Degradable occluder implant system

Abstract

The application relates to a degradable occluder implantation system, which comprises an occluder body composed of an upper disc, a lower disc and a hollow waist, the upper disc, the lower disc and the waist are formed by weaving wires made of degradable materials, an upper connecting piece comprises an upper connecting part and an upper combining part, a lower connecting piece comprises a lower connecting part and a lower combining part, a conveying device comprises a core connecting piece, a sleeve connecting piece and an outer sheath, the sleeve connecting piece is coaxially movably arranged in the outer sheath, a channel is formed in the middle of the sleeve connecting piece, the core connecting piece is movably arranged in the channel, the upper end of the core connecting piece is detachably connected with the upper connecting part, and the sleeve connecting piece is detachably connected with the lower connecting part. The application pulls the upper connecting piece to move in the inner side of the waist through the core connecting piece, so that the upper connecting piece and the lower connecting piece are close to and combined together, the upper disc and the lower disc are unfolded and attached to the atrial septum, the problem of poor occlusion effect of the degradable occluder is solved, and the risk of thrombus shedding is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device structural design technology, specifically to a biodegradable occluder implantation system. Background Technology

[0002] The main treatments for patients with congenital heart disease are currently open-chest surgery and percutaneous interventional surgery. Open-chest surgery uses patches or simple sutures to repair the heart defect, while percutaneous interventional surgery involves implanting a NiTi alloy occluder under X-ray visualization to close the defect. With the development of technology, minimally invasive open-chest surgery has become a new hybrid surgical method that combines the advantages of both open-chest surgery and percutaneous interventional surgery. It avoids the large trauma of open-chest surgery and avoids X-ray radiation. The implantation of the NiTi occluder and the closure of the defect can be completed under ultrasound guidance alone. However, NiTi occluders have some problems due to their metallic material, such as metal corrosion, nickel ion release, nickel ion allergies in a few patients, conduction block, metal residue affecting subsequent cardiac interventional procedures, and the impact of metal implants on MRI scans. In addition, the first clinical implantation of a NiTi alloy occluder was more than 20 years ago, and its long-term safety remains questionable. Therefore, the development of biodegradable occluders has great potential.

[0003] Biodegradable occluders are made of either biodegradable metals or biodegradable polymers. However, regardless of whether the occluder is made of metal or polymer, it cannot fully return to its unfolded shape after being released from the delivery sheath. The disc cannot conform to the atrial septum, making leakage at the atrial septum easy. Figure 1 The diagram shows the state of the occluder discs 102 and 103 and the atrial septum 101 in their ideal deployed state. At this point, the occluder discs 102 and 103 are in their pre-designed fully deployed shape and conform to the two sidewalls of the atrial septum 101, as shown. Figure 2 The diagram shows the unfolded state of a traditional biodegradable occluder. Because the occluder is made of biodegradable material, it does not have good shape memory properties. Its discs 202 and 203 cannot be fully unfolded, making it unable to return to its designed shape and fit the sidewall of the atrial septum 201. This greatly reduces the occlusion effect of the biodegradable occluder and increases the risk of thrombus dislodgement. Therefore, it is necessary to design an auxiliary structure to help the occluder return to its shape and fit the atrial septum. Summary of the Invention

[0004] Based on the above description, the present invention provides a biodegradable occluder implantation system to solve the technical problem that occluders made of biodegradable materials in the prior art cannot fully expand in the patient's body due to poor memory performance, resulting in reduced occlusion effect and increased safety risks.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0006] A biodegradable occluder implantation system includes an occluder body consisting of an upper plate, a lower plate, and a hollow waist section, wherein the upper plate, lower plate, and waist section are woven from biodegradable material, and further includes:

[0007] An upper connector connected to the middle of the upper plate includes an upper connecting part and an upper joining part;

[0008] A lower connector connected to the middle of the lower plate includes a lower connecting part and a lower joining part;

[0009] A conveying device includes a core connector, a sleeve connector, and an outer sheath. The sleeve connector is coaxially and movably disposed on the outer sheath. A channel is formed in the middle of the sleeve connector. The core connector is movably disposed in the channel. The upper end of the core connector is detachably connected to the upper connecting part. The sleeve connector is detachably connected to the lower connecting part. The core connector can pull the upper connector to move inside the waist to connect the upper connecting part and the lower connecting part.

[0010] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0011] The biodegradable occluder implantation system provided in this application adds an upper connector and a lower connector to the traditional biodegradable occluder. Through a specially designed delivery device, the upper end of the core connector is detachably connected to the upper connector, and the cannula connector is detachably connected to the lower connector. Then, the core connector pulls the upper connector to move on the inner side of the waist, causing the upper and lower connectors to come closer and combine with each other. This causes the middle parts of the upper and lower plates to come closer to each other, allowing the upper and lower plates to unfold and fit against the atrial septum, enabling the occluder to effectively block the foramen ovale. This solves the problem of poor occlusion effect of biodegradable occluders and also reduces the risk of thrombus dislodgement from the protruding plate surface.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the lower connecting portion includes a first threaded hole formed at the lower end of the lower connecting member, and the side wall of the sleeve connecting member near the upper end is formed with a first external thread that mates with the first threaded hole.

[0014] Furthermore, the core connector includes a mandrel, the upper connecting portion includes a second threaded hole formed at the lower end of the upper connector, and the sidewall of the mandrel near the upper end has a second external thread that mates with the second threaded hole.

[0015] Furthermore, the upper connecting portion includes a snap fastener formed near the lower end of the upper connector, and the lower connecting portion includes a slot formed at the upper end of the lower connector, wherein the snap fastener can enter the slot and engage with the slot.

[0016] Furthermore, the upper connecting portion includes an external connecting thread formed on the side wall of the upper connector near the lower end, and the lower connecting portion includes a connecting threaded hole formed on the upper end of the lower connector. The external connecting thread and the connecting threaded hole are engaged, and the threads of the external connecting thread and the second threaded hole are opposite in direction.

[0017] Furthermore, the core connector includes a core wire, the upper connecting portion includes a connecting hole formed at the lower end of the upper connector, the connecting hole laterally penetrates the upper connector, the core wire can pass through the connecting hole and bend back to the channel, the upper connecting portion includes a buckle formed near the lower end of the upper connector, and the lower connecting portion includes a slot formed at the upper end of the lower connector, the buckle can enter the slot and engage with the slot.

[0018] Furthermore, the upper connector includes a connecting body and multiple connecting wires. A through hole is formed in the middle of the connecting body. The first ends of the multiple connecting wires are knotted at the upper opening of the through hole to form an upper knot and knotted at the lower opening of the through hole to form a lower knot. The upper knot and the lower knot fix the connecting body to the connecting wires. The connecting hole is formed by the connecting wires at the lower end of the lower knot. The second ends of the connecting wires are all connected to the upper plate.

[0019] Furthermore, the second end of one of the connecting lines is connected to the middle of the upper plate, and the connection points of the second ends of the remaining connecting lines to the upper plate are eccentrically positioned relative to the upper plate.

[0020] Furthermore, when some of the connection points are located at the edge of the upper plate, the occluder body also includes a wire control frame, which includes multiple wire control rods. One end of each wire control rod is located at the upper center of the upper plate, and the other end extends radially along the upper plate to near the edge of the upper plate. Both ends of each wire control rod are connected to the upper plate, and all the wire control rods are evenly distributed inside the upper plate along the center of the upper plate.

[0021] Furthermore, the remote control lever is made of a biodegradable alloy. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the occluder under ideal deployment conditions.

[0023] Figure 2 This is a schematic diagram of the unfolding and rotation of a biodegradable plug in the prior art;

[0024] Figure 3 This is a schematic diagram of a biodegradable occluder implantation system provided in an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the structure of the upper connector and the lower connector in the first embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the conveying device in the first embodiment of this application;

[0027] Figure 6 This is a schematic diagram of the upper connecting member structure of the plugger in the first embodiment of this application, which is a double-riveted structure;

[0028] Figure 7 This is a schematic diagram of the structure of the upper connector and the lower connector in the second embodiment of this application;

[0029] Figure 8 This is a schematic diagram of the upper connector and conveying device in the third embodiment of this application;

[0030] Figure 9 This is a schematic diagram of the upper connector in the fourth embodiment of this application;

[0031] Figure 10 This is a top view of the main body of the plugging device in the fourth embodiment of this application. Detailed Implementation

[0032] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0034] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "under" or "below" of other elements or features will be oriented "over" of other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90° or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0035] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0036] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0037] like Figure 3 As shown, this application provides a biodegradable occluder implantation system, which includes two main parts: an occluder 100 and a delivery device 200. The occluder 100 includes an upper plate 110, a lower plate 120, a waist section 130, an upper connector 140, and a lower connector 150. The upper plate 10, the lower plate 20, and the hollow waist section 30 constitute the main body of the occluder. The upper plate 110, the lower plate 120, and the waist section 130 are woven from biodegradable materials.

[0038] The biodegradable materials involved in this application can be biodegradable metallic materials or biodegradable polymer materials. These two types of materials are commonly used in the prior art to make plugs.

[0039] The upper connector 140 is connected to the middle part of the upper plate 110, and includes an upper connecting part 141 and an upper connecting part 142;

[0040] The lower connector 150 is connected to the middle part of the lower plate 120, and includes a lower connecting part 151 and a lower connecting part 152.

[0041] The conveying device 200 includes a core connector 210, a sleeve connector 220, and an outer sheath 230. The sleeve connector 220 is coaxially and movably disposed on the outer sheath 230. A channel 220a is formed in the middle of the sleeve connector 220. The core connector 210 is movably disposed on the channel 220a. The upper end of the core connector 210 is detachably connected to the upper connecting part 141. The sleeve connector 220 is detachably connected to the lower connecting part 151. By pulling the core connector 210, the upper connector 140 can be moved inside the waist 130 to connect the upper connecting part 142 and the lower connecting part 152.

[0042] It is understandable that the sleeve connector 220 and the lower connection part 151 can be detachably connected in various ways, including but not limited to threaded connection and snap-fit ​​connection.

[0043] As a first embodiment of this application, combined with Figure 3-5 As shown, the lower connecting part 151 includes a first threaded hole 151a formed at the lower end of the lower connecting member 150. The side wall of the sleeve connecting member 220 near the upper end has a first external thread 22a that mates with the first threaded hole 151a. That is, the sleeve connecting member 220 and the lower connecting member 150 can be connected and separated by rotating the sleeve connecting member 220. The sleeve connecting member 220 can be a hollow steel cable.

[0044] The core connector 210 includes a spindle 211, and the upper connecting part 141 includes a second threaded hole 141a formed at the lower end of the upper connector 140. The side wall of the spindle 211 near the upper end has a second external thread 21a that mates with the second threaded hole 141a. That is, the connection and separation of the spindle 211 and the upper connector 140 are achieved by rotating the spindle 211.

[0045] Based on the above structure, the upper connecting part 142 includes a buckle 142a formed near the lower end of the upper connector 140, and the lower connecting part 152 includes a slot 152a formed at the upper end of the lower connector 150. The buckle 142a can enter the slot 152a and engage with the slot 152a.

[0046] In this embodiment, during use, the sheath connector 220 and the core connector 210 are connected to the handle 240 located near the end of the delivery device 200. The occluder 100 is pre-installed in the delivery device 200 and connected to relevant components. The occluder 100 is pushed to the target position (corresponding to the atrial septum) by operating the handle 240 and released from the outer sheath 230. Then, the upper connector 140 and the lower connector 150 are brought close together and connected to complete the tightening of the upper plate 110 and the lower plate 120 and fit against the atrial septum. Finally, the delivery device 200 is withdrawn from the body.

[0047] Specifically, externally, the second threaded hole 141a is connected to the second external thread 21a on the mandrel 211, and the first threaded hole 151a is connected to the first external thread 22a on the steel cable. After entering the target position inside the body, the mandrel 211 is retracted relative to the steel cable, causing the upper connector 140 to move downward until the buckle 142a enters the slot 152a and engages with the slot 152a. Then, the mandrel 211 is rotated to release it, and the mandrel 211 is withdrawn. The steel cable is then rotated to release it, thus completing the release of the occluder.

[0048] Understandably, during input, the spindle 211 and the steel cable are locked by the locking structure on the handle 240 (not shown in the figure) and cannot move relative to each other. When it is necessary to retract the spindle 211 to move the upper connector 140 downward, the locking structure on the handle 240 can be unlocked to pull the spindle 211. When the spindle 211 moves downward a specified distance, it will be locked again by the handle 240, indicating that the upper connector 140 and the lower connector 150 have been engaged. At this time, the spindle 211 can be rotated to separate it from the upper connector 140 and withdraw it.

[0049] The side of the lower connector 150 can be designed with a threaded structure or a frosted surface, which is beneficial for welding or crimping the plug wire ends there, ensuring the connection strength between the lower plate 120 and the lower connector 150. During the braiding process, the plug body generally has two common structures: one is a single-riveted structure, where the upper plate 110 has no rivets. In this case, the upper connector 140 can be designed with a groove 143 near the top, and the upper end face of the upper plate 110 can be inserted into the groove, making the upper connector 140 and the upper plate 110 a single unit; the other is a double-riveted structure, where both the upper plate 110 and the lower plate 120 have rivets. In this case, combined with… Figure 6 As shown, the wire end of the upper plate 110 can be bound in the top groove 144 of the upper connector 140. The upper connector 140 can be completely placed inside the occluder 100 without protruding outside the upper plate 110, reducing the risk of thrombus dislodgement. The lower connector 150 can also be completely placed inside the occluder 100. Preferably, the upper connector 140 and the lower connector 150 are made of biodegradable metal or modified biodegradable polymer material to ensure that the strength required for use is met.

[0050] As a second embodiment of this application, combined with Figure 3 , Figure 4 and Figure 7 As shown, the difference from the first embodiment is that the upper connecting part 142 includes an external connecting thread 142b formed on the side wall of the upper connector 140 near the lower end, and the lower connecting part 152 includes a connecting threaded hole 152b formed on the upper end of the lower connector 150. The external connecting thread 142b and the connecting threaded hole 152b are engaged. The threads of the external connecting thread 142b and the second threaded hole 141a have opposite directions. Correspondingly, the lower connecting part 151 and the steel cable still adopt the connection method of external thread and threaded hole, but for ease of operation, the positions of the external thread and threaded hole are changed.

[0051] In this embodiment, the second threaded hole 141a is connected to the second external thread 21a on the mandrel 211 externally, and the first threaded hole 151a is connected to the first external thread 22a on the steel cable externally. After entering the target position internally, the mandrel 211 is withdrawn to bring the upper connector 140 into contact with the lower connector 150. Then, the mandrel 211 is rotated to make the external engagement thread 142b and the engagement threaded hole 152b achieve threaded connection between the upper connector 140 and the lower connector 150. After the connection is tightened, the mandrel 211 is rotated in the opposite direction to disengage the mandrel 211 from the upper connector 140 and withdraw the mandrel 211. Then, the steel cable is rotated to release the plug.

[0052] The external mating thread 142b and the second threaded hole 141a have opposite thread directions, which can prevent the spindle 211 from disengaging from the upper connector 140 in advance when the upper connector 140 and the lower connector 150 are connected by the rotating spindle 211. In addition, a locking and anti-slip structure can be designed on the lower end face of the upper connector 140 and the bottom surface of the mating threaded hole 152b to ensure the locking effect between the upper connector 140 and the lower connector 150.

[0053] As a third embodiment of this application, combined with Figure 3 , Figure 4 and Figure 8 As shown, the difference from the first embodiment is that the core connector 210 includes a core wire 212, and the upper connector 141 includes a connecting hole 141b formed at the lower end of the upper connector 140. The connecting hole 141b extends laterally through the upper connector 140, and the core wire 212 can pass through the connecting hole 141b and then bend back to the channel 220a.

[0054] In use, the core wire 212 is pre-passed through the connecting hole 141b and fixed at both ends to the handle 240 of the conveying device. After the blocker 100 is conveyed to the target position, the core wire 212 is pulled back to connect the upper connector 140 and the lower connector 150 through a buckle. Then, one end of the core wire 212 is released at the handle 240, and the other end of the core wire 212 is pulled to remove the wire. Then, the steel cable is rotated to release the blocker.

[0055] As a variation of this embodiment, the connecting hole 141b can also be designed as a solid ball, and the core wire 212 can be fixed to the upper connector 140 by means of a sleeve connection.

[0056] As a fourth embodiment of this application, combined with Figure 3 , Figure 4 , Figure 8 and Figure 9 As shown, the difference between this embodiment and the third embodiment is that the upper connector 140 includes a connecting body 1401 and multiple connecting wires 1402. A through hole 140a is formed in the middle of the connecting body 1401. The first ends of the multiple connecting wires 1402 are knotted at the upper opening of the through hole 140a to form an upper knot 1403 and knotted at the lower opening of the through hole 140a to form a lower knot 1404. The upper knot 1403 and the lower knot 1404 fix the connecting body 1401 to the connecting wires 1402. The connecting hole 141b is formed by the connecting wires 1402 at the lower end of the lower knot 1404. The second ends of the connecting wires 1402 are all connected to the upper plate 110.

[0057] The second end of the connecting wire 1402 can be connected to the upper plate 110 at multiple points. Preferably, each connecting wire 1402 is connected to the upper plate 110 at a different location. Figure 10 As shown, and preferably implemented by combining the inner ring part m, the outer ring part n, and the center position part p, so that when the lower line knot 1404 is pulled, the upper plate 110 can better fit closer to the room interval.

[0058] Preferably, the second end of one of the connecting lines 1402 is connected to the middle of the upper plate 110, and the connection points 1405 of the other connecting lines 1402 with the upper plate 110 are eccentrically set relative to the upper plate 110. When the connecting body 1401 moves, the connecting lines 1402 pull the entire upper plate 110 downward, causing the upper plate 110 to move closer to the lower plate 120, thus improving the fit quality.

[0059] In practical use, it was found that when the connection point 1405 is eccentrically distributed on the upper plate 110, when the connecting line 1402 is pulled to bring the upper connector 140 and the lower connector 150 closer together, the upper surface of the upper plate 110 will be concave in the middle due to the driving force of the connecting line 1402, and the edge may be raised. This will result in a poor fit between the upper plate 110 and the room partition. Therefore, it is preferable to set the connection point 1405 at the edge of the upper plate 110. This can effectively avoid the concavity in the middle and ensure a good fit.

[0060] However, in actual operation, when the connection point 1405 is located at the edge of the upper plate 110, pulling the connecting line 1402 will occasionally cause the edge of the upper plate 110 to move towards the center, making the upper plate 110 bulky and reducing the outer diameter of the upper plate 110, thus reducing the contact area between the upper plate 110 and the interatrial septum. At the same time, the end face of the upper plate 110 will have unevenness or wrinkles, which will also reduce the sealing effect. In order to overcome the above-mentioned possible problems, the main body of the occluder introduces a wire control frame 160. The wire control frame 160 includes multiple wire control rods 161. One end of the wire control rod 161 is located at the upper center of the upper plate 110, and the other end extends radially along the upper plate 110 to near the edge of the upper plate 110. Both ends of the wire control rod 161 are connected to the upper plate 110, and all the wire control rods 110 are evenly distributed inside the upper plate 110 along the center.

[0061] With the above structure, when the connecting line 1402 is pulled to bring the upper connecting member 140 and the lower connecting member 150 closer together, the wire control frame 160, which is composed of multiple wire control rods 161, can effectively support the middle of the upper end face of the upper plate 110. Under the action of the wire control rods 161, the upper end face of the upper plate 110 is opened up, restricting the edge from moving towards the center, and at the same time, no dent will occur, thus realizing the edge wire control of the upper plate.

[0062] More preferably, the control rod is a biodegradable alloy structure, so that the plug can be fully degraded.

[0063] In summary, the biodegradable occluder implantation system provided in this application uses the core connector 210 to pull the upper connector 140 to move on the waist 130 side, causing the upper connector 140 and the lower connector 150 to approach and combine with each other. This causes the middle parts of the upper plate 110 and the lower plate 120 to approach each other, allowing the upper plate 110 and the lower plate 120 to unfold and fit against the atrial septum, enabling the occluder to effectively block the foramen ovale. This solves the problem of poor occlusion effect of biodegradable occluders and also reduces the risk of thrombus dislodgement from the protruding plate surface.

[0064] 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 should be included within the protection scope of the present invention.

Claims

1. A biodegradable occluder implantation system, comprising an occluder body consisting of an upper plate, a lower plate, and a hollow waist section, wherein the upper plate, lower plate, and waist section are woven from biodegradable material, characterized in that, Also includes: An upper connector connected to the middle of the upper plate includes an upper connecting part and an upper joining part; A lower connector connected to the middle of the lower plate includes a lower connecting part and a lower joining part; A conveying device includes a core connector, a sleeve connector, and an outer sheath. The sleeve connector is coaxially and movably disposed on the outer sheath. A channel is formed in the middle of the sleeve connector. The core connector is movably disposed in the channel. The upper end of the core connector is detachably connected to the upper connecting part. The sleeve connector is detachably connected to the lower connecting part. The core connector can pull the upper connector to move inside the waist to connect the upper connecting part and the lower connecting part. The lower connecting portion includes a first threaded hole formed at the lower end of the lower connector, and the sidewall of the sleeve connector near the upper end has a first external thread that mates with the first threaded hole; the core connector includes a core wire, the upper connecting portion includes a connecting hole formed at the lower end of the upper connector, the connecting hole laterally penetrating the upper connector, the core wire passing through the connecting hole and then bending back to the channel, the upper connecting portion includes a snap-fit ​​formed at the lower end of the upper connector, and the lower connecting portion includes a snap-fit ​​formed at the lower end of the sleeve connector. The upper connector has a slot at its upper end, and the buckle can enter and engage with the slot. The upper connector includes a connecting body and multiple connecting wires. A through hole is formed in the middle of the connecting body. The first ends of the multiple connecting wires are knotted at the upper opening of the through hole to form an upper knot and knotted at the lower opening of the through hole to form a lower knot. The upper knot and the lower knot fix the connecting body to the connecting wires. The connecting hole is formed by the connecting wire at the lower end of the lower knot. The second ends of the connecting wires are all connected to the upper plate.

2. The biodegradable occluder implantation system according to claim 1, characterized in that, One of the connecting lines has its second end connected to the middle of the upper plate, while the connection points of the second ends of the remaining connecting lines to the upper plate are eccentrically positioned relative to the upper plate.

3. The biodegradable occluder implantation system according to claim 2, characterized in that, When some of the connection points are located at the edge of the upper plate, the occluder body also includes a wire control frame, which includes multiple wire control rods. One end of each wire control rod is located at the upper center of the upper plate, and the other end extends radially along the upper plate to near the edge of the upper plate. Both ends of each wire control rod are connected to the upper plate, and all the wire control rods are evenly distributed inside the upper plate along the center of the upper plate.

4. The biodegradable occluder implantation system according to claim 3, characterized in that, The remote control lever is made of a biodegradable alloy.

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