Intraluminal device

Abstract

The application provides an intraluminal device. The medical instrument technical field comprises: a main body member for radial expansion, comprising a plurality of filaments; a first connecting assembly and a second connecting assembly respectively located at the proximal end and the distal end of the main body member for fixing the axial two ends of the main body member; a first wire harness located on the proximal side of the main body member and connected through the first connecting assembly; a second wire harness located on the distal side of the main body member and connected through the second connecting assembly; at least one of the main body member, the first connecting assembly, the second connecting assembly, the first wire harness and the second wire harness is radiopaque. In the application, the first and second connecting assemblies respectively fix the axial two ends of the radially expandable main body member, so that the intraluminal device is structurally stable; for example, when the intraluminal device of the application is used as an auxiliary device, it can temporarily protect the intraluminal segment, prevent the spring ring from falling out, and avoid blood flow stoppage.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to an intraluminal device. Background Technology

[0002] Currently, for luminal aneurysms, such as hemangiomas, common treatment methods include delivering a spring coil device into the luminal aneurysm sac on the luminal wall to expand it, filling the luminal aneurysm sac as much as possible, or blocking the entrance and exit between the luminal aneurysm and the lumen.

[0003] In addition, auxiliary devices are often used in conjunction with coil devices. Currently, these auxiliary devices mainly include implantable flow diverters and balloons for temporary assistance. However, implantable flow diverters require patients to take antiplatelet drugs long-term and carry the risk of thrombosis; balloons can cause blood flow to stop, leading to related complications. Summary of the Invention

[0004] This application addresses the shortcomings of existing methods by proposing an intraluminal device to solve the technical problems of related technologies that require long-term implantation in the patient or are prone to causing cessation of fluid flow, such as blood, within the lumen.

[0005] This application provides an intraluminal device, including:

[0006] The main component, used for radial expansion, comprises multiple filaments;

[0007] The first connecting component and the second connecting component are located at the proximal end and the distal end of the main body component, respectively, and are used to fix the two ends of the main body component in the axial direction.

[0008] The first wiring harness is located on the proximal side of the main body component and is connected via the first connecting assembly;

[0009] The second wiring harness is located on the distal side of the main body component and is connected via the second connecting assembly;

[0010] At least one of the main component, the first connecting component, the second connecting component, the first wire harness, and the second wire harness is non-transmissive.

[0011] In one possible implementation, the first connection component includes:

[0012] The first connector has an annular through hole;

[0013] The second connector includes an annular side and is at least partially inserted into the through hole of the first connector;

[0014] The first connector is fixedly connected to the second connector.

[0015] In one possible implementation, the main body component includes a woven mesh; the annular proximal end of the main body component is sandwiched between the first connector and the second connector of the first connecting assembly.

[0016] In one possible implementation, the axial length of the first connector is equal to the axial length of the second connector; the axial ends of the first connector are aligned with the axial ends of the second connector.

[0017] In one possible implementation, the second connecting component includes: a connecting member; the annular distal end of the main body component is fixedly connected to the connecting member;

[0018] The device within the cavity further includes: a control component, which is elongated and passes through the second connector along the axial direction, and is fixedly connected to the connector or the second wire harness.

[0019] In one possible implementation, the second connecting component includes: the first connector and the second connector; the annular distal end of the main body component is sandwiched between the first connector and the second connector of the second connecting component;

[0020] The device within the cavity further includes: a control component, which is elongated and passes through the second connector of the first connecting assembly along the axial direction, and is fixedly connected to the second connecting assembly or the second wire harness.

[0021] In one possible implementation, at least one of the first connector and the second connector is non-transmissive.

[0022] In one possible implementation, both the first connector and the second connector are non-transmissive.

[0023] In one possible implementation, the intraluminal device includes at least one of the following:

[0024] The second wire bundle includes at least one non-transparent filament;

[0025] The second wire harness comprises multiple strands of twisted filaments;

[0026] The second wire harness is fixedly connected to the second connection component.

[0027] In one possible implementation, the intraluminal device includes at least one of the following:

[0028] The first wire bundle comprises multiple strands of non-transparent filaments twisted together;

[0029] The first wire harness is fixedly connected to the first connecting component;

[0030] The main component includes multiple non-transparent filaments; the non-transparent filaments include stretched filled tube composite filaments, and the stretched filled tube composite filaments include a core of non-transparent material and a non-transparent outer sheath.

[0031] In one possible implementation, the cross-point density of the woven mesh increases with the radial expansion of the woven mesh.

[0032] In one possible implementation, the intraluminal device includes at least one of the following:

[0033] The cross-point density of the woven mesh in its natural state is not less than 8.4;

[0034] As the diameter of the woven mesh increases from 1.5 mm to 5.0 mm, the cross-point density of the woven mesh increases from 9.2 to 15.

[0035] The beneficial technical effects of the technical solutions provided in this application include:

[0036] In the intraluminal device of this application embodiment, a first connecting component and a second connecting component are provided to fix the axial ends of the radially expandable main component, which can improve the strength and shape retention of the main component, especially the structural stability of the main component after radial expansion. This facilitates the radial expansion of the main component to any target diameter within the design range and its stable maintenance, thereby improving the stability and adaptability of the intraluminal device. When the intraluminal device of this application is used as an auxiliary device for the spring coil device, it is temporarily delivered to the luminal segment where the aneurysm is located while the spring coil device is embolized in the luminal sac (e.g., a hemangioma sac), providing temporary support and protection for the luminal segment. Moreover, it can limit the spring coil device in the sac, preventing the spring coil device from dislodging from the sac into the lumen; at the same time, it can prevent the blood and other fluids in the lumen from stopping flow.

[0037] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0038] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0039] Figure 1 This is a schematic diagram of the structure of an intracavitary device provided in an embodiment of this application;

[0040] Figure 2 This application provides a schematic diagram of a fixing method between the first connector and the second connector of a first connecting assembly in an intracavitary device.

[0041] Figure 3 A schematic diagram illustrating another fixing method between the first connector and the second connector of the first connecting component in an intracavitary device provided in this application embodiment;

[0042] Figure 4 This is a schematic diagram illustrating another fixing method between the first connector and the second connector of the first connecting assembly in an intracavitary device provided in an embodiment of this application;

[0043] Figure 5 A schematic diagram of the main component of an intraluminal device provided in this application after radial expansion of the lumen section at the cyst outlet;

[0044] Figure 6 This is a schematic diagram of the braided mesh of the intraluminal device in Comparative Example 1 after radial expansion of the luminal segment at the outlet of the cyst.

[0045] Figure 7 This is a schematic diagram of the braided mesh of the intraluminal device in Comparative Example 2 after radial expansion of the luminal segment at the outlet of the cyst.

[0046] Explanation of reference numerals in the attached figures:

[0047] 11-Main components; 111-Intersection point;

[0048] 21-First connecting component; 22-Second connecting component; 211-First connector; 212-Second connector;

[0049] 31-First wire harness; 32-Second wire harness;

[0050] 41-Control components;

[0051] 50 - Lumen segment; 60 - Tumor cyst;

[0052] 71 - Woven netting of Comparative Example 1; 81 - Woven netting of Comparative Example 2. Detailed Implementation

[0053] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions of the embodiments of this application.

[0054] Those skilled in the art will understand that, unless specifically stated otherwise, the terms "described" and "the" as used herein may also include plural forms. It should be further understood that the term "comprising" as used in the specification of this application means the presence of the stated features, integers, operations, elements, and / or components, but does not exclude implementations of other features, information, data, operations, elements, components, and / or combinations thereof supported by the art. The term "and / or" as used herein refers to at least one of the items defined by the term; for example, "A and / or B" can be implemented as "A," or as "B," or as "A and B."

[0055] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0056] First, let me introduce and explain some of the terms used in this application: In this application, "proximal" refers to the end of the intraluminal device that is closer to the operator during use, while "distal" refers to the end of the intraluminal device that is farther away from the operator during use.

[0057] The technical solution of this application and how it solves the above-mentioned technical problems are described in detail below with specific embodiments. It should be noted that the following embodiments can be referenced, borrowed, or combined with each other, and the same terms, similar features, and similar implementation steps in different embodiments will not be described again.

[0058] like Figure 1 As shown, this application embodiment provides an intracavitary device, including: a main body component 11, a first connecting component 21, a second connecting component 22, a first wire harness 31, and a second wire harness 32.

[0059] The main component 11 is used for radial expansion and includes multiple filaments.

[0060] The first connecting component 21 and the second connecting component 22 are located at the proximal end and distal end of the main body component 11, respectively, and are used to fix the two axial ends of the main body component 11.

[0061] The first wire harness 31 is located on the proximal side of the main body component 11 and is connected by the first connecting component 21.

[0062] The second wiring harness 32 is located on the far end of the main component 11 and is connected via the second connecting assembly 22.

[0063] At least one of the main component 11, the first connecting component 21, the second connecting component 22, the first wire harness 31, and the second wire harness 32 is non-transmissive.

[0064] In the intracavitary device of this application embodiment, a first connecting component 31 and a second connecting component 32 are provided to fix the axial ends of the radially expandable main body component 11 respectively, which can improve the strength and shape retention of the main body component 11, especially improve the structural stability of the radially expanded main body component 11, making it easy for the main body component 11 to expand radially to any target diameter within the design range and maintain it stably, which is beneficial to improving the stability and adaptability of the intracavitary device.

[0065] The intraluminal device of this application embodiment is a non-long-term implantable stent, which has multiple uses or can be applied to a variety of application scenarios.

[0066] Optionally, it can be used as an auxiliary device for the spring coil device, temporarily delivered to the luminal segment where the luminal aneurysm is located during the period when the spring coil device is embolized in the luminal aneurysm sac (e.g., hemangioma sac), providing temporary support and protection for the luminal segment; moreover, it can limit the spring coil device in the aneurysm sac to prevent the spring coil device from dislodging from the aneurysm sac into the lumen; at the same time, it can prevent the blood and other fluids in the lumen from stopping flow.

[0067] Optionally, the endoluminal device of this application embodiment can serve as a scaffold or device for removing obstacles. The expandable outer diameter of the main body component 11 allows the operator to manipulate the radial force of expansion to achieve the designed expansion outer diameter, so as to penetrate and retain obstacles, such as clots or emboli in blood vessels, and then deliver the endoluminal device that holds or clamps the obstacle to the patient's body.

[0068] Optionally, in the embodiments of this application, the radially expandable main body component 11 may include a mesh, a mesh body, a mesh structure, a spiral winding, and a woven mesh, etc.

[0069] The radially expandable main body component 11 includes at least one radiopaque filament. Optionally, the main body component 11 includes multiple radiopaque filaments; the radiopaque filaments include stretched-filled tube composite filaments, which include a core of radiopaque material and a non-radiopaque outer sheath.

[0070] Optionally, in the embodiments of this application, the radiopaque (i.e., radiolucent) material includes materials such as platinum, gold, tantalum, barium, iodine, bismuth, etc., or alloy materials containing any of the above metals. Optionally, the radiopaque material includes platinum-tungsten alloy, platinum-iridium alloy, or tantalum alloy, etc.

[0071] Optionally, in the embodiments of this application, the non-transparent material includes nickel, titanium, nickel-titanium alloy, or stainless steel, etc.

[0072] Optionally, the non-transmissive material is a developing material; the non-transmissive material is a non-developable material.

[0073] Optionally, the radiopaque filaments may be in the form of DFT (Drawn Filled Tube) composite filaments, which may include a core of a radiopaque material such as platinum, gold, or tantalum, and an outer sheath of a non-radiopaque material such as nitinol. The core of the DFT filament provides radiopaqueness, while the outer sheath provides strength, flexibility, elasticity, and other desired properties. Optionally, the radially expandable body member 11 comprises multiple platinum-core nitinol filaments.

[0074] Since direct laser welding is difficult and the fixing strength is low when the outer sheath of the DFT filament is made of nickel-titanium alloy, this application provides an optional implementation method for fixing the DFT filament, such as... Figure 2-4 As shown, the first connection component 21 in this embodiment includes: a first connector 211 and a second connector 212.

[0075] The first connector 211 has an annular through hole;

[0076] The second connector 212 includes an annular side and is at least partially inserted into the through hole of the first connector 212;

[0077] The first connector 211 is fixedly connected to the second connector 212.

[0078] In this embodiment, the first connector 211 and the second connector 212 are used to clamp the axial proximal end of the main body component 11. There is no need to perform laser welding, soldering or bonding on the proximal end of the main body component 11. The axial proximal end of the main body component 11 is indirectly clamped and fixed by the fixed connection between the first connector 211 and the second connector 212, which can improve the stability and reliability of the radially expandable main body component 11.

[0079] Optionally, such as Figure 2-4 As shown in the embodiment of this application, the main component 11 includes a woven mesh; the annular proximal end of the main component 11 is sandwiched between the first connector 211 and the second connector 212.

[0080] Optionally, such as Figure 2 As shown, the second connector 212 can be partially inserted into the through hole of the first connector 211. Specifically, along the axial direction, the first connector 211 and the second connector 212 are offset from each other, and the proximal end of the main body member 11 extends into the annular through hole of the first connector 211. The overlapping portions of the first connector 211 and the second connector 212 are then fixedly connected together by means of adhesive or soldering.

[0081] In this connection method, adhesive or solder can cover one end face of the second connector 212 and the side exposed on the first connector 211, resulting in a larger contact area and a higher degree of connection stability, which is beneficial to enhancing the stability of the main component 11 and the entire internal device of the cavity.

[0082] Optionally, such as Figure 3 As shown, the axial length of the first connector 211 is equal to the axial length of the second connector 212; the two ends of the first connector 211 are aligned with the two ends of the second connector 212. Specifically, along the axial direction, the first connector 211 and the second connector 212 are aligned, and the proximal end of the main body member 11 extends into the annular through hole of the first connector 211. The overlapping portions of the first connector 211 and the second connector 212 are then fixedly connected together by means of adhesive, soldering, or laser welding.

[0083] This connection method, where either end of the first connector 211 and the second connector 212 are aligned axially to form a uniform end face, facilitates the installation of other components, reduces manufacturing difficulty, increases yield and production efficiency, and helps reduce costs. Furthermore, it increases the radial alignment area of ​​the first connector 211 and the second connector 212, and increases the area where the first connector 211 and the second connector 212 clamp the main component 11, thus improving the overall stability of the main component 11 and the device within the cavity.

[0084] Optionally, such as Figure 4 As shown, the first connector 211 and the second connector 212 are axially aligned, and the end of the main body member 11 is inserted into the annular through hole of the first connector 211. The corresponding parts of the first connector 211 and the second connector 212 overlap each other; then, the first connector 211 and the second connector 212 are fixed together by applying a radial gripping force.

[0085] This connection method eliminates the need for adhesives or soldering, simplifying the materials required. Furthermore, it prevents adhesives or soldering from dissolving in blood or other fluids when the device is inside the patient's body, thus maximizing the safety of the device while ensuring its stability.

[0086] Optionally, in this embodiment, the second connecting component 22 includes a connecting member; the annular distal end of the main component 11 is fixedly connected to the connecting member. The intracavitary device further includes a control component 41.

[0087] The control component 41 is elongated and passes through the second connector 212 of the first connecting assembly 21 along the axial direction, and is fixedly connected to the connecting component or the second wire harness 32.

[0088] Specifically, in this embodiment, the proximal end of the main body component 11 is clamped and fixed between the first connector 211 and the second connector 212 of the first connecting assembly 21 in the radial direction; the control component 41 can pass through the space enclosed by the inner wall of the second connector 212. It can be seen that there is a gap or distance between the main body component 11 and the control component 41 in the radial direction, which is equivalent to separating the control component 41 and the main body component 11 in the radial direction. This can greatly reduce the probability of friction between the control component 41 and the main body component 11 during use and enhance the control performance of the control component 41.

[0089] Optionally, the annular distal end of the main component 11 is soldered to the connecting component. Optionally, the distal end of the control component 41, the connecting component, and the second wiring harness 32 are soldered. Optionally, the connecting component is a disc-shaped component.

[0090] Optionally, the control component 41 may include a traction line.

[0091] Optionally, the second connecting component 22 includes: a first connector 211 and a second connector 212; the annular distal end of the main body component 11 is sandwiched between the first connector 211 and the second connector 212 of the second connecting component 22.

[0092] The intracavitary device in this embodiment further includes a control member 41. The control member 41 is elongated and passes through the second connector 212 of the first connecting assembly 21 axially, and is fixedly connected to the second connecting assembly 22 or the second wiring harness 32.

[0093] Optionally, in the embodiments of this application, the specific structure, function and connection method of the first connector 211 and the second connector 212 of the second connecting component 22 are the same as or similar to the first connector 211 and the second connector 212 of the first connecting component 21, and will not be described again.

[0094] Optionally, the first connector 211 includes a first annular member; the second connector 212 includes a second annular member, wherein the inner diameter of the first annular member is larger than the outer diameter of the second annular member.

[0095] The following table 1 illustrates an example of the dimensional relationship between the first ring component, the second ring component, and the traction line.

[0096]

[0097] Table 1

[0098] In Table 1 above, the first ring is a large marking ring with an outer diameter of 0.48 mm and an inner diameter of 0.43 mm; the second ring is a small marking ring with an outer diameter of 0.27 mm and an inner diameter of 0.17 mm; the traction line is solid, and its outer diameter is 0.15 mm.

[0099] Optionally, in the embodiments of this application, at least one of the first connector 211 and the second connector 212 is non-transparent.

[0100] Specifically, the first connector 211 is transmissive and the second connector 212 is not transmissive; or, the first connector 211 is not transmissive and the second connector 212 is transmissive; or, both the first connector 211 and the second connector 212 are transmissive. The combination of transmissive (developable) properties of the first connector 211 and the second connector 212 can be selected according to actual needs to adapt to different requirements or application scenarios.

[0101] Optionally, in the embodiments of this application, both the first connector 211 and the second connector 212 are radiopaque, which can enhance the radiopaque (i.e., imaging) performance of the entire device within the cavity.

[0102] Optionally, in this embodiment of the application, the material of the first connecting component 21 includes a platinum-iridium alloy, and the material of the second connecting component 22 includes a platinum-iridium alloy.

[0103] Optionally, in this embodiment, the second wire harness 32 includes at least one non-transparent filament. For example, the second wire harness 32 includes multiple platinum-tungsten alloy filaments.

[0104] Optionally, in this embodiment, the second wire harness 32 includes multiple stranded filaments. For example, the second wire harness 32 includes a platinum-tungsten alloy filament stranded together to form a platinum-tungsten spring. The distal tip of the intraluminal device in this embodiment is made of a platinum-tungsten spring, which increases the visibility of radiation and provides more sensitive tactile feedback.

[0105] Optionally, in this embodiment, the second wire harness 32 is fixedly connected to the second connecting assembly 22. For example, the second wire harness 32 is welded, bonded, or laser-welded to the second connecting assembly 22; or, one end of multiple thin wires in the second wire harness 32 is not twisted together, but distributed in a ring, and clamped between the first connector 211 and the second connector 212 of the second connecting assembly 22.

[0106] Optionally, in this embodiment, the first wire harness 31 includes multiple stranded non-transparent filaments. Optionally, in this embodiment, the material of the non-transparent filaments includes nickel, titanium, nickel-titanium alloy, or stainless steel. For example, the first wire harness 31 includes multiple stranded stainless steel filaments.

[0107] Optionally, in this embodiment, the first wire harness 31 is fixedly connected to the first connecting assembly 21. For example, the first wire harness 31 is welded, bonded, or laser-welded to the first connecting assembly 21; or, one end of multiple thin wires in the first wire harness 31 is not twisted together, but distributed in a ring and held between the first connector 211 and the second connector 212 of the first connecting assembly 21.

[0108] When the first connecting component 21, the main component 11, the second connecting component 22, and the second wire harness 32 in the intracavitary device of this application embodiment are all made of radiopaque materials, the radiopaque (i.e., radiopaque) performance of the intracavitary device can be maximized.

[0109] Optionally, the first wire harness 31 located at the distal end of the push rod is composed of multiple strands of springs, such as 12 strands of springs formed by twisting 12 stainless steel wires together. This balances the pushing performance with the passage performance through tortuous lumens (such as blood vessels), and is of moderate softness and hardness, making it easy for doctors and other operators to operate.

[0110] Optionally, in this embodiment of the application, the radially expandable main body component 11 includes a woven mesh, the density of the cross points of the woven mesh increasing as the woven mesh expands radially.

[0111] Optionally, such as Figure 5 As shown, the radially expandable main body component 11 comprises multiple filaments, which are divided into multiple filament groups. Each filament group contains at least one filament, and each filament group is twisted into a strand of composite yarn. In the woven mesh, any two strands of composite yarn intersect to form a crossing point 111. The crossing point density (PPI) is the number of crossing points 111 per inch (or per 25.4 mm) of axial length along the radially expandable main body component 11.

[0112] The intraluminal device in this embodiment can expand radially after the main component 11 is released. The density of the point intersections (PPI) of the braided mesh of the main component 11 can be adjusted by pulling the traction line. As the PPI increases, the axial dimension of the braided mesh decreases, but the circumferential dimension increases. Therefore, the area of ​​each cell (mesh) in the braided mesh remains essentially unchanged. The relationship between PPI and diameter is shown in Table 2 below. Since the filaments constituting the braided mesh are primarily metallic, a higher PPI results in a higher metal coverage, providing sufficient radial support for the spring coil device located within the cyst.

[0113] Optionally, the PPI increase in the middle part of the braided mesh is much greater than that at both ends, which makes the braided mesh fit the aneurysm neck better while reducing the impact on blood flow.

[0114] The following table 2 serves as an example to illustrate the effect comparison of different PPIs and different PPI change rates between the braided mesh of the lumen device of this application and the braided mesh of the lumen devices of Comparative Examples 1-2.

[0115]

[0116] Table 2

[0117] Table 2 above provides examples of the PPI and Cell area of ​​the braided mesh for three types of intraluminal devices. Figure 5 This is a schematic diagram of the main component 11 of the intraluminal device in one possible embodiment of this application after radial expansion of the lumen section 50 at the outlet of the cyst 60. (See diagram below.) Figure 5 As shown, PPI-1 and Cell-1 represent the PPI value and corresponding cell area of ​​the braided mesh of the main component 11 of the device inside the lumen in this embodiment of the application, respectively.

[0118] Figure 6 This is a schematic diagram of the braided mesh 71 of the intraluminal device in Comparative Example 1 after radial expansion of the luminal segment 50 at the outlet of the cyst 60. (See diagram below.) Figure 6 As shown, PPI-2 and Cell-2 represent the PPI value and corresponding cell area of ​​the woven mesh in Comparative Example 1, respectively.

[0119] Figure 7 This is a schematic diagram of the braided mesh 81 of the intraluminal device in Comparative Example 2 after radial expansion of the luminal segment 50 at the outlet of the cyst 60, as shown. Figure 7 As shown, PPI-3 and Cell-3 represent the PPI value and corresponding cell area of ​​the woven mesh in Comparative Example 2, respectively.

[0120] For example, for the same tumor cyst 60 (with a constant opening size), with equal degrees of expansion of the braided mesh (i.e., equal diameter), from Figure 5 One embodiment of this application describes a radially expanded woven mesh. Figure 6 Comparative scale 1 woven mesh 71, all the way to Figure 7 In the woven mesh 81 of the comparative example 2, the density of the intersection points 11 decreases, while the area of ​​the mesh cells increases.

[0121] The PPI (Proportional Point Intensity) of the braided mesh, which is the main component 11 in the endovascular device, determines the performance of the endovascular device in its natural, unloaded state. The higher the PPI of the braided mesh in its natural state, the higher the PPI will be when the braided mesh expands in the blood vessel. In this embodiment, the cross-point density (PPI) of the braided mesh in the endovascular device is not less than 8.4 in its natural state, which can provide more stable support for the coil device and effectively prevent the coil device from dislodging from aneurysms or other sacs.

[0122] Optionally, such as Figure 5 As shown, in the intraluminal device of this application embodiment, the braided mesh of the intraluminal device, which serves as the main component 11, is constructed as a luminal section 50 disposed at the outlet of the cyst 60, for abutting against the spring coil device in the cyst 60. With the radial expansion of the braided mesh of the intraluminal device, the crosspoint density PPI-1 of the braided mesh in one embodiment of this application increases rapidly. For example, as the diameter of the braided mesh expands from 1.5 mm to 5.0 mm, the PPI-1 value rapidly increases from 9.2 to 15, an increase of approximately 63%. The axial dimension of the mesh cell-1 of the braided mesh in one embodiment of this application decreases rapidly, causing the area ratio of the metal crosspoints 111 and metal filaments on the circumferential surface of the braided mesh to increase rapidly with radial expansion, i.e., the metal distribution density on the circumferential surface of the braided mesh increases rapidly. Moreover, the PPI-1 in its natural state before expansion is 9.2, and after expansion, it can reach 15, both exceeding the PPI of the braided mesh after expansion in Comparative Examples 1-2 described below. Therefore, the intraluminal device of this application can provide more stable support for the spring coil device.

[0123] like Figure 6 As shown, as the braided mesh 71 of the in-lumen device in Comparative Example 1 expands radially, the crosspoint density PPI-2 of the braided mesh 71 in Comparative Example 1 increases slowly. For example, as the diameter of the braided mesh 71 expands from 1.5 mm to 5.0 mm, the PPI-2 slowly increases from 6.0 to 8.4, an increase of approximately 40%. The axial dimension of the mesh cell-2 of the braided mesh 71 changes very little. The area ratio of the metal crosspoints 111 and the metal filaments on the circumference of the braided mesh is insufficient, and the metal distribution density on the circumference of the braided mesh 71 is insufficient. The support force for the spring coil device within the cyst 60 is small, much smaller than the support force level of the braided mesh for the spring coil device in the in-lumen device of this application embodiment, which can easily lead to a decrease in the embolization effect of the spring coil device.

[0124] like Figure 7 As shown, as the braided mesh 81 of the device inside the lumen of Comparative Example 2 expands radially, the crosspoint density PPI-3 of the braided mesh 72 of Comparative Example 2 increases slowly. For example, as the diameter of the braided mesh 81 expands from 1.5 mm to 5.0 mm, the PPI-3 slowly increases from 4.0 to 5.6, which is about 40%. The axial dimension of the mesh cell-3 of the braided mesh 81 also changes very little. Moreover, it is easy to see that the PPI-3 of the radially expanded braided mesh 81 is smaller than that of PPI-2, only 5.6. The supporting force on the spring coil device inside the cyst 60 is smaller than that of Comparative Example 1, and it basically loses its supporting effect on the spring coil device.

[0125] In this embodiment of the application, when the auxiliary spring coil device embolizes the cyst 60, the main component 11 of the intraluminal device is released and expands radially, which can produce a straightening effect or tendency on severely tortuous blood vessels and other lumens, thereby appropriately reducing the curvature of severely tortuous blood vessels and other lumens (i.e., appropriately increasing the radius of curvature), and providing a favorable channel for the delivery and positioning of the spring coil device.

[0126] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0127] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0128] The above description is only a partial implementation of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application, without departing from the technical concept of this application, also fall within the protection scope of the embodiments of this application.

Claims

1. An intracavitary device, characterized in that, include: The main component, used for radial expansion, comprises multiple filaments; The first connecting component and the second connecting component are located at the proximal end and the distal end of the main body component, respectively, and are used to fix the two ends of the main body component in the axial direction. The first wiring harness is located on the proximal side of the main body component and is connected via the first connecting assembly; The second wiring harness is located on the distal side of the main body component and is connected via the second connecting assembly; At least one of the main component, the first connecting component, the second connecting component, the first wire harness, and the second wire harness is non-transparent. The first connecting component includes: a first connector having an annular through hole; and a second connector including an annular side surface, at least partially inserted into the through hole of the first connector. The main component includes a woven mesh; the annular proximal end of the main component is sandwiched between the first connector and the second connector of the first connecting assembly; The first connector and the second connector are fixedly connected by adhesive, soldering, laser welding or by applying a radial gripping force.

2. The intracavitary device according to claim 1, characterized in that, The axial length of the first connector is equal to the axial length of the second connector; the two axial ends of the first connector are aligned with the two axial ends of the second connector.

3. The intraluminal device according to claim 1, characterized in that, The second connecting component includes: a connecting member; the annular distal end of the main body component is fixedly connected to the connecting member; The device within the cavity further includes: a control component, which is elongated and passes through the second connector along the axial direction, and is fixedly connected to the connector or the second wire harness.

4. The intraluminal device according to claim 1, characterized in that, The second connecting assembly includes: the first connector and the second connector; the annular distal end of the main body component is sandwiched between the first connector and the second connector of the second connecting assembly; The device within the cavity further includes: a control component, which is elongated and passes through the second connector of the first connecting assembly along the axial direction, and is fixedly connected to the second connecting assembly or the second wire harness.

5. The intraluminal device according to claim 1, characterized in that, At least one of the first connector and the second connector is non-transparent.

6. The intraluminal device according to claim 5, characterized in that, Both the first connector and the second connector are non-transparent.

7. The intraluminal device according to claim 1, characterized in that, Includes at least one of the following: The second wire bundle includes at least one non-transparent filament; The second wire harness comprises multiple strands of twisted filaments; The second wire harness is fixedly connected to the second connection component.

8. The intraluminal device according to claim 1, characterized in that, Includes at least one of the following: The first wire bundle comprises multiple strands of non-transparent filaments twisted together; The first wire harness is fixedly connected to the first connecting component; The main component includes multiple non-transparent filaments; the non-transparent filaments include stretched filled tube composite filaments, and the stretched filled tube composite filaments include a core of non-transparent material and a non-transparent outer sheath.

9. The intraluminal device according to claim 1, characterized in that, The cross-point density of the woven mesh increases as the woven mesh expands radially.

10. The intraluminal device according to claim 9, characterized in that, Includes at least one of the following: The cross-point density of the woven mesh in its natural state is not less than 8.4; As the diameter of the woven mesh increases from 1.5 mm to 5.0 mm, the cross-point density of the woven mesh increases from 9.2 to 15.

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