An intracranial brain-computer interface stent delivery catheter

Abstract

The application provides an interventional brain-computer interface stent delivery catheter, and belongs to the technical field of medical devices. The delivery catheter comprises a catheter body and an operation handle located at the proximal end of the catheter body. The proximal end of the catheter body is provided with a reset elastic element. The proximal end of the reset elastic element is fixedly connected with the operation handle, and the distal end is fixedly connected with the catheter body, so as to increase the bending resistance of the proximal end of the catheter body. The radial size of the catheter body gradually increases in the extension direction from the distal end to the proximal end, and is used for delivering the brain-computer interface stent to the target position. The application is mainly used for solving the technical problems that the operation process is complicated when the brain-computer interface stent is released in the prior art, and the brain-computer interface stent cannot be adapted to the special blood vessels from the neck vein, the left subclavian vein to the brain.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to an interventional brain-computer interface stent delivery catheter. Background Technology

[0002] In the field of brain-computer interface (BCI) technology, a BCI scaffold is a scaffold that can be implanted into the brain via blood vessels. The scaffold is equipped with electrode pads for signal acquisition, providing a method for intravascular brain signal acquisition or electrical stimulation for BCI interfaces. In existing technologies, it is compressed into a catheter inserted through the jugular vein in the neck. The catheter meanders through the blood vessel, reaches the motor cortex of the brain, and then releases the scaffold. The electrode pads on the scaffold contact the blood vessel wall at selected locations in the brain. The scaffold is connected by wires to a surgically implanted device in the chest cavity for power and data transmission. The external device can convert brain signals into computer commands. This approach has the potential to treat a wide range of neurological diseases, such as Parkinson's disease and epilepsy, through neuromodulation methods such as electrical stimulation. It can also help patients with ALS and paralysis to achieve thought-based typing and control of external devices.

[0003] Interventional brain-computer interface delivery systems include a variety of key instruments. The catheter, as the main delivery channel, needs to possess excellent resistance to bending, fatigue, and torsion. In complex vascular environments, the catheter must be able to bend flexibly and pass smoothly through various vascular branches, while resisting fatigue damage caused by repeated bending and torsion, ensuring the stability and reliability of the delivery process.

[0004] The existing delivery system consists of a combination of multiple instruments, requiring the sequential coordination of multiple instruments to complete the operation. The access establishment process is cumbersome and lengthy: first, the sheath is guided into place by a guidewire, and then the support catheter is pushed through the sheath; after the support catheter is in place, the sheath and guidewire are withdrawn, and the distal access catheter is pushed along the lumen of the support catheter to the area near the signal acquisition. Then, the microcatheter is delivered to the signal acquisition site through the distal access catheter, and finally the stent is released through the lumen of the microcatheter. The entire operation involves many steps, is time-consuming, and is difficult to operate. It not only takes up valuable time during the operation, but may also increase patient trauma and discomfort.

[0005] In addition, existing interventional pathways are mostly general structures and have not been specifically optimized for the special blood vessels and physiological structures (multiple complex bends, large bending angles, and tortuousness) of the human jugular vein and left subclavian vein leading to the brain. This results in technical problems such as low pathway matching, high delivery resistance, and poor fit.

[0006] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0007] The purpose of this invention is to provide an interventional brain-computer interface stent delivery catheter to solve the technical problems of cumbersome operation procedures and inability to adapt to special blood vessels from the jugular vein and left subclavian vein to the brain in the prior art when releasing brain-computer interface stents.

[0008] To achieve the above objectives, the interventional brain-computer interface stent delivery catheter of the present invention provides the following technical solution: An interventional brain-computer interface stent delivery catheter includes a catheter body and an operating handle located at the proximal end of the catheter body. A reset elastic element is arranged at the proximal end of the catheter body. The proximal end of the reset elastic element is fixedly connected to the operating handle, and the distal end is fixedly connected to the catheter body to increase the bending resistance of the proximal end of the catheter body. The radial dimension of the catheter body gradually increases from the distal end to the proximal end, and is used to deliver the brain-computer interface scaffold to the target location.

[0009] As a further optimized technical solution, the reset elastic element is a helical spring.

[0010] As a further optimized technical solution, the helical spring is sleeved on the outside of the catheter body, and the inner diameter of the helical spring is adapted to the outer diameter of the catheter body.

[0011] As a further optimized technical solution, the catheter body is arranged with a guiding section, a delivery section, a transition section and a support section in sequence from the distal end to the proximal end.

[0012] As a further optimized technical solution, the guiding section has a single-layer soft elastic layer, which is used to adjust the radial dimension according to the inner diameter of the blood vessel to reduce stimulation of the blood vessel.

[0013] As a further optimized technical solution, the delivery section, transition section and support section each include at least an inner liner, a support layer and a protective layer. The inner liner is located inside the catheter body, the protective layer is located outside the catheter body, and the support layer is located between the inner liner and the protective layer.

[0014] As a further optimized technical solution, the inner liner is made of a low-friction coefficient polymer material, and a silicone oil electroplated film is arranged on the side of the inner liner facing the lumen of the catheter body.

[0015] As a further optimized technical solution, the support layer of the support section includes a nickel-titanium alloy wire winding structure and a nickel-titanium alloy braided structure.

[0016] As a further optimized technical solution, the support layer of the conveying section includes a nickel-titanium alloy wire winding structure, and the support layer of the transition section includes a nickel-titanium alloy braided structure.

[0017] As a further optimized technical solution, a developing component is arranged at the far end of the guiding section.

[0018] Beneficial effects: First, the present invention, through the structural design of arranging a reset elastic element at the proximal end of the catheter body, and fixing the proximal end of the reset elastic element to the operating handle and the distal end to the catheter body, provides elastic support at the connection between the proximal end of the catheter body and the handle, thereby enabling good automatic reset capability after bending. This effectively disperses the concentrated stress generated during catheter bending, significantly improves the bending resistance and lumen integrity under large-angle bending conditions, and reduces the risk of catheter breakage or lumen collapse during repeated bending and torsion. Therefore, it is more suitable for interventional operations involving special blood vessels and physiological structures in the human body, such as the jugular vein, left subclavian vein, and brain.

[0019] Secondly, the invention employs a variable-diameter design where the radial dimension of the catheter body gradually increases from distal to proximal. This results in better distal flexibility and positioning, and better proximal support and force transmission. The overall shape is more adapted to the physiological course from peripheral blood vessels to the target blood vessel in the brain. The high distal flexibility allows for smooth passage through large-angle bends such as the jugular bulb, enabling smooth passage through the complex vascular pathway from the jugular vein and left subclavian vein to the brain. This significantly improves pathway compatibility and reduces delivery resistance. Furthermore, this design makes it easier to deliver the distal end of the catheter body to the distal end. Compared to existing technologies, it eliminates the need for step-by-step delivery, allowing the brain-computer interface stent to be directly loaded into the catheter body cavity and delivered to the target location in one go along the guidewire. This eliminates the need for the multi-instrument step-by-step operation required in existing technologies, such as first guiding the sheath with the guidewire, then pushing the support catheter through the sheath, then withdrawing the sheath and guidewire, then pushing the distal access catheter, and then pushing the microcatheter. This significantly simplifies the surgical procedure, reduces the number of steps, shortens the surgical time, and reduces the difficulty of operation and the risk of trauma to the patient. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein: Figure 1 This is a schematic diagram of the overall structure of an embodiment of the interventional brain-computer interface stent delivery catheter of the present invention; Figure 2 for Figure 1 Right view of the central catheter body; Figure 3 This is a schematic diagram of a delivery state of a brain-computer interface stent according to an embodiment of the interventional brain-computer interface stent delivery conduit of the present invention; Figure 4 This is a schematic diagram of another delivery state of the brain-computer interface stent, which is an embodiment of the interventional brain-computer interface stent delivery catheter of the present invention. Figure 5 This is a schematic diagram of the operating handle structure of an embodiment of the interventional brain-computer interface stent delivery catheter of the present invention; Figure 6 This is a schematic diagram of the inner liner structure of an embodiment of the interventional brain-computer interface stent delivery catheter of the present invention; Figure 7 This is a schematic diagram of the support section structure of an embodiment of the interventional brain-computer interface stent delivery catheter of the present invention.

[0021] In the diagram: 1. Catheter body; 1-1. Guiding section; 1-2. Delivery section; 1-3. Transition section; 1-4. Support section; 1-01. Inner liner; 1-02. Support layer; 1-02-1. Wire winding structure; 1-02-2. Braided structure; 1-03. Protective layer; 1-04. Silicone oil electroplating film; 2. Reset elastic element; 3. Operating handle; 3-1. Connecting port; 3-2. Glue injection hole; 4. Imaging component; 5. Brain-computer interface scaffold. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0023] In the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. Furthermore, the term "proximal end" uniformly refers to the end closer to the operator, while "distal end" refers to the end farther from the operator.

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0025] The shapes and sizes of the components in the accompanying drawings do not reflect the actual proportions of the product; they are only intended to illustrate the content of the invention.

[0026] Brain-computer interface (BCI) stents differ fundamentally from conventional neurointerventional stents. Conventional neurointerventional stents typically consist of a single metal mesh structure with high structural strength, good resistance to compression and bending, and a relatively short delivery path. In contrast, BCI stents integrate multiple electrode pads and extremely fine signal leads—all precision electronic components—making them fragile and highly sensitive to abrasion and compression. Furthermore, the delivery path involves multiple sharp bends through the jugular vein to the motor cortex of the brain, resulting in a longer and more complex path compared to neurointerventional stents. Based on these differences, existing technologies employ a multi-instrument, step-by-step delivery method to reduce stent damage. However, this method already makes the delivery process cumbersome during neurointerventional stent delivery. Using this method for BCI stents with longer and more precise delivery paths would further reduce surgical efficiency and inconvenience. Therefore, this invention aims to simplify the operational process while ensuring the integrity of the BCI stent through optimized structural design. According to specific embodiments of the present invention, in order to solve the technical problems of cumbersome operation procedures and inability to adapt to special blood vessels from the jugular vein and left subclavian vein to the brain in the prior art when releasing a brain-computer interface scaffold, such as... Figure 1-7 As shown, this invention provides an interventional brain-computer interface (BCI) stent delivery catheter. The delivery catheter includes a catheter body 1 and an operating handle 3 located proximally to the catheter body. A repositioning elastic element 2 is arranged proximally to the catheter body 1, with its proximal end fixedly connected to the operating handle 3 and its distal end fixedly connected to the catheter body 1. The radial dimension of the catheter body 1 gradually increases from distal to proximal. The catheter body 1 is sequentially arranged from distal to proximal with a guiding section 1-1, a delivery section 1-2, a transition section 1-3, and a support section 1-4. The delivery section 1-2, transition section 1-3, and support section 1-4 each include at least an inner liner layer 1-01, a support layer 1-02, and a protective layer 1-03. This invention employs a gradually changing radial dimension and segmented structural design, along with a repositioning elastic element 2 arranged proximally to the catheter body. This better adapts to the special vascular pathways from the jugular vein and left subclavian vein to the brain, effectively simplifying the surgical procedure, reducing operational steps, and shortening surgical time, making it more suitable for the delivery of BCI stents in BCI surgery.

[0027] Example 1

[0028] like Figure 1As shown, this invention provides an interventional brain-computer interface (BCI) stent delivery catheter, comprising a catheter body 1 and an operating handle 3 located proximally to the catheter body 1. A repositioning elastic element 2 is arranged at the proximal end of the catheter body 1. The proximal end of the repositioning elastic element 2 is fixedly connected to the operating handle 3, and the distal end is fixedly connected to the catheter body 1 to increase the bending resistance of the proximal end of the catheter body 1. The radial dimension of the catheter body 1 gradually increases from the distal end to the proximal end (i.e., the distal diameter is smaller, and the proximal diameter is larger), allowing the BCI stent 5 to be loaded and directly reach the target location (i.e., the release position of the BCI stent, which is determined by the physician based on actual clinical conditions, typically within a vein near the target brain cortex with a suitable vessel diameter and stable morphology) along the guidewire.

[0029] In this embodiment, the reset elastic element 2 is a helical spring, which is sleeved on the outside of the catheter body 1, and the inner diameter of the helical spring is adapted to the outer diameter of the catheter body 1. When the catheter is bent, the reset elastic element 2 absorbs and disperses the concentrated stress through the elastic deformation of the spring structure, so that the catheter body 1 can still maintain the integrity of the tube structure under the condition of a large angle bend of 120°. After the bending external force disappears, the elastic restoring force of the spring is used to reset the catheter body, effectively avoiding the catheter body 1 from breaking or irreversibly deforming when it bends at a large angle through special blood vessels such as the jugular vein and the left subclavian vein to the brain.

[0030] like Figure 2 As shown, the catheter body 1 is a tubular structure with a lumen for accommodating the brain-computer interface stent 5. The catheter body 1 is arranged sequentially from distal to proximal as a guiding section 1-1, a delivery section 1-2, a transition section 1-3, and a support section 1-4. The guiding section 1-1, located at the distal end of the catheter body 1, has a single-layer soft elastic layer for adaptively adjusting its radial dimensions according to the vessel's inner diameter, thereby reducing irritation to the vessel. Specifically, in this embodiment, the guiding section 1-1 is made of thermoplastic polyurethane elastomer or polyamide elastomer. Due to its single-layer soft elastic structure, the guiding section 1-1 possesses adaptive morphological adjustment capabilities: during interventional delivery, it can undergo adaptive elastic deformation according to the inner diameter of the vessel it traverses, allowing the catheter's outer diameter to conform to the vessel's inner diameter, reducing the step effect, increasing permeability, and simultaneously, the soft material effectively reduces mechanical stimulation and damage to the vessel's inner wall.

[0031] The delivery section 1-2 is located proximal to the guide section 1-1 and is the main accommodating section of the brain-computer interface scaffold 5 during delivery. The transition section 1-3 is located between the delivery section 1-2 and the support section 1-4, serving as a mechanical transition connection. The support section 1-4 is located at the distal end of the catheter body 1 and is used to provide structural support during the delivery process.

[0032] The transport section 1-2, transition section 1-3 and support section 1-4 each include at least an inner liner 1-01, a support layer 1-02 and a protective layer 1-03. The inner liner 1-01 is located inside the catheter body 1, the protective layer 1-03 is located outside the catheter body 1, and the support layer 1-02 is located between the inner liner 1-01 and the protective layer 1-03.

[0033] like Figure 6 As shown, the inner liner 1-01 is made of a low-friction polymer material, specifically a polytetrafluoroethylene (PTFE) film substrate. A silicone oil electroplated film 1-04 is arranged on the side of the inner liner 1 facing the lumen of the catheter body 1. That is, the PTFE film substrate is modified by silicone oil electroplating, so that the inner surface of the catheter lumen has an extremely low friction coefficient, which can significantly reduce the resistance when the brain-computer interface stent 5 passes through the lumen, ensuring that the brain-computer interface stent 5 and its mounted signal acquisition chip pass smoothly, and avoiding the signal acquisition chip on the brain-computer interface stent 5 from being scratched and damaged or malfunctioning.

[0034] The protective layer 1-03 is made of polyamide elastomer material (such as Pebax). Different sections can use protective layer materials with different hardness: the outer layer material of the guide section 1-1 has the lowest hardness, the outer layer material of the transport section 1-2 has the next lowest hardness, slightly higher than the guide section 1-1, the outer layer material of the transition section 1-3 has the highest hardness, and the outer layer material of the support section 1-4 has the highest hardness, thus achieving a mechanical gradient of gradually increasing hardness from the distal to the proximal end. The protective layer 1-03 is thermally fused to the surface of the conduit body 1 at high temperature. The molten protective layer 1-03 material can penetrate and fill the support layer 1-02 and fully fuse with the inner liner layer 1-01, so that the inner liner layer 1-01, the support layer 1-02 and the protective layer 1-03 form an inseparable integrated cavity structure, avoiding problems such as interlayer peeling and loosening.

[0035] like Figure 7 As shown, the support layer 1-02 of the support section 1-4 includes a nickel-titanium alloy wire winding structure 1-02-1 and a nickel-titanium alloy braided structure 1-02-2. The wire winding structure 1-02-1 is spirally wound onto the outer surface of the inner liner layer 1-01 to enhance circumferential strength and resistance to compression. The braided structure 1-02-2 uses nickel-titanium alloy wire in a braided mesh structure to cover the outer surface of the wire winding structure 1-02-1 to enhance axial support and torsional control. The composite structure of the wire winding structure and the braided structure can be used to jointly improve the axial support, circumferential torsional control, and fatigue resistance to repeated bending of the support section 1-4.

[0036] The support layer 1-02 of the delivery section 1-2 includes a nickel-titanium alloy wire structure 1-02-1, but does not include a braided structure, to ensure that the delivery section 1-2 has sufficient flexibility to pass through tortuous blood vessels, while the wire structure provides basic circumferential strength to prevent lumen collapse. The support layer 1-02 of the transition section 1-3 includes a nickel-titanium alloy braided structure 1-02-2, but does not include a wire structure. Compared with the delivery section 1-2, it can increase the support of this section, making the support of this section greater than that of the delivery section 1-2, while its flexibility is greater than that of the support section 1-4. The purpose of this design is to achieve a gradient distribution of the mechanical properties of each segment of the catheter body 1: from the distal to the proximal end, the flexibility gradually decreases and the support gradually increases.

[0037] like Figure 3 and Figure 4 As shown, the brain-computer interface stent 5 is loaded inside the lumen of the catheter body 1, preferably within the delivery section 1-2 and / or the guidance section 1-1. During delivery, the catheter body 1 is pushed along the guidewire (not shown in the figure). After reaching the target blood vessel, the outer layer of the catheter body 1 is retracted (or the brain-computer interface stent 5 is pushed forward), allowing the brain-computer interface stent 5 to self-expand and adhere to the blood vessel wall.

[0038] like Figure 5 As shown, the operating handle 3 has a Y-shaped handle structure, including two connecting ports 3-1 and an injection port 3-2. The two connecting ports 3-1 have a set angle, which can be used to deliver specified instruments into the lumen of the catheter body 1 during the operation. Specifically, during the assembly process of the catheter body 1 and the operating handle 3, the proximal end of the catheter body 1 is inserted into the distal end port of the operating handle 3. Adhesive is injected into the injection port 3-2 of the operating handle 3 to seal and fix the distal end of the operating handle 3 to the proximal end of the catheter body 1.

[0039] Furthermore, a contrast-enhancing component 4 is disposed at the distal end of the guide segment 1-1. The contrast-enhancing component 4 is an X-ray contrast ring, made of platinum-iridium alloy or gold, and embedded in the wall of the catheter body 1. The contrast-enhancing component 4 is used to mark the position of the distal end of the guide segment 1-1 under X-ray fluoroscopy, which facilitates the operator to accurately determine the movement position of the distal end of the catheter in the blood vessel and the release position of the brain-computer interface stent 5 under image guidance.

[0040] The specific method of using the delivery catheter of the interventional brain-computer interface stent of the present invention is as follows: Step 1: Compress and load the brain-computer interface scaffold 5 into the lumen of the delivery section 1-2 and / or the guidance section 1-1 of the catheter body 1.

[0041] Step two: Puncture the jugular vein or left subclavian vein, insert a guidewire, and under X-ray fluoroscopy guidance, advance the guidewire along the jugular vein and left subclavian vein, passing through multiple vascular bends, to reach the target vascular region of the brain.

[0042] Step three: The entire delivery catheter of the present invention, equipped with the brain-computer interface stent 5, is pushed along the guidewire (specifically, the brain-computer interface stent 5 is fitted onto the guidewire in the middle, so that the catheter body 1 moves along the guidewire), allowing the distal end of the catheter body 1 to advance along the guidewire path. The imaging component 4 clearly displays the position of the distal end of the catheter under X-ray fluoroscopy until the distal end of the catheter body 1 reaches the release position (i.e., the target position) predetermined by the doctor according to the patient's condition.

[0043] Step 4: After confirming that the distal end of the catheter body 1 has reached the target position, keep the position of the brain-computer interface stent 5 unchanged, retract the outer layer of the catheter body 1 (or push the brain-computer interface stent 5 forward out of the distal end of the catheter), so that the brain-computer interface stent 5 expands and unfolds, and the electrode pads on the brain-computer interface stent 5 are tightly attached to the blood vessel wall.

[0044] Step 5: After confirming that the brain-computer interface stent 5 is in the correct position and deployed state, remove the entire delivery catheter from the body to complete the interventional procedure.

[0045] Example 2

[0046] The difference between this embodiment and Embodiment 1 lies in the specific structural form of the reset elastic element 2. In this embodiment, the reset elastic element 2 is an elastic support bar arranged at intervals along the circumference of the catheter body. The elastic support bar is made of a superelastic nickel-titanium alloy material and extends along the axial direction of the catheter body 1.

[0047] Each elastic support bar is disposed on the outer surface of the proximal end of the catheter body 1. The proximal end of the elastic support bar is fixedly connected to the outer wall of the distal port of the operating handle 3, and the distal end is fixedly connected to the outer surface of the proximal end of the catheter body 1.

[0048] When the catheter is in a straight position, each elastic support bar extends parallel to the axis of the catheter body and fits tightly against the outer wall of the catheter without increasing the outer diameter of the catheter. When the catheter body 1 is bent, each elastic support bar undergoes elastic deformation as the catheter bends. After the bending force disappears, the superelastic restoring force of the nickel-titanium alloy pushes the catheter body 1 back to a straight position.

[0049] Example 3

[0050] The difference between this embodiment and Embodiment 1 lies in the specific structural form of the reset elastic element 2. In this embodiment, the reset elastic element 2 is a shape memory alloy skeleton elastic element, which is laser-engraved from a superelastic nickel-titanium alloy tube. After engraving, it forms a multi-row rhomboid mesh structure arranged along the axial direction (similar to the mesh shape of a vascular stent), and the rows of rhomboid meshes are connected by axial connecting ribs.

[0051] The skeleton-type elastic element is sleeved on the outside of the proximal end of the catheter body 1 or embedded in the catheter wall. Its proximal end is fixedly connected to the operating handle 3, and its distal end is fixedly connected to the catheter body 1.

[0052] When the conduit is bent, the rhomboid mesh structure undergoes elastic deformation. The rhomboid mesh on the inner side of the bend is compressed (the acute angle of the rhombus becomes smaller), while the rhomboid mesh on the outer side of the bend is stretched (the acute angle of the rhombus becomes larger). The stress is distributed to the connecting ribs of each mesh unit, avoiding stress concentration. After the bending force disappears, the superelasticity of the nickel-titanium alloy causes each mesh unit to return to its original rhomboid shape.

[0053] In summary, the delivery catheter provided by this invention is an integrated single-instrument structure. The brain-computer interface stent 5 is directly loaded into the inner lumen of the catheter body 1 and delivered as a whole in one go. This eliminates the need for the multi-instrument step-by-step operation as in the prior art, which involves first guiding the sheath into place with a guidewire, then pushing the support catheter through the sheath, then withdrawing the sheath and guidewire, then pushing the distal access catheter, and then pushing the microcatheter. Compared with the prior art, this can effectively reduce the difficulty of surgical operation, simplify the surgical process, shorten the operation time, and reduce the risk of vascular damage and infection caused by instrument exchange.

[0054] It is understood that the above description is merely exemplary and the embodiments of this application do not limit the scope of the application.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are within the protection scope of the present invention.

Claims

1. An interventional brain-computer interface stent delivery catheter, comprising a catheter body (1) and an operating handle (3) located proximal to the catheter body (1), characterized in that, The catheter body (1) is provided with a resetting elastic element (2) at the proximal end. The resetting elastic element (2) is fixedly connected to the operating handle (3) at the proximal end and to the catheter body (1) at the distal end, so as to increase the bending resistance of the proximal end of the catheter body (1). The radial dimension of the catheter body (1) gradually increases from the distal end to the proximal end, and is used to deliver the brain-computer interface scaffold (5) to the target location.

2. The interventional brain-computer interface stent delivery catheter according to claim 1, characterized in that, The reset elastic element (2) is a helical spring.

3. The interventional brain-computer interface stent delivery catheter according to claim 2, characterized in that, The helical spring is sleeved on the outside of the catheter body (1), and the inner diameter of the helical spring is adapted to the outer diameter of the catheter body (1).

4. The interventional brain-computer interface stent delivery catheter according to claim 1, characterized in that, The catheter body (1) is arranged from distal to proximal as a guiding section (1-1), a delivery section (1-2), a transition section (1-3), and a support section (1-4).

5. The interventional brain-computer interface stent delivery catheter according to claim 4, characterized in that, The guiding section (1-1) has a single layer of soft elasticity, which is used to adjust the radial dimension according to the inner diameter of the blood vessel to reduce stimulation of the blood vessel.

6. The interventional brain-computer interface stent delivery catheter according to claim 4, characterized in that, The delivery section (1-2), transition section (1-3) and support section (1-4) each include at least an inner liner (1-01), a support layer (1-02) and a protective layer (1-03). The inner liner (1-01) is located inside the catheter body (1), the protective layer (1-03) is located outside the catheter body (1), and the support layer (1-02) is located between the inner liner (1-01) and the protective layer (1-03).

7. The interventional brain-computer interface stent delivery catheter according to claim 6, characterized in that, The inner liner (1-01) is made of a low-friction coefficient polymer material, and a silicone oil electroplated film (1-04) is arranged on the side of the inner liner (1) facing the lumen of the catheter body (1).

8. The interventional brain-computer interface stent delivery catheter according to claim 6, characterized in that, The support layer (1-02) of the support section (1-4) includes a nickel-titanium alloy wire winding structure (1-02-1) and a nickel-titanium alloy braided structure (1-02-2).

9. The interventional brain-computer interface stent delivery catheter according to claim 6, characterized in that, The support layer (1-02) of the conveying section (1-2) includes a nickel-titanium alloy wire winding structure (1-02-1), and the support layer (1-02) of the transition section (1-3) includes a nickel-titanium alloy braided structure (1-02-2).

10. The interventional brain-computer interface stent delivery catheter according to any one of claims 4-9, characterized in that, A developing component (4) is arranged at the far end of the guiding section (1-1).

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