Interventional electroencephalogram signal acquisition support

Abstract

The invention provides an interventional electroencephalogram signal acquisition support, and belongs to the technical field of brain-computer interfaces in medical instruments. The stent comprises a stent body, a self-adaptive attaching structure and an electrode plate, the stent body has a compressed state and an expanded state, and the stent body is cylindrical in the expanded state and used for supporting the inner wall of a blood vessel; the self-adaptive attaching structure is arranged on the outer side of the stent body and used for automatically adjusting the pressing state of a blood vessel according to blood vessel deformation so as to ensure that the self-adaptive attaching structure can be attached to the inner side wall of the blood vessel all the time. The electrode plate is arranged on the self-adaptive fitting structure and is used for collecting an electroencephalogram signal; during working, the stent body is conveyed to a set position and automatically expands to a set shape, and the self-adaptive attaching structure automatically expands along with expansion of the stent body and tightly presses the electrode plate on the inner side wall of a blood vessel; the method is mainly used for solving the technical problem that signal quality and system reliability are affected by unstable electrode slice attachment, signal fluctuation, position drifting and the like in the prior art.

Description

Technical Field

[0001] The present invention belongs to the technical field of brain-computer interfaces in medical devices, and in particular relates to an interventional electroencephalogram (EEG) signal acquisition bracket. Background Art

[0002] Electroencephalogram (EEG) is a macroscopic recording of the electrical activity of brain neurons on the surface of the scalp or within the skull. Its frequency range typically ranges from 0.5Hz to 100Hz, with the 1Hz to 30Hz range being the most concentrated range. As a core tool for studying brain function, the acquisition and analysis of EEG signals is a key foundation for brain-computer interface technology.

[0003] A brain-computer interface (BCI) is a technology that establishes a direct communication channel between the brain and external devices. By collecting and analyzing EEG signals, BCI converts neural activity into commands recognizable by computers or other devices, enabling device control or information exchange. This technology has important applications in areas such as medical assistance and human-computer interaction.

[0004] Interventional EEG signal acquisition devices typically utilize minimally invasive techniques to deliver a stent equipped with electrodes for signal acquisition through the vascular system to the blood vessel walls of specific areas of the brain. The stent adheres closely to the vessel walls within the vessels, allowing the electrodes to come into close contact with brain tissue, thereby acquiring high-quality EEG signals. These signals reflect the activity of brain neurons and, after processing and analysis, can be used in various brain-computer interface applications, such as controlling external devices and assisting in the diagnosis of neurological diseases. During the EEG signal acquisition process, the stability of the contact between the electrodes and brain tissue and the accuracy of signal acquisition are key factors affecting the performance of the BCI system.

[0005] Existing electrode sheets are usually fixed directly on the outside of the stent. After the stent is released into the blood vessel, it automatically expands and fits the blood vessel, so that the electrode sheets on the outside of the stent are in direct contact with the blood vessel. However, this fitting method can easily cause the stent as a whole to be axially bent when the blood vessel wall is elastic and pulsating. This deformation of the stent will affect the fit between the electrode sheets on the outer wall of the stent and the inner wall of the blood vessel, thereby leading to problems such as unstable electrode sheet fit, signal fluctuations, and position drift, which seriously affect the signal quality and system reliability.

[0006] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Summary of the Invention

[0007] The purpose of the present invention is to provide an invasive EEG signal acquisition bracket to solve the technical problems existing in the prior art, such as unstable electrode fitting, signal fluctuation, position drift, etc., which affect signal quality and system reliability.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] An interventional EEG signal acquisition bracket, comprising:

[0010] The stent body has a compressed state and an expanded state. The stent body is cylindrical in the expanded state and is used to support the inner wall of the blood vessel;

[0011] An adaptive fitting structure, which is disposed on the outside of the stent body and is used to automatically adjust the compression state of the blood vessel according to the deformation of the blood vessel to ensure that it always fits the inner wall of the blood vessel;

[0012] An electrode sheet, which is arranged on the adaptive fitting structure and is used to collect brain electrical signals;

[0013] During operation, the stent body is transported to the set position and automatically expands to the set shape. The adaptive fitting structure automatically unfolds as the stent body expands and presses the electrode sheet against the inner wall of the blood vessel.

[0014] As a further optimized technical solution, the adaptive fitting structure includes a plurality of elastic support arms arranged at intervals along the axial and circumferential directions of the stent body, one end of the elastic support arm is connected to the stent body, and the other end is used to press the inner wall of the blood vessel, and the electrode sheet is arranged at the end of the elastic support arm that presses the inner wall of the blood vessel.

[0015] As a further optimized technical solution, the elastic support arm is arc-shaped. When working, the end of the elastic support arm away from the stent body is in tangential contact with the inner wall of the blood vessel.

[0016] As a further optimized technical solution, the elastic support arm has a supporting section and a pressing section. The supporting section is arranged on a side close to the bracket body, and the hardness of the supporting section is greater than the hardness of the pressing section.

[0017] As a further optimized technical solution, the curvature of the pressing section is greater than the curvature of the supporting section.

[0018] As a further optimized technical solution, the support section and the pressing section are both made of memory alloy, and the thickness of the support section is greater than the thickness of the pressing section.

[0019] As a further optimized technical solution, the material of the supporting section is a memory alloy, and the material of the pressing section is a shape memory polymer.

[0020] As a further optimized technical solution, the support body has a dense distribution area, and the arrangement density of the electrode sheets in the dense distribution area is greater than that in other areas of the support body.

[0021] As a further optimized technical solution, the dense distribution area is arranged axially and / or circumferentially around the stent body.

[0022] As a further optimized technical solution, the stent body is formed by weaving a filamentous nickel-titanium alloy or a superelastic material in one piece.

[0023] Beneficial effects: First, the traditional EEG signal acquisition stent is affected by the elasticity and pulsation of the blood vessel wall, and the electrode piece is easily unstable, resulting in poor signal quality. The present invention sets an adaptive fitting structure. When the blood vessel is deformed, the adaptive fitting structure can deform its own structure and dynamically adjust the pressure on the blood vessel wall according to the real-time shape and force conditions of the blood vessel wall. This adaptive adjustment mechanism ensures that the electrode piece is always tightly fitted to the blood vessel wall and is not affected by the deformation of the stent body. In addition, this structure further enhances the support for the blood vessel wall on the basis of the expansion support force of the stent body, greatly reducing the signal fluctuation and position drift problems caused by unstable fitting, making the stability and accuracy of EEG signal acquisition a qualitative leap, providing a stable and reliable signal source for the brain-computer interface system, and effectively ensuring the overall performance and reliability of the system.

[0024] Furthermore, the adaptive fitting structure is an elastic support arm, which adopts an arc-shaped design, and the end away from the stent body is in tangential contact with the inner wall of the blood vessel during operation. Compared with the fitting method of traditional stents, this contact mode can evenly disperse the pressure over a larger contact area, effectively avoiding local pressure concentration. Even in dynamic conditions such as blood vessel pulsation, the pressure on the blood vessel wall can be controlled within a safe range, significantly reducing the risk of damage to the blood vessel due to excessive pressure, greatly improving the safety of the stent used inside the human body, reducing the probability of postoperative complications, and providing more reliable protection for the patient's health.

[0025] Furthermore, the elastic support arm is divided into a supporting section and a compression section, and the two are designed with different hardness and curvature. The supporting section is close to the stent body and has a higher hardness, providing a solid and stable support foundation for the entire elastic support arm, ensuring that the elastic support arm will not be seriously deformed or fail under various complex situations; while the compression section with lower hardness has excellent flexibility and can closely fit the subtle undulations and irregular shapes on the surface of the blood vessel wall, achieving a full-scale, high-precision fit with the blood vessel wall. At the same time, the larger curvature design of the compression section enables the elastic support arm to produce more reasonable and efficient deformation when subjected to force, further enhancing the fitting effect and ensuring stable contact between the electrode sheet and the blood vessel wall, thereby continuously and stably collecting high-quality EEG signals.

[0026] Furthermore, the densely distributed area of ​​electrodes provided on the stent body can be flexibly arranged axially and / or circumferentially around the stent body according to actual needs, based on the functional characteristics of different brain regions and the requirements for EEG signal acquisition. For example, a densely distributed area of ​​electrodes is provided at the stent portion corresponding to the brain's motor control area (such as the middle section of the superior sagittal sinus close to the motor cortex area), which can specifically acquire more and more detailed EEG signals in that area, effectively avoiding the omission of key signals. This precise data acquisition method greatly improves the quality and efficiency of signal acquisition, and provides richer and more accurate data support for subsequent brain-computer interface applications such as motion control and disease diagnosis based on EEG signals, which helps scientific researchers and medical workers to understand the activity of brain neurons more deeply and accurately, and promotes the development of brain science research and clinical medicine.

[0027] Furthermore, the stent body is made of a filamentous nickel-titanium alloy or superelastic material, and is manufactured through an integrated braiding process. This braided stent body has enhanced overall strength and stability, enabling it to maintain structural integrity in the complex environment of human blood vessels and reliably support the inner wall of the blood vessels. Furthermore, the unique shape memory and superelastic properties of nickel-titanium alloy or superelastic material enable the stent body to achieve flexible and stable transitions between compressed and expanded states. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings and the accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. Among them:

[0029] Figure 1 This is a schematic front view of an embodiment of an interventional EEG signal acquisition stand of the present invention;

[0030] Figure 2 A side view schematic diagram of an embodiment of an interventional EEG signal acquisition stand of the present invention;

[0031] Figure 3 This is a schematic diagram of the use status of an embodiment of the interventional EEG signal acquisition bracket of the present invention.

[0032] In the figure: 1. stent body; 2. blood vessel; 3. adaptive fitting structure; 301. support section; 302. compression section; 4. electrode sheet. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0034] In the description of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixedly connected or detachably connected; they can be directly connected or indirectly connected through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. In addition, the term "proximal end" refers to the end close to the operator, and "distal end" refers to the end away from the operator.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0036] The shapes and sizes of the components in the drawings do not reflect the actual proportions of the products, and are only intended to illustrate the contents of the present invention.

[0037] The present invention provides an interventional EEG signal acquisition bracket, which includes a bracket body 1 with a compressed and expanded state, used to support the inner wall of a blood vessel 2; an adaptive fitting structure 3 provided on the outside of the bracket body 1, which can automatically adjust the compression state according to the deformation of the blood vessel 2 to ensure that it fits the inner wall of the blood vessel 2; and an electrode sheet 4 provided on the adaptive fitting structure 3, used to collect EEG signals. The adaptive fitting structure 3 includes a plurality of elastic support arms arranged at intervals, and the elastic support arms have a support section 301 and a compression section 302, which optimizes the fitting effect. The bracket body 1 is provided with an area with a dense distribution of electrode sheets 4, and is woven into a whole using filamentous nickel-titanium alloy or superelastic material. The present invention effectively improves the stability and accuracy of EEG signal acquisition, reduces the risk of vascular damage, facilitates surgical implementation, and has good application prospects in the field of brain-computer interface.

[0038] Example 1

[0039] like Figure 1 、 Figure 2 and Figure 3 As shown, the interventional EEG signal acquisition bracket includes a bracket body 1, an adaptive fitting structure 3 and an electrode sheet 4.

[0040] The stent body 1 is made of filamentous nickel-titanium alloy or superelastic material and is manufactured through an integrated braiding process. This gives the stent body 1 excellent overall strength and stability, allowing it to maintain structural integrity even in the complex human vascular environment and reliably support the inner wall of the blood vessel 2. The stent body 1 has two forms: compressed and expanded. In the compressed state, the stent body 1 is smaller in size, making it easier to deliver to the target blood vessel through an interventional catheter. After reaching the set position, the stent body 1 automatically expands to the set cylindrical shape using the unique shape memory and superelastic properties of nickel-titanium alloy or superelastic material, tightly fitting and supporting the inner wall of the blood vessel 2, providing a stable foundation for subsequent signal acquisition.

[0041] The adaptive fitting structure 3 is arranged on the outside of the stent body 1, and is used to automatically adjust the compression state of the blood vessel 2 according to the deformation of the blood vessel 2 to ensure that it always fits the inner wall of the blood vessel 2. In this embodiment, the adaptive fitting structure 3 is a plurality of elastic support arms arranged at intervals along the axial and circumferential directions of the stent body 1. The elastic support arm is a thin sheet structure, and its width direction is parallel to the axial direction of the stent body 1. One end of the elastic support arm is connected to the stent body 1, and the other end extends away from the stent body 1 to compress the inner wall of the blood vessel 2. The elastic support arm is designed to be arc-shaped. When working, the end away from the stent body 1 is in tangential contact with the inner wall of the blood vessel 2. This contact mode can evenly distribute the pressure over a larger contact area. Even in dynamic conditions such as the pulsation of the blood vessel 2, local pressure concentration can be effectively avoided, and the pressure on the wall of the blood vessel 2 can be controlled within a safe range. Each elastic support arm comprises a support section 301 and a compression section 302. The support section 301 is closer to the stent body 1 and is made harder than the compression section 302 by increasing its thickness or adjusting its material. This provides a solid and stable support foundation for the entire elastic support arm, ensuring that the elastic support arm will not severely deform or fail under various complex circumstances. The compression section 302, on the other hand, is made thinner or uses a more flexible material, such as a specially formulated shape memory polymer. This allows the compression section 302 to have a certain degree of elasticity while also having greater flexibility than the support section 301. This allows it to closely conform to the subtle undulations and irregular shapes of the blood vessel wall, achieving a comprehensive, high-precision fit with the vessel wall while minimizing damage to the vessel 2.

[0042] The electrode piece 4 is arranged at one end of the elastic support arm that presses the inner wall of the blood vessel. The electrode piece 4 is made of a highly sensitive conductive material and can accurately capture weak EEG signals. All the electrode pieces 4 are arranged along the bracket body 1 through flexible conductive lines and gathered at one end of the bracket body 1. Finally, all the gathered flexible conductive lines are connected to the external signal transmission device for interacting with external equipment. A dense distribution area is also provided on the bracket body 1. The arrangement density of the electrode pieces 4 in this area is greater than that in other areas of the bracket body 1. The dense distribution area can be flexibly arranged axially and / or circumferentially around the bracket body according to the functional characteristics of different areas of the brain and the requirements of EEG signal acquisition. For example, an electrode dense distribution area is set at the bracket part corresponding to the brain's motor control area (such as the middle section of the superior sagittal sinus close to the motor cortex area), which can specifically collect more and more detailed EEG signals in this area, effectively avoiding the omission of key signals.

[0043] Furthermore, the compression section 302 of the elastic support arm has a greater curvature than the support section 301. In this way, the compression section 302 can produce richer deformation when subjected to force, and can better buffer and absorb external forces when the blood vessel 2 pulsates or pressure changes due to physical activity. In contrast, the support section 301 has a smaller curvature and focuses more on providing a stable support base. The combination of the two enables the elastic support arm to provide both stable support and flexible response to external pressure changes, effectively reducing the risk of deformation of the stent body 1 or displacement of the electrode sheet 4 due to sudden pressure changes. In addition, the inner wall of the cerebral blood vessel 2 is not a completely regular smooth surface, and there are slight undulations and bends. The compression section 302 with a larger curvature can better adapt to the complex surface morphology of the blood vessel wall, deeply fit into the depressions of the blood vessel wall, and achieve closer and more comprehensive contact with the blood vessel wall. This design can increase the area of ​​contact between the electrode sheet 4 and the blood vessel wall, thereby ensuring the stability and accuracy of EEG signal acquisition.

[0044] Furthermore, in this embodiment, the support section 301 and the pressing section 302 of the elastic support arm are both made of a shape memory alloy. To ensure a difference in hardness between the support section 301 and the pressing section 302, the thickness of the support section 301 is greater than the thickness of the pressing section 302. In other embodiments, the support section 301 is made of a shape memory alloy, and the pressing section 302 is made of a shape memory polymer.

[0045] During actual use, the stent body 1 is compressed and loaded into the interventional catheter, and the interventional catheter is slowly transported along the vascular path to the target blood vessel 2 in the middle section of the superior sagittal sinus of the brain near the motor cortex area through femoral artery puncture. When the stent body 1 reaches the predetermined position, due to the effect of human body temperature, the stent body 1 made of nickel-titanium alloy automatically expands, and at the same time drives the adaptive fitting structure 3 to unfold. The elastic support arm dynamically adjusts the pressure on the blood vessel wall through its own deformation according to the shape and pressure changes of the blood vessel wall, so that the electrode sheet 4 fits tightly on the inner wall of the blood vessel. At this time, the electrode sheet 4 begins to collect EEG signals in the brain's motor control area, and transmits the signals to external signal processing equipment through flexible conductive lines for analysis and processing, successfully realizing the collection of high-quality EEG signals in specific brain areas.

[0046] In summary, the interventional EEG signal acquisition bracket provided by the present invention effectively solves the technical problem of unstable EEG signal acquisition in the prior art through its unique structural design and reasonable material selection, and has good application prospects and promotion value in the field of brain-computer interface.

[0047] It will be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0048] The above are only preferred embodiments of the present invention and are 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 scope of protection of the pending claims of the present invention.

Claims

1. An interventional EEG signal acquisition bracket, characterized in that: include: A stent body (1), wherein the stent body (1) has a compressed state and an expanded state, and the stent body (1) is cylindrical in the expanded state and is used to support the inner wall of the blood vessel (2); An adaptive fitting structure (3), the adaptive fitting structure (3) being arranged outside the stent body (1) and being used for automatically adjusting the compression state of the blood vessel (2) according to the deformation of the blood vessel (2) to ensure that the structure always fits the inner wall of the blood vessel (2); An electrode sheet (4), the electrode sheet (4) being arranged on the adaptive fitting structure (3) and being used for collecting brain electrical signals; During operation, the stent body (1) is transported to a set position and automatically expands to a set shape, and the adaptive fitting structure (3) automatically unfolds as the stent body (1) expands and presses the electrode sheet (4) against the inner wall of the blood vessel (2).

2. The invasive EEG signal acquisition bracket according to claim 1, characterized in that: The adaptive fitting structure (3) comprises a plurality of elastic support arms arranged at intervals along the axial and circumferential directions of the stent body (1); one end of the elastic support arm is connected to the stent body (1), and the other end is used to press the inner wall of the blood vessel (2); the electrode sheet (4) is arranged at the end of the elastic support arm that presses the inner wall of the blood vessel (2).

3. The invasive EEG signal acquisition bracket according to claim 2, characterized in that: The elastic support arm is arc-shaped. When in operation, the end of the elastic support arm away from the stent body (1) is in tangential contact with the inner wall of the blood vessel (2).

4. The invasive EEG signal acquisition bracket according to claim 2, characterized in that: The elastic support arm comprises a support section (301) and a pressing section (302); the support section (301) is arranged on a side close to the bracket body (1); and the hardness of the support section (301) is greater than the hardness of the pressing section (302).

5. The invasive EEG signal acquisition bracket according to claim 4, characterized in that: The curvature of the pressing section (302) is greater than the curvature of the supporting section (301).

6. The invasive EEG signal acquisition bracket according to claim 5, characterized in that: The materials of the supporting section (301) and the pressing section (302) are both memory alloys, and the thickness of the supporting section (301) is greater than the thickness of the pressing section (302).

7. The invasive EEG signal acquisition bracket according to claim 5, characterized in that: The material of the supporting section (301) is a memory alloy, and the material of the pressing section (302) is a shape memory polymer.

8. The interventional EEG signal acquisition bracket according to any one of claims 1 to 7, characterized in that: The support body (1) has a dense distribution area, and the arrangement density of the electrode sheets (4) in the dense distribution area is greater than that in other areas of the support body (1).

9. The invasive EEG signal acquisition bracket according to claim 8, characterized in that: The dense distribution area is arranged axially and / or circumferentially around the stent body (1).

10. The interventional EEG signal acquisition bracket according to any one of claims 1 to 7, characterized in that: The stent body (1) is formed by weaving a filamentous nickel-titanium alloy or a superelastic material into an integral piece.

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