Plugging device

Abstract

The invention discloses a plugging device, and relates to the technical field of medical instruments. The plugging device comprises a plugging body, an elastic connecting piece and a hanging part, the plugging body is suitable for being matched with the shape of a target plugging area; one end of the elastic connecting piece is arranged on the plugging body; one end of the hanging part is connected with the other end of the elastic connecting piece, and the hanging part is suitable for being hung on the tissue of the target plugging area. The plugging device which is made of degradable materials and is made for the cauliflower-shaped left auricle can be implanted into the left auricle of a patient through minimally invasive catheter interventional operation to plug the left auricle, climbing and covering of endothelial tissue of a left atrium are guided, then complete degradation of an instrument in a human body after endothelialization is achieved, and the left auricle plugging effect is achieved. And finally, the plugging effect is completely realized by the autologous tissue of the patient, the formation and falling of thrombus emboli in the left atrial appendage are effectively prevented, and the occurrence risk of cerebral apoplexy diseases is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a blocking device. Background Art

[0002] Atrial fibrillation (AF) is a common persistent arrhythmia in clinical practice. It is a common heart disease in the elderly population. The incidence of AF increases with age. One of the main hazards of AF is the induction of left atrial thrombus formation.

[0003] The left atrial appendage is a small sac protruding to the right front side of a corner of the left atrium. It is an original tissue structure of the heart and a remnant of the original left atrium in the embryonic period. However, its internal structure is different from that of the mature left atrium. The left atrial appendage is not a cavity like the left atrium. It has a very rich pectinate muscle and trabeculae, which leads to a considerable number of channels and recesses inside it, forming a "honeycomb" structure. Long-term clinical practice and research have found that the unique structure of the left atrial appendage has become the main site of thrombosis in patients with atrial fibrillation. The special structure of the left atrial appendage causes the blood flow in the left atrial appendage to slow down. In extreme cases, turbulence may even form, causing some blood to stagnate, accumulate for a long time, and eventually coagulate to form a thrombus. Due to the instability of blood flow in patients with atrial fibrillation, the risk of blood stagnation and coagulation in the left atrial appendage is greatly increased, causing it to become a "thrombus embolus base" in the patient's body. Although these thrombi are formed in the left atrial appendage, there is still a greater risk of detachment and running to other parts of the body with the blood, causing blood vessel blockage. When a blood clot enters the cerebral blood vessels and causes cerebral blood vessel blockage, it may cause very serious stroke complications.

[0004] Stroke is the main cause of long-term disability in the elderly and the main consumer of medical resources. Stroke develops and progresses quickly, which can easily cause sequelae, limb damage and paralysis, which brings a heavy burden to patients and their families. It may also cause limb paralysis and make them unable to take care of themselves. Currently, most of the thrombi in patients with non-valvular atrial fibrillation come from the left atrial appendage. The problem of thrombi in the left atrial appendage is a sword hanging over the heads of patients with atrial fibrillation.

[0005] The traditional treatment is oral anticoagulants to inhibit blood clotting and thrombus formation, but long-term oral anticoagulants are expensive, have a high incidence of complications, and poor patient compliance. Medical research has found that closing and blocking the left atrial appendage can significantly reduce the risk of thrombosis and detachment in the left atrial appendage, and the impact on the patient's heart function is within a controllable range. It is an ideal stroke prevention program that can greatly reduce the risk of cardiogenic stroke. Compared with direct thoracotomy for left atrial appendage ligation surgery, the surgical solution of catheter intervention in the left atrial appendage occlusion device has many advantages such as small wounds, low risks, and less pain for patients. It is a new generation of treatment options that has emerged in recent years and is welcomed by the medical market.

[0006] Most of the left atrial appendage occlusion devices currently on the market are made of metal and are equipped with a flow-blocking membrane. They adopt an umbrella-type or cover-type configuration and are highly versatile. However, they are less adaptable to the cauliflower-shaped left atrial appendage and have a poor occlusion effect. The cauliflower-shaped left atrial appendage has a higher incidence of stroke, which is significantly higher than the stroke incidence of left atrial appendages of other shapes. Summary of the invention

[0007] The main purpose of the present invention is to provide a occluding device, aiming to improve the occluding effect of the occluding device, especially the occluding effect on the cauliflower-shaped left atrial appendage.

[0008] To achieve the above object, the present invention provides a blocking device, which comprises:

[0009] A blocking body adapted to match the shape of a target blocking area;

[0010] an elastic connecting member, one end of which is disposed on the blocking body; and

[0011] A hanging component, one end of which is connected to the other end of the elastic connector, and the hanging component is suitable for hanging on the tissue of the target occlusion area.

[0012] Optionally, the blocking body is disc-shaped, and the elastic connecting member is spring-shaped;

[0013] The diameter of the elastic connecting member is smaller than the diameter of the blocking body; and / or

[0014] The elastic connecting piece has a diameter of 14-32 mm and a length of 8-15 mm; and / or

[0015] The diameter of the blocking body is 20-40 mm.

[0016] Optionally, the blocking device further comprises a filling component, which is disposed in the elastic connector and connected to the blocking body, and is used for filling an internal space of the target blocking area and providing radial supporting force for the elastic connector.

[0017] Optionally, the packing member is a structure that is at least partially compressed and can expand spontaneously in a liquid; and / or

[0018] The blocking body is a structure that is at least partially compressed and can expand spontaneously in a liquid.

[0019] Optionally, the blocking body is made of medical degradable material; and / or

[0020] The elastic connecting piece is made of medical degradable material; and / or

[0021] The hanging component is made of medical degradable material; and / or

[0022] The filling component is made of medical degradable material.

[0023] Optionally, the material of the blocking body is expandable polyurethane foam; and / or

[0024] The elastic connector is made of random polylactic acid, polydioxanone, poly(1,2-lactide) copolymer, medical degradable magnesium alloy or zinc alloy, or the elastic connector is a composite structure formed by filling a hollow metal tube with a degradable polymer material; and / or

[0025] The material of the hanging component is L-polylactic acid, polycaprolactone, poly(1-lactide) copolymer, medical degradable magnesium alloy or zinc alloy, or the hanging component is a composite structure formed by filling a degradable polymer material in a hollow metal tube; and / or

[0026] The material of the filling component is expandable polyurethane foam, or the filling component adopts a composite structure in which a hard central rod is wrapped with expandable polyurethane foam.

[0027] Optionally, the elastic connector is provided with a plurality of barbs, and the barbs are used to penetrate into tissue of the target occlusion area.

[0028] Optionally, the height difference between the center and edge of the disk surface of the blocking body is 1-4 mm, and the slope is 5-15°.

[0029] Optionally, there are one or more filling components, and a plurality of the filling components are connected in series.

[0030] Optionally, the elastic connector and the blocking body, and the elastic connector and the hanging component are fixed by crimping or welding; and / or

[0031] The hanging component is provided with a connecting hole suitable for connecting and matching with the end of the pushing device.

[0032] In the technical solution of the present invention, the blocking device includes a blocking body, an elastic connector and a hanging component; the blocking body is adapted to match the shape of the target blocking area; one end of the elastic connector is arranged on the blocking body; one end of the hanging component is connected to the other end of the elastic connector, and the hanging component is adapted to be hung on the tissue of the target blocking area. It can be understood that the blocking device made for the cauliflower-shaped left atrial appendage of the present invention can be implanted into the patient's left atrial appendage through minimally invasive catheter intervention surgery to achieve blocking of the left atrial appendage, and guide the crawling of the left atrial endothelial tissue, greatly improving the blocking effect; and the blocking device is made of degradable materials, which can achieve complete degradation of the device in the human body after endothelialization, and finally completely achieve the blocking effect by the patient's own tissue, effectively preventing the formation and detachment of thrombus emboli in the left atrial appendage, and greatly reducing the risk of stroke. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0034] Figure 1 It is a structural schematic diagram of an embodiment of a blocking device of the present invention;

[0035] Figure 2 It is a front view of an embodiment of the blocking device of the present invention;

[0036] Figure 3 A top view of an embodiment of a blocking device of the present invention;

[0037] Figure 4 A top view of another embodiment of the blocking device of the present invention;

[0038] Figure 5 It is a structural schematic diagram of a plugging component in another embodiment of the plugging device of the present invention;

[0039] Figure 6 This is a schematic diagram of the wire structure of the elastic connector in one embodiment of the plugging device of the present invention;

[0040] Figure 7 Schematic diagram of the wire structure of the elastic connector in another embodiment of the blocking device of the present invention.

[0041] Description of Figure Numbers:

[0042] 10. Sealing body; 20. Elastic connector; 30. Hanging component; 40. Filling component; 311. Braided wire; 312. Coiled wire.

[0043] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 without creative work are within the scope of protection of the present invention.

[0045] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] A medical study showed that the human left atrial appendage can be divided into four forms, namely chicken wing, cactus, windsock and cauliflower, accounting for 48%, 30%, 19% and 3% respectively. Related studies have also shown similar results. Although the cauliflower-shaped left atrial appendage only occupies a small part of the population (3%), it has a very high incidence of stroke, which is significantly higher than the other three types. It is an independent influencing factor for left atrial appendage thrombosis. In addition, the cauliflower-shaped left atrial appendage is also short in length, and there are many problems and risks in the fixation of the current occlusion device.

[0049] In this regard, the present invention proposes a blocking device that can be used to block blood vessels or the heart in the human body or animal body, especially to block the cauliflower-shaped left atrial appendage, but this is not limited here.

[0050] Reference Figures 1 to 3 In one embodiment of the present invention, the blocking device includes a blocking body 10, an elastic connector 20 and a hanging component 30; the blocking body 10 is suitable for adapting to the shape of the target blocking area; one end of the elastic connector 20 is arranged on the blocking body 10; one end of the hanging component 30 is connected to the other end of the elastic connector 20, and the hanging component 30 is suitable for hanging on the tissue of the target blocking area.

[0051] In this embodiment, the occluding body 10 may be disc-shaped to fit the cauliflower-shaped left atrial appendage structure, which is not limited here. The elastic connector 20 may be spring-shaped, etc., so that the hanging component 30 has a wider hanging range, which helps to enhance the hanging reliability. The hanging component 30 may be a hook or a hanging structure with multiple hooks, which is not limited here.

[0052] The head hook of the hanging component 30 can penetrate deep into the left atrial appendage and hook the pectinate muscle inside the left atrial appendage; the disc-shaped blocking body 10 has a certain flow-blocking effect and can be fixed at the opening of the left atrial appendage channel to block the blood flow and prevent blood from flowing into or out of the left atrial appendage; the spring-shaped elastic connector 20 can connect the two parts and has a smaller relaxed annular diameter than the blocking body 10. When stretched by external force, it can be stretched into a long strip, and can restore its original spring shape after the external force is removed.

[0053] In order to achieve a better cauliflower-shaped left atrial appendage occlusion effect, preferably, the diameter of the elastic connector 20 can be smaller than the diameter of the occlusion body 10; specifically, the diameter of the elastic connector 20 can be 14-32 mm, and the length can be 8-15 mm; the diameter of the occlusion body 10 can be 20-40 mm. In this embodiment, the height difference between the center and the edge of the disk of the occlusion body 10 can be set to 1-4 mm, and the slope can be set to 5-15°, which is not limited here.

[0054] It can be understood that the occluding device made for the cauliflower-shaped left atrial appendage of the present invention can be implanted into the patient's left atrial appendage through a minimally invasive catheter interventional surgery to achieve occlusion of the left atrial appendage and guide the crawling of the left atrial endothelial tissue, thereby greatly improving the occluding effect; moreover, the occluding device is made of degradable materials, which can achieve complete degradation of the device in the human body after endothelialization, and ultimately the occluding effect is completely achieved by the patient's own tissue, effectively preventing the formation and detachment of thrombi in the left atrial appendage, and greatly reducing the risk of stroke symptoms.

[0055] In order to further improve the blocking effect of the blocking device, refer to Figures 1 to 5 In some embodiments, the blocking device may further include a filling component 40, which may be in the shape of a rod, etc. The filling component 40 is disposed in the elastic connector 20 and connected to the blocking body 10, and the filling component 40 is used to fill the internal space of the target blocking area and provide radial support for the elastic connector 20. In other words, the filling component 40 has a compressed self-expandable portion that can spontaneously expand to a certain volume in the blood.

[0056] In this embodiment, mainly refer to Figures 3 to 5 The filling component 40 has one or more filling components 40 connected in series in sequence, and can be specifically designed according to factors such as the difficulty of processing and assembly, manufacturing cost, convenience of operation and specific blocking scenarios, which are not limited here.

[0057] When the blocking device contains only a single filling component 40, the expanded diameter of the filling component 40 should be set to be larger than the spring inner ring diameter of the elastic connector 20; when the blocking device contains multiple filling components 40, the expanded diameter of a single filling component 40 can be smaller than the spring inner ring diameter of the elastic connector 20.

[0058] In this embodiment, the filling member 40 is a structure that is at least partially compressed and can expand spontaneously in the liquid. Similarly, the blocking body 10 is a structure that is at least partially compressed and can expand spontaneously in the liquid.

[0059] Furthermore, the blocking body 10 may be made of a medical degradable material; the elastic connector 20 may be made of a soft medical degradable material; the hanging component 30 may be made of a hard medical degradable material; and the filling component 40 may be made of a medical degradable material.

[0060] Among them, the material of the sealing body 10 is expandable polyurethane foam; the material of the elastic connecting member 20 is random polylactic acid, polydioxanone, poly(lactic acid) copolymer, medical degradable magnesium alloy or zinc alloy, or the elastic connecting member 20 is a composite structure formed by filling a hollow metal tube with a degradable polymer material; the material of the hanging component 30 is left-handed polylactic acid, polycaprolactone, poly(lactic acid) copolymer, medical degradable magnesium alloy or zinc alloy, or the hanging component 30 is a composite structure formed by filling a hollow metal tube with a degradable polymer material; the material of the filling component 40 is expandable polyurethane foam, or the filling component 40 is a composite structure of a hard central rod wrapped with expandable polyurethane foam.

[0061] The plugging body 10 is made of expandable polyurethane foam material, which has only a small volume in a compressed state. It can expand within 1-10 minutes after contacting water, and the volume can be expanded to 10-200 times that in the compressed state. In the compressed state, the degradable polyurethane material is folded and compressed into a long column in a certain folding manner, and can be delivered into the human body through a surgical sheath. The center of the long column is the central control to allow the head end of the push device to enter. The expanded polyurethane foam forms a circular disc with a certain diameter and thickness. The center and edge of the disc are not on the same plane and form a conical shape with a small slope.

[0062] The hanging component 30 can be processed into a hook shape through the above-mentioned materials, and has a hardness that can pierce the inner membrane of the heart tissue, and also has a certain elasticity that can withstand a certain degree of extrusion deformation and still recover to more than 90% of the original shape. When the hanging component 30 is a hollow metal tube filled with a degradable polymer material to form a composite structure, the metal shell can provide a relatively strong hardness and elasticity in the early stage, and the internal degradable polymer material can provide long-term mechanical strength, so as to avoid the problem that the degradable metal material degrades too quickly and the mechanical properties cannot be maintained for a long time.

[0063] The size and curvature of the hook component 30 should be designed to have a certain match with the pectinate muscle inside the cauliflower-shaped left atrial appendage, and can provide strong puncture ability and elastic support ability, and can hook the pectinate muscle at the distal end of the left atrial appendage deep inside the left atrial appendage and be fixed in the pectinate muscle channel or recess in the left atrial appendage for a long time (at least three months). The hook has strong elasticity, can be properly straightened and restore the curvature, can be compressed and loaded into the catheter without affecting the delivery of the device, and will recover from the properly straightened state to the initial size and curvature under the action of autogenous elasticity after being sent out of the catheter, so as to achieve the hooking and fixation of the pectinate muscle at the distal end of the left atrial appendage.

[0064] In this embodiment, the elastic connector 20 may be provided with a plurality of barbs, which are used to penetrate into the tissue of the target blocking area. This helps to further improve the reliability of the connection between the blocking device and the human tissue and further enhance the blocking effect. The barbs may be a barb structure processed from a part of the elastic connector 20 itself, or may be an additionally mounted hook.

[0065] The elastic connector 20 can be processed into a thread by the aforementioned material to become a degradable thread. The thread can be processed to produce barbs, which can pierce the endocardium and play a role in partial fixation. Figure 6 and Figure 7 As shown, the elastic connector 20 can be made of braided wire 311 or coiled wire 312. The spring-shaped component can be prepared by directly winding and shaping silk thread, or multiple strands of silk thread can be braided into a braided wire and then wound, or the silk thread can be first spirally wound into a slender steel cable and then wound. The length and diameter of the spring formed by winding and shaping are compatible with the clinical typical size of the left atrial appendage. Preferably, the diameter range of the spring after winding and shaping can be 14-32mm, and the length range can be 8-15mm.

[0066] During processing, a thicker degradable wire can be directly wound into a large spring, or a thinner degradable wire can be first wound into a slender spring, and then wound into a large spring for a second time, or multiple strands can be woven into a braided wire and then wound into a large spring for a second time. Preferably, the diameter of the degradable wire or the thin spring made of the degradable wire should be smaller than the inner diameter of the catheter used in the catheter interventional surgery. The degradable wire can be a multi-layer composite structure, and can also have certain designed patterns, grooves, etc. to facilitate its elastic bending. Among them, when processing barbs, roller rolling can be used to form barbs, and laser cutting means can also be used. Laser parameters such as power, pulse frequency, cutting speed, etc. are set according to the characteristics of the angle, size, spacing, etc. of the barbs to ensure the formation of an effective barb structure.

[0067] The filling component 40 is made of a medical degradable material and has an expandable property. It is compressed into a vertical strip in vitro, and after contacting and absorbing blood, it can spontaneously expand radially within a certain period of time. It can be made of a separate expandable polyurethane foam material, or it can be a thin hard central thin rod wrapped with an expandable polyurethane foam material. The composite structure is conducive to improving the connection strength of the structure. The filling connecting rod can be used individually or in series. It expands to a set size in vivo, has the function of filling the internal space of the left atrial appendage and providing radial support for the spring coil.

[0068] In addition, the size of the occluding body 10 and the length and diameter of the elastic connecting member 20 are designed with different optional models to cope with different opening sizes and depths of the cauliflower-shaped left atrial appendage.

[0069] It should be noted that the left atrial appendage occlusion devices currently on the market are mostly made of metal and are equipped with a flow-blocking membrane. They adopt an umbrella-type or cover-type configuration and are highly versatile. However, there are still many problems such as metal ion leakage, metal fatigue, and metal implants affecting CT and MRI detection.

[0070] The implantable occlusion device made of the degradable material provided by the present invention can provide flow blocking and support in the early stage of implantation, provide a bridge for endothelial tissue to crawl over, and gradually degrade after completing the occlusion mission and be replaced by autologous tissue, thus achieving the goal of completely completing the occlusion with autologous tissue, which is in line with the health concept of "no implantation during intervention and no residue after implantation".

[0071] In order to ensure the reliability of the connection between the components and the sealing stability of the sealing device, refer to Figure 1 and Figure 2 In one embodiment, the elastic connector 20 and the blocking body 10, and the elastic connector 20 and the hanging component 30 are fixed by upper and lower pressing sheets or hot-melt pressing sheets. More specifically, when the hanging component 30 is metal or the outer layer is metal, it can be combined by pressing sheets; when the hanging component 30 is made of all polymer materials, it can be fixed by pressing sheets and welding sheets to obtain a better fixing effect.

[0072] In this embodiment, the hanging component 30 is provided with a connecting hole suitable for connecting and matching with the end of the pushing device. The connecting hole can be a threaded hole, etc., which is not limited here.

[0073] During the operation, the blocking body 10 and the plugging component 40 are in a compressed state, the pushing device is connected to the blocking device, and only the blocking body 10 is pulled into the loader for rapid exhaust treatment to exhaust the gas in the device delivery system to avoid gas embolism (gas embolism is a clinical complication that can cause death of the patient in severe cases); the elastic connector 20 is stretched, the hanging component 30 is inserted into the sheath tube and pushed, the hanging component 30 is released at the far end to try to hook the distal pectinate muscle, and then the elastic connector 20 is gradually pushed so that it naturally recovers to a spring shape in the left atrial appendage, because it has good elasticity and can have a certain adaptability to the shape of the left atrial appendage. After that, the stability of its mounting can be confirmed by a pulling experiment. After confirming stability, the loader is connected to the outer sheath, and the pushing and conveying device is pushed forward to release the plugging components 40 one by one, waiting for the plugging components 40 to expand and fill the space in the atrial appendage, and then the umbrella part of the blocking body 10 is pushed out, and after the polyurethane expands into a roughly conical disc, the residual shunt is confirmed by instrument assistance. After there is no residual shunt, the pusher can be separated from the instrument by twisting it to complete the release.

[0074] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A blocking device, characterized in that: The blocking device comprises: A blocking body adapted to match the shape of a target blocking area; an elastic connecting member, one end of which is disposed on the blocking body; and A hanging component, one end of which is connected to the other end of the elastic connector, and the hanging component is suitable for hanging on the tissue of the target occlusion area.

2. The blocking device according to claim 1, characterized in that: The blocking body is in the shape of a disk, and the elastic connecting piece is in the shape of a spring; The diameter of the elastic connecting member is smaller than the diameter of the blocking body; and / or The elastic connecting piece has a diameter of 14-32 mm and a length of 8-15 mm; and / or The diameter of the blocking body is 20-40 mm.

3. The blocking device according to claim 2, characterized in that: The blocking device further comprises a filling component, which is disposed in the elastic connector and connected to the blocking body, and is used to fill the internal space of the target blocking area and provide radial support force for the elastic connector.

4. The blocking device according to claim 3, characterized in that: The packing member is a structure that is at least partially compressed and can expand spontaneously in the liquid; and / or The blocking body is a structure that is at least partially compressed and can expand spontaneously in a liquid.

5. The blocking device according to claim 3, characterized in that: The blocking body is made of medical degradable material; and / or The elastic connecting piece is made of medical degradable material; and / or The hanging component is made of medical degradable material; and / or The filling component is made of medical degradable material.

6. The blocking device according to claim 5, characterized in that: The material of the blocking body is expandable polyurethane foam; and / or The elastic connector is made of random polylactic acid, polydioxanone, poly(1,2-lactide) copolymer, medical degradable magnesium alloy or zinc alloy, or the elastic connector is a composite structure formed by filling a hollow metal tube with a degradable polymer material; and / or The material of the hanging component is L-polylactic acid, polycaprolactone, poly(1-lactide) copolymer, medical degradable magnesium alloy or zinc alloy, or the hanging component is a composite structure formed by filling a degradable polymer material in a hollow metal tube; and / or The material of the filling component is expandable polyurethane foam, or the filling component adopts a composite structure in which a hard central rod is wrapped with expandable polyurethane foam.

7. The blocking device according to claim 1, characterized in that: The elastic connecting piece is provided with a plurality of barbs, and the barbs are used to pierce into the tissue of the target occlusion area.

8. The blocking device according to claim 2, characterized in that: The height difference between the center and the edge of the disk surface of the blocking body is 1-4 mm, and the slope is 5-15°.

9. The blocking device according to claim 3, characterized in that: There are one or more filling components, and a plurality of the filling components are connected in series.

10. The blocking device according to claim 1, characterized in that: The elastic connector and the blocking body, and the elastic connector and the hanging component are fixed by crimping or welding; and / or The hanging component is provided with a connecting hole suitable for connecting and matching with the end of the pushing device.

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