Implantable devices and visual prostheses containing them

Abstract

This invention discloses an implantable device and a visual prosthesis having the same. The implantable device includes: a shell comprising an annular housing and a cover enclosing the annular housing, the annular housing being a metal shell; a flexible electrode comprising an introduction portion, a cable, and a stimulation portion; and an electronic device connected to the introduction portion of the flexible electrode to form an electronic device package, the electronic device package being located within the space formed by the annular housing and the cover. The introduction portion of the flexible electrode is electrically connected to the inner wall of the annular housing. When driven by a positive voltage, the implantable device forms an electrical stimulation circuit sequentially from the current drive output port within the electronic device package, the introduction portion of the flexible electrode, the stimulation portion, the stimulated tissue, the annular housing, to the ground wire of the current drive circuit within the electronic device package. The implantable device of this invention does not require a separate circuit electrode, and the entire implantable device has a simple structure and is easy to manufacture.

Description

Technical Field

[0001] This invention relates to the field of implantable medical device technology, and in particular to an implantable device and a visual prosthesis having therein. Background Technology

[0002] Visual prostheses are implantable medical devices designed to help patients with retinal or other visual organ diseases regain sight and vision. Normal vision is formed when photoreceptor cells on the retina (such as cone cells and rod cells) convert light stimuli into electrical signals. After being encoded by cells in various layers of the retina (such as horizontal cells, bipolar cells, ganglion cells, etc.), nerve impulses are transmitted to the visual cortex.

[0003] A commonly used visual prosthesis design involves implanting microelectrodes onto the surface of the retina to help patients with outer retinal degenerative diseases such as retinitis pigmentosa and age-related macular degeneration. This visual prosthesis consists of two parts: the implant and the external component. The electronic package within the implant is sutured to the outer side of the sclera, and flexible electrodes pass through the eyeball wall. The electrode array at its end is fixed to the retinal surface using pins. The external component includes a camera that captures video information. After data conversion, the video information is wirelessly transmitted to the electronic package within the implant. The electrode array then delivers electrical stimulation to the retina. The electrical pulses transmitted to the retina stimulate the neurons that still retain function, and this stimulation is transmitted to the brain via the optic nerve, enabling the patient to perceive vision. After electrical stimulation, a circuit needs to be formed, allowing the current to return to the electronic package to complete the circuit cycle.

[0004] In the prior art, a common approach is to set a loop electrode on a flexible electrode. This has a complex structure, which increases the difficulty of manufacturing the flexible electrode. Moreover, this also causes the electrical stimulation circuit to be confined to the vitreous cavity of the eyeball. Since the current does not penetrate deeply into the retinal cells, a larger stimulation current is required to ensure the stimulation effect. The electrode array needs to withstand a greater load, which can easily cause fatigue for patients after prolonged use. In addition, it consumes electrical energy and reduces battery life. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide an implantation device that has a simple structure and is easy to manufacture.

[0006] Another object of the present invention is to provide a visual prosthesis having the above-described implantation device.

[0007] An implantation device according to a first aspect of the present invention includes: a housing comprising an annular shell and a cover enclosing the annular shell, the annular shell being a metal shell; a flexible electrode comprising an introduction portion, a cable, and a stimulation portion; and an electronic device connected to the introduction portion to form an electronic device package, the electronic device package being located within the space formed by the annular shell and the cover, the introduction portion of the flexible electrode being electrically connected to the inner wall of the annular shell, and the implantation device forming an electrical stimulation circuit sequentially from a current drive output port within the electronic device package, the introduction portion of the flexible electrode, the stimulation portion, the stimulated tissue, the annular shell, to the ground wire of the current drive circuit within the electronic device package when driven by a positive voltage.

[0008] According to an embodiment of the first aspect of the present invention, the implantation device arranges an electronic device package, formed by the introduction portion of the electronic device and the flexible electrode, within a housing, and electrically connects the introduction portion to the annular housing. The electrical stimulation circuit is formed through the conductivity of the annular housing itself, thus eliminating the need for circuit electrodes. The entire implantation device has a simple structure and is easy to manufacture. When the implantation device is implanted into the cerebral cortex or eyeball, compared to existing technologies, achieving the same stimulation effect requires only a smaller current intensity, thereby extending battery life.

[0009] According to some embodiments of the present invention, a connection hole is formed on the introduction portion of the flexible electrode, and a connection post is provided inside the annular housing, wherein the connection hole is electrically connected to the connection post.

[0010] According to some embodiments of the present invention, the connecting hole and the connecting post are connected by conductive adhesive.

[0011] According to some embodiments of the present invention, a connecting piece is formed extending outward from the introduction portion of the flexible electrode, the connecting hole is formed on the connecting piece, and at least one slit hole is formed on the sidewall of the connecting hole in a direction recessed away from the center of the connecting hole.

[0012] According to some embodiments of the present invention, there are multiple slit holes, each slit hole extends radially along the connecting hole, and the multiple slit holes are evenly spaced along the circumference of the connecting hole.

[0013] According to some embodiments of the present invention, the inner wall of the annular housing is provided with an inwardly extending extension, wherein the connecting post is connected to the end of the extension.

[0014] According to some embodiments of the present invention, the electronic device package further includes a coil, the top and bottom of the annular housing are open, the cover includes an upper cover and a lower cover, the upper cover is disposed at the top of the annular housing, the lower cover is disposed at the bottom of the annular housing, and a slit is formed on the annular housing.

[0015] According to some embodiments of the present invention, the material of the annular shell is pure titanium, titanium alloy, platinum, platinum alloy or platinum-iridium alloy, and the upper cover and the lower cover are ceramic parts, glass parts or polymer parts.

[0016] According to some embodiments of the present invention, at least one suture hook is provided on the outer wall of the annular housing, and the at least one suture hook is provided only on one side of the annular housing.

[0017] A visual prosthesis according to a second aspect of the present invention includes: an implantation device, wherein the implantation device is an implantation device according to the first aspect of the present invention described above, the implantation device being used for implantation in the brain or eye; and an external device, wherein the external device includes: a camera unit, a video processing unit, and a wireless signal transmitter, the camera unit being electrically connected to the video processing unit, the video processing unit being electrically connected to the wireless signal transmitter, and the wireless signal transmitter being connected to the implantation device for energy and data via wireless coupling.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is an exploded view of the implantation device according to an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 A schematic diagram showing the implantable device after assembly;

[0022] Figure 3 yes Figure 1 A perspective view of the annular shell shown;

[0023] Figure 4 yes Figure 1 A top view of the annular housing and flexible electrodes shown;

[0024] Figure 5 yes Figure 4 A schematic diagram of the flexible electrode shown;

[0025] Figure 6 yes Figure 5 An enlarged view of part A, shown in the center circle;

[0026] Figure 7 This is a schematic diagram of the implantation device according to an embodiment of the present invention being implanted into the eyeball;

[0027] Figure 8 This is a schematic diagram of the implantation device according to an embodiment of the present invention being implanted into the cerebral cortex;

[0028] Figure 9 This is a schematic diagram of a visual prosthesis according to an embodiment of the present invention.

[0029] Figure label:

[0030] 100: Implantable device;

[0031] 1: Outer shell;

[0032] 11: Annular shell; 111: Connecting post; 112: Extension;

[0033] 113: Sew-in opening; 114: Sewing hook; 115: Thread hole;

[0034] 1141: Connecting part; 1142: Hook part;

[0035] 12: Top cover; 13: Bottom cover;

[0036] 2: Flexible electrode; 21: Introduction part; 211: Connecting piece;

[0037] 2111: Connecting hole; 2112: Slot hole;

[0038] 22: Stimulating part; 23: Cable;

[0039] 3: Electronic device package; 31: Coil;

[0040] 200: External device; 210: Camera unit;

[0041] 220: Video processing unit; 230: Wireless signal transmitter;

[0042] 1000: Eyeball; 1001: Retina; 2000: Fixation pin; 3000: Cerebral cortex. Detailed Implementation

[0043] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0044] The following is for reference. Figures 1-8An implantation device 100 according to an embodiment of the first aspect of the present invention is described. This implantation device 100 is applicable to medical devices implanted in the human body, such as cochlear implants, retinal implants, spinal cord stimulators (for pain treatment), cortical stimulators, and deep brain stimulators (brain pacemakers). In the following description of the present invention, the implantation device 100 for cortical stimulation visual prostheses and retinal implants are primarily described as examples.

[0045] like Figures 1-8 As shown, the implantation device 100 according to a first aspect embodiment of the present invention includes a housing 1, a flexible electrode 2, and electronic components.

[0046] Specifically, the outer casing 1 includes an annular shell 11 and a cover that closes the annular shell 11, for example, referring to... Figures 1-2 and combined Figure 3 The annular shell 11 can be generally formed as a circumferentially extending annular structure, and the cover closes the open portion of the annular shell 11 (e.g., Figure 1 and Figure 3 The top and bottom of the annular housing 11 together define the receiving cavity. The annular housing 11 is a metal housing. In this case, the annular housing 11 is made of metal material to facilitate electrical connection with the introduction portion 21 of the flexible electrode 2.

[0047] The flexible electrode 2 includes an introduction portion 21, a cable, and a stimulation portion 22. The stimulation portion 22 may include a flexible substrate and multiple stimulation electrodes disposed on the flexible substrate. The flexible substrate serves to support and protect the stimulation electrodes. The ends of the multiple stimulation electrodes may be exposed on one side surface of the flexible substrate to stimulate the implantation site in the human body (e.g., the retina 1001, the cerebral cortex 3000, etc.). The multiple stimulation electrodes may be arranged in an array (e.g., in rows) within the flexible substrate.

[0048] The electronic device is connected to the introduction portion 21 of the flexible electrode 2 to form an electronic device package 3. The electronic device may include a circuit chip, such as an ASIC chip (Application-Specific Integrated Circuit), which processes the received data signals and emits electrical stimulation pulses to drive the stimulation electrode. The electronic device may also include electronic components such as capacitors, inductors, resistors, oscillators, filters, and memory, which may be provided according to the circuit design. The electronic device package 3 is located within the space formed by the annular shell 11 and the cover (i.e., the aforementioned accommodating cavity).

[0049] The introduction portion 21 of the flexible electrode 2 is electrically connected to the inner wall of the annular shell 11. When the implantation device 100 is driven by a positive voltage, it forms an electrical stimulation circuit that sequentially extends from the current drive output port inside the electronic device package 3, through the introduction portion 21 of the flexible electrode 2, the stimulation portion 22, the stimulated tissue, the annular shell 11, to the ground wire of the current drive circuit inside the electronic device package 3. When the implantation device 100 is driven by a reverse voltage, the current direction is opposite to that described above, and will not be repeated here.

[0050] For example, when the implantation device 100 is implanted into the eyeball 1000, the specific electrical stimulation process driven by the positive voltage can be as follows: After receiving the external radio frequency signal, the electronic device package 3 inside the housing 1 sends electrical pulse signals to the multiple stimulation electrodes of the stimulation part 22. The multiple stimulation electrodes apply current stimulation to the surface of the retina 1001 to help the patient obtain visual perception. At the same time, the current flows towards the low potential direction, that is, through the eyeball wall to the bottom end of the annular housing 11 fixed on the sclera. Since the introduction part 21 of the flexible electrode 2 is electrically connected to the inner wall of the annular housing 11, it can further flow to the electronic device package 3.

[0051] Therefore, a circuit loop can be formed without setting up a dedicated loop electrode, resulting in fewer components, a simple structure, and ease of manufacturing. Furthermore, since the stimulation current passes through the eyeball wall and can penetrate deeply into retinal cells, compared to the traditional method of setting loop electrodes on flexible electrodes, achieving the same stimulation effect requires only a smaller current intensity, thereby extending battery life, saving energy, and the stimulation electrodes on the stimulation part 22 only need to bear a smaller load, extending the lifespan of the flexible electrode 2.

[0052] According to some embodiments of the present invention, with reference to Figure 4 and Figure 5 and combined Figure 3 and Figure 6 A connecting hole 2111 is formed on the introduction portion 21 of the flexible electrode 2, and a connecting post 111 is provided inside the annular shell 11. The connecting hole 2111 is electrically connected to the connecting post 111. For example, in Figures 3-6 In the example, the connecting post 111 can be integrally formed inside the annular housing 11, and the connecting post 111 can extend along the axial direction of the annular housing 11. The connecting hole 2111 penetrates the introduction portion 21 of the flexible electrode 2 along the thickness direction of the introduction portion 21.

[0053] Furthermore, the connecting hole 2111 of the inlet portion 21 is connected to the connecting post 111 by conductive adhesive. The conductive adhesive is easy to adhere between the sidewall of the connecting hole 2111 and the outer peripheral wall of the connecting post 111, and after curing, it further improves the reliability of the electrical connection between the inlet portion 21 and the annular housing 11.

[0054] Specifically, refer to Figure 4 and Figure 5 and combined Figure 6 A connecting piece 211 extends outward from the introduction portion 21, and a connecting hole 2111 is formed on the connecting piece 211. For example, in Figures 4-6 In the example, the connecting piece 211 is arranged at the edge of the introduction portion 21. One end of the connecting piece 211 is connected to the edge of the introduction portion 21, and the other end of the connecting piece 211 is spaced apart from the surface of the introduction portion 21, which facilitates the arrangement of electronic devices and reduces the overall size.

[0055] like Figures 4-6 As shown, at least one slot hole 2112 is formed on the sidewall of the connecting hole 2111, recessed towards the center away from the connecting hole 2111. Specifically, the slot hole 2112 penetrates the connecting piece 211 along the thickness direction of the connecting piece 211, and one end of the slot hole 2112 communicates with the connecting hole 2111. This prevents stress concentration, and conductive adhesive can also enter the slot hole 2112, thereby further improving the reliability of the electrical connection between the connecting post 111 and the connecting hole 2111. The connecting post 111 and the connecting hole 2111 can be interference-fitted or transition-fitted.

[0056] Optionally, refer to Figure 6 The number of slot holes 2112 is plurality of, each slot hole 2112 extending radially along the connecting hole 2111, and the plurality of slot holes 2112 are evenly spaced along the circumference of the connecting hole 2111. The included angle between any two adjacent slot holes 2112 is equal. This arrangement of slot holes 2112 allows the connecting hole 2111 to undergo greater deformation, and the stress on the connecting hole 2111 can be more uniform. In the description of the present invention, "plurality" means two or more.

[0057] Alternatively, the slot hole 2112 can, in addition to being able to Figure 6 In addition to the straight holes shown, there can also be curved holes (such as arc holes, wavy holes, etc.), zigzag holes (such as W-shaped holes, etc.).

[0058] According to some embodiments of the present invention, such as Figure 3 and Figure 4 As shown, the inner wall of the annular housing 11 is provided with an inwardly extending portion 112, wherein the connecting post 111 is connected to the end of the extension portion 112 (e.g., Figure 3 (Inner end of the extension 111). The lower end of the connecting post 111 is connected to the inner end of the extension 112 and extends upward, so that the connecting post 111 can pass through the connecting hole 2111 on the introduction part 21 during the process of placing the electronic device package 3 into the annular housing 11, thereby improving the assembly efficiency.

[0059] According to some embodiments of the present invention, such as Figure 1 , Figure 3 and Figure 4 As shown, the electronic device package 3 also includes a coil 31. The top and bottom of the annular housing 11 are open. The cover includes an upper cover 12 and a lower cover 13. The upper cover 12 is located at the top of the annular housing 11, and the lower cover 13 is located at the bottom of the annular housing 11. A slit 113 is formed on the annular housing 11. The slit 113 does not obstruct signal communication, avoids eddy currents in the coil 31, and ensures stable and reliable transmission of the radio frequency signal of the coil 31. For example, when the implantation device 100 is implanted into the eyeball 1000, even if the eyeball 1000 moves or the distance between the external coil and the electronic device package 3 is large, stable and reliable signal transmission can still be guaranteed. It should be noted that if the coil 31 is not placed inside the annular housing 11, the annular housing 11 may not have a slit.

[0060] For example, in Figure 1 , Figure 3 and Figure 4 In the example, the upper cover 12 and the lower cover 13 respectively enclose the top and bottom of the annular shell 11. The upper cover 12 can be formed as a curved surface concave away from the lower cover 13, and the lower cover 13 can be formed as a curved surface concave towards the upper cover 12. Thus, when the implantation device 100 is implanted into the eyeball 1000, since the lower cover 13 is constructed as a curved surface that matches the sclera, it can better fit the sclera. Furthermore, since the upper cover 12 also has a corresponding curved surface structure and is located between the eyelid and the sclera, it can reduce the patient's foreign body sensation.

[0061] Optionally, the material of the annular shell 11 may be pure titanium, titanium alloy, platinum, platinum alloy, platinum-iridium alloy, or other metals, and the upper cover 12 and lower cover 13 may be ceramic, glass, or polymer (such as polyetheretherketone) parts, but are not limited to these.

[0062] The coil 31 is used to receive data and energy, and there can be one or more coils. For example, the coil 31 may include an internal data coil and an internal energy coil, which are used to receive data and energy from the external coil, respectively.

[0063] According to a further embodiment of the present invention, referring to Figure 2 A wire-passing hole 115 is formed on the annular shell 11, through which the flexible electrode 2 can pass. A slit 113 is connected to the wire-passing hole 115 and is in an inverted T-shape. This inverted T-shaped hole penetrates the top and bottom of the annular shell 11, effectively preventing eddy currents in the coil 31 while allowing the flexible electrode 2 to extend out of the outer shell 1 through the wire-passing hole 115. Alternatively, the slit 113 can also penetrate the top and bottom of the annular shell 11 and be circumferentially spaced from the wire-passing hole 115 (not shown in the figure).

[0064] According to some embodiments of the present invention, such as Figure 3As shown, at least one suture hook 114 is provided on the outer wall of the annular housing 11, and the at least one suture hook 114 is provided only on one side of the annular housing 11. For example, in Figure 3 The example shows two suture hooks 114. The outer shell 1 can be securely sutured to the tissue to be sutured (such as the sclera) by means of sutures using the suture hooks 114. The side of the annular shell 11 without suture hooks 114 (e.g., Figure 3 The upper part of the implant (usually located between the two rectus muscles in the superior temporal quadrant) can be fixed by wrapping it with the conjunctiva outside the sclera, ensuring 100% fixation of the implant while reducing the number of suture points. Specifically, refer to... Figure 3 Each stitching hook 114 may include a connecting portion 1141 connected to the annular housing 11 and a hook portion 1142 connected to the free end of the connecting portion 1141. Since the hook portion 1142 adopts a non-closed-loop structure, eddy currents in the coil 31 can be further avoided.

[0065] Furthermore, the space between the outer casing 1 and the electronic device package 3 is filled with sealant, which further ensures the sealing and corrosion resistance of the implanted device 100. The sealant can be filled into the space between the outer casing 1 and the electronic device package 3 through the slit 113. Optionally, the sealant is silicone or epoxy, but not limited to these.

[0066] Furthermore, a cable 23 connects the introduction portion 21 and the stimulation portion 22 of the flexible electrode 2, such as... Figures 1-2 and Figures 4-5 As shown. During installation, cable 23 can pass through cable hole 115 to extend outside the housing.

[0067] The implantation device 100 according to the embodiments of the present invention can significantly reduce the size of the implantation device 100 while ensuring the stable and reliable function of each part. For example, the part of the implantation device 100 located outside the eye only needs to cover one quadrant of the sclera (generally the superior temporal quadrant) for implantation.

[0068] The following is combined with Figure 7 The process of implanting the implantation device 100 according to an embodiment of the present invention into the eyeball 1000 (i.e., as a retinal implant) is described.

[0069] First, the annular shell 11 is sutured to the superior temporal quadrant of the sclera, ensuring the distance between the suture hook 114 and the limbus is maintained. Then, a vitrectomy is performed, and an incision is made in the superior temporal quadrant of the sclera. The stimulation portion 22 of the flexible electrode 2 is introduced into the eyeball 1000 through this incision, and the stimulation portion 22 is fixed to the macular region of the retina 1001 using fixation pins 2000. This implantation procedure is simple, causes minimal trauma to the eye, avoids compression of the vortex veins of the eyeball, has few postoperative complications, and reduces the patient's foreign body sensation.

[0070] The following is combined with Figure 8 The process of implanting the implantation device 100 according to an embodiment of the present invention into the cerebral cortex 3000 is described.

[0071] First, a portion of the skull is removed to create a hollow area. Then, the stimulation part 22 is implanted into the surface of the cerebral cortex 3000, and the outer shell 1 is implanted into the hollow area of ​​the skull, or onto the skull and below the scalp. Generally, the stimulation part 22 with stimulation electrodes can be implanted into the V1 area of ​​the visual cortex, or it can partially cover the V2 or V3 areas. It is worth noting that the V1, V2, and V3 areas of the visual cortex mentioned here are common regional divisions within the brain's visual domain, and will not be explained in detail here.

[0072] like Figure 9 As shown, a visual prosthesis according to a second aspect embodiment of the present invention includes an implantation device 100 and an external device 200. The implantation device 100 is the same as the implantation device 100 described in the first aspect embodiment of the present invention. The implantation device 100 is for implantation into the brain or eye, and the stimulation portion 22 of the flexible electrode 2 can be used to stimulate the visual cortex or retinal cells.

[0073] The external device 200 includes a camera unit 210, a video processing unit 220, and a wireless signal transmitter 230. The camera unit 210 is electrically connected to the video processing unit 220, and the video processing unit 220 is electrically connected to the wireless signal transmitter 230. The wireless signal transmitter 230 is connected to the implanted device 100 for energy and data through wireless coupling, for example, through an external coil to wirelessly transmit data and energy to the coil 31 in the implanted device 100.

[0074] Other configurations and operations of the implantation device 100 and visual prosthesis according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0075] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An implantable device, characterized in that, include: The outer casing includes an annular shell and a cover that closes the annular shell. The annular shell is a metal shell. The annular shell has a slit and a thread-passing hole. The slit and the thread-passing hole are interconnected and form an inverted T shape. At least one sewing hook is provided on the outer wall of the annular shell. The sewing hook includes a connecting part that connects to the annular shell and a hook part that connects to the free end of the connecting part. The hook part has a non-closed-loop structure. A flexible electrode, comprising an introduction portion, a cable, and a stimulation portion, wherein the flexible electrode passes through the through-hole; An electronic device is connected to the introduction portion of the flexible electrode to form an electronic device package. The electronic device package includes a coil and is located within the space formed by the annular shell and the cover. The introduction portion is electrically connected to the inner wall of the annular shell. When driven by a positive voltage, the implantation device forms an electrical stimulation circuit sequentially from the current drive output port within the electronic device package, the introduction portion of the flexible electrode, the stimulation portion, the stimulated tissue, the annular shell, to the ground wire of the current drive circuit within the electronic device package.

2. The implantation device according to claim 1, characterized in that, A connection hole is formed on the introduction portion of the flexible electrode, and a connection post is provided inside the annular shell. The connection hole is electrically connected to the connection post.

3. The implantation device according to claim 2, characterized in that, The connecting hole and the connecting post are connected by conductive adhesive.

4. The implantation device according to claim 2, characterized in that, A connecting piece extends outward from the introduction portion of the flexible electrode, a connecting hole is formed on the connecting piece, and at least one slit hole is formed on the sidewall of the connecting hole that is recessed toward the center of the connecting hole.

5. The implantation device according to claim 4, characterized in that, The number of the slit holes is multiple, each of the slit holes extends radially along the connecting hole, and the multiple slit holes are evenly spaced along the circumference of the connecting hole.

6. The implantation device according to claim 2, characterized in that, The inner wall of the annular shell is provided with an inwardly extending portion, wherein the connecting post is connected to the end of the extension portion.

7. The implantation device according to any one of claims 1-6, characterized in that, The top and bottom of the annular shell are both open. The cover includes an upper cover and a lower cover. The upper cover is located at the top of the annular shell, and the lower cover is located at the bottom of the annular shell.

8. The implantation device according to claim 7, characterized in that, The material of the annular shell is pure titanium, titanium alloy, platinum, platinum alloy or platinum-iridium alloy, and the upper cover and the lower cover are ceramic, glass or polymer parts.

9. The implantation device according to any one of claims 1-6, characterized in that, The at least one suture hook is provided only on one side of the annular housing.

10. A visual prosthesis, characterized in that, include: An implantable device, wherein the implantable device is an implantable device according to any one of claims 1-9, the implantable device being used for implantation in the brain or eye; An external device, comprising: a camera unit, a video processing unit, and a wireless signal transmitter, wherein the camera unit is electrically connected to the video processing unit, the video processing unit is electrically connected to the wireless signal transmitter, and the wireless signal transmitter is connected to the implanted device for energy and data via wireless coupling.

Images