A braided spring coil and a delivery system

Abstract

The present invention relates to the technical field of aneurysm coils, and particularly relates to a braided coil, comprising: an embolization body which is braided into a net tubular shape by a plurality of braided wires; two ends of the embolization body are respectively a first end portion and a second end portion; a first protection portion which covers the first end portion; the diameter of the first protection portion is the same as the diameter of the embolization body, or one end diameter of the first protection portion is larger than the other end diameter thereof, and the diameter of the smaller end of the first protection portion is the same as the diameter of the embolization body; and / or a second protection portion which covers the second end portion; the diameter of the second protection portion is the same as the diameter of the embolization body, or one end diameter of the second protection portion is larger than the other end diameter thereof, and the diameter of the larger end of the second protection portion is the same as the diameter of the embolization body. The present invention also particularly relates to a delivery system.

Description

Technical Field

[0001] The present invention relates to the technical field of aneurysm coils, and particularly to a braided coil and a delivery system. Background Art

[0002] Endovascular interventional therapy is currently one of the main treatment methods for aneurysms. Endovascular interventional therapy mainly uses coil technology and related stent-assisted embolization techniques. In the initial stage, only bare metal coil products were usually used. Usually, implanting multiple coil products in the aneurysm cavity still fails to achieve the purpose of complete embolization.

[0003] With the iterative replacement of products, various coil products have also been developed in coil technology. For example, the invention patent with the publication number CN102302377A discloses a net-shaped embolization coil and its preparation method. The net-shaped embolization coil is woven into a net-shaped spiral coil or a net-shaped space net by nickel-titanium alloy wire and platinum wire. The net-shaped coil is woven into a net shape by nickel-titanium alloy wire and platinum wire. The nickel-titanium alloy wire has good shape memory function. After placing the net-shaped embolization coil made of nickel-titanium alloy wire into the aneurysm, the coil will be more stable and easier to fill the aneurysm space. The net-shaped embolization coil is a multi-mesh structure, and the dense meshes are more likely to cause embolization, shorten the aneurysm embolization time, prevent the aneurysm from rupturing, and effectively prevent vascular embolization. However, this net-shaped embolization coil also has the following disadvantages:

[0004] 1. When the net-shaped embolization coil bends and deforms in the aneurysm, it may be flattened due to extrusion, and a sharp bending angle as shown in Figure 1 will be formed at the flattened part. This sharp bending angle may penetrate the aneurysm wall and cause the risk of bleeding.

[0005] 2. The distal spring is connected to the distal end of the net-shaped coil, and the transition of the overall hardness of the net-shaped embolization coil at the connection between the two is too abrupt. The connection between the two may also cause the aneurysm to rupture and bleed.

[0006] 3. After the proximal end of the net-shaped coil is detached, the relatively hard proximal end may penetrate the aneurysm wall and cause the risk of bleeding. Summary of the Invention

[0007] To solve or at least partially solve the above technical problems, the present invention provides a braided coil and a delivery system.

[0008] The present invention provides a braided coil, which includes:

[0009] An embolization body, which is woven into a net shape by multiple braided wires; the two ends of the embolization body are respectively a first end and a second end;

[0010] The first protection part covers the first end part; the diameter of the first protection part is the same as the diameter of the embolism body, or the diameter of one end of the first protection part is greater than that of the other end, and the diameter of the end with the smaller diameter of the first protection part is the same as the diameter of the embolism body; and / or,

[0011] The second protection part covers the second end part; the diameter of the second protection part is the same as the diameter of the embolism body, or the diameter of one end of the second protection part is greater than that of the other end, and the diameter of the end with the larger diameter of the second protection part is the same as the diameter of the embolism body.

[0012] Furthermore, the wire diameter of the braided wire is 0.01 - 0.03 mm; the diameter of the embolism body is 0.5 - 1.5 mm.

[0013] Furthermore, one end of the first protection part close to the distal end is a closed structure; the braiding density of the first protection part is greater than that of the first end part; and / or,

[0014] One end of the second protection part close to the proximal end is a closed structure; the braiding density of the second protection part is greater than that of the second end part.

[0015] Furthermore, the braided spring coil further includes a distal soft spring and a radiopaque tip. The distal soft spring is arranged at the first end part; the radiopaque tip is spherical or hemispherical; the radiopaque tip is arranged at the second end part.

[0016] Furthermore, when the braided spring coil is in a compressed state, the length of the second end part is greater than or equal to or less than the length of the second protection part; when the braided spring coil is in a non-compressed state, the length of the second end part is less than the length of the second protection part.

[0017] Furthermore, the first end part is spiral and one end is connected to the embolism body; or the first end part is a variable-diameter spiral and the end with the larger diameter is connected to the embolism body; and / or,

[0018] The second end part is spiral and one end is connected to the embolism body; or the second end part is a variable-diameter spiral and the end with the larger diameter is connected to the embolism body.

[0019] Furthermore, the coverage rate of the first end part is 5 - 30%, the coverage rate of the first protection part is 5 - 40%, and when the first protection part covers the first end part, the coverage rate of the structure formed by the two is 10 - 60%; and / or,

[0020] The coverage rate of the second end part is 5 - 30%, the coverage rate of the second protection part is 5 - 40%, and when the second protection part covers the second end part, the coverage rate of the structure formed by the two is 10 - 60%.

[0021] Further, the embolism body includes a plurality of embolism segments, and two adjacent embolism segments are connected by a connecting spring.

[0022] Further, the embolism body includes a plurality of embolism segments, and two adjacent embolism segments are connected by a plurality of connecting wires; the plurality of connecting wires are uniformly arranged around the axis of the embolism body; the connecting wires are straight wires or wavy wires.

[0023] Further, the braided spring coil further includes a plurality of fiber hairs, and the plurality of fiber hairs are respectively arranged on the plurality of connecting wires; the plurality of fiber hairs are spirally arranged around the axis of the embolism body.

[0024] The present invention provides another braided spring coil, which includes an embolism body, a distal soft spring, and a radiopaque tip. The embolism body is braided into a net tube shape by a plurality of braided wires; the wire diameter of the braided wire is 0.01 - 0.03 mm; the diameter of the embolism body is 0.5 - 1.5 mm; a plurality of groups of stop slits are provided on the embolism body, and the plurality of groups of stop slits are sequentially arranged at intervals along the length direction of the embolism body; the two ends of the embolism body are respectively a first end and a second end; the distal soft spring is arranged at the first end; the radiopaque tip is spherical or hemispherical; the radiopaque tip is arranged at the second end.

[0025] Further, each group of stop slits includes at least two stop slits, and the at least two stop slits are respectively arranged on both sides of the embolism body along its length direction.

[0026] Further, the distance between two adjacent stop slits on the same side of the embolism body is 2 - 44 mm.

[0027] Further, the embolism body is provided with a first protection part covering the first end; the end of the first protection part close to the distal end is a closed structure; the braiding density of the first protection part is greater than that of the first end;

[0028] The diameter of the first protection part is the same as the diameter of the embolism body, or the diameter of one end of the first protection part is greater than that of the other end, and the diameter of the smaller end of the first protection part is the same as the diameter of the embolism body.

[0029] Further, the embolism body is provided with a second protection part covering the second end; the end of the second protection part close to the proximal end is a closed structure; the braiding density of the second protection part is greater than that of the second end;

[0030] The diameter of the second protection part is the same as the diameter of the embolism body, or the diameter of one end of the second protection part is greater than that of the other end, and the diameter of the larger end of the second protection part is the same as the diameter of the embolism body.

[0031] Further, when the braided spring coil is in a compressed state, the length of the second end portion is greater than, equal to, or less than the length of the second protection portion; when the braided spring coil is in a non-compressed state, the length of the second end portion is less than the length of the second protection portion.

[0032] Further, the first end portion is spiral and one end thereof is connected to the embolization body; or the first end portion is a stepped spiral and the end with a larger diameter is connected to the embolization body; and / or,

[0033] The second end portion is spiral and one end thereof is connected to the embolization body; or the second end portion is a stepped spiral and the end with a larger diameter is connected to the embolization body.

[0034] Further, the first end portion is spiral or stepped spiral; and / or, the second end portion is spiral or stepped spiral.

[0035] Further, the embolization body includes a plurality of embolization segments, and two adjacent embolization segments are connected by a connecting spring.

[0036] Further, the embolization body includes a plurality of embolization segments, and two adjacent embolization segments are connected by a plurality of connecting wires; the plurality of connecting wires are uniformly arranged around the axis of the embolization body; the connecting wires are straight wires or wavy wires.

[0037] Further, the braided spring coil further includes a plurality of fiber hairs, and the plurality of fiber hairs are arranged on the connecting wires;

[0038] The plurality of fiber hairs are uniformly arranged around the axis of the embolization body; or, the plurality of fiber hairs are arranged in a spiral shape around the axis of the embolization body.

[0039] Further, the braided wire forming the embolization body is a nickel-titanium-platinum wire; or,

[0040] The braided wire forming the embolization body is a nickel-titanium wire and a platinum-iridium wire; or,

[0041] The braided wire forming the embolization body is made of a polymer material.

[0042] The present invention further provides a delivery system, which includes: the braided spring coil according to any one of the above, and the braided spring coil is released in the aneurysm cavity by electrolytic detachment or mechanical detachment.

[0043] Compared with the prior art, the braided spring coil disclosed in this embodiment is provided with a first protection portion on the embolization body, and the first protection portion is used to cover and protect the first end portion and the connection portion between the first end portion and the distal spring, so that the transition of the braided spring coil is smooth, and the risk of bleeding caused by the first end portion damaging the aneurysm wall is reduced. Description of the Drawings

[0044] To more clearly illustrate the embodiments of the present invention, the following will briefly introduce the relevant drawings. It can be understood that the drawings in the following description are only used to illustrate some embodiments of the present invention, and those of ordinary skill in the art can also obtain many other technical features and connection relationships not mentioned herein based on these drawings.

[0045] Figure 1 is a background art drawing;

[0046] Figure 2 is a schematic diagram of an embodiment of a conveying system of the present invention Figure 1 ;

[0047] Figure 3 is a schematic diagram of an embodiment of a braided spring coil in a compressed state of the present invention Figure 1 ;

[0048] Figure 4 is a schematic diagram of an embodiment of a braided spring coil in a compressed state of the present invention Figure 2 ;

[0049] Figure 5 is a schematic diagram of an embodiment of a conveying system of the present invention Figure 2 ;

[0050] Figure 6 is a schematic diagram of an embodiment of a braided spring coil in a compressed state of the present invention Figure 3 ;

[0051] Figure 7 is a schematic diagram of an embodiment of a braided spring coil in a compressed state of the present invention Figure 4 ;

[0052] Figure 8 is a schematic diagram of an embodiment of a braided spring coil in a compressed state of the present invention Figure 5 ;

[0053] Figure 9 is a schematic diagram of an embodiment of a braided spring coil in a compressed state of the present invention Figure 6 ;

[0054] Figure 10 is a schematic diagram of an embodiment of a braided spring coil in a compressed state of the present invention Figure 7 ;

[0055] Figure 11 is a schematic diagram of an embodiment of a braided spring coil in a compressed state of the present invention Figure 8 ;

[0056] Figure 12Schematic diagram of an embodiment of a braided spring coil of the present invention in a compressed state Figure 9 ;

[0057] Figure 13 Schematic diagram of an embodiment of a braided spring coil of the present invention in a compressed state Figure 10 ;

[0058] Figure 14 Schematic diagram of an embodiment of the connection between the fiber hairs and the connecting wires of a braided spring coil of the present invention Figure 1 ;

[0059] Figure 15 Schematic diagram of an embodiment of the connection between the fiber hairs and the connecting wires of a braided spring coil of the present invention Figure 2 。

[0060] Description of reference numerals:

[0061] 1. Embolization body; 10. Braided wire; 11. First end; 12. Second end; 13. First protection part; 14. Main body part; 15. Second protection part; 16. Stop crack; 17. Embolization segment; 2. Distal soft spring; 3. Radiopaque tip; 41. Connecting spring; 42. Connecting wire; 43. Fiber hair. Detailed implementation manners

[0062] In order to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration purposes only and are not intended to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, multiple details are provided to fully understand the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner to simplify the drawings.

[0063] The terms "first", "second", etc. in the description and claims of the embodiments of the present disclosure and the above accompanying drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0064] In the embodiments of the present disclosure, the orientation or positional relationships indicated by terms such as "upper", "lower", "inner", "middle", "outer", "front", and "rear" are based on the orientation or positional relationships shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their examples, and are not used to limit that the indicated devices, elements, or components must have a specific orientation, or be constructed and operated in a specific orientation. Moreover, in addition to being able to represent orientation or positional relationships, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0065] In addition, the terms "arrangement", "connection", and "fixation" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0066] Unless otherwise specified, the term "plurality" means two or more, and "multiple groups" means two or more groups.

[0067] It should be noted that, without conflict, the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0068] In the present invention, the distal end refers to the end far from the surgeon during the operation, and the proximal end refers to the end close to the surgeon during the operation.

[0069] The inventors found that when the mesh tubular embolization spring is bent and deformed in the aneurysm, the end of the mesh tubular embolization spring close to the distal end is relatively hard, which may also cause damage to the aneurysm wall and lead to the risk of bleeding.

[0070] When the inventors were solving the above technical problems, they also conducted a search on the prior art, and the search results included:

[0071] The prior art 1 is a mesh tubular embolization spring and its preparation method with the publication number of CN102302377A for a patent application for invention;

[0072] The prior art 2 is a coil with the announcement number of CN203885554U for a utility model patent;

[0073] The prior art 3 is a mesh coil and its preparation method with the publication number of CN104758025A for a patent application for invention.

[0074] The technical problems discovered by the inventor are not solved in the technical solutions disclosed in the three pieces of prior art. In view of this, the inventor of the present invention provides a braided spring coil to solve the above problems. The following will describe in detail several specific embodiments of the present invention with reference to the accompanying drawings.

[0075] First Embodiment

[0076] A braided spring coil mentioned in this embodiment, as Figure 2 shown, the braided spring coil includes an embolization body 1, a distal soft spring 2, and a radiopaque tip 3. The embolization body 1 is woven into a network tubular structure by a plurality of braided wires 10. Optionally, the embolization body 1 is woven into a network tubular structure by 4 to 48 braided wires 10. The wire diameter of the braided wire 10 used for the embolization body 1 is 0.01 mm to 0.03 mm, and the diameter of the embolization body 1 is 0.5 mm to 1.5 mm. One end of the embolization body 1 is the first end 11, and the other end of the embolization body 1 is the second end 12. A first protection part 13 is arranged on the embolization body 1, and the first protection part 13 covers the first end 11 of the embolization body 1.

[0077] Specifically, after a plurality of braided wires 10 are woven to form the main body part 14 of the embolization body 1, one end of the embolization body 1 is woven to form the second end 12. The diameter of one end of the second end 12 is larger than that of the other end. The end with the larger diameter of the second end 12 is connected to the main body part 14 of the embolization body 1, and the end with the smaller diameter of the second end 12 is connected to the radiopaque tip 3, that is, the second end 12 is in a narrow-mouth structure. The radiopaque tip 3 is spherical or hemispherical.

[0078] Similarly, the plurality of braided wires 10 are divided into two parts. One part of the braided wires 10 is woven at the other end of the embolization body 1 to form the first end 11, and the first end 11 is in a narrow-mouth structure. One end of the distal soft spring 2 is connected to the end with the smaller diameter of the first end 11. The other part of the braided wires 10 is also woven at the other end of the embolization body 1 to form the first protection part 13. The first end 11 is located inside the first protection part 13, that is, it can be regarded that the first protection part 13 covers the first end 11. When weaving the first protection part 13, the end of the first protection part 13 close to the distal end is closed, and a closed structure as Figure 2 shown is formed.

[0079] Compared with the prior art, the braided spring coil disclosed in this embodiment is provided with the first protection part 13 on the embolization body 1, and the first protection part 13 is used to cover and protect the first end 11 and the connection part between the first end 11 and the distal spring, so that the transition of the braided spring coil is smooth, and the risk of the first end 11 damaging the aneurysm wall and causing bleeding is reduced.

[0080] Optionally, the coverage rate of the main body portion 14 of the embolization body 1 woven by multiple braided wires 10 is 10% - 40%. The coverage rate of the second end portion 12 is 5% - 30%. The coverage rate of the first end portion 11 is 5% - 30%, and the coverage rate of the first protection portion 13 is 5% - 40%. When the first protection portion 13 covers the first end portion 11, the coverage rate of the structure formed by the first protection portion 13 and the first end portion 11 is 10% - 60%. Such a setting can increase the embolization rate of the braided coil in the aneurysm.

[0081] In this embodiment, the specific setting method of the first protection portion 13 is as follows:

[0082] Optionally, as Figure 2 shown, the diameter of the first protection portion 13 is the same as the diameter of the embolization body 1. Such a setting facilitates the connection between the first protection portion 13 and the embolization body 1, and also facilitates covering and protecting the first end portion 11 and the connection between the first end portion 11 and the distal spring.

[0083] Optionally, as Figure 3 shown, the diameter of the end of the first protection portion 13 close to the distal end is larger than the diameter of the end of the first protection portion 13 close to the embolization body 1, and the diameter of the end of the first protection portion 13 with a smaller diameter is the same as the diameter of the embolization body 1. Such a setting not only facilitates the connection between the first protection portion 13 and the embolization body 1, but also facilitates covering and protecting the first end portion 11 and the connection between the first end portion 11 and the distal spring with the end of the first protection portion 13 with a larger diameter, avoiding damage to the aneurysm wall by the first end portion 11.

[0084] Optionally, the braiding density of the first protection portion 13 is greater than the braiding density of the first end portion 11. Such a setting can further strengthen the protection of the first protection portion 13 for the first end portion 11.

[0085] Any one of the above three optional technical solutions can be selected.

[0086] Of course, the optional technical solution that the braiding density of the first protection portion 13 is greater than the braiding density of the first end portion 11 can also be combined with the above two technical solutions regarding the diameter of the first protection portion 13 respectively.

[0087] Second Embodiment

[0088] The inventor found that when the network tubular embolization spring bends and deforms in the aneurysm, the texture of the end of the network tubular embolization spring close to the proximal end is relatively hard, which may also cause damage to the aneurysm wall and lead to the risk of bleeding.

[0089] A braided coil mentioned in this embodiment, as Figure 2As shown in the figure, the braided coil includes an embolization body 1, a distal soft spring 2, and a radiopaque tip 3. The embolization body 1 is braided into a network tubular structure by a plurality of braided wires 10. Optionally, the embolization body 1 is braided into a network tubular structure by 4 to 48 braided wires 10. The wire diameter of the braided wire 10 used for the embolization body 1 is 0.01 mm to 0.03 mm, and the diameter of the embolization body 1 is 0.5 mm to 1.5 mm. One end of the embolization body 1 is the first end 11, and the other end of the embolization body 1 is the second end 12. A second protection part 15 is arranged on the embolization body 1, and the second protection part 15 covers the second end 12 of the embolization body 1.

[0090] Specifically, after the main body part 14 of the embolization body 1 is braided by a plurality of braided wires 10, one end of the embolization body 1 is braided to form the first end 11. The diameter of one end of the first end 11 is larger than that of the other end, that is, the first end 11 is a narrow-mouth structure. The end with the larger diameter of the first end 11 is connected to the main body part 14 of the embolization body 1, and the end with the smaller diameter of the first end 11 is connected to one end of the distal soft spring 2.

[0091] Similarly, the plurality of braided wires 10 are divided into two parts. One part of the braided wires 10 braids the other end of the embolization body 1 to form the second end 12, and the second end 12 is a narrow-mouth structure. The radiopaque tip 3 is connected to the end with the smaller diameter of the second end 12. The other part of the braided wires 10 also braids the other end of the embolization body 1 to form the second protection part 15. The second end 12 is located inside the second protection part 15, that is, it can be regarded that the second protection part 15 covers the second end 12. When braiding the second protection part 15, the end of the second protection part 15 close to the proximal end is closed, and a closed structure as shown in Figure 2 the figure is formed.

[0092] Compared with the prior art, the braided coil disclosed in this embodiment reduces the damage to the aneurysm by arranging the second protection part 15 on the embolization body 1 and using the radiopaque tip 3 to restrict the braided wires 10. The radiopaque tip 3 in the shape of a sphere or a hemisphere reduces the damage to the aneurysm. At the same time, the second protection part 15 is used to cover and protect the second end 12, further reducing the risk of bleeding caused by the second end 12 damaging the aneurysm wall.

[0093] Optionally, the coverage rate of the main body part 14 of the embolization body 1 braided by a plurality of braided wires 10 is 10% to 40%. The coverage rate of the first end 11 is 5% to 30%. The coverage rate of the second end 12 is 5% to 30%, and the coverage rate of the second protection part 15 is 5% to 40%. When the second protection part 15 covers the second end 12, the coverage rate of the structure formed by the second protection part 15 and the second end 12 is 10% to 60%. Such a setting can increase the embolization rate of the braided coil in the aneurysm.

[0094] In this embodiment, the setting method of the second protection part 15 is specifically as follows:

[0095] Optionally, as Figure 2 shown, the diameter of the second protection part 15 is the same as the diameter of the embolism body 1. Such a setting facilitates the connection between the second protection part 15 and the embolism body 1, and also facilitates the protection of the first end 11.

[0096] Optionally, as Figure 3 shown, the diameter of one end of the second protection part 15 close to the embolism body 1 is greater than the diameter of one end of the second protection part 15 close to the proximal end, and the diameter of the end with the larger diameter of the second protection part 15 is the same as the diameter of the embolism body 1. Such a setting not only facilitates the connection between the second protection part 15 and the embolism body 1, but also facilitates the use of the end with the smaller diameter of the second protection part 15 to protect the second end 12 and avoid damage to the aneurysm wall by the second end 12.

[0097] Optionally, the braiding density of the second protection part 15 is greater than the braiding density of the second end 12. Such a setting can further strengthen the protection of the second protection part 15 on the second end 12.

[0098] Any one of the above three optional technical solutions can be selected.

[0099] Of course, the optional technical solution that the braiding density of the second protection part 15 is greater than the braiding density of the second end 12 can also be combined with the above two technical solutions regarding the diameter of the second protection part 15 respectively.

[0100] Third Embodiment

[0101] The inventor found that when the mesh tubular embolization spring bends and deforms in the aneurysm, it may be flattened due to extrusion, and a sharp bending angle as Figure 1 shown is formed at the flattened part. This sharp bending angle may penetrate the aneurysm wall and cause the risk of bleeding.

[0102] A braided spring coil mentioned in this embodiment, as shown in the figure, the braided spring coil includes an embolism body 1, a distal soft spring 2, and a radiopaque end 3. The embolism body 1 is woven into a mesh tubular structure by a plurality of braided wires 10. Optionally, the embolism body 1 is woven into a mesh tubular structure by 4 to 48 braided wires 10. The wire diameter of the braided wire 10 used for the embolism body 1 is 0.01 mm to 0.03 mm, and the diameter of the embolism body 1 is 0.5 mm to 1.5 mm. One end of the embolism body 1 is the first end 11, and the other end of the embolism body 1 is the second end 12. One end of the distal soft spring 2 is connected to the first end 11 of the embolism body 1. The radiopaque end 3 is arranged at the second end 12 of the embolism body 1, and the radiopaque end 3 is spherical or hemispherical.

[0103] In this embodiment, there are multiple groups of stop gaps 16 on the embolization body 1. The specific setting method of the stop gaps 16 is as follows:

[0104] Optionally, not shown in the figure, multiple groups of stop gaps 16 are arranged at intervals along the length direction of the embolization body 1. Each group of stop gaps 16 includes two stop gaps 16, and the two stop gaps 16 are respectively located on both sides of the embolization body 1 along its length direction and are symmetrically arranged. On the same side of the embolization body 1 along its length direction, the distance between two adjacent stop gaps 16 is 2 mm to 44 mm.

[0105] Optionally, as Figure 4 shown, multiple groups of stop gaps 16 are arranged at intervals along the length direction of the embolization body 1. Each group of stop gaps 16 includes two stop gaps 16, and the two stop gaps 16 are respectively located on both sides of the embolization body 1 along its length direction and are staggeredly arranged. In the same group of stop gaps 16, the distance between the two stop gaps 16 located on both sides of the embolization body 1 is 1 mm to 3 mm. On the same side of the embolization body 1 along its length direction, the distance between two adjacent stop gaps 16 is 2 mm to 44 mm.

[0106] Optionally, as Figure 5 shown, multiple groups of stop gaps 16 are arranged at intervals along the length direction of the embolization body 1. Each group of stop gaps 16 may also include three or more stop gaps 16. When each group of stop gaps 16 includes three stop gaps 16, one of the stop gaps 16 is located on one side of the embolization body 1, and the other two stop gaps 16 are located on the other side of the embolization body 1.

[0107] Any one of the above three alternative technical solutions can be selected.

[0108] Compared with the prior art, the braided coil disclosed in this embodiment avoids the risk of sharp bending angles generated when the embolization body 1 is flattened by setting stop gaps 16 on the embolization body 1. When the embolization body 1 undergoes bending deformation in the aneurysm cavity, after the embolization body 1 is flattened, the embolization body 1 avoids the generation of sharp bending angles on the embolization body 1 through the coordinated cooperation of four technical features: the wire diameter of the braided wire 10, the diameter of the embolization body 1, the setting method of the stop gaps 16, and the distance between adjacent stop gaps 16. That is, stop gaps 16 are preset in advance at the places on the embolization body 1 where sharp bending angles will be generated when flattened, avoiding the generation of sharp bending angles and reducing the risk of the braided coil penetrating the aneurysm wall and causing bleeding.

[0109] Optionally, the coverage rate of the embolization body 1 braided by multiple braided wires 10 is 10% to 40%. This can make the embolization body 1 have sufficient softness when the stop gaps 16 are provided, avoiding damage to the aneurysm.

[0110] Fourth embodiment

[0111] The braided spring coil mentioned in this embodiment has a technical solution as follows:

[0112] Optionally, the first embodiment is combined with the second embodiment.

[0113] Optionally, the first embodiment is combined with the third embodiment.

[0114] Optionally, the second embodiment is combined with the third embodiment.

[0115] Optionally, the first embodiment, the second embodiment and the third embodiment are combined.

[0116] You can choose any one of the above four optional technical solutions.

[0117] In this embodiment, the selection of the material of the braided wire 10 is as follows:

[0118] Optionally, the braided wire 10 may be made of nickel-titanium-platinum wire, and a plurality of nickel-titanium-platinum wires may be braided into the embolization body 1 of a mesh tube structure.

[0119] Optionally, the braided wire 10 may be made of nickel-titanium wire and platinum-iridium wire, and a plurality of nickel-titanium wires and a plurality of platinum-iridium wires may be mixed and braided into the embolization body 1 having a mesh tube-like structure.

[0120] Optionally, the braided wires 10 can be braided with braided wires 10 made of polymer materials, such as braided wires 10 made of multiple polylactic acid materials or polyester fibers or polyethylene or polyurethane to weave into the embolic body 1 with a mesh tube structure.

[0121] Of course, one, two or three of the above three optional technical solutions can be selected, and then the braided wires 10 made of different materials are mixed and braided into the embolic body 1 with a mesh tube structure.

[0122] Optionally, the developing end 3 can be made of developing material. In the present invention, the developing material can be any one of platinum-iridium alloy, platinum-tungsten alloy and tantalum alloy. This makes it easier for the operator to observe the position of the braided spring coil under the imaging condition.

[0123] Fifth embodiment

[0124] The inventors have found that in the second embodiment or the fourth embodiment, the second end portion 12 of the braided spring coil is relatively hard and may also cause a risk of damaging the aneurysm wall and causing bleeding.

[0125] In view of this, this embodiment also proposes a braided spring coil. The fifth embodiment is a further improvement based on the second or fourth embodiment, and the main improvement lies in the length of the second end portion 12. The specific solution is as follows:

[0126] Optionally, as Figure 3 shown, when the braided spring coil is in a compressed state, the length of the second end portion 12 is greater than the length of the second protection portion 15. When the braided spring coil is released in the aneurysm, the braided spring coil deforms and winds, that is, when the braided spring coil can be regarded as being in a non-compressed state, the second end portion 12 retracts, and the length of the second end portion 12 becomes less than the length of the second protection portion 15. Such a setting can prevent the end of the second end portion 12 close to the proximal end from exceeding the second protection portion 15, and improves the protection strength of the second protection portion 15 for the second end portion 12.

[0127] Optionally, as Figure 6 shown, when the braided spring coil is in a compressed state, the length of the second end portion 12 is equal to the length of the second protection portion 15. When the braided spring coil is released in the aneurysm, the braided spring coil deforms and winds, that is, when the braided spring coil can be regarded as being in a non-compressed state, the second end portion 12 retracts, and the length of the second end portion 12 becomes less than the length of the second protection portion 15. Such a setting can prevent the end of the second end portion 12 close to the proximal end from exceeding the second protection portion 15, and improves the protection strength of the second protection portion 15 for the second end portion 12.

[0128] Optionally, as Figure 7 shown, when the braided spring coil is in a compressed state, the length of the second end portion 12 is less than the length of the second protection portion 15. When the braided spring coil is released in the aneurysm, the braided spring coil deforms and winds, that is, when the braided spring coil can be regarded as being in a non-compressed state, the second end portion 12 can further retract, and the length of the second end portion 12 becomes less than the length of the second protection portion 15. Such a setting improves the protection strength of the second protection portion 15 for the second end portion.

[0129] Any one of the above three alternative technical solutions can be selected.

[0130] Of course, the first or fourth embodiment can also be further improved with reference to the above three alternative technical solutions. The main improvement lies in the length of the first end portion, as follows:

[0131] Optionally, as Figure 3As shown, when the braided coil is in a compressed state, the length of the first end portion 11 is greater than the length of the first protection portion 13. When the braided coil is detached in the aneurysm, the braided coil is deformed and wound, that is, when the braided coil can be regarded as being in a non-compressed state, the first end portion 11 retracts, and the length of the first end portion 11 becomes less than the length of the first protection portion 13. Such a setting can prevent the end of the first end portion 11 close to the distal end from exceeding the first protection portion 13, and improves the protection strength of the first protection portion 13 for the first end portion 11.

[0132] Optionally, as Figure 6 As shown, when the braided coil is in a compressed state, the length of the first end portion 11 is equal to the length of the first protection portion 13. When the braided coil is detached in the aneurysm, the braided coil is deformed and wound, that is, when the braided coil can be regarded as being in a non-compressed state, the first end portion 11 retracts, and the length of the first end portion 11 becomes less than the length of the first protection portion 13. Such a setting can prevent the end of the first end portion 11 close to the distal end from exceeding the first protection portion 13, and improves the protection strength of the first protection portion 13 for the first end portion 11.

[0133] Optionally, as Figure 7 As shown, when the braided coil is in a compressed state, the length of the first end portion 11 is less than the length of the first protection portion 13. When the braided coil is detached in the aneurysm, the braided coil is deformed and wound, that is, when the braided coil can be regarded as being in a non-compressed state, in this way, the first end portion 11 can further retract, and the length of the first end portion 11 becomes less than the length of the first protection portion 13. Such a setting improves the protection strength of the first protection portion 13 for the first end portion 11.

[0134] For the above three optional technical solutions, any one can be selected.

[0135] Sixth Embodiment

[0136] The inventor found that in the first or second or fourth or fifth embodiment, the texture of the first end portion 11 or the second end portion 12 of the braided coil is relatively hard, and there may be a risk of damaging the aneurysm wall and causing bleeding.

[0137] In view of this, the fifth embodiment is a further improvement based on any one of the first or second or fourth or fifth embodiments. The main improvement lies in the shape of the first end portion 11 or the second end portion 12. The specific solution regarding the shape of the first end portion 11 is as follows:

[0138] Optionally, as Figure 8As shown, during the formation of the first end portion 11 from multiple braided wires 10, the multiple braided wires 10 are divided into two parts. One part of the braided wires 10 is braided into a bundle of braided wires 10, and a fixed point is set at the connection between this bundle of braided wires 10 and the main body portion 14 of the embolization body 1 or a developing spring is set for point constraint, so as to prevent this bundle of braided wires 10 from being untied due to the braiding elasticity of the embolization body 1. Then this bundle of braided wires 10 is set in a spiral shape. This bundle of braided wires 10 in a spiral shape can be regarded as the first end portion 11, and the distal soft spring 2 is connected to the end of the first end portion 11 far from the embolization body 1. The other part of the braided wires 10 is also braided to form the first protection portion 13. The first end portion 11 is located within the first protection portion 13, that is, it can be regarded that the first protection portion 13 covers the first end portion 11. When braiding the first protection portion 13, the end of the first protection portion 13 close to the distal end is closed, and a closed structure as shown in Figure 8 is formed.

[0139] Optionally, as shown in Figure 9 , during the formation of the first end portion 11 from multiple braided wires 10, the multiple braided wires 10 are divided into two parts. One part of the braided wires 10 is braided into a bundle of braided wires 10, and a fixed point is set at the connection between this bundle of braided wires 10 and the main body portion 14 of the embolization body 1 or a developing spring is set for point constraint, so as to prevent this bundle of braided wires 10 from being untied due to the braiding elasticity of the embolization body 1. Then this bundle of braided wires 10 is set in a variable-diameter spiral shape. This bundle of braided wires 10 in a variable-diameter spiral shape can be regarded as the first end portion 11. The diameter of the end of the first end portion 11 close to the distal end is smaller than the diameter of the end of the first end portion 11 close to the embolization body 1, and the end with a smaller diameter of the first end portion 11 is connected to the distal soft spring 2. The other part of the braided wires 10 is also braided to form the first protection portion 13. The first end portion 11 is located within the first protection portion 13, that is, it can be regarded that the first protection portion 13 covers the first end portion 11. When braiding the first protection portion 13, the end of the first protection portion 13 close to the distal end is closed, and a closed structure as shown in Figure 9 is formed.

[0140] Either of the above two alternative technical solutions can be selected.

[0141] And the solutions regarding the shape of the second end portion 12 are as follows:

[0142] Optionally, as shown in Figure 8As shown, during the formation of the second end portion 12 of the multiple braided wires 10, the multiple braided wires 10 are divided into two parts. One part of the braided wires 10 is braided into a bundle of braided wires 10, and a fixed point is set at the connection between this bundle of braided wires 10 and the main body portion 14 of the embolization body 1 or a developing spring is set for point constraint, so as to prevent this bundle of braided wires 10 from being untied due to the braiding elasticity of the embolization body 1. Then this bundle of braided wires 10 is set in a spiral shape, and this bundle of braided wires 10 in a spiral shape can be regarded as the second end portion 12, and the second end portion 12 is connected to the developing end 3 at one end away from the embolization body 1. The other part of the braided wires 10 is also braided to form the second protection portion 15, and the second end portion 12 is located within the second protection portion 15, that is, it can be regarded that the second protection portion 15 covers the second end portion 12. When braiding the second protection portion 15, the end of the second protection portion 15 close to the proximal end is closed, and a closed structure as shown in Figure 8 is formed.

[0143] Optionally, as shown in Figure 9 , during the formation of the second end portion 12 of the multiple braided wires 10, the multiple braided wires 10 are divided into two parts. One part of the braided wires 10 is braided into a bundle of braided wires 10, and a fixed point is set at the connection between this bundle of braided wires 10 and the main body portion 14 of the embolization body 1 or a developing spring is set for point constraint, so as to prevent this bundle of braided wires 10 from being untied due to the braiding elasticity of the embolization body 1. Then this bundle of braided wires 10 is set in a variable-diameter spiral shape, and this bundle of braided wires 10 in a variable-diameter spiral shape can be regarded as the second end portion 12. The diameter of one end of the second end portion 12 close to the proximal end is smaller than the diameter of the end of the second end portion 12 close to the embolization body 1, and the end with a smaller diameter of the second end portion 12 is connected to the developing end 3. The other part of the braided wires 10 is also braided to form the second protection portion 15, and the second end portion 12 is located within the second protection portion 15, that is, it can be regarded that the second protection portion 15 covers the second end portion 12. When braiding the second protection portion 15, the end of the second protection portion 15 close to the proximal end is closed, and a closed structure as shown in Figure 9 is formed.

[0144] Either of the above two alternative technical solutions can be selected.

[0145] Seventh Embodiment

[0146] The inventor found that in the third embodiment, the first end portion 11 or the second end portion 12 of the braided spring coil is relatively hard, and there may be a risk of damaging the aneurysm wall and causing bleeding.

[0147] In view of this, the seventh embodiment is a further improvement based on the third embodiment, and the main improvement lies in the shape of the first end portion 11 or the second end portion 12. The specific solution regarding the shape of the first end portion 11 is as follows:

[0148] Optionally, as Figure 10 shown, during the process of forming the first end portion 11 of the plurality of braided wires 10, the plurality of braided wires 10 are braided into a bundle of braided wires 10, and a fixed point position is set at the connection between the bundle of braided wires 10 and the main body portion 14 of the embolization body 1 or a developing spring is set for point position constraint, so as to prevent the bundle of braided wires 10 from being untied due to the braiding elasticity of the embolization body 1. Then the bundle of braided wires 10 is set in a spiral shape, and the bundle of braided wires 10 in a spiral shape can be regarded as the first end portion 11, and the distal soft spring 2 is connected to the end of the first end portion 11 far from the embolization body 1.

[0149] Optionally, as Figure 11 shown, during the process of forming the first end portion 11 of the plurality of braided wires 10, the plurality of braided wires 10 are braided into a bundle of braided wires 10, and a fixed point position is set at the connection between the bundle of braided wires 10 and the main body portion 14 of the embolization body 1 or a developing spring is set for point position constraint, so as to prevent the bundle of braided wires 10 from being untied due to the braiding elasticity of the embolization body 1. Then the bundle of braided wires 10 is set in a variable-diameter spiral shape, and the bundle of braided wires 10 in a variable-diameter spiral shape can be regarded as the first end portion 11. The diameter of one end of the first end portion 11 close to the distal end is smaller than that of the end of the first end portion 11 close to the embolization body 1, and the end with a smaller diameter of the first end portion 11 is connected to the distal soft spring 2.

[0150] Either of the above two optional technical solutions can be selected.

[0151] And the solutions regarding the shape of the second end portion 12 are as follows:

[0152] Optionally, as Figure 10 shown, during the process of forming the second end portion 12 of the plurality of braided wires 10, the plurality of braided wires 10 are braided into a bundle of braided wires 10, and a fixed point position is set at the connection between the bundle of braided wires 10 and the main body portion 14 of the embolization body 1 or a developing spring is set for point position constraint, so as to prevent the bundle of braided wires 10 from being untied due to the braiding elasticity of the embolization body 1. Then the bundle of braided wires 10 is set in a spiral shape, and the bundle of braided wires 10 in a spiral shape can be regarded as the second end portion 12, and the developing end 3 is connected to the end of the second end portion 12 far from the embolization body 1.

[0153] Optionally, as Figure 11As shown, during the formation of the second end portion 12 of the multiple braided wires 10, the multiple braided wires 10 are braided into a bundle of braided wires 10, and a fixed point position is set at the connection between the bundle of braided wires 10 and the main body portion 14 of the embolization body 1 or a developing spring is provided for point position constraint, so as to prevent the bundle of braided wires 10 from being untied due to the braiding elasticity of the embolization body 1. Then, the bundle of braided wires 10 is set into a variable-diameter spiral shape, and the bundle of braided wires 10 in the variable-diameter spiral shape can be regarded as the second end portion 12. The diameter of one end of the second end portion 12 close to the proximal end is smaller than the diameter of the end of the second end portion 12 close to the embolization body 1, and the end with a smaller diameter of the second end portion 12 is connected to the developing end 3.

[0154] Any one of the above two optional technical solutions can be selected.

[0155] Eighth Embodiment

[0156] The inventor found that the braided spring coil in the shape of a network tube may be flattened due to extrusion in the aneurysm, and a sharp bending angle is formed at the flattened part. This sharp bending angle may penetrate the aneurysm wall and cause the risk of bleeding.

[0157] In view of this, the eighth embodiment is a further improvement based on any one of the first to seventh embodiments. The main improvement lies in the segmented design of the embolization body 1. The embolization body 1 includes a plurality of embolization sub-segments 17, and adjacent embolization sub-segments 17 are connected by a connecting member, specifically as follows:

[0158] Optionally, as Figure 12 shown, the connecting member can adopt a connecting spring 41, and the connecting spring 41 can adopt a developing spring. Among the plurality of embolization sub-segments 17, adjacent two embolization sub-segments 17 are connected by the connecting spring 41. Specifically, the structure of the embolization sub-segment 17 is the same as the structure of the embolization body 1. One end of the connecting spring 41 is connected to one end of an embolization sub-segment 17, and the other end of the connecting spring 41 is connected to one end of another embolization sub-segment 17. Of course, in some embodiments, a first protection portion 13 and a second protection portion 15 can be respectively provided at both ends of the embolization sub-segment, which can further prevent the two ends of the embolization sub-segment from damaging the aneurysm wall, and can also improve the embolization rate of the aneurysm.

[0159] Optionally, as Figure 13As shown, the connecting member can be a connecting wire 42, and the shape of the connecting wire 42 can be a straight wire or a wavy wire. The material of the connecting wire 42 is the same as that of the braided wire 10. Among multiple embolization segments 17, multiple connecting wires 42 are arranged between two adjacent embolization segments 17. Specifically, one end of multiple connecting wires 42 is connected to one end of an embolization segment 17, and the other end of multiple connecting wires 42 is connected to one end of another embolization segment 17, and multiple connecting wires 42 are evenly arranged around the axis of the embolization body 1. Of course, in some embodiments, a first protection part 13 and a second protection part 15 can be respectively arranged at both ends of the embolization segment, which can further prevent the two ends of the embolization segment from damaging the aneurysm wall and can also improve the embolization rate of the aneurysm.

[0160] Either of the above two optional technical solutions can be selected.

[0161] Compared with the prior art, the braided coil disclosed in this embodiment is designed in a segmented manner by making the embolization body 1 into multiple embolization segments, shortening the length of the embolization segments, reducing the risk that the embolization segments are squeezed and deformed to generate sharp bending angles, and at the same time connecting the embolization segments by using a connecting member, increasing the softness of the braided coil and further reducing the risk of bleeding caused by the embolization body 1 damaging the aneurysm wall. Of course, multiple stop gaps 16 are arranged on the embolization segments, which can further prevent the embolization segments from damaging the aneurysm.

[0162] The Ninth Embodiment

[0163] The Ninth Embodiment is a further improvement based on the Eighth Embodiment. The main improvement lies in that the braided coil further includes fiber hairs 43. The specific setting method of the fiber hairs 43 is as follows:

[0164] Optionally, not shown in the figure, multiple fiber hairs 43 are respectively arranged on each connecting spring 41. Such a setting can increase the embolization rate of the braided coil.

[0165] Optionally, as Figure 14 shown, the braided coil further includes multiple groups of fiber hairs 43, and multiple groups of fiber hairs 43 are arranged in sequence along the length direction of the embolization body 1. Multiple fiber hairs 43 in each group of fiber hairs 43 are respectively arranged on each connecting wire 42. In each group of fiber hairs 43, multiple fiber hairs 43 are evenly arranged around the axis of the embolization body 1. Such a setting can increase the embolization rate of the braided coil.

[0166] Optionally, as Figure 15 shown, the braided coil further includes multiple fiber hairs 43, and multiple fiber hairs 43 are respectively arranged on each connecting wire 42, and multiple fiber hairs 43 are arranged in a spiral shape around the axis of the embolization body 1. Such a setting can increase the embolization rate of the braided coil.

[0167] Tenth Embodiment

[0168] The present invention further provides a delivery system, which includes the braided spring coil of any one of the first to ninth embodiments. As Figure 2 shown, the developing end 3 of the braided spring coil is connected to one end of the pusher wire, and the braided spring coil is released in the aneurysm cavity by electrolytic detachment or mechanical detachment.

[0169] Finally, it should be noted that those of ordinary skill in the art can understand that in order to enable readers to better understand the present invention, many technical details are proposed in the embodiments of the present invention. However, even without these technical details and various changes and modifications based on the above embodiments, the technical solutions required to be protected by the claims of the present invention can be basically realized. Therefore, in practical applications, various changes can be made to the above embodiments in form and details without departing from the spirit and scope of the present invention.

Claims

1. A braided spring coil, characterized in that: include: The embolism body is woven into a mesh tube shape by a plurality of braided wires; the two ends of the embolism body are respectively a first end and a second end; A first protection part, which is covered at the first end; the diameter of the first protection part is the same as the diameter of the plug body, or the diameter of one end of the first protection part is larger than the diameter of the other end, and the diameter of the end of the first protection part with a smaller diameter is the same as the diameter of the plug body; A second protection portion, which is covered at the second end portion; the diameter of the second protection portion is the same as the diameter of the plug body, or the diameter of one end of the second protection portion is larger than the diameter of the other end, and the diameter of the end of the second protection portion with a larger diameter is the same as the diameter of the plug body; The braiding density of the first protection portion is greater than the braiding density of the first end portion; When the braided spring coil is in a compressed state, the length of the first end portion is greater than, equal to, or less than the length of the first protection portion; When the braided spring coil is in a non-compressed state, the length of the first end portion is smaller than the length of the first protecting portion.

2. The braided spring coil according to claim 1, characterized in that: The diameter of the braided wire is 0.01-0.03 mm; the diameter of the embolism body is 0.5-1.5 mm.

3. The braided spring coil according to claim 1, characterized in that: The end of the first protection portion close to the distal end is a closed structure; and / or, One end of the second protecting portion close to the proximal end is a closed structure; and the weaving density of the second protecting portion is greater than the weaving density of the second end portion.

4. The braided spring coil according to any one of claims 1 to 3, characterized in that: A distal soft spring, disposed at the first end; The developing end is spherical or hemispherical; the developing end is arranged at the second end.

5. The braided spring coil according to claim 4, characterized in that: When the braided spring coil is in a compressed state, the length of the second end portion is greater than, equal to, or less than the length of the second protection portion; When the braided spring coil is in a non-compressed state, the length of the second end portion is smaller than the length of the second protecting portion.

6. The braided spring coil according to claim 1, characterized in that: The first end is in a spiral shape, and one end is connected to the plug body; or the first end is in a variable diameter spiral shape, and the end with a larger diameter is connected to the plug body; and / or, The second end is in a spiral shape, and one end is connected to the plug body; or the second end is in a variable diameter spiral shape, and the end with a larger diameter is connected to the plug body.

7. The braided spring coil according to claim 1, characterized in that: The coverage rate of the first end portion is 5-30%, the coverage rate of the first protection portion is 5-40%, and when the first protection portion is covered on the first end portion, the coverage rate of the structure formed by the two is 10-60%; and / or, The coverage rate of the second end portion is 5-30%, the coverage rate of the second protection portion is 5-40%, and when the second protection portion is covered on the second end portion, the coverage rate of the structure formed by the two is 10-60%.

8. The braided spring coil according to claim 1, characterized in that: The plug body comprises a plurality of plug sub-segments, and two adjacent plug sub-segments are connected via a connecting spring.

9. The braided spring coil according to claim 1, characterized in that: The embolic body comprises a plurality of embolic sub-segments, and two adjacent embolic sub-segments are connected by a plurality of connecting wires; the plurality of connecting wires are evenly arranged around the axis of the embolic body; the connecting wires are straight wires or wavy wires.

10. The braided spring coil according to claim 9, characterized in that: Also includes: A plurality of fiber hairs are respectively arranged on a plurality of connecting wires; A plurality of fiber hairs are arranged in a spiral shape around the axis of the plug body.

11. A braided spring coil, characterized in that: include: The plug body is woven into a mesh tube shape by a plurality of braided wires; the wire diameter of the braided wires is 0.01-0.03 mm; the diameter of the plug body is 0.5-1.5 mm; a plurality of groups of crack stoppers are arranged on the plug body, and the plurality of groups of crack stoppers are arranged in sequence along the length direction of the plug body; the two ends of the plug body are respectively a first end and a second end; A first protection part, which is covered at the first end; the diameter of the first protection part is the same as the diameter of the plug body, or the diameter of one end of the first protection part is larger than the diameter of the other end, and the diameter of the end of the first protection part with a smaller diameter is the same as the diameter of the plug body; A second protection portion, which is covered at the second end portion; the diameter of the second protection portion is the same as the diameter of the plug body, or the diameter of one end of the second protection portion is larger than the diameter of the other end, and the diameter of the end of the second protection portion with a larger diameter is the same as the diameter of the plug body; The braiding density of the first protection portion is greater than the braiding density of the first end portion; When the braided spring coil is in a compressed state, the length of the first end portion is greater than, equal to, or less than the length of the first protection portion; When the braided spring coil is in a non-compressed state, the length of the first end portion is smaller than the length of the first protection portion; A distal soft spring, disposed at the first end; The developing end is spherical or hemispherical; the developing end is arranged at the second end.

12. The braided spring coil according to claim 11, characterized in that: Each group of crack stop openings includes at least two crack stop openings, and the at least two crack stop openings are respectively arranged on both sides of the plug body along the length direction thereof.

13. The braided spring coil according to claim 12, characterized in that: The distance between two adjacent crack-stopping openings located on the same side of the plug body is 2 to 44 mm.

14. The braided spring coil according to claim 11, characterized in that: One end of the first protection portion close to the distal end is a closed structure.

15. The braided spring coil according to any one of claims 11 to 14, characterized in that: One end of the second protection portion close to the proximal end is a closed structure; The braiding density of the second protection portion is greater than the braiding density of the second end portion.

16. The braided spring coil according to claim 15, characterized in that: When the braided spring coil is in a compressed state, the length of the second end portion is greater than, equal to, or less than the length of the second protection portion; When the braided spring coil is in a non-compressed state, the length of the second end portion is smaller than the length of the second protecting portion.

17. The braided spring coil according to claim 15, characterized in that: The first end is in a spiral shape, and one end is connected to the plug body; or the first end is in a variable diameter spiral shape, and the end with a larger diameter is connected to the plug body; and / or, The second end is in a spiral shape, and one end is connected to the plug body; or the second end is in a variable diameter spiral shape, and the end with a larger diameter is connected to the plug body.

18. The braided spring coil according to claim 11, characterized in that: The first end is in a spiral shape or a spiral shape with a reduced diameter; and / or the second end is in a spiral shape or a spiral shape with a reduced diameter.

19. The braided spring coil according to claim 11, characterized in that: The plug body comprises a plurality of plug sub-segments, and two adjacent plug sub-segments are connected via a connecting spring.

20. The braided spring coil according to claim 11, characterized in that: The embolic body comprises a plurality of embolic sub-segments, and two adjacent embolic sub-segments are connected by a plurality of connecting wires; the plurality of connecting wires are evenly arranged around the axis of the embolic body; the connecting wires are straight wires or wavy wires.

21. The braided spring coil according to claim 20, characterized in that: Also includes: A plurality of fiber hairs are arranged on the connecting wire; A plurality of fiber hairs are evenly arranged around the axis of the plug body; Alternatively, a plurality of fiber hairs are arranged in a spiral shape around the axis of the embolic body.

22. The braided spring coil according to claim 11, characterized in that: The braided wires used to form the embolic body are nickel-titanium-platinum wires; or, The braided wires used to form the embolic body are nickel-titanium wires and platinum-iridium wires; or, The braided wires that are braided into the embolic body are made of polymer materials.

23. A conveying system, characterized in that: include: A braided spring coil as claimed in any one of claims 1 to 22; The braided spring coil is released in the aneurysm cavity by electrolytic release or mechanical release.

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