve intervention guidewire device according to any one of claims 1 to 5, characterized in that: The guide sleeve is a spring guide sleeve; The spring guide sleeve has a spiral structure; The inner diameter of the spring guide sleeve matches the outer portion of the variable diameter core tube; The spring sleeve is sleeved on the outside of the variable diameter core tube, the electroactive polymeric wire and the conductive wire.

7. The electrically controlled adjustable bendable nerve intervention guidewire device according to any one of claims 1 to 5, characterized in that: The proximal end of the guide sleeve abuts against the distal end of the handle.

8. The electrically controlled adjustable bendable nerve intervention guidewire device according to any one of claims 1 to 5, characterized in that: The reducing core tube has more than one reducing section in its axial direction.

9. The electrically controlled adjustable bendable nerve intervention guidewire device according to claim 8, characterized in that: The outer portion of the reduced diameter core tube is coated with a PTFE coating.

10. The electrically controlled and adjustable neural intervention guidewire device according to claim 1, characterized in that: The surface of the conductive thread is coated with a hydrophilic coating.

11. The electrically controlled and adjustable neural intervention guidewire device according to claim 1, characterized in that: The electroactive polymeric wire is a nickel-titanium wire.

12. The electrically controlled and adjustable neural intervention guidewire device according to claim 1, characterized in that: A conductive through hole is opened at the distal end of the variable diameter core tube, the diameter of the conductive through hole matches the diameter of the conductive wire, and the conductive wire passes through the conductive through hole and is wound around the outside of the electroactive polymer wire.

13. The electrically controlled and adjustable neural intervention guidewire device according to claim 4, characterized in that: The conductive wire is a developing ring.

14. The electrically controlled and adjustable neural intervention guidewire device according to claim 1, characterized in that: The distal end section of the handle is circular and matches the cross-sectional diameter of the conductive wire.

15. The electrically controlled and adjustable neural intervention guidewire device according to claim 1, characterized in that: The diameter of the distal cross-section of the conductive filament is equal to the diameter of the proximal cross-section of the electroactive polymeric filament.

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