Conveying steel cable for plugging device conveying device and plugging device conveying device

Abstract

The utility model provides a conveying steel cable for an occluder conveying device and the occluder conveying device. The conveying steel cable comprises a bolt head part used for being connected with a plugging device; the first conveying part comprises at least one strand of first metal wires, the first metal wires form a spiral structure, and the bolt head part is connected with the end part of the first conveying part; the second conveying part is connected with the end, away from the bolt head part, of the first conveying part, the second conveying part comprises at least one second metal wire, the second metal wire forms a spiral structure, and the wire diameter of the first metal wire is smaller than that of the second metal wire, so that the flexibility of the first conveying part is larger than that of the second conveying part. The utility model solves the problem that the form and the position of the plugging device cannot be fixed when the plugging device is released from the conveying steel cable in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to a conveying steel cable and a conveying device for an occluder delivery device. Background Technology

[0002] To better support the actual use of the sealing device, the delivery system must meet the different requirements of various application scenarios. For example, when the sealing device is retracted into the loader from the outside, the internal cable core must exhibit high rigidity so that the operator can apply tension evenly and smoothly retract it into the sheath. When the sealing device is pushed towards the far end of the delivery sheath after being retracted into the loader, the internal cable core must exhibit high rigidity so that the retracted sealing device can be pushed more smoothly into the delivery sheath. After the sealing device is fully released, the internal cable core connected to the sealing device must exhibit flexible characteristics to eliminate connection stress and ensure that the sealing device maintains a good sealing state before and after the internal cable core is released, thereby improving the effectiveness of the sealing device.

[0003] Existing conveyor cable connection sealing devices, after being pushed to the designated location and released, suffer from cable tension that prevents the sealing device from maintaining its final shape and position. After removing the cable, the sealing device is prone to deformation and displacement, and sometimes even the cable bolt head gets caught on the product. Current conveyor cables are primarily made of 304 stainless steel wire wound unidirectionally, making it impossible to adjust their stiffness. Existing conveyor cables with adjustable or removable cores primarily consist of a single strand of metal wire wound unidirectionally, which suffers from poor torsional force transmission, easy longitudinal stretching and elongation, easy deformation at large bending angles, and the need for thicker wires, resulting in limited cable flexibility. Utility Model Content

[0004] The main objective of this invention is to provide a conveying steel cable and a conveying device for a plugging device, so as to solve the problem that the shape and position of the plugging device cannot be fixed when the conveying steel cable is released from the plugging device in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a conveying steel cable for a occluder conveying device is provided, comprising: a plug head for connection to an occluder; a first conveying section, the first conveying section comprising at least one first metal wire forming a spiral structure, the plug head being connected to an end of the first conveying section; and a second conveying section, the second conveying section being connected to an end of the first conveying section away from the plug head, the second conveying section comprising at least one second metal wire forming a spiral structure, the diameter of the first metal wire being smaller than the diameter of the second metal wire, so that the flexibility of the first conveying section is greater than the flexibility of the second conveying section.

[0006] Furthermore, the length of the first conveying section is 10-15cm.

[0007] Furthermore, the diameter of the first metal wire and / or the second metal wire is 0.1-1.0 mm.

[0008] Furthermore, the first metal wire and / or the second metal wire are multi-stranded, and the first conveying part and / or the second conveying part have an inner and outer multi-layered spiral structure, with the spiral directions of adjacent two layers of spiral structure being opposite to each other along the radial direction of the spiral structure.

[0009] Furthermore, the spiral structure has 2-6 layers.

[0010] Furthermore, the first metal wire and / or the second metal wire consists of 2-10 strands.

[0011] Furthermore, the conveying cable also includes a handle for operation, which is connected to the end of the second conveying section away from the first conveying section.

[0012] Furthermore, the handle portion has a mounting hole, and a portion of the second conveying portion passes through the mounting hole and is connected to the handle portion; or the handle portion and the second conveying portion are integrally formed.

[0013] Furthermore, the first conveying section and the second conveying section are integrally formed.

[0014] According to another aspect of the present invention, a plugging device is provided, comprising a delivery sheath, a loader, and the aforementioned delivery cable. The loader is capable of being inserted into the delivery sheath, and the delivery cable is capable of being inserted into the loader and is delivered within the delivery sheath under the drive of the loader.

[0015] By applying the technical solution of this utility model, a structure with two sections, a first conveying section and a second conveying section, is constructed. The diameter of the first metal wire forming the first conveying section is smaller than the diameter of the second metal wire forming the second conveying section. This results in the first conveying section having higher flexibility than the second conveying section, while the second conveying section has higher rigidity than the first conveying section. Due to the better rigidity of the second conveying section, the entire conveying cable can effectively convey the plug. When the plug is in place, after it is fully released, the higher flexibility of the first conveying section allows the stress of the plug to be released and eliminated, ensuring that the plug is in a more natural unfolded state and that the shape and position of the plug are consistent with the effect after the conveying cable is removed. The special winding method of the steel cable gives the delivery steel cable good bending flexibility and good torsional force transmission. It will not deform or elongate significantly when stretched. On the other hand, the first delivery part at the far end has better flexibility, while the remaining second delivery part has moderate flexibility and pushing ability, which is more in line with the needs of clinical use. This ensures the stability and reliability of both delivery and release of the occluder, and ensures that the shape and position of the occluder can be kept fixed when the occluder is released. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of the structure of the transmission steel cable of this utility model is shown;

[0018] Figure 2 It shows Figure 1 A partial structural diagram of the intermediate helical structure;

[0019] Figure 3 A schematic diagram of the structure of the plug delivery device of this utility model is shown;

[0020] Figure 4 A schematic diagram of the delivery sheath is shown;

[0021] Figure 5 A schematic diagram of the loader's structure is shown;

[0022] Figure 6 A schematic diagram of the expander is shown.

[0023] The above figures include the following reference numerals:

[0024] 10. Bolt head; 20. First conveying section; 21. Spiral structure; 30. Second conveying section; 40. Handle section; 50. Conveying sheath; 60. Loader; 70. Expander. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0028] To address the problem that the shape and position of the sealing device cannot be fixed when the conveying steel cable is released from the sealing device in the prior art, this utility model provides a conveying steel cable and a sealing device conveying device for a sealing device conveying device.

[0029] like Figure 1 The cable shown is a conveying cable for a occluder delivery device, comprising a plug head 10 for connection to the occluder, a first delivery section 20, and a second delivery section 30. The first delivery section 20 includes at least one first metal wire forming a spiral structure 21. The plug head 10 is connected to the end of the first delivery section 20. The second delivery section 30 is connected to the end of the first delivery section 20 away from the plug head 10. The second delivery section 30 includes at least one second metal wire forming a spiral structure 21. The diameter of the first metal wire is smaller than the diameter of the second metal wire, so that the flexibility of the first delivery section 20 is greater than that of the second delivery section 30.

[0030] This embodiment features a structure with two sections: a first conveying section 20 and a second conveying section 30. The diameter of the first metal wire forming the first conveying section 20 is smaller than the diameter of the second metal wire forming the second conveying section. This results in the first conveying section 20 having higher flexibility than the second conveying section 30, while the second conveying section 30 has higher rigidity than the first conveying section 20. Due to the better rigidity of the second conveying section 30, the entire conveying cable can effectively convey the plug. When the plug is in place and fully released, the higher flexibility of the first conveying section 20 allows the stress on the plug to be released and eliminated, ensuring that the plug is in a more natural unfolded state and that the shape and position of the plug are consistent with the effect after the conveying cable is removed. The special winding method of the steel cable gives the delivery steel cable good bending flexibility and good torsional force transmission. It will not deform or elongate significantly when stretched. On the other hand, the first delivery part 20 at the far end has better flexibility, while the remaining second delivery part 30 has moderate flexibility and pushing ability, which is more in line with the needs of clinical use. This ensures the stability and reliability of the two operations of delivery and release of the occluder, and ensures that the shape and position of the occluder can be kept fixed when the occluder is released.

[0031] In this embodiment, the length of the first conveying section 20 is preferably 10-15cm. This length better meets the needs of human use and ensures the stress release effect of the occluder. The length of the second conveying section 30 can be set as needed; it can be relatively long, just enough to deliver the occluder to the designated position. Of course, the specific length of the first conveying section 20 can also be adjusted as needed.

[0032] In this embodiment, the diameter of the first metal wire and / or the second metal wire is preferably 0.1-1.0 mm. This ensures both the overall structural performance requirements of the conveying cable and the flexibility and rigidity requirements of the first conveying section 20 and the second conveying section 30, respectively.

[0033] Since both the first conveying section 20 and the second conveying section 30 in this embodiment are formed by winding metal wire, they can be integrally molded together, thus making the conveying steel cable a single unit and ensuring its structural reliability. Alternatively, the first conveying section 20 and the second conveying section 30 can be separately configured and then connected together via components or winding. In this embodiment, steel wire is used, but other materials can also be used.

[0034] like Figure 2 As shown, the first and / or second metal wires are multi-stranded, and the first conveying section 20 and / or the second conveying section 30 have an inner and outer multi-layered spiral structure 21. In this embodiment, the structural forms of the first conveying section 20 and the second conveying section 30 are basically the same, with the main differences being in parameters such as wire diameter and overall diameter. The spiral structure 21 allows the conveying cable to form a hollow spring tube structure, which, when twisted, adjusts the fit between the plug head 10 and the plug, thus achieving connection and release with the plug.

[0035] Preferably, along the radial direction of the spiral structure 21, the spiral directions of adjacent layers of the spiral structure 21 in the first conveying section 20 or the second conveying section 30 are opposite to each other. In this embodiment, both the first conveying section 20 and the second conveying section 30 adopt this arrangement. This arrangement of adjacent layers with opposite spiral directions ensures excellent transmission of torsional force in the conveying cable. When rotating the conveying cable, the torsional force transmission is essentially without delay and is timely. When releasing the plug, rotation around the axis does not cause deformation of the entire cross-sectional shape of the two conveying sections, resulting in uniform stress distribution along the length direction. This greatly reduces elastic deformation loss and rotational inertia loss, making bending and twisting less likely during cable rotation. The torsional force transmission synchronization is excellent, allowing the torsional force at the near end to be transmitted to the far end in a timely manner, effectively preventing rapid rebound of the cable or handle during release and ensuring reliable operation.

[0036] It should be noted that the spiral direction of the spiral structure 21 mentioned above refers to the spiral direction of all spiral structures 21 judged according to a unified standard, such as judging it according to the direction of the steel cable from the near end to the far end, or from the far end to the near end. As long as the judgment standard is unified, the spiral direction of the spiral structure 21 can be guaranteed to be opposite.

[0037] Preferably, the spiral structure 21 has 2-6 layers. Of course, the specific number of layers can be adjusted as needed. In this embodiment, the spiral structure 21 of both the first conveying section 20 and the second conveying section 30 is provided with inner and outer layers.

[0038] Preferably, the first metal wire and / or the second metal wire consists of 2-10 strands. That is, each helical structure 21 can be formed simultaneously by winding 2-10 parallel metal wires, which makes the structure more stable and reliable, and less prone to twisting or other issues.

[0039] like Figure 1 As shown, in this embodiment, the conveying cable also includes a handle 40 for operation, which is connected to the end of the second conveying section 30 away from the first conveying section 20. The handle 40 is provided because the spiral-shaped second conveying section 30 is inconvenient to operate. Therefore, this embodiment provides a handle 40, which is located near the second conveying section 30 and can be in a cylindrical shape that is easy to grip. This allows the operator to hold the handle 40 to perform conveying and rotating operations, thereby realizing the conveying, unfolding, and releasing of the occluder.

[0040] In this embodiment, the handle portion 40 and the second conveying portion 30 are integrally formed. This makes the first conveying portion 20, the second conveying portion 30, and the handle portion 40 a single unit. The bolt head 10 can also be configured in the same way, making the conveying steel a single component and ensuring its stability and reliability during use. Of course, in addition to the integral forming method, a separate configuration can also be used. The bolt head 10 and the first conveying portion 20, and the second conveying portion 30 and the handle portion 40 can both be configured separately. For example, a non-through mounting hole can be provided at the center of the end face of the handle portion 40, and a portion of the second conveying portion 30 away from the first conveying portion 20 can pass through the mounting hole to achieve connection with the handle portion 40.

[0041] In this embodiment, the plug head 10 includes a large-diameter section and a small-diameter section connected sequentially in the axial direction. The end face of the large-diameter section away from the small-diameter section is connected to the first conveying part 20. A thread is provided on the outer circumference of the small-diameter section, so that the plug head 10 can be threadedly engaged with the internal thread of the nut of the plugging device through the external thread of the small-diameter section, thereby realizing the connection between the plug head 10 and the plugging device. At the same time, the plug head 10 can be released from the plugging device by rotating the conveying steel cable.

[0042] like Figures 3 to 6As shown, this embodiment also provides a plugging device delivery device, including a delivery sheath 50, a loader 60 and the aforementioned delivery cable. The loader 60 can be inserted into the delivery sheath 50, and the delivery cable can be inserted into the loader 60 and delivered within the delivery sheath 50 under the drive of the loader 60.

[0043] like Figure 4 As shown, the delivery sheath 50 in this embodiment adopts a three-layer composite structure, wherein the inner layer is made of polytetrafluoroethylene, the middle layer is made of 304 stainless steel wire mesh, and the outer layer is made of nylon elastic foam material Pebax, with added imaging material. An imaging ring is provided at the distal end of the delivery sheath 50. The connector is made of ABS plastic, the marking tube is made of polyurethane (PU), the end cap is made of ABS plastic, the hemostatic valve is made of silicone rubber, the side tube is made of PVC plastic, the three-way switch valve is made of high-density polyethylene (HDPE), and the three-way switch seat is made of polycarbonate (PC).

[0044] like Figure 5 As shown, in this embodiment, the loader 60 tube body is made of high-density polyethylene (HDPE) and is semi-transparent in color; the connector is made of ABS plastic; the marking tube is made of polyurethane (PU); the end cap is made of ABS plastic; the hemostatic valve is made of silicone rubber; the side tube is made of PVC plastic; the three-way switch valve is made of high-density polyethylene (HDPE); and the three-way switch base is made of polycarbonate (PC).

[0045] like Figure 6 As shown, the occluder delivery device of this embodiment also includes an expander 70. The expander 70 can be inserted into the delivery sheath 50 before the loader 60 is inserted into the delivery sheath 50, thereby expanding the delivery sheath 50. After expansion, the expander 70 can be removed and inserted into the loader 60, which contains the occluder and the delivery sheath 50. The main body material of the expander 70 in this embodiment is high-density polyethylene (HDPE), and the joint material is also high-density polyethylene (HDPE).

[0046] In this embodiment, the plug delivery device is used such that the plug head 10 is rotatably connected to the plug's nut, and the plug is retracted into the loader 60 by pulling back the delivery cable. After the loader 60 is connected to the delivery sheath 50, the plug is pushed to the plugging location by pushing the delivery cable. When the plug is fully released, the first delivery section 20 at the distal end of the delivery cable, due to its excellent bending flexibility, eliminates the stress connected to the plug, ensuring the plug is in a more natural unfolded state. Finally, rotating the handle 40 disengages the plug head 10 from the plug, and pulling back the delivery sheath 50 removes it from the entire delivery system, completing the entire operation.

[0047] It should be noted that "multiple" in the above embodiments refers to at least two.

[0048] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0049] 1. This solves the problem that the shape and position of the sealing device cannot be fixed when the steel cable is released from the sealing device in the existing technology;

[0050] 2. The conveying steel cable has good bending flexibility, good effect in transmitting torsional force, and will not deform or elongate significantly when stretched.

[0051] 3. The first delivery section located at the distal end has better flexibility, while the remaining second delivery sections have moderate flexibility and pushability, which better meets the needs of clinical use, ensuring the stability and reliability of both delivery and release of the occluder, and ensuring that the shape and position of the occluder can remain fixed when the occluder is released.

[0052] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0053] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0054] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0055] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A delivery cable for an occluder delivery device, characterized in that, The delivery cable comprises: a plug head (10) for connecting with a closure device; a first delivery part (20) comprising at least one first wire, the first wire forming a helical structure (21), the plug head (10) being connected with an end of the first delivery part (20); a second delivery part (30) connected with an end of the first delivery part (20) away from the plug head (10), the second delivery part (30) comprising at least one second wire, the second wire forming a helical structure (21), a wire diameter of the first wire being smaller than a wire diameter of the second wire, so that a flexibility of the first delivery part (20) is greater than a flexibility of the second delivery part (30).

2. The conveyor cable of claim 1, wherein, The first delivery part (20) has a length of 10-15 cm.

3. The conveyor cable of claim 1, wherein, The first wire and / or the second wire has / have a wire diameter of 0.1-1.0 mm.

4. The conveyor cable of claim 1, wherein, The first wire and / or the second wire is / are multi-stranded, the first delivery part (20) and / or the second delivery part (30) having a plurality of layers of the helical structure (21) arranged in a nested manner, adjacent two layers of the helical structure (21) having opposite directions of rotation along a radial direction of the helical structure (21).

5. The conveyance steel cable of claim 4, wherein, The helical structure (21) has a number of layers of 2-6 layers.

6. The conveyance steel cable of claim 4, wherein, The first wire and / or the second wire is / are 2-10 strands.

7. The conveyance steel cable of any one of claims 1 to 6, wherein, The delivery cable further comprises a handle part (40) for operation, the handle part (40) being connected with an end of the second delivery part (30) away from the first delivery part (20).

8. The delivery cable according to claim 7, wherein the handle part (40) has a mounting hole, a portion of the second delivery part (30) being arranged in the mounting hole and connected with the handle part (40); or the handle part (40) and the second delivery part (30) are integrally formed.

9. The conveyor cable according to any one of claims 1 to 6, characterized in that The first delivery part (20) and the second delivery part (30) are integrally formed.

10. An occluder delivery device, characterized by, The delivery cable comprises a delivery sheath (50), a loader (60) capable of being arranged in the delivery sheath (50), and the delivery cable according to any one of claims 1-9, the delivery cable being capable of being arranged in the loader (60) and being delivered in the delivery sheath (50) under driving of the loader (60).

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