Multi-electrode nerve electrical stimulation electrode catheter

Abstract

The invention discloses a multi-pole nerve electrical stimulation electrode catheter, and relates to the technical field of medical instruments, the multi-pole nerve electrical stimulation electrode catheter comprises a catheter body, an elastic piece, a guide wire and an electrode assembly, the catheter body is provided with a first end and a second end which are opposite, the catheter body is provided with a first channel, and the first channel extends from the first end to the second end; a closed structure is arranged at the port of the first end of the first channel; the elastic piece comprises a shaping section and has an initial state, in the initial state, the shaping section of the elastic piece is spiral in the plane, and the elastic piece is arranged in the first channel; the guide wire movably penetrates through the first channel, the guide wire can move to a limiting position or a non-limiting position, the guide wire can keep the catheter body in a linear state at the limiting position, and the elastic piece can drive the first end to be bent in a plane to be in a spiral shape at the non-limiting position; the electrode assembly is arranged on the outer side wall of the catheter body. According to the multi-pole nerve electrical stimulation electrode catheter, the opportunity of contact between the electrode and nervous tissue can be improved, and the position of the catheter is easy to fix.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a multi-polar nerve electrical stimulation electrode catheter. Background Art

[0002] Nerve regulation can be applied to various types of diseases such as pain, epilepsy, Parkinson's disease, mental diseases, angina pectoris, irritable bowel syndrome, and peripheral neurovascular lesions. The peripheral nerve electrical stimulation technology is one of the nerve regulation technologies, which uses implantable technology and adopts electrical stimulation signals to change the activity of peripheral nerves, thereby improving the symptoms of patients with chronic pain.

[0003] Currently, the peripheral nerve electrical stimulation electrodes used clinically are usually implanted through a puncture needle. The tip of the electrode is close to the target nerve tissue. After adjusting the position of the electrode to obtain the best stimulation effect, the electrode is fixed. The electrode is usually sutured and fixed by relying on the skin surface or the superficial subcutaneous fascia tissue structure. When the patient moves the limb and the muscles contract repeatedly, it is easy to cause the position of the electrode to change. Even a slight position change may lead to a decrease in the electrical stimulation efficiency. When the electrode displacement is severe, it will directly cause the electrode to fall out and completely fail.

[0004] In addition, the existing electrical stimulation electrodes are basically conductive metal ring structures, and multiple stranded metal wires need to be welded to the metal ring. During processing, it is necessary to consider both whether the welding between the metal wire and the metal ring is firm and the treatment of the raised solder joints or burrs after welding to avoid damage to human tissues. Therefore, the processing process of the existing electrical stimulation electrodes is more complex and the manufacturing cost is higher. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a multi-polar nerve electrical stimulation electrode catheter, which can increase the chance of contact between the electrode and the nerve tissue and is easy to fix the position of the catheter.

[0006] The multi-polar nerve electrical stimulation electrode catheter according to an embodiment of the present invention includes a flexible catheter body, the catheter body having opposite first and second ends, the catheter body being provided with a first channel extending from the first end to the second end, and a closed structure being provided at the port of the first channel at the first end; An elastic member, the elastic member including a shaping section, the elastic member having an initial state, in which the shaping section of the elastic member is bent in a plane, the elastic member being disposed in the first channel, and the shaping section of the elastic member being located at the first end; A rigid guide wire that movably passes through the first channel. The guide wire can move within the first channel to a restricted position or an unrestricted position. At the restricted position, the guide wire can keep the catheter body in a straight state. At the unrestricted position, the elastic member can drive the first end to bend into a spiral shape in a plane. An electrode assembly disposed on the outer sidewall of the catheter body.

[0007] The multi-pole nerve electrostimulation electrode catheter according to an embodiment of the present invention has at least the following beneficial effects: The catheter body is a flexible structure, and the catheter body can be driven by the deformation of the elastic member to change the structure of the catheter body; the elastic member is configured such that the central axis is spiral, that is, the elastic member can change the first end of the catheter body into a spiral structure. In a plane, the straight catheter body becomes spiral, increasing the projected area in the plane. Therefore, the catheter body is more difficult to displace in the tissue; the guide wire is rigid and movably passes through the first channel. When the guide wire is in the first channel, the guide wire can prevent the elastic member from deforming, that is, both the catheter body and the elastic member remain in a straight state, facilitating the puncture and implantation of the catheter body into the target tissue area; the electrode assembly is used to contact the peripheral nerve and change the activity of the peripheral nerve using electrical stimulation signals.

[0008] According to some embodiments of the present invention, the electrode assembly includes a first electrode body and a second electrode body. The first electrode body is disposed on the outer sidewall of the first end, the second electrode body is disposed on the outer sidewall of the second end, and the first electrode body and the second electrode body are electrically connected.

[0009] According to some embodiments of the present invention, a circumferential first electrode wire is disposed on the outer sidewall of the first end. The first electrode wire is wound into a spiral structure to form the first electrode body. A circumferential second electrode wire is disposed on the outer sidewall of the second end. The second electrode wire is wound into a spiral structure to form the second electrode body. The first electrode body and the second electrode body are an integral structure.

[0010] According to some embodiments of the present invention, the catheter body is provided with a second channel. A conductive wire is disposed inside the second channel. The conductive wire connects the first electrode body and the second electrode body. The second channel is isolated from the first channel.

[0011] According to some embodiments of the present invention, the electrode assembly includes a plurality of the first electrode bodies and a plurality of the second electrode bodies. Among them, a plurality of the first electrode bodies are spaced apart along the length direction of the catheter body, and a plurality of the second electrode bodies are spaced apart along the length direction of the catheter body.

[0012] According to some embodiments of the present invention, the catheter body is provided with a plurality of the second channels, and each of the second channels is provided with a conductive wire, and one conductive wire connects the first electrode body and the second electrode body of the same electrode assembly.

[0013] According to some embodiments of the present invention, the plurality of second channels are uniformly distributed circumferentially around the first channel.

[0014] According to some embodiments of the present invention, the catheter body is provided with a plurality of liquid outlet holes, and the plurality of liquid outlet holes are all communicated with the first channel, and the plurality of liquid outlet holes all penetrate through the outer wall of the first end.

[0015] According to some embodiments of the present invention, the catheter body is provided with a visualization part, and the visualization part is located at the port of the first end and forms the closed structure.

[0016] According to some embodiments of the present invention, the side of the visualization part away from the second end is the head, and the head is arc-shaped.

[0017] According to some embodiments of the present invention, the shaping section of the elastic member is bent into a spiral shape in a plane.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following further describes the present invention in conjunction with the drawings and embodiments, wherein: Figure 1 is a schematic structural diagram of a multi-polar nerve electrical stimulation electrode catheter according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of the second end of a multi-polar nerve electrical stimulation electrode catheter according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of the first end of a multi-polar nerve electrical stimulation electrode catheter according to an embodiment of the present invention; Figure 4 is a schematic diagram of a multi-polar nerve electrical stimulation electrode catheter bent into a spiral structure according to an embodiment of the present invention.

[0020] Reference numerals in the drawings: Catheter body 100, first channel 110, second channel 120, visualization part 130, elastic member 200, guide wire 300, electrode assembly 400, first electrode body 410, second electrode body 420. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0022] In the description of the present invention, it should be understood that with respect to the orientation description, such as up, down, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0023] In the description of the present invention, "plural" means more than two. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, words such as "arrangement", "installation", "connection", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0025] As described in the background art, when the position of the electrode changes, even a slight position change may lead to a decrease in the efficiency of electrical stimulation. When the electrode displacement is severe, it will directly cause the electrode to come out and completely fail. Therefore, in some electrode structures, in order to prevent the electrode from shifting, a "barbed" silicone structure is also provided to prevent the electrode from coming out through this silicone structure. However, after the electrical stimulation is completed, the above silicone structure will hinder the removal of the electrode.

[0026] Referring Figure 1 and Figure 2 As shown, a multi-polar nerve electrical stimulation electrode catheter according to an embodiment of the present invention includes a flexible catheter body 100, a pre-shaped elastic member 200, a rigid guide wire 300, and an electrode assembly 400.

[0027] The catheter body 100 has opposite first and second ends. It should be understood that in Figure 1The portion between the first end and the second end of the catheter body 100 is not shown. The catheter body 100 is provided with a first channel 110 that extends from the first end of the catheter body 100 to the second end. A closed structure is provided at the port of the first channel 110 located at the first end of the catheter body 100. The catheter body 100 is made of a flexible material, making the catheter body 100 easy to deform and bend. For example, any one of silicone, polyurethane (PU), and thermoplastic polyurethane (TPU) can be used to make the flexible catheter body 100.

[0028] It should be understood that the first end of the catheter body 100 is used to puncture and implant into human tissue to reach the peripheral nerve, where the peripheral nerve includes but is not limited to dorsal root ganglion, spinal nerve root, peripheral nerve trunk, and peripheral nerve branch. The second end of the catheter body 100 is generally outside the human tissue and is used to connect to other devices or for the operator to hold.

[0029] It should be understood that the elastic member 200 can be made of a spring tube with a shape memory metal function, and the elastic member 200 is pre-shaped to form a shaped section on the elastic member 200. The elastic member 200 after pre-shaping is in an initial state. When the elastic member 200 is in the initial state, the shaped section of the elastic member 200 is bent in a plane, and this is also the initial state after the elastic member 200 is pre-shaped, that is, the state presented by the elastic member 200 when not subjected to external forces or restrictions. Preferably, the shaped section of the elastic member 200 is bent in a plane in a spiral shape. When the elastic member 200 is deformed by an external force and the external force is removed, the elastic member 200 will return to the initial state. In the embodiments of the present application, in certain cases, the elastic member 200 needs to be restricted so that the elastic member 200 is in a straight state.

[0030] The elastic member 200 is disposed in the first channel 110 of the catheter body 100, and it is ensured that the shaped section of the elastic member 200 is at the first end of the catheter body 100.

[0031] The guide wire 300 is movably inserted through the first channel 110. The guide wire 300 can move to a restricted position or a non-restricted position within the first channel 110. At the restricted position, the guide wire 300 can keep the catheter body 100 in a straight state. At the non-restricted position, the elastic member 200 can drive the first end of the catheter body 100 to bend in a plane in a spiral shape. The electrode assembly 400 is disposed on the outer sidewall of the catheter body 100.

[0032] The elastic member 200 is arranged in the first channel 110, and the rigid guide wire 300 is inserted into the first channel 110. Since the straight guide wire 300 is rigid, the guide wire 300 can limit the bending deformation of the catheter body 100. When the catheter body 100 cannot bend, the elastic member 200 in the first channel 110 cannot bend either, and remains in a straight line, that is, the guide wire 300 also limits the elastic member 200 arranged in the first channel 110 to a straight state, and maintains it in a straight state. Further, when the elastic member 200 is a spring tube or a similar structure, the guide wire 300 can also penetrate the center of the elastic member 200. In this assembly structure, the guide wire 300 is also arranged in the first channel 110. In this assembly structure, the guide wire 300 directly limits the elastic member 200 to be in a straight state, and can also maintain the catheter body 100 in a straight state.

[0033] When the guide wire 300 is inserted into the first channel 110, the catheter body 100 is first in a straight state under the restriction of the guide wire 300. At this time, the catheter body 100 can be operated to puncture into the human tissue until the electrode assembly 400 reaches the peripheral nerve.

[0034] It should be understood that the guide wire 300 can also serve as an auxiliary tool to guide the movement of the catheter body 100 , and the force applied to the guide wire 300 can be transmitted to the catheter body 100 through the closed structure located at the first end of the catheter body 100 , thereby pushing the catheter body 100 forward.

[0035] After the catheter body 100 is implanted, the guide wire 300 is taken out from the first channel 110. At this time, the elastic member 200 is no longer restricted by the guide wire 300, and the elastic member 200 begins to recover to the initial state, that is, the elastic member 200 drives the catheter body 100 to form a spiral structure together, for example Figure 4 The structure shown makes it easy for the catheter body 100 and the electrode assembly 400 to be fixed in human tissue, thereby reducing the risk of displacement of the electrode assembly 400.

[0036] The first end of the catheter body 100 is formed into a spiral shape, and the spiral shape here mainly refers to a spiral in a plane. For example, along the direction from the second end of the catheter body 100 toward the first end, the catheter body 100 gradually spirals inward. In the plane, the straight-line catheter body 100 becomes a spiral shape, which increases the area of ​​the projection in the plane. Specifically, along the puncture direction, the first end of the catheter body 100 has more contact points with the tissue, so the catheter body 100 is more difficult to shift and dislodge in the tissue, and the catheter body 100 is easier to be fixed.

[0037] The electrode assembly 400 is connected to an external pulse generator, and electrical stimulation can be applied to the peripheral nerves through the electrode assembly 400 .

[0038] It should be understood that after the electrostimulation treatment is completed, when the guide wire 300 is inserted into the first channel 110, the catheter body 100 can return to a straight state, facilitating the removal of the catheter body 100 from the human tissue.

[0039] It should be understood that even if the local muscle tissue movement of the patient occurs repeatedly, the spiral catheter body 100 has more space for extension and retraction, playing a certain fixing role.

[0040] It can be understood that the electrode assembly 400 includes a first electrode body 410 and a second electrode body 420. The first electrode body 410 is disposed on the outer sidewall of the first end, and the second electrode body 420 is disposed on the outer sidewall of the second end. The first electrode body 410 and the second electrode body 420 are electrically connected.

[0041] The first electrode body 410 is disposed at the first end of the catheter body 100. The first electrode body 410 is implanted together with the first end to the peripheral nerve for generating electrostimulation to the peripheral nerve. The second electrode body 420 is disposed at the second end of the catheter body 100. The second end is outside the human tissue. The second electrode body 420 is used to externally connect a power supply device, such as a pulse generator. The second electrode body 420 is disposed on the outer sidewall of the second end, which is more conducive to connecting with the pulse generator.

[0042] It can be understood that a surrounding first electrode wire is disposed on the outer sidewall of the first end. The first electrode wire is wound into a spiral structure to form the first electrode body 410. A surrounding second electrode wire is disposed on the outer sidewall of the second end. The second electrode wire is wound into a spiral structure to form the second electrode body 420. The first electrode wire and the second electrode wire are of an integral structure.

[0043] The first electrode wire wound around the outer sidewall of the first end can form the first electrode body 410. This structure is easier to process and the processing technology is simple. Compared with the traditional welding of a metal ring and a metal wire, directly winding the first electrode wire to form the first electrode body 410 does not require welding processing, nor does it need to consider dealing with the protrusions or burrs generated after welding, which can save the processing process and reduce the processing cost. Similarly, the second electrode body 420 is also formed by winding the second electrode wire around the outer sidewall of the second end. It should be understood that the first electrode wire and the second electrode wire are of an integral structure, such as a single metal wire, with one end called the first electrode wire and the other end called the second electrode wire. Generally, both the first electrode wire and the second electrode wire are made of platinum-iridium metal or other precious metal materials. The spiral structure formed by the above winding can reduce the production and manufacturing cost, and at the same time increase the contact area between the first electrode body 410 and the peripheral nerve, improving the electrostimulation effect.

[0044] It can be understood that the catheter body 100 is provided with a second channel 120. Inside the second channel 120, there is a conductive wire which connects the first electrode body 410 and the second electrode body 420. The second channel 120 is isolated from the first channel 110.

[0045] The conductive wire is arranged inside the second channel 120 and is isolated from the first channel 110, reducing the risk of damaging the conductive wire during the deformation of the elastic member 200. Similarly, it can also reduce the risk of damaging the conductive wire during the movement of the guide wire 300.

[0046] It should be understood that in the integrated structure of the first electrode wire and the second electrode wire, platinum-iridium metal is used for manufacturing. One end of the metal wire is called the first electrode wire and is directly wound to form the first electrode body 410. The other end of the metal wire is called the second electrode wire and is directly wound to form the second electrode body 420. The part between the first electrode wire and the second electrode wire is the conductive wire.

[0047] It can be understood that the electrode assembly 400 includes a plurality of first electrode bodies 410 and a plurality of second electrode bodies 420. Among them, a corresponding connected first electrode body 410 and a second electrode body 420 form a group. Usually, the electrode assembly 400 is provided with 2 to 16 groups of first electrode bodies 410 and second electrode bodies 420.

[0048] Preferably, the combination of the first electrode body 410 and the second electrode body 420 has 4 groups or 8 groups. That is, the first electrode body 410 has 4 or 8, and the second electrode body 420 synchronously has 4 or 8. The conductive wires between each group of the first electrode body 410 and the second electrode body 420 are independent of those of other groups. The plurality of first electrode bodies 410 can increase the possibility of contacting the peripheral nerve and more easily reach the position with the best electrical stimulation effect. It should be understood that after the catheter body 100 forms a helix, the plurality of first electrode bodies 410 are more concentrated, and the probability of the first electrode body 410 being in the position with the best electrical stimulation effect increases.

[0049] It can be understood that the plurality of first electrode bodies 410 are spaced apart along the length direction of the catheter body 100, and the plurality of second electrode bodies 420 are spaced apart along the length direction of the catheter body 100.

[0050] The first electrode body 410 and the second electrode body 420 are both distributed at intervals along the length direction of the catheter body 100, which is easy to control so that there is no interference between each first electrode body 410, and it is also easy to control so that there is no interference between each second electrode body 420, forming multiple independent electrode assemblies 400. It should be understood that the interval distance between the multiple first electrode bodies 410 should be reasonably adjusted so that after the catheter body 100 forms a helix, the first electrode bodies 410 on adjacent inner and outer circles intersect with each other, and contact conduction between the first electrode bodies 410 is avoided as much as possible.

[0051] It can be understood that the catheter body 100 is provided with a plurality of second channels 120, and a conductive wire is arranged in each second channel 120, and the conductive wire connects a group of the first electrode body 410 and the second electrode body 420.

[0052] Each conductive wire can also be separated by a plurality of second channels 120.

[0053] It can be understood that the plurality of second channels 120 are evenly distributed circumferentially around the first channel 110, so that the bending moment of inertia coefficients of the catheter body 100 in all directions are similar, avoiding the elastic member 200 deforming towards the side with a lower bending moment of inertia coefficient of the catheter body 100 during spiral bending, resulting in uncontrollable bending of the catheter body 100. After the elastic member 200 undergoes pre-shaping treatment, its bending direction can be determined. After the elastic member 200 is assembled with the catheter body 100, if the bending moment of inertia coefficients of the catheter body 100 in all directions are similar or the same, the bending direction of the elastic member 200 driving the catheter body 100 can be determined and marked. When the catheter body 100 enters the tissue, the bending direction of the catheter body 100 can be controlled according to the mark. It should be understood that similar bending moment of inertia coefficients means nearly equal. If the plurality of second channels 120 are unevenly distributed circumferentially around the first channel 110, the catheter body 100 will inevitably have a direction with a smaller bending moment of inertia coefficient. When the bending direction of the elastic member 200 is inconsistent with the direction of the smaller bending moment of inertia coefficient of the catheter body 100, the elastic member 200 will deflect towards the direction with a smaller bending moment of inertia coefficient of the catheter body 100 during bending, and the degree of deflection each time is inconsistent, making it impossible to control the bending direction of the elastic member 200 driving the catheter body 100 according to the mark.

[0054] It can be understood that the catheter body 100 is provided with a plurality of liquid outlet holes, the plurality of liquid outlet holes are all communicated with the first channel 110, and the plurality of liquid outlet holes all penetrate the outer wall of the first end.

[0055] In some patients with severe pain symptoms or poor treatment effects by electrostimulation alone, local injection treatment of the peripheral nerve can also be performed in conjunction with electrostimulation treatment. The first channel 110 can be used as an injection channel at the same time, and the injection drug can be delivered to the peripheral nerve through the first channel 110 and the liquid outlet hole. There is no need to perform additional puncture operations for injection, which can reduce the surgical risk and medical expense expenditure of the patient. It should be understood that 3 to 6 liquid outlet holes can be provided, and the multiple liquid outlet holes are distributed on the outer wall of the first end non-coaxially, so that the injected drug is more evenly distributed. It should be understood that the liquid outlet hole can be set as a microporous structure to reduce the flow rate of the injected drug flowing out of the liquid outlet hole. For example, the drug exits the liquid outlet hole in the form of droplets, avoiding the formation of a high-speed jet during injection, slowing down the diffusion of the drug, and maximizing the residence time of the drug.

[0056] Referring to Figure 3 As shown, it can be understood that the catheter body 100 is provided with a visualization part 130, and the visualization part 130 is located at the port of the first end and forms a closed structure.

[0057] The visualization part 130 can indicate the position of the first end of the catheter body 100 under the condition of visualization observation using relevant medical equipment, that is, the position of the electrode assembly 400 in the human tissue, which is convenient for adjusting and moving the electrode assembly 400 to the target position, that is, the peripheral nerve where electrostimulation treatment needs to be performed.

[0058] It should be understood that generally, when irradiating human tissue with X-rays, materials that do not transmit X-rays can be visualized, and the visualization part 130 is made of materials that do not transmit X-rays.

[0059] It can be understood that the side of the visualization part 130 away from the second end is the head, and the head is arc-shaped.

[0060] Since the visualization part 130 is arranged at the first end, when the catheter body 100 is implanted into human tissue, it is the head of the visualization part 130 that first contacts the human tissue, and the arc-shaped head can reduce the damage of the visualization part 130 to the patient's tissue and reduce the patient's pain.

[0061] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A multi-polar nerve electrical stimulation electrode catheter, characterized in that, Comprising: A flexible catheter body (100) having opposite first and second ends, the catheter body (100) being provided with a first channel (110) extending from the first end to the second end, and a closed structure being provided at the port of the first channel (110) at the first end; An elastic member (200) including a shaping section, the elastic member (200) having an initial state in which the shaping section of the elastic member (200) is bent in a plane, the elastic member (200) being disposed in the first channel (110), and the shaping section of the elastic member (200) being located at the first end; A rigid guide wire (300) movably passing through the first channel (110), the guide wire (300) being capable of moving to a restricted position or an unrestricted position within the first channel (110), in the restricted position, the guide wire (300) being capable of keeping the catheter body (100) in a straight state, and in the unrestricted position, the elastic member (200) being capable of driving the first end to bend into a spiral shape in a plane; An electrode assembly (400) disposed on the outer sidewall of the catheter body (100).

2. The multi-polar nerve electrical stimulation electrode catheter according to claim 1, wherein, The electrode assembly (400) includes a first electrode body (410) and a second electrode body (420), the first electrode body (410) being disposed on the outer sidewall of the first end, the second electrode body (420) being disposed on the outer sidewall of the second end, and the first electrode body (410) being electrically connected to the second electrode body (420).

3. The multi-polar nerve electrical stimulation electrode catheter according to claim 2, wherein, A surrounding first electrode wire is provided on the outer sidewall of the first end, the first electrode wire being wound into a spiral structure to form the first electrode body (410), a surrounding second electrode wire is provided on the outer sidewall of the second end, the second electrode wire being wound into a spiral structure to form the second electrode body (420), and the first electrode wire and the second electrode wire are of an integral structure.

4. The multi-polar nerve electrical stimulation electrode catheter according to claim 3, wherein, The catheter body (100) is provided with a second channel (120), a conductive wire is provided inside the second channel (120), the conductive wire connects the first electrode body (410) and the second electrode body (420), and the second channel (120) is isolated from the first channel (110).

5. The multi-polar nerve electrical stimulation electrode catheter according to claim 4, wherein The electrode assembly (400) includes a plurality of the first electrode bodies (410) and a plurality of the second electrode bodies (420), wherein the plurality of the first electrode bodies (410) are spaced apart along the length direction of the catheter body (100), and the plurality of the second electrode bodies (420) are spaced apart along the length direction of the catheter body (100).

6. The multi-polar nerve electrical stimulation electrode catheter according to claim 5, characterized in that, The catheter body (100) is provided with a plurality of the second channels (120), and each of the second channels (120) is provided with a conductive wire, and one conductive wire connects the first electrode body (410) and the second electrode body (420) of the same electrode assembly (400).

7. The multi-polar nerve electrical stimulation electrode catheter according to claim 6, wherein A plurality of the second channels (120) are evenly distributed circumferentially around the first channel (110).

8. The multi-polar nerve electrical stimulation electrode catheter according to claim 1, characterized in that, The catheter body (100) is provided with a plurality of liquid outlet holes, and the plurality of liquid outlet holes are all communicated with the first channel (110), and the plurality of liquid outlet holes penetrate through the outer wall of the first end.

9. The multi-polar nerve electrical stimulation electrode catheter according to claim 1, wherein The catheter body (100) is provided with a developing part (130), and the developing part (130) is located at the port of the first end and forms the closed structure.

10. The multi-polar nerve electrical stimulation electrode catheter according to claim 1, wherein, The shaping section of the elastic member (200) is bent in a spiral shape in a plane.

Images