Medical stent, electrode and electrode manufacturing process

Abstract

The invention relates to a medical stent, an electrode and an electrode manufacturing process. The medical stent comprises a central supporting assembly and a flexible supporting assembly, wherein the central supporting assembly is used for providing axial supporting; the flexible supporting assembly is arranged around the center supporting assembly and made of flexible materials, and the flexible supporting assembly is configured to be capable of being unfolded or contracted under external force. The central supporting assembly serves as a core supporting part of the stent, it is ensured that the stent cannot be excessively deformed or broken due to external force after being implanted into a human body, the flexible supporting assembly surrounds the periphery of the central supporting assembly, the Young modulus of the flexible supporting assembly is closer to that of human tissue, stress concentration when the flexible supporting assembly makes contact with the tissue can be effectively reduced, and the stability of the stent is improved. The inflammatory response is reduced, and the biocompatibility is relatively good. The electrode is integrated with an electrode contact on the surface of the flexible supporting assembly, and the electrode contact can meet the requirements of deep brain stimulation or brain-computer interface and other medical applications.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, particularly to medical stents, electrodes, and electrode manufacturing processes. Background Art

[0002] Currently, medical stents are widely used in the medical field, especially in vascular intervention therapy and brain-computer interfaces. However, existing interventional vascular stents and interventional vascular stent electrodes are generally made of shape memory alloy or titanium alloy, and there are many problems. On the one hand, the Young's modulus of the alloy does not match that of human tissues. When the metal stent contacts human tissues, due to its high Young's modulus, the metal stent will generate stress far higher than the bearing capacity of human tissues. This stress concentration will continuously stimulate the surrounding tissues, trigger chronic inflammatory reactions, and increase the pain and complication risks of patients. On the other hand, it is easy for deposits such as blood cells and osteoblasts to accumulate on the surface of the alloy stent, thereby causing stones or vascular re-blockage, affecting the treatment effect, and posing a great threat to the life and health of patients. Summary of the Invention

[0003] Based on this, a medical stent, electrodes, and electrode manufacturing processes are provided to solve the problems of mismatched mechanical properties and poor biocompatibility existing in existing medical stents and electrodes.

[0004] An embodiment of the first aspect of this application provides a medical stent, which includes:

[0005] A central support component for providing axial support;

[0006] A flexible support component surrounding the central support component, made of a flexible material, and configured to be able to expand or contract under an external force.

[0007] In one embodiment, the flexible support component includes:

[0008] A first flexible base layer provided with electrode holes for depositing electrode contacts;

[0009] A support skeleton layer disposed on one side of the first flexible base layer;

[0010] A second flexible base layer disposed on the side of the support skeleton layer away from the first flexible base layer.

[0011] In one embodiment, there are two support skeleton layers, and an intermediate flexible base layer is disposed between the two support skeleton layers.

[0012] In one embodiment, the flexible support assembly includes:

[0013] Flexible support arms, a plurality of the flexible support arms are provided, and the plurality of flexible support arms are distributed around the outer periphery of the central support assembly in a centrosymmetric manner;

[0014] A connecting member that connects the flexible support arm and the central support assembly.

[0015] In one embodiment, the connecting member includes:

[0016] A first connecting element that connects and fixes the ends of one ends of the plurality of flexible support arms to form a first connecting end, and the first connecting end is fixedly connected to the central support assembly;

[0017] A second connecting element that connects and fixes the ends of the other ends of the plurality of flexible support arms to form a second connecting end, and the second connecting end is slidably connected to the central support assembly along the axial direction.

[0018] In one embodiment, the first connecting element adhesively fixes the ends of one ends of the plurality of flexible support arms; and / or

[0019] The second connecting element adhesively fixes the ends of the other ends of the plurality of flexible support arms.

[0020] In one embodiment, the central support assembly includes a core wire, and the material of the core wire includes one or more of titanium alloy, tungsten, or nitinol;

[0021] A sliding sleeve is provided at the second connecting end, and the sliding sleeve is sleeved outside the core wire.

[0022] In one embodiment, a plurality of flexible support assemblies are arranged along the axial direction on one central support assembly, and adjacent flexible support assemblies are connected in series end to end.

[0023] An embodiment of the second aspect of the present application provides an electrode, including a medical stent and electrode contacts. The medical stent includes a central support assembly and a flexible support assembly. The central support assembly is used to provide axial support. The flexible support assembly is arranged around the central support assembly and is made of a flexible material. The flexible support assembly is configured to be able to expand or contract under an external force; the electrode contacts are integrated on the surface of the flexible support assembly, and the electrode contacts are used to collect bioelectric signals or apply electrical stimulation.

[0024] An embodiment of the third aspect of the present application provides an electrode manufacturing process, including:

[0025] Fabricate a central support component that can provide axial support;

[0026] Fabricate a flexible support component using a flexible material, and the flexible support component is configured to be able to expand or contract under an external force;

[0027] Surround the central support component with the flexible support component to form a medical stent;

[0028] Integrate electrode contacts on the surface of the flexible support component.

[0029] According to the medical stent, electrode and electrode manufacturing process of the embodiments of the present application, the central support component serves as the core support component of the stent, ensuring that the stent will not be excessively deformed or broken due to external forces after being implanted into the human body. The flexible support component surrounds the outer periphery of the central support component. The Young's modulus of the flexible support component is closer to that of human tissues, which can effectively reduce the stress concentration when contacting tissues, reduce the inflammatory reaction, and has poor biocompatibility. Electrodes integrate electrode contacts on the surface of the flexible support component, and the electrode contacts can meet the requirements of medical applications such as deep brain stimulation or brain-computer interfaces. Description of the Drawings

[0030] Figure 1 It is a schematic structural diagram of the medical stent and electrode in the contracted state according to an embodiment of the present application.

[0031] Figure 2 It is a schematic structural diagram of the medical stent and electrode in the expanded state according to an embodiment of the present application.

[0032] Figure 3 It is a schematic layer structure diagram of the flexible support component in the medical stent according to an embodiment of the present application.

[0033] Figure 4 It is a schematic structural diagram of the first flexible base layer in the medical stent according to an embodiment of the present application.

[0034] Figure 5 It is a schematic structural diagram of the support skeleton layer in the medical stent according to an embodiment of the present application.

[0035] Figure 6 It is a schematic structural diagram of the support skeleton layer arranged on the first flexible base layer in the medical stent according to an embodiment of the present application.

[0036] Figure 7 It is a schematic structural diagram of the second flexible base layer in the medical stent according to an embodiment of the present application.

[0037] Figure 8 It is a schematic layer structure diagram of the flexible support component in the medical stent according to another embodiment of the present application.

[0038] Figure 9 Schematic diagram of the structure in which multiple flexible support components in a medical stent according to an embodiment of the present application are connected in series.

[0039] Figure 10 Flow chart of the electrode manufacturing process according to an embodiment of the present application.

[0040] Reference numerals:

[0041] 1000, central support component; 1100, core wire;

[0042] 2000, flexible support component; 2010, first flexible base layer; 2011, first separation line; 2012, electrode hole; 2020, support skeleton layer; 2021, skeleton gap; 2030, second flexible base layer; 2031, second separation line; 2040, intermediate flexible base layer; 2050, sliding sleeve; 2100, flexible support arm; 2200, connecting piece; 2210, first connecting element; 2220, second connecting element;

[0043] 3000, electrode contact. Detailed implementation manners

[0044] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0045] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 application.

[0046] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0047] In the present application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0048] In the present application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal level than the second feature.

[0049] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for the purpose of illustration and do not represent the only implementation.

[0050] Refer to Figure 1 and Figure 2 , at least one embodiment of the present application provides a medical stent, which includes a central support assembly 1000 and a flexible support assembly 2000. The central support assembly 1000 is used to provide axial support; the flexible support assembly 2000 is disposed around the central support assembly 1000 and is made of a flexible material. The flexible support assembly 2000 is configured to be able to expand or contract under an external force.

[0051] According to the medical stent of the embodiment of the present application, the central support assembly 1000, as the core support component of the stent, ensures that the stent will not be excessively deformed or broken due to external forces after being implanted into the human body. The flexible support assembly 2000 surrounds the outer periphery of the central support assembly 1000. The Young's modulus of the flexible support assembly 2000 is closer to that of human tissues, which can effectively reduce the stress concentration when contacting tissues, reduce the inflammatory reaction, and has good biocompatibility. Electrodes integrate electrode contacts 3000 on the surface of the flexible support assembly 2000, and the electrode contacts 3000 can meet the requirements of medical applications such as deep brain stimulation or brain-computer interfaces.

[0052] Refer to Figure 3 , in some embodiments, the flexible support assembly 2000 includes a first flexible base layer 2010, a support skeleton layer 2020, and a second flexible base layer 2030; the support skeleton layer 2020 is disposed on one side of the first flexible base layer 2010; the second flexible base layer 2030 is disposed on the side of the support skeleton layer 2020 away from the first flexible base layer 2010.

[0053] Specifically, in some embodiments, refer to Figure 4 , the first flexible base layer 2010 is made of a flexible material. Electrode holes 2012 are provided on the first flexible base layer 2010, and the electrode holes 2012 are used for depositing the electrode contacts 3000. A plurality of first separation lines 2011 are provided on the first flexible base layer 2010.

[0054] Refer to Figure 5 , the support skeleton layer 2020 is made of a flexible metal material, and a plurality of skeleton gaps 2021 are provided on the support skeleton layer 2020, and the skeleton gaps 2021 correspond to the first separation lines 2011. Refer to Figure 6 , the first flexible base layer 2010 and the support skeleton layer 2020 are bonded together, and the positions of the skeleton gaps 2021 correspond to the first separation lines 2011.

[0055] Refer to Figure 7 , the second flexible base layer 2030 is made of a flexible material, and a plurality of second separation lines 2031 are provided on the second flexible base layer 2030, and the second separation lines 2031 respectively correspond to the first separation lines 2011 and the skeleton gaps 2021.

[0056] It is understandable that the first flexible base layer 2010 and the second flexible base layer 2030 can be made of polymer materials, specifically polyimide (abbreviated as PI), polyurethane, or hydrogel. Polyimide is a type of polymer material with excellent comprehensive properties. It has high mechanical strength, good heat resistance, and chemical stability. In this medical stent, polyimide can withstand a certain amount of pressure and tension, ensuring the structural stability of the medical stent. At the same time, its chemical properties are stable and it is not prone to adverse reactions with human tissues. Polyurethane is a new type of organic polymer material with good flexibility, wear resistance, and biocompatibility. It can adjust its hardness, elasticity, and other properties according to different formulations to meet different medical needs. Hydrogel is a hydrophilic polymer network that can absorb a large amount of water and maintain a certain shape. The softness and biocompatibility of hydrogel make it more gentle when contacting human tissues, reducing irritation to the tissues.

[0057] The Young's moduli of the above materials are closer to human tissues. Compared with traditional metal stents (such as shape memory alloys, titanium alloys, etc.), the Young's moduli of flexible substances such as PI, polyurethane, and hydrogel are more matched with human tissues, which can effectively reduce stress concentration and reduce the occurrence of inflammatory reactions. In terms of reducing precipitation, compared with metal materials, these flexible substances have a smooth surface and stable chemical properties, and are not prone to adsorbing blood cells, osteoblasts, etc., thereby reducing the risk of sediment accumulation on the surface of the stent and reducing the possibility of stone formation or vascular re-blockage.

[0058] Through the above settings, the flexible support assembly 2000 is made of the first flexible base layer 2010, the support skeleton layer 2020, and the second flexible base layer 2030, forming a three-layer structure. Then, the three-layer structure is bent and enclosed to form a three-dimensional flexible support assembly 2000. The first flexible base layer 2010 with electrode holes 2012 is the outer layer, and the electrode contacts 3000 deposited thereon are used to collect bioelectric signals or apply electrical stimulation. Since the first flexible base layer 2010, the support skeleton layer 2020, and the second flexible base layer 2030 are all made of flexible materials, the flexible support assembly 2000 can expand or contract under external force.

[0059] Refer to Figure 8 In some embodiments, there are two support skeleton layers 2020, and an intermediate flexible base layer 2040 is provided between the two support skeleton layers 2020.

[0060] Specifically, in some embodiments, the flexible support assembly 2000 includes a first flexible base layer 2010, a support skeleton layer 2020, an intermediate flexible base layer 2040, another support skeleton layer 2020, and a second flexible base layer 2030, forming a five-layer structure. Among them, the intermediate flexible base layer 2040 is made of a flexible material, and a plurality of third separation lines (not shown in the figure) are provided on the intermediate flexible base layer 2040. The third separation lines respectively correspond to the first separation line 2011, the second separation line 2031, and the skeleton gap 2021. The intermediate flexible base layer 2040 is between the two support skeleton layers 2020 and provides connection points for the support skeleton layer 2020.

[0061] Refer to Figure 1 and Figure 2 , in some embodiments, the flexible support assembly 2000 includes flexible support arms 2100 and a connecting member 2200. A plurality of flexible support arms 2100 are provided, and the plurality of flexible support arms 2100 are distributed around the outer periphery of the central support assembly 1000 in a centrally symmetric manner; the connecting member 2200 connects the flexible support arms 2100 and the central support assembly 1000. The first separation line 2011, the second separation line 2031, and the skeleton gap 2021 can separate and become larger when subjected to an external force, forming a plurality of flexible support arms 2100 within the flexible support assembly 2000.

[0062] In some embodiments, the connecting member 2200 includes a first connecting element 2210 and a second connecting element 2220. The first connecting element 2210 is used to connect and fix the ends of one ends of the plurality of flexible support arms 2100 to form a first connection end, and the first connection end is fixedly connected to the central support assembly 1000; the first connecting element 2210 connects and fixes the ends of the other ends of the plurality of flexible support arms 2100 to form a second connection end, and the second connection end is slidably connected to the central support assembly 1000 along the axial direction. One end of the flexible support arm 2100 is fixedly connected to the central support assembly 1000 through the first connecting element 2210, and the other end is slidably connected to the central support assembly 1000 through the second connecting element 2220. The second connection end is slid relative to the central support assembly 1000 so that the flexible support assembly 2000 can be switched between an unfolded state and a contracted state. Generally, when the medical stent provided by the embodiments of the present application is in use, the flexible support assembly 2000 is in a contracted state. After the medical stent is placed at the target position, the second connection end is slid so that the flexible support assembly 2000 is switched to the unfolded state.

[0063] In some embodiments, the first connecting element 2210 adhesively fixes the ends of one ends of the plurality of flexible support arms 2100; and / or the second connecting element 2220 adhesively fixes the ends of the other ends of the plurality of flexible support arms 2100. Specifically, the ends of the plurality of flexible support arms 2100 are adhesively fixed by means of adhesion such as UV glue. When the ends of the flexible support arms 2100 after being adhesively fixed are fixed to the central support assembly 1000, adhesion such as UV glue or mechanical groove bayonet can be selected for fixation. The above diverse connection methods can be selected according to different production processes and usage requirements, enhancing the adaptability and reliability of the product.

[0064] In some embodiments, the central support assembly 1000 includes a core wire 1100, and the material of the core wire 1100 includes one or more of titanium alloy, tungsten or nitinol. Through the above arrangement, the core wire 1100 has a certain supporting ability and good electrical conductivity. Titanium alloy has high strength, low density and good biocompatibility, which can reduce the adverse effects on human tissues while ensuring the stability of the stent structure; tungsten has high hardness and high melting point, providing reliable supporting performance for the stent; nitinol has unique shape memory function and superelasticity, which can ensure that the stent maintains a stable shape even in a complex in-vivo environment, effectively support the surrounding tissues, and adapt to the physiological activities of the human body at the same time. These characteristics enable the central support assembly 1000 to provide stable support and be well compatible with human tissues in a medical environment.

[0065] A sliding sleeve 2050 is provided at the second connection end, and the sliding sleeve 2050 is sleeved outside the core wire 1100. The sliding connection between the flexible support arm 2100 and the core wire 1100 at the second connection end is realized through the sliding sleeve 2050. Utilizing the mechanical principle, through a simple axial pushing action, the conversion of the stent electrode from the contracted state to the expanded state can be achieved, which provides great convenience for clinical operations and improves the surgical efficiency and accuracy.

[0066] Refer to Figure 9 In some embodiments, a plurality of flexible support assemblies 2000 are axially arranged on a central support assembly 1000, and adjacent flexible support assemblies 2000 are connected in series end to end. According to different usage requirements, different numbers of flexible support assemblies 2000 can be selected to be connected in series to match the use of chambers of different lengths.

[0067] In some embodiments, three flexible support components 2000 are axially arranged outside the core wire 1100 of a central support component 1000, and the adjacent flexible support components 2000 are connected in series end to end. It can be understood that the first connecting element 2210 at the bottom end of the lowermost flexible support component 2000 is fixedly connected to the core wire 1100, and the first connecting elements 2210 of the remaining two flexible support components 2000 are slidably connected to the core wire 1100. During use, the three flexible support components 2000 are all in a contracted state. After the medical stent is placed at the target position, the second connection end of the uppermost flexible support component 2000 is pushed to slide it on the core wire 1100, and the three flexible support components 2000 are all squeezed into an expanded state. This method can be used for implantation in narrow areas such as the cerebral ventricle.

[0068] In the medical application scenario, the sizes of human body cavities vary. For some larger cavities, the stent of a single flexible support component 2000 may not provide sufficient support range. By connecting multiple flexible support components 2000 in series, the overall support length and coverage can be increased, enabling it to better adapt to the requirements of cavities of different sizes. For example, when used as an electrode for a brain-computer interface, the electrode contacts 3000 on each flexible support component 2000 can still normally collect bioelectric signals or apply electrical stimulation.

[0069] Refer to Figure 1 and Figure 2 , at least one embodiment of the present application provides an electrode, which includes a medical stent as described in any of the above embodiments and electrode contacts 3000. The electrode contacts 3000 are integrated on the surface of the flexible support component 2000, and the electrode contacts 3000 are used to collect bioelectric signals or apply electrical stimulation.

[0070] According to the electrode in the embodiment of the present application, when it is implanted into a target area of the human body, such as a specific position in the brain, the implantation process is usually realized by means of minimally invasive medical technology. By making a tiny incision and using special implantation instruments, such as a slender catheter or an implantation needle, the contracted medical stent is slowly delivered to the target area along a preset path. This minimally invasive method can minimize the damage to surrounding normal tissues, reduce the surgical risk and the patient's pain.

[0071] When the stent reaches the target area, by operating to push one end of the stent, the flexible support structure will gradually expand, like opening a lantern, changing from the contracted state to the expanded state, so as to form a stable support structure in the body.

[0072] When the electrode is used as a brain-computer interface electrode, after the medical stent is deployed, the electrode contacts 3000 on its surface can play a role. The electrode contacts 3000 can directly contact the surrounding nerve tissue. Through these electrode contacts 3000, bioelectric signals generated by nerve cells can be collected. These signals contain information on the physiological and neural activities of the human body. Then, through a signal transmission line connected to the electrode contacts 3000, such as a flexible printed circuit board or a metal nanowire network, the collected signals are transmitted to an external signal processing device for analysis and processing; conversely, the external device can also apply specific electrical stimulation to the nerve tissue through these electrode contacts 3000 to achieve the regulation and intervention of the nervous system, and further achieve the purpose of treating diseases or assisting in the recovery of nerve function, etc.

[0073] The electrode in the embodiment of the present application, combined with a unique lantern-like structure, breaks through the limitations of traditional material applications. By setting the fulcrum on the central support assembly 1000 in the middle, the flexible support assembly 2000 in contact with the tissue can be made of a flexible material, giving full play to the advantages of flexible substances in solving the mismatch of Young's modulus and reducing precipitation.

[0074] Refer to Figure 10 , at least one embodiment of the present application proposes an electrode manufacturing process, and the electrode manufacturing process includes the following steps:

[0075] Step S100: Manufacture the central support assembly 1000, and the central support assembly 1000 can provide axial support;

[0076] Step S200: Manufacture the flexible support assembly 2000 with a flexible material, and the flexible support assembly 2000 is configured to be able to expand or contract under an external force;

[0077] Step S300: Surround the flexible support assembly 2000 outside the central support assembly 1000 to form a medical stent;

[0078] Step S400: Integrate the electrode contacts on the surface of the flexible support assembly 2000.

[0079] In some embodiments, the flexible base layer in the flexible support assembly 2000 is made by flexible printed circuit board (FPCB), spraying process or 3D printing, which has diversity in the technical implementation path. Manufacturing flexible electrodes by FPCB is a relatively mature process. By laying out circuits and fabricating electrodes on a flexible circuit board, it can achieve high-precision electrode patterning. The spraying process sprays a solution containing conductive materials such as silver nanowires and carbon nanotubes on the flexible base layer to form electrodes. It is relatively simple in operation, low in cost, can quickly form large-area electrodes, and has strong adaptability to the flexible base layer material. The 3D printing process can directly print flexible electrodes with complex shapes according to the designed three-dimensional model, enabling personalized customization to meet different application requirements, such as electrode designs for conforming to special-shaped human tissues.

[0080] In some embodiments, the first separation line 2011 and the second separation line 2031 are made by a cutting process, such as a laser cutting process. The laser cutting process uses a laser beam with a high energy density to irradiate the material, causing the material to quickly melt or vaporize, thereby achieving cutting. It has high precision and can meet the cutting requirements of the complex structure of the stent. For example, when cutting the first separation line 2011 and the second separation line 2031 on the flexible support assembly 2000, laser cutting can precisely control the depth, width, and shape, ensuring the consistency of the separation lines, which is crucial for the stability of the medical stent during the deployment and contraction processes. It can be understood that the medical stent has flexibility in the selection of the cutting process. It is not only laser cutting that can meet the manufacturing requirements, and other cutting processes are also feasible. In actual production, the appropriate cutting method can be selected according to different production conditions, cost requirements, material characteristics, etc., so as to improve the adaptability and operability of the technical solution.

[0081] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0082] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A medical stent, characterized in that: The medical stent comprises: A central support assembly, the central support assembly is used to provide axial support; A flexible support component is arranged around the central support component and is made of a flexible material. The flexible support component is configured to be able to expand or contract under external force.

2. The medical stent according to claim 1, characterized in that: The flexible support assembly comprises: a first flexible substrate layer, wherein the first flexible substrate layer is provided with electrode holes, and the electrode holes are used for depositing electrode contacts; A supporting skeleton layer, wherein the supporting skeleton layer is arranged on one side of the first flexible substrate layer; A second flexible substrate layer is disposed on a side of the supporting skeleton layer away from the first flexible substrate layer.

3. The medical stent according to claim 2, characterized in that: Two supporting skeleton layers are provided, and an intermediate flexible substrate layer is provided between the two supporting skeleton layers.

4. The medical stent according to claim 1, characterized in that: The flexible support assembly comprises: A flexible support arm, wherein a plurality of the flexible support arms are provided and the plurality of the flexible support arms are distributed around the periphery of the central support assembly in a centrally symmetrical manner; A connecting piece connects the flexible support arm and the central support assembly.

5. The medical stent according to claim 4, characterized in that: The connecting piece comprises: A first connecting element, the first connecting element is used to connect and fix the end of one end of the plurality of the flexible support arms to form a first connecting end, the first connecting end is fixedly connected to the central support assembly; The second connecting element, the first connecting element is connected and fixed to the end of the other end of the plurality of the flexible support arms to form a second connecting end, and the second connecting end is slidably connected to the central support assembly along the axial direction.

6. The medical stent according to claim 5, characterized in that: The first connecting element is used to bond and fix the end of one end of the plurality of flexible support arms; and, or The second connecting element adheres and fixes the other ends of the plurality of flexible support arms.

7. The medical stent according to claim 5, characterized in that: The central support assembly includes a core wire, the material of the core wire includes one or more of titanium alloy, tungsten or nickel-titanium alloy; The second connecting end is provided with a sliding sleeve, and the sliding sleeve is sleeved outside the core wire.

8. The medical stent according to claim 7, characterized in that: A plurality of flexible support components are arranged on the central support component along the axial direction, and adjacent flexible support components are connected in series end to end.

9. An electrode, characterized in that: It comprises a medical stent and electrode contacts, wherein the medical stent comprises a central support component and a flexible support component, wherein the central support component is used to provide axial support, the flexible support component is arranged around the central support component and is made of a flexible material, and the flexible support component is configured to be able to expand or contract under external force; the electrode contacts are integrated on the surface of the flexible support component, and the electrode contacts are used to collect bioelectric signals or apply electrical stimulation.

10. An electrode manufacturing process, characterized in that: include: Making a central support assembly, the central support assembly being capable of providing axial support; A flexible support component is made of a flexible material, and the flexible support component is configured to be able to expand or contract under external force; The flexible support component is wrapped around the central support component to form a medical stent; Electrode contacts are integrated on the surface of the flexible support component.

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