Knitted spring ring and conveying system

Abstract

The invention relates to the technical field of aneurysm spring rings, in particular to a woven spring ring, which comprises an embolism body, a plurality of woven wires, a plurality of elastic elements and a plurality of elastic elements, two ends of the plug body are respectively a first end part and a second end part; the first protection part covers the first end part; the diameter of the first protection part is the same as that of the embolism body, or the diameter of one end of the first protection part is larger than that of the other end, and the diameter of the smaller end of the first protection part is the same as that of the embolism body; and / or the second protection part covers the second end part; the diameter of the second protection part is the same as that of the embolism body, or the diameter of one end of the second protection part is larger than that of the other end of the second protection part, and the diameter of the larger end of the second protection part is the same as that of the embolism body. The invention also relates in particular to a conveying system.

Description

Technical Field

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

[0002] Endovascular intervention is one of the main treatment methods for aneurysms. Endovascular intervention mainly uses coil technology and related stent-assisted embolization technology. In the early stage, only bare metal coil products are usually used. Usually, multiple coil products are implanted in the aneurysm cavity, but the purpose of complete embolization has not been achieved.

[0003] With the iteration and replacement of products, spring coil technology has also developed a variety of spring coil products. For example, the invention patent with publication number CN102302377A discloses a mesh-shaped embolic spring and its preparation method. The mesh-shaped embolic spring is woven from nickel-titanium alloy wire and platinum wire into a mesh-shaped spiral spring coil or a mesh-shaped space mesh spring. The mesh-shaped spring coil is woven from nickel-titanium alloy wire and platinum wire into a mesh tube shape. The nickel-titanium alloy wire has a good shape memory function. After the mesh-shaped embolic spring made of nickel-titanium alloy wire is placed in the aneurysm, the spring will be more stable and easier to fill the aneurysm space. The mesh-shaped embolic spring has a multi-mesh structure, and the dense mesh is more likely to cause embolism, shorten the aneurysm embolization time, prevent aneurysm rupture, and effectively prevent vascular embolism. This mesh-shaped embolic spring also has the following disadvantages: 1. When the mesh-shaped embolic spring bends and deforms in the aneurysm, the mesh-shaped structure may be flattened due to extrusion, and a rupture may be formed at the flattened part. Figure 1 The sharp bend angle shown may penetrate the aneurysm wall and create a risk of bleeding.

[0004] 2. The distal end of the distal spring is connected to the distal end of the mesh-shaped spring coil, and the transition of the overall hardness of the mesh-shaped embolization spring coil at the connection between the two is quite abrupt, and the connection between the two may also cause aneurysm rupture and bleeding.

[0005] 3. After the proximal end of the mesh tube coil is released, the harder proximal end may penetrate the aneurysm wall and cause the risk of bleeding. Summary of the invention

[0006] In order to solve or at least partially solve the above technical problems, the present invention provides a braided spring coil and a delivery system.

[0007] The present invention provides a braided spring coil, which comprises: 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 portion, which is covered at the first end; the diameter of the first protection portion is the same as the diameter of the plug body, or the diameter of one end of the first protection portion is larger than the diameter of the other end, and the diameter of the end of the first protection portion with a smaller diameter is the same as the diameter of the plug body; and / or, The second protection part is covered at the second end; the diameter of the second protection part is the same as the diameter of the plug body, or the diameter of one end of the second protection part is larger than the diameter 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 plug body.

[0008] Furthermore, the diameter of the braided wire is 0.01-0.03 mm; the diameter of the embolization body is 0.5-1.5 mm.

[0009] Further, one end of the first protection portion close to the distal end is a closed structure; the weaving density of the first protection portion is greater than the weaving density of the first end portion; 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.

[0010] Furthermore, the braided spring coil also includes a distal soft spring and a developing end, wherein the distal soft spring is arranged at the first end; the developing end is spherical or hemispherical; and the developing end is arranged at the second end.

[0011] Furthermore, 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 protecting 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 protecting portion.

[0012] Further, 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.

[0013] Furthermore, 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%.

[0014] Furthermore, the plug body includes a plurality of plug sub-segments, and two adjacent plug sub-segments are connected via a connecting spring.

[0015] Furthermore, 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.

[0016] Furthermore, the braided spring coil also 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 arranged in a spiral shape around the axis of the embolization body.

[0017] The present invention provides another braided spring coil, which includes an embolic body, a distal soft spring, and a developing end. The embolic body is woven into a mesh tube shape by multiple braided wires; the wire diameter of the braided wires is 0.01-0.03 mm; the diameter of the embolic body is 0.5-1.5 mm; the embolic body is provided with multiple groups of crack stop openings, and the multiple groups of crack stop openings are arranged in sequence along the length direction of the embolic body; the two ends of the embolic body are respectively a first end and a second end; the distal soft spring is arranged at the first end; the developing end is spherical or hemispherical; and the developing end is arranged at the second end.

[0018] Furthermore, 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.

[0019] Furthermore, the distance between two adjacent crack-stopping openings located on the same side of the plug body is 2 to 44 mm.

[0020] Furthermore, the plug body is provided with a first protection portion which is covered on the first end portion; one end of the first protection portion close to the distal end is a closed structure; the braiding density of the first protection portion is greater than the braiding density of the first end portion; 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 with a smaller diameter of the first protection part is the same as the diameter of the plug body.

[0021] Furthermore, the plug body is provided with a second protection portion which is covered on the second end portion; 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; The diameter of the second protection part is the same as the diameter of the plug body, or the diameter of one end of the second protection part is larger than the diameter 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 plug body.

[0022] Furthermore, 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 protecting 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 protecting portion.

[0023] Further, 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.

[0024] Furthermore, 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.

[0025] Furthermore, the plug body includes a plurality of plug sub-segments, and two adjacent plug sub-segments are connected via a connecting spring.

[0026] Furthermore, 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.

[0027] Furthermore, the braided spring coil further comprises a plurality of fiber hairs, and the plurality of fiber hairs are arranged on the connecting wire; The plurality of fiber hairs are evenly arranged around the axis of the embolic body; or, the plurality of fiber hairs are spirally arranged around the axis of the embolic body.

[0028] Furthermore, the braided wires used to form the embolic body are made of 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.

[0029] The present invention further provides a delivery system, which comprises: a braided spring coil as described in any one of the above items, wherein the braided spring coil is released in the aneurysm cavity by electrolytic release or mechanical release.

[0030] Compared with the prior art, the braided spring coil disclosed in this embodiment provides a first protective portion on the embolic body, and uses the first protective portion to cover and protect the first end and the connection between the first end and the distal spring, so that the transition of the braided spring coil is smooth, thereby reducing the risk of the first end causing damage to the aneurysm wall and causing bleeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the relevant drawings. It is understood that the drawings described below are only used to illustrate some embodiments of the present invention, and those skilled in the art can also obtain many other technical features and connection relationships not mentioned in this document based on these drawings.

[0032] Figure 1 It is a background technology diagram; Figure 2 It is a schematic diagram of an embodiment of a conveying system of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of an embodiment of a braided spring coil in a compressed state according to the present invention. Figure 1 ; Figure 4 This is a schematic diagram of an embodiment of a braided spring coil in a compressed state according to the present invention. Figure 2 ; Figure 5 It is a schematic diagram of an embodiment of a conveying system of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of an embodiment of a braided spring coil in a compressed state according to the present invention. Figure 3 ; Figure 7 This is a schematic diagram of an embodiment of a braided spring coil in a compressed state according to the present invention. Figure 4 ; Figure 8 This is a schematic diagram of an embodiment of a braided spring coil in a compressed state according to the present invention. Figure 5 ; Fig. 9 This is a schematic diagram of an embodiment of a braided spring coil in a compressed state according to the present invention. Figure 6 ; Fig.10 This is a schematic diagram of an embodiment of a braided spring coil in a compressed state according to the present invention. Figure 7 ; Fig.11 This is a schematic diagram of an embodiment of a braided spring coil in a compressed state according to the present invention. Figure 8 ; Fig.12 This is a schematic diagram of an embodiment of a braided spring coil in a compressed state according to the present invention. Figure 9 ; Fig.13 This is a schematic diagram of an embodiment of a braided spring coil in a compressed state according to the present invention. Figure 10 ; Fig.14 A schematic diagram of an embodiment of the present invention in which fiber hairs of a braided spring coil are connected to a connecting wire Figure 1 ; Fig.15 A schematic diagram of an embodiment of the present invention in which fiber hairs of a braided spring coil are connected to a connecting wire Figure 2 .

[0033] Description of reference numerals: 1. Plug body; 10. Braided wire; 11. First end; 12. Second end; 13. First protection part; 14. Main body; 15. Second protection part; 16. Stop crack; 17. Plug sub-segment; 2. Distal soft spring; 3. Development end; 41. Connecting spring; 42. Connecting wire; 43. Fiber hair. DETAILED DESCRIPTION

[0034] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0035] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0036] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. 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.

[0037] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" 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 a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection 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.

[0038] Unless otherwise specified, the term "plurality" means two or more and "plurality" means two or more.

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0040] In the present invention, the distal end refers to the end away from the operator during surgery, and the proximal end refers to the end close to the operator during surgery.

[0041] The inventors found that when the mesh-tube embolic spring bends and deforms in the aneurysm, the end of the mesh-tube embolic spring close to the distal end is harder and may also damage the aneurysm wall, resulting in the risk of bleeding.

[0042] When solving the above technical problems, the inventors also searched the prior art, and the search results include: Prior art 1 is a mesh-shaped embolic spring and a preparation method thereof, the publication number of the invention patent application being CN102302377A; Prior art 2 is a spring coil with the utility model patent publication number CN203885554U; Prior art 3 is a mesh spring coil and a preparation method thereof, the publication number of the invention patent application being CN104758025A.

[0043] The technical solutions disclosed in the three prior arts do not solve the technical problems found by the inventor. In view of this, the inventor of the present invention provides a braided spring coil to solve the above problems. Several specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0044] First embodiment A braided spring coil mentioned in this embodiment, such as Figure 2 As shown, the braided spring coil includes an embolic body 1, a distal soft spring 2, and a developing end 3. The embolic body 1 is woven into a mesh tube structure by a plurality of braided wires 10. Optionally, the embolic body 1 is woven into a mesh tube structure by 4 to 48 braided wires 10. The wire diameter of the braided wires 10 used in the embolic body 1 is 0.01 mm to 0.03 mm, and the diameter of the embolic body 1 is 0.5 mm to 1.5 mm. One end of the embolic body 1 is a first end 11, and the other end of the embolic body 1 is a second end 12. A first protective portion 13 is provided on the embolic body 1, and the first protective portion 13 is covered on the first end 11 of the embolic body 1.

[0045] Specifically, after the main body 14 of the plug body 1 is braided by the plurality of braided wires 10, one end of the plug body 1 is braided to form the second end 12, the diameter of one end of the second end 12 is larger than the diameter of the other end, the end of the second end 12 with a larger diameter is connected to the main body 14 of the plug body 1, and the end of the second end 12 with a smaller diameter is connected to the developing end 3, that is, the second end 12 is a narrow-mouth structure. The developing end 3 is spherical or hemispherical.

[0046] Similarly, the plurality of braided wires 10 are divided into two parts. One part of the braided wires 10 is braided on the other end of the embolic body 1 to form a first end 11, and the first end 11 is a narrow-mouthed structure. One end of the distal soft spring 2 is connected to the end with a smaller diameter of the first end 11. Another part of the braided wires 10 is also braided on the other end of the embolic body 1 to form a first protective portion 13. The first end 11 is located inside the first protective portion 13, that is, the first protective portion 13 can be regarded as being covered by the first end 11. When the first protective portion 13 is braided, the end of the first protective portion 13 close to the distal end is closed to form a structure as shown in FIG. Figure 2 The closed structure shown.

[0047] Compared with the prior art, the braided spring coil disclosed in this embodiment provides a first protection portion 13 on the embolic body 1, and uses the first protection portion 13 to cover and protect the first end portion 11 and the connection between the first end portion 11 and the distal spring, so that the transition of the braided spring coil is smooth, thereby reducing the risk of the first end portion 11 damaging the aneurysm wall and causing bleeding.

[0048] Optionally, the coverage rate of the main body 14 of the embolization body 1 braided by the plurality of braided wires 10 is 10% to 40%. The coverage rate of the second end 12 is 5% to 30%. The coverage rate of the first end 11 is 5% to 30%, and the coverage rate of the first protection portion 13 is 5% to 40%. When the first protection portion 13 is covered on the first end 11, the coverage rate of the structure formed by the first protection portion 13 and the first end 11 is 10% to 60%. Such a setting can increase the embolization rate of the braided spring coil in the aneurysm.

[0049] In this embodiment, the first protection portion 13 is specifically configured as follows: Alternatively, if Figure 2 As shown, the diameter of the first protection portion 13 is the same as the diameter of the plug body 1. Such a configuration facilitates the connection between the first protection portion 13 and the plug body 1, and also facilitates the covering and protection of the first end portion 11 and the connection between the first end portion 11 and the distal spring.

[0050] Alternatively, if Figure 3As shown, the diameter of the end of the first protection part 13 close to the distal end is larger than the diameter of the end of the first protection part 13 close to the plug body 1, and the diameter of the end of the first protection part 13 with a smaller diameter is the same as the diameter of the plug body 1. Such a configuration is not only convenient for connecting the first protection part 13 with the plug body 1, but also convenient for using the end of the first protection part 13 with a larger diameter to cover and protect the first end 11 and the connection between the first end 11 and the distal spring, so as to prevent the first end 11 from causing damage to the aneurysm wall.

[0051] Optionally, the braiding density of the first protection portion 13 is greater than the braiding density of the first end portion 11. Such a configuration can further enhance the protection of the first protection portion 13 to the first end portion 11.

[0052] You can choose any one of the three optional technical solutions mentioned above.

[0053] Of course, the optional technical solution that the braiding density of the first protecting 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 protecting portion 13 .

[0054] Second embodiment The inventors found that when the mesh-tube embolic spring bends and deforms in the aneurysm, the end of the mesh-tube embolic spring close to the proximal end is harder and may also damage the aneurysm wall, resulting in the risk of bleeding.

[0055] A braided spring coil mentioned in this embodiment, such as Figure 2 As shown, the braided spring coil includes an embolic body 1, a distal soft spring 2, and a developing end 3. The embolic body 1 is woven into a mesh tube structure by a plurality of braided wires 10. Optionally, the embolic body 1 is woven into a mesh tube structure by 4 to 48 braided wires 10. The wire diameter of the braided wires 10 used in the embolic body 1 is 0.01 mm to 0.03 mm, and the diameter of the embolic body 1 is 0.5 mm to 1.5 mm. One end of the embolic body 1 is a first end 11, and the other end of the embolic body 1 is a second end 12. A second protective portion 15 is provided on the embolic body 1, and the second protective portion 15 is covered on the second end 12 of the embolic body 1.

[0056] Specifically, after the main body 14 of the plug body 1 is braided with a plurality of braided wires 10, one end of the plug body 1 is braided to form a first end 11, and the diameter of one end of the first end 11 is larger than the diameter of the other end thereof, that is, the first end 11 is a narrow mouth-shaped structure. The end of the first end 11 with a larger diameter is connected to the main body 14 of the plug body 1, and the end of the first end 11 with a smaller diameter is connected to one end of the distal soft spring 2.

[0057] Similarly, the plurality of braided wires 10 are divided into two parts. One part of the braided wires 10 is braided on the other end of the plug body 1 to form a second end 12. The second end 12 is a narrow mouth structure. The developing end 3 is connected to the end with a smaller diameter of the second end 12. The other part of the braided wires 10 is also braided on the other end of the plug body 1 to form a second protective portion 15. The second end 12 is located inside the second protective portion 15, that is, the second protective portion 15 can be regarded as being covered by the second end 12. When the second protective portion 15 is braided, the end of the second protective portion 15 close to the proximal end is closed to form a structure as shown in FIG. Figure 2 The closed structure shown.

[0058] Compared with the prior art, the braided spring coil disclosed in this embodiment provides a second protection portion 15 on the embolization body 1, and utilizes the developing end 3 to constrain the braided wire 10. The spherical or hemispherical developing end 3 reduces damage to the aneurysm. At the same time, the second protection portion 15 is utilized to cover and protect the second end 12, further reducing the risk of the second end 12 damaging the aneurysm wall and causing bleeding.

[0059] Optionally, the coverage rate of the main body 14 of the embolization body 1 braided by the 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 portion 15 is 5% to 40%. When the second protection portion 15 is covered on the second end 12, the coverage rate of the structure formed by the second protection portion 15 and the second end 12 is 10% to 60%. Such a setting can increase the embolization rate of the braided spring coil in the aneurysm.

[0060] In this embodiment, the second protection portion 15 is specifically configured as follows: Alternatively, if Figure 2 As shown, the diameter of the second protection portion 15 is the same as the diameter of the plug body 1. Such a configuration facilitates the connection between the second protection portion 15 and the plug body 1, and also facilitates the protection of the first end portion 11.

[0061] Alternatively, if Figure 3 As shown, the diameter of the end of the second protection part 15 close to the plug body 1 is larger than the diameter of the end of the second protection part 15 close to the proximal end, and the diameter of the end of the second protection part 15 with a larger diameter is the same as the diameter of the plug body 1. Such a configuration is not only convenient for connecting the second protection part 15 with the plug body 1, but also convenient for using the end of the second protection part 15 with a smaller diameter to protect the second end 12, thereby preventing the second end 12 from causing damage to the aneurysm wall.

[0062] Optionally, the braiding density of the second protection portion 15 is greater than the braiding density of the second end portion 12. Such a configuration can further enhance the protection of the second protection portion 15 to the second end portion 12.

[0063] You can choose any one of the three optional technical solutions mentioned above.

[0064] Of course, the optional technical solution that the braiding density of the second protecting portion 15 is greater than the braiding density of the second end portion 12 can also be combined with the above two technical solutions regarding the diameter of the second protecting portion 15 .

[0065] Third embodiment The inventors have found that when the mesh-tube embolic spring is bent and deformed in the aneurysm, the mesh-tube structure may be flattened due to extrusion, and a crack such as Figure 1 The sharp bend angle shown may penetrate the aneurysm wall and create a risk of bleeding.

[0066] The braided spring coil mentioned in this embodiment, as shown in Figures 1 to 3, comprises an embolic body 1, a distal soft spring 2, and a developing end 3. The embolic body 1 is woven into a mesh tube structure by a plurality of braided wires 10. Optionally, the embolic body 1 is woven into a mesh tube structure by 4 to 48 braided wires 10. The wire diameter of the braided wires 10 used in the embolic body 1 is 0.01 mm to 0.03 mm, and the diameter of the embolic body 1 is 0.5 mm to 1.5 mm. One end of the embolic body 1 is a first end 11, and the other end of the embolic body 1 is a second end 12. One end of the distal soft spring 2 is connected to the first end 11 of the embolic body 1. The developing end 3 is arranged at the second end 12 of the embolic body 1, and the developing end 3 is spherical or hemispherical.

[0067] In this embodiment, the plug body 1 has a plurality of groups of crack stoppers 16, and the arrangement of the crack stoppers 16 is specifically as follows: Optionally, not shown in the figure, multiple groups of crack stop openings 16 are sequentially arranged at intervals along the length direction of the plug body 1. Each group of crack stop openings 16 includes two crack stop openings 16, which are respectively located on both sides of the plug body 1 along its length direction and are symmetrically arranged. On the same side of the plug body 1 along its length direction, the distance between two adjacent crack stop openings 16 is 2 mm to 44 mm.

[0068] Alternatively, if Figure 4As shown, multiple groups of crack stop openings 16 are sequentially arranged at intervals along the length direction of the plug body 1. Each group of crack stop openings 16 includes two crack stop openings 16, which are respectively located on both sides of the plug body 1 along its length direction and are staggered. In the same group of crack stop openings 16, the distance between the two crack stop openings 16 located on both sides of the plug body 1 is 1mm to 3mm. On the same side of the plug body 1 along its length direction, the distance between two adjacent crack stop openings 16 is 2mm to 44mm.

[0069] Alternatively, if Figure 5 As shown, multiple groups of crack stop openings 16 are sequentially arranged at intervals along the length direction of the plug body 1. Each group of crack stop openings 16 may also include three or more crack stop openings 16. When each group of crack stop openings 16 includes three crack stop openings 16, one crack stop opening 16 is located on one side of the plug body 1, and the remaining two crack stop openings 16 are located on the other side of the plug body 1.

[0070] You can choose any one of the three optional technical solutions mentioned above.

[0071] Compared with the prior art, the braided spring coil disclosed in this embodiment is used to avoid the risk of sharp bending angles when the embolic body 1 is flattened by setting a crack stop 16 on the embolic body 1. When the embolic body 1 is bent and deformed in the aneurysm cavity, after the embolic body 1 is flattened, the embolic body 1 avoids the generation of sharp bending angles on the embolic body 1 through the coordinated coordination of the four technical features of the diameter of the braided wire 10, the diameter of the embolic body 1, the setting method of the crack stop 16, and the distance between adjacent crack stop 16. That is, the crack stop 16 is preset in advance at the place where the embolic body 1 will be flattened and a sharp bending angle will be generated, thereby avoiding the generation of sharp bending angles and reducing the risk of the braided spring coil penetrating the aneurysm wall and causing bleeding.

[0072] Optionally, the coverage of the embolic body 1 braided by the plurality of braided wires 10 is 10% to 40%. In this way, the embolic body 1 can have sufficient softness when provided with the crack stopper 16, thereby avoiding damage to the aneurysm.

[0073] Fourth embodiment The braided spring coil mentioned in this embodiment has a technical solution as follows: Optionally, the first embodiment is combined with the second embodiment.

[0074] Optionally, the first embodiment is combined with the third embodiment.

[0075] Optionally, the second embodiment is combined with the third embodiment.

[0076] Optionally, the first embodiment, the second embodiment and the third embodiment are combined.

[0077] You can choose any one of the above four optional technical solutions.

[0078] In this embodiment, the selection of the material of the braided wire 10 is as follows: 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] Fifth embodiment 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.

[0084] 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 12. The specific solution is as follows: Alternatively, if Figure 3 As 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 is deformed and wound, that is, the braided spring coil can be regarded as being in a non-compressed state, the second end portion 12 is retracted, and the length of the second end portion 12 is 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, thereby improving the protection strength of the second protection portion 15 on the second end portion 12.

[0085] Alternatively, if Figure 6As 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 is deformed and wound, that is, the braided spring coil can be regarded as being in a non-compressed state, the second end portion 12 is retracted, and the length of the second end portion 12 is smaller 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, thereby improving the protection strength of the second protection portion 15 on the second end portion 12.

[0086] Alternatively, if Figure 7 As 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 is deformed and wound, that is, the braided spring coil can be regarded as being in a non-compressed state, so that the second end portion 12 can be further retracted and the length of the second end portion 12 is less than the length of the second protection portion 15. Such a setting improves the protection strength of the second protection portion 15 on the two ends.

[0087] You can choose any one of the three optional technical solutions mentioned above.

[0088] Of course, the first or fourth embodiment can be further improved with reference to the above three optional technical solutions, and the main improvement lies in the length of the first end, as follows: Alternatively, if Figure 3 As shown, when the braided spring 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 spring coil is released in the aneurysm, the braided spring coil is deformed and wound, that is, the braided spring coil can be regarded as being in a non-compressed state, the first end portion 11 is retracted, and the length of the first end portion 11 is 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, thereby improving the protection strength of the first protection portion 13 on the first end portion 11.

[0089] Alternatively, if Figure 6 As shown, when the braided spring 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 spring coil is released in the aneurysm, the braided spring coil is deformed and wound, that is, the braided spring coil can be regarded as being in a non-compressed state, the first end portion 11 is retracted, and the length of the first end portion 11 is smaller 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, thereby improving the protection strength of the first protection portion 13 on the first end portion 11.

[0090] Alternatively, if Figure 7As shown, when the braided spring 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 spring coil is released in the aneurysm, the braided spring coil is deformed and wound, that is, the braided spring coil can be regarded as being in a non-compressed state, so that the first end portion 11 can be further retracted and the length of the first end portion 11 is less than the length of the first protection portion 13. Such a setting improves the protection strength of the first protection portion 13 on the two ends.

[0091] You can choose any one of the three optional technical solutions mentioned above.

[0092] Sixth embodiment The inventors have found that in the first, second, fourth or fifth embodiment, the first end 11 or the second end 12 of the braided spring coil is relatively hard, which may cause damage to the aneurysm wall and cause bleeding.

[0093] In view of this, the fifth embodiment is a further improvement based on any one of the first, second, fourth or fifth embodiments, and the main improvement lies in the shape of the first end 11 or the second end 12. The specific solution for the shape of the first end 11 is as follows: Alternatively, if Figure 8 As shown, in the process of forming the first end 11 by 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 the bundle of braided wires 10 and the main part 14 of the embolic body 1, or a developing spring is set to constrain the point, so as to prevent the bundle of braided wires 10 from being untied due to the braiding elastic force of the embolic body 1. Afterwards, the bundle of braided wires 10 is set into a spiral shape. The spiral-shaped bundle of braided wires 10 can be regarded as the first end 11, and the end of the first end 11 away from the embolic body 1 is connected to the distal soft spring 2. The other part of the braided wires 10 is also woven to form the first protective part 13. The first end 11 is located in the first protective part 13, that is, it can be regarded as the first protective part 13 covered by the first end 11. When the first protective part 13 is woven, the end of the first protective part 13 close to the distal end is closed to form the first protective part 13 as shown in FIG. Figure 8 The closed structure shown.

[0094] Alternatively, if Fig. 9As shown, in the process of forming the first end 11 by 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 the bundle of braided wires 10 and the main part 14 of the embolic body 1, or a developing spring is set to constrain the point, so as to prevent the bundle of braided wires 10 from being untied due to the braiding elastic force of the embolic body 1. Afterwards, the bundle of braided wires 10 is set into a variable diameter spiral shape. The bundle of braided wires 10 in the shape of a variable diameter spiral can be regarded as the first end 11. The diameter of the end of the first end 11 close to the distal end is smaller than the end of the first end 11 close to the embolic body 1, and the end of the first end 11 with a small diameter is connected to the distal soft spring 2. The other part of the braided wires 10 is also braided to form the first protective part 13. The first end 11 is located in the first protective part 13, that is, it can be regarded as the first protective part 13 is covered by the first end 11. When the first protective part 13 is braided, the end of the first protective part 13 close to the distal end is closed to form the first protective part 13 as shown in FIG. Fig. 9 The closed structure shown.

[0095] You can choose any one of the two optional technical solutions mentioned above.

[0096] The shape of the second end 12 is as follows: Alternatively, if Figure 8 As shown, in the process of forming the second end 12 with multiple braided wires 10, the multiple braided wires 10 are divided into two parts. One part of the braided wires 10 is woven into a bundle of braided wires 10, and a fixed point is set at the connection between the bundle of braided wires 10 and the main part 14 of the embolic body 1, or a developing spring is set to constrain the point, so as to prevent the bundle of braided wires 10 from being untied due to the braiding elastic force of the embolic body 1. Afterwards, the bundle of braided wires 10 is set into a spiral shape. The spiral-shaped bundle of braided wires 10 can be regarded as the second end 12, and the end of the second end 12 away from the embolic body 1 is connected to the developing end 3. The other part of the braided wires 10 is also woven to form a second protective part 15, and the second end 12 is located in the second protective part 15, that is, the second protective part 15 can be regarded as covering the second end 12. When the second protective part 15 is woven, the end of the second protective part 15 close to the proximal end is closed to form the second protective part 15 as shown in FIG. Figure 8 The closed structure shown.

[0097] Alternatively, if Fig. 9As shown, in the process of forming the second end 12 with 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 the bundle of braided wires 10 and the main part 14 of the embolic body 1, or a developing spring is set to constrain the point, so as to prevent the bundle of braided wires 10 from being untied due to the braiding elastic force of the embolic body 1. Afterwards, the bundle of braided wires 10 is set into a variable diameter spiral shape. The bundle of braided wires 10 in the shape of a variable diameter spiral can be regarded as the second end 12. The diameter of the end of the second end 12 close to the proximal end is smaller than the end of the second end 12 close to the embolic body 1, and the end of the second end 12 with a small diameter is connected to the developing end 3. The other part of the braided wires 10 is also woven to form a second protective part 15. The second end 12 is located in the second protective part 15, that is, it can be regarded as the second protective part 15 covered by the second end 12. When the second protective part 15 is woven, the end of the second protective part 15 close to the proximal end is closed to form the second protective part 15 as shown in the figure. Fig. 9 The closed structure shown.

[0098] You can choose any one of the two optional technical solutions mentioned above.

[0099] Seventh embodiment The inventors found that in the third embodiment, the first end 11 or the second end 12 of the braided spring coil is relatively hard, which may cause damage to the aneurysm wall and cause bleeding.

[0100] 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 11 or the second end 12. The shape of the first end 11 is specifically described as follows: Alternatively, if Fig.10 As shown, in the process of forming the first end 11 by 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 is set at the connection between the bundle of braided wires 10 and the main part 14 of the plug body 1, or a developing spring is set to constrain the point, so as to prevent the bundle of braided wires 10 from being untied due to the braiding elastic force of the plug body 1. Then, the bundle of braided wires 10 is set into a spiral shape, and the spiral bundle of braided wires 10 can be regarded as the first end 11, and the end of the first end 11 away from the plug body 1 is connected to the distal soft spring 2.

[0101] Alternatively, if Fig.11As shown, in the process of forming the first end 11 by 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 is set at the connection between the bundle of braided wires 10 and the main part 14 of the plug body 1, or a developing spring is set to constrain the point, so as to prevent the bundle of braided wires 10 from being untied due to the braiding elastic force of the plug 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 first end 11, and the diameter of the end of the first end 11 close to the distal end is smaller than the end of the first end 11 close to the plug body 1, and the end of the first end 11 with a smaller diameter is connected to the distal soft spring 2.

[0102] You can choose any one of the two optional technical solutions mentioned above.

[0103] The shape of the second end 12 is as follows: Alternatively, if Fig.10 As shown, in the process of forming the second end 12 with multiple braided wires 10, multiple braided wires 10 are braided into a bundle of braided wires 10, and a fixed point is set at the connection between the bundle of braided wires 10 and the main part 14 of the plug body 1, or a developing spring is set to constrain the point, so as to prevent the bundle of braided wires 10 from being untied due to the braiding elastic force of the plug body 1. Then, the bundle of braided wires 10 is set into a spiral shape, and the spiral bundle of braided wires 10 can be regarded as the second end 12, and the end of the second end 12 away from the plug body 1 is connected to the developing end 3.

[0104] Alternatively, if Fig.11 As shown, in the process of forming the second end 12 by multiple braided wires 10, multiple braided wires 10 are braided into a bundle of braided wires 10, and a fixed point is set at the connection between the bundle of braided wires 10 and the main part 14 of the plug body 1, or a developing spring is set to constrain the point, so as to prevent the bundle of braided wires 10 from being untied due to the braiding elastic force of the plug 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 12, and the diameter of the end of the second end 12 close to the proximal end is smaller than the end of the second end 12 close to the plug body 1, and the end of the second end 12 with a smaller diameter is connected to the developing end 3.

[0105] You can choose any one of the two optional technical solutions mentioned above.

[0106] Eighth embodiment The inventors have found that the mesh-tube-shaped braided spring coil may be squeezed inside an aneurysm, causing the mesh-tube structure to be flattened and forming a sharp bending angle at the flattened portion. Such a sharp bending angle may penetrate the aneurysm wall and cause a risk of bleeding.

[0107] In view of this, the eighth embodiment is a further improvement based on any one of the first to seventh embodiments, and the main improvement lies in the segmented design of the plug body 1. The plug body 1 includes a plurality of plug sub-segments 17, and adjacent plug sub-segments 17 are connected by connectors, as follows: Alternatively, if Fig.12 As shown, the connecting member may be a connecting spring 41, and the connecting spring 41 may be a developing spring. Among the multiple embolization sub-segments 17, two adjacent embolization sub-segments 17 are connected by the connecting spring 41. Specifically, the structure of the embolization sub-segment 17 is the same as that of the embolization body 1, one end of the connecting spring 41 is connected to one end of one 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, the first protection portion 13 and the second protection portion 15 may be respectively provided at both ends of the embolization sub-segment, which can further prevent the two ends of the embolization sub-segment from causing damage to the aneurysm wall, and can also improve the embolization rate of the aneurysm.

[0108] Alternatively, if Fig.13 As 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 the material of the braided wire 10. Among the multiple embolic sub-segments 17, multiple connecting wires 42 are arranged between two adjacent embolic sub-segments 17. Specifically, one end of the multiple connecting wires 42 is connected to one end of an embolic sub-segment 17, and the other end of the multiple connecting wires 42 is connected to one end of another embolic sub-segment 17, and the multiple connecting wires 42 are evenly arranged around the axis of the embolic body 1. Of course, in some embodiments, the first protection portion 13 and the second protection portion 15 can also be respectively provided at both ends of the embolic sub-segment, which can further prevent the two ends of the embolic sub-segment from causing damage to the aneurysm wall, and can also increase the embolization rate of the aneurysm.

[0109] You can choose any one of the two optional technical solutions mentioned above.

[0110] Compared with the prior art, the braided spring coil disclosed in this embodiment shortens the length of the embolic sub-segments by making the embolic body 1 into a segmented design of multiple embolic sub-segments, reduces the risk of the embolic sub-segments being squeezed and deformed and generating sharp bending angles, and uses connectors to connect the embolic sub-segments, thereby increasing the softness of the braided spring coil and further reducing the risk of the embolic body 1 damaging the aneurysm wall and causing bleeding. Of course, multiple crack-stopping openings 16 are provided on the embolic sub-segments to further prevent the embolic sub-segments from damaging the aneurysm.

[0111] Ninth embodiment The ninth embodiment is a further improvement based on the eighth embodiment. The main improvement is that the braided spring coil further includes fiber hair 43. The arrangement of the fiber hair 43 is as follows: Optionally, not shown in the figures, a plurality of fiber hairs 43 are respectively arranged on each connecting spring 41 , and such an arrangement can increase the embolization rate of the braided spring coil.

[0112] Alternatively, if Fig.14 As shown, the braided spring coil further includes a plurality of groups of fiber hairs 43, which are sequentially arranged along the length direction of the embolic body 1. A plurality of fiber hairs 43 in each group of fiber hairs 43 are respectively arranged on each connecting wire 42, and in each group of fiber hairs 43, a plurality of fiber hairs 43 are evenly arranged around the axis of the embolic body 1, and such an arrangement can increase the embolic rate of the braided spring coil.

[0113] Alternatively, if Fig.15 As shown, the braided spring coil also includes a plurality of fiber hairs 43, which are respectively arranged on each connecting wire 42, and the plurality of fiber hairs 43 are arranged in a spiral shape around the axis of the embolization body 1. Such an arrangement can increase the embolization rate of the braided spring coil.

[0114] Tenth embodiment The present invention also provides a delivery system, which comprises the braided spring coil of any one of the first to ninth embodiments. Figure 2 As shown, the developing end 3 of the braided spring coil is connected to one end of the pushing wire, and the braided spring coil is released in the aneurysm cavity by electrolytic release or mechanical release.

[0115] Finally, it should be noted that those skilled in the art can understand that in order to enable readers to better understand the present invention, the embodiments of the present invention provide many technical details. However, even without these technical details and various changes and modifications based on the above-mentioned embodiments, the technical solutions claimed for protection by the claims of the present invention can be basically achieved. Therefore, in practical applications, various changes can be made to the above-mentioned embodiments in form and detail 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 portion, which is covered at the first end; the diameter of the first protection portion is the same as the diameter of the plug body, or the diameter of one end of the first protection portion is larger than the diameter of the other end, and the diameter of the end of the first protection portion with a smaller diameter is the same as the diameter of the plug body; and / or, The second protection part is covered at the second end; the diameter of the second protection part is the same as the diameter of the plug body, or the diameter of one end of the second protection part is larger than the diameter 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 plug body.

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; the braiding density of the first protection portion is greater than the braiding density of the first end portion; 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 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: The plug body is provided with a first protection portion covering the first end portion; One end of the first protection portion close to the distal end is a closed structure; The braiding density of the first protection portion is greater than the braiding density of the first end portion; 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 with a smaller diameter of the first protection part is the same as the diameter of the plug body.

15. The braided spring coil according to any one of claims 11 to 14, characterized in that: The plug body is provided with a second protection portion covering the second end portion; 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; The diameter of the second protection part is the same as the diameter of the plug body, or the diameter of one end of the second protection part is larger than the diameter 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 plug body.

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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