Conveying steel cable and plugging device conveying device

Abstract

The utility model provides a conveying steel cable and a plugging device conveying device. The conveying steel cable comprises a steel cable body and a connecting piece, the steel cable body comprises a first section and a second section which are sequentially connected, the first section is a hollow spring tube formed by winding multiple strands of metal wires, the hollow spring tube is of a multi-layer structure, the spiral directions of every two adjacent layers are opposite, and the second section is a single-layer solid spring tube formed by winding a single strand of metal wires around a cable core. The connecting piece is arranged at the far end of the first section and used for being detachably connected with the plugging device. The plugging device solves the problem that in the prior art, a plugging device cannot maintain a good plugging state after being released.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field, specifically, relate to a kind of conveying steel cable and occluder conveying device. BACKGROUND

[0002] To better cooperate with the actual use of occluder, conveying device needs to meet the different requirements of multiple application scenarios, such as when pulling the occlusion device into the loader outside the body, the conveying cable of the conveying device needs to be stretched as little as possible to allow the operator to better apply tension uniformly and then smoothly retract the delivery sheath; when the occluder in the retracted loader is pushed to the distal end of the delivery sheath, the conveying cable needs to exhibit good thrust transmission performance to allow the occluder in the retracted state to smoothly advance in the delivery sheath; when the conveying cable is detached from the occluder, the conveying cable needs to exhibit good torsional force transmission performance to allow the occluder to be smoothly detached; after the occluder is completely released, the conveying cable connected to the occluder needs to exhibit soft characteristics to eliminate connection stress and ensure that the occluder maintains a good occlusion state before and after release, thereby improving the effectiveness of the occluder use.

[0003] However, after the existing conveying cable connected to the occluder is pushed to the designated site to complete release, the tension of the conveying cable causes the shape and position of the occluder to be unable to be finally fixed, and after the conveying cable is removed, the occluder is prone to deformation and displacement or even the phenomenon of the cable bolt head hanging on the product, which makes the occluder unable to maintain a good occlusion state after being detached, affecting the normal use of the occluder.

[0004] As can be seen from the above, there is a problem in the prior art that the occluder cannot maintain a good occlusion state after being released. SUMMARY

[0005] The main purpose of the utility model is to provide a conveying cable and an occluder conveying device to solve the problem in the prior art that the occluder cannot maintain a good occlusion state after being released.

[0006] To achieve the above-mentioned purpose, according to one aspect of the utility model, a conveying cable is provided, which comprises a cable main body and a connecting piece, the cable main body comprises a first segment and a second segment connected in sequence, the first segment is a hollow spring tube made of multiple metal wires, the hollow spring tube has a multi-layer structure, the spiral directions of adjacent two layers are opposite, the second segment is a single-layer solid spring tube made of a single metal wire around a cable core, the connecting piece is arranged at the distal end of the first segment and used for detachably connecting with the occluder.

[0007] Further, the length ratio between the first segment and the second segment is 3:10 to 1:15.

[0008] Further, the wire diameter of the metal wire of the hollow spring tube is 0.1mm to 1mm; and / or the inner diameter of the hollow spring tube is 0.3mm to 2.8mm; and / or the outer diameter of the hollow spring tube is 0.5mm to 3.0mm.

[0009] Further, the number of strands of the metal wire of the hollow spring tube is 2 to 10; and / or the number of layers of the hollow spring tube is 2 to 6.

[0010] Further, the hollow spring tubes of each layer are sequentially and closely arranged in the length direction without overlapping.

[0011] Further, the cable core is interwoven by multiple strands of metal wires.

[0012] Further, the delivery steel cable further comprises a handle, which is integrally injection molded with the proximal end of the steel cable body or detachably connected.

[0013] According to another aspect of the present application, a delivery device is provided, comprising the above delivery steel cable.

[0014] Further, the delivery device further comprises a delivery sheath and a loader, the loader being connected with the delivery sheath and used for loading the occluder, and the proximal end portion of the delivery steel cable is provided with a first marker, which is used for aligning with the proximal end of the loader when the distal end of the occluder is aligned with the distal end of the delivery sheath.

[0015] Further, the proximal end portion of the delivery steel cable is further provided with a second marker, which is used for aligning with the proximal end of the loader when the occluder is completely pushed out of the delivery sheath.

[0016] The utility model discloses a technical scheme, conveying cable includes cable main part and connecting piece, and cable main part includes the first section and second section connected in proper order, and the first section is the hollow spring pipe of multiple metal filaments winding, and the hollow spring pipe is multilayer structure, and the spiral direction of adjacent two layers is opposite, and the second section is the single layer solid spring pipe of single metal filament winding cable core winding, and connecting piece sets up at the far end of the first section, is used for with the occluder detachably connected, and in this way through setting up the hollow spring pipe and solid spring pipe with specific winding structure respectively to the first section and the second section, the hollow spring pipe has good longitudinal tensile force and thrust transmission performance, and the transmission torsional force effect is good, and obvious deformation elongation does not appear when stretching, makes the cable main part not easy to deform when the larger bending angle, and the overall flexibility is excellent, and then make the connecting stress between the occluder and the cable main part easy to eliminate, guarantee the occluder's occlusion form and position and keep consistent after removing the cable main part, realize the occluder release and can maintain good occlusion state, and the solid spring pipe has proper flexibility and hardness, and is not easy to stretch, and the force transmission is good, convenient to use and operate, make the two sections of cable main part can play respective advantages in the use process, solve the problem that the occluder release and can not maintain good occlusion state in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the present application, serve to explain the present application. In the drawings:

[0018] Figure 1 Fig. 1 shows the structure schematic diagram of conveying cable in one specific embodiment of the utility model;

[0019] Figure 2 Fig. 2 shows the structure schematic diagram of hollow spring pipe in one specific embodiment of the utility model;

[0020] Figure 3 Fig. 3 shows the structure schematic diagram of occluder conveying device in one specific embodiment of the utility model;

[0021] Figure 4 Fig. 4 shows the structure schematic diagram of conveying sheath in one specific embodiment of the utility model;

[0022] Figure 5 Fig. 5 shows the structure schematic diagram of loader in one specific embodiment of the utility model;

[0023] Figure 6 Fig. 6 shows the structure schematic diagram of dilator in one specific embodiment of the utility model.

[0024] Wherein, the above drawing includes the following sign:

[0025] 10 steel cable body; 11 first section; 111 outer layer wire; 112 inner layer wire; 12 second section; 20 connecting piece; 30 handle; 40 delivery sheath; 50 loader; 60 dilator. DETAILED DESCRIPTION

[0026] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0028] In the present application, unless otherwise stated, the orientation words such as "upper, lower, top, bottom" are generally directed to the direction shown in the drawings, or are directed to the vertical, perpendicular or gravity direction of the components themselves. Similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application.

[0029] Obviously, the above-described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0030] In the present application, "proximal end" refers to the end close to the doctor or operator, and "distal end" refers to the end close to the patient.

[0031] In order to solve the problem that the occluder cannot maintain a good occlusion state after being released in the prior art, the present application provides a delivery steel cable and an occluder delivery device. The occluder delivery device described below comprises the delivery steel cable described below.

[0032] As shown in Figure 1 The delivery steel cable comprises a steel cable body 10 and a connecting piece 20. The steel cable body 10 comprises a first section 11 and a second section 12 connected in sequence. The first section 11 is a hollow spring pipe wound by a plurality of metal wires, and the hollow spring pipe has a multi-layer structure. The spiral directions of adjacent two layers are opposite. The second section 12 is a single-layer solid spring pipe wound by a single metal wire around a cable core. The connecting piece 20 is arranged at the distal end of the first section 11, and is used for detachably connecting with the occluder.

[0033] By respectively setting the first section 11 and the second section 12 as the hollow spring tube and the solid spring tube with the specific winding structure, the hollow spring tube has good longitudinal tension and thrust conduction performance, the transmission of the torsional force is good, no obvious deformation elongation occurs during stretching, the steel cable body is not easy to deform at a large bending angle, the overall flexibility is excellent, the connection stress between the occlusion device and the steel cable body is easy to eliminate, the occlusion shape and position of the occlusion device are kept consistent after the steel cable body is removed, the occlusion device can maintain a good occlusion state after being released, and the solid spring tube has appropriate flexibility and hardness, is not easy to stretch, has good force conduction, is convenient to use and operate, and the two sections of the steel cable body can respectively play their respective advantages during use.

[0034] In the embodiment, the number of wire strands of the hollow spring tube is 2 to 10. The number of layers of the hollow spring tube is 2 to 6. Further, the number of wire strands of each layer can be the same or different, which can be selected according to performance requirements.

[0035] In the embodiment, the hollow spring tubes of each layer are sequentially and closely non-overlapping structures along the length direction. That is, in the structure of each layer of the hollow spring tube, the multiple wire strands are parallelly attached together and wound, and the adjacent multiple wire strands are also attached, thereby forming a single-layer structure.

[0036] Specifically, Figure 2 A schematic view of the hollow spring tube after being stretched for two layers. The first section 11 includes outer layer wire 111 and inner layer wire 112, the outer layer wire 111 is 5 wire strands, and the inner layer wire 112 is 6 wire strands. It can be seen that the outer layer wire 111 is wound in the upper spiral direction, and the inner layer wire 112 is wound in the lower spiral direction. When the hollow spring tube has more layers, the outer layer wire 111 is continuously wound in the opposite spiral direction.

[0037] In the embodiment, the length ratio between the first section 11 and the second section 12 is 3:10 to 1:15. Specifically, the length of the first section 11 in the embodiment is 100 mm to 150 mm, and the length of the second section 12 is 500 mm to 1500 mm.

[0038] In the embodiment, the wire diameter of the wire of the hollow spring tube is 0.1 mm to 1 mm. The inner diameter of the hollow spring tube is 0.3 mm to 2.8 mm. The outer diameter of the hollow spring tube is 0.5 mm to 3.0 mm.

[0039] In the embodiment, the cable core is interwoven by multiple wire strands. Through the above setting, the cable core has good strength and is not easy to bend and deform.

[0040] In the embodiment, the outer diameter of the cable core is 0.3mm to 2.8mm, and the wire diameter of the single metal wire of the cable core is 0.1mm to 1.0mm. Further, the outer diameter of the single-layer solid spring tube is 0.5mm to 3.0mm.

[0041] As shown in Figure 1 The delivery cable further comprises a handle 30 which is integrally injection molded with the proximal end of the cable body 10.

[0042] In an alternative embodiment, the handle 30 is detachably connected with the proximal end of the cable body 10. Specifically, the handle 30 has an axial channel and a radial channel, the proximal end of the cable body 10 extends into the axial channel, and a handle screw is screwed into the handle 30 from the radial channel and is connected and fixed with the cable body 10.

[0043] In the embodiment, the connecting piece 20 is a cable bolt head, the head end of which is a screw rod with external threads, which is exposed outside the hollow spring tube, so as to be threadedly connected with the occluder.

[0044] As shown in Figure 3 The application further provides a delivery device comprising the delivery cable described above.

[0045] As shown in Figures 3 to 6 The delivery device further comprises a delivery sheath 40, a loader 50 and a dilator 60. The loader 50 is connected with the delivery sheath 40 and is used for loading the occluder.

[0046] In the embodiment, the delivery sheath 40 has a three-layer composite structure, 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 Pebax and added with a developing material. The distal end of the delivery sheath 40 is provided with a developing ring, the joint is made of ABS, the marker tube is made of PU, the end cap is made of ABS, the hemostatic valve is made of silicone rubber, the side tube is made of PVC, the three-way switch valve is made of HDPE, and the three-way switch seat is made of PC.

[0047] In the embodiment, the tube body of the loader 50 is made of HDPE and is translucent in color, and the joint is made of ABS; the marker tube is made of PU, the end cap is made of ABS, the hemostatic valve is made of silicone rubber, the side tube is made of PVC, the three-way switch valve is made of HDPE, and the three-way switch seat is made of PC.

[0048] In the embodiment, the main body material of the dilator 60 is made of HDPE, and the joint is made of HDPE.

[0049] In the embodiment, the proximal end portion of the delivery cable is provided with a first mark, which is used to align with the proximal end of the loader 50 when the distal end of the occluder is aligned with the distal end of the delivery sheath 40. Further, the first mark can be multiple, and the mark positions corresponding to the proximal end portion of the delivery cable are different due to the different sizes of the occluder and the different lengths of the occluder retracted in the delivery sheath 40, and different specifications of occluders are distinguished by the multiple first marks.

[0050] Further, the proximal end portion of the delivery cable is also provided with a second mark, which is used to align with the proximal end of the loader 50 when the occluder is completely pushed out of the delivery sheath 40. Correspondingly, the second mark can also be multiple, and the multiple second marks correspond to different specifications of occluders. By setting the first mark and the second mark, the operator can conveniently and reliably position the release of the occluder, which makes up for the problem that the DSA equipment cannot clearly detect the release of the occluder and is difficult to position.

[0051] In the embodiment, in order to mark more clearly, the colors, shapes, thicknesses, etc. of the multiple first marks and the multiple second marks can be different.

[0052] The use process of the occluder delivery device in the embodiment is as follows:

[0053] In use, the cable bolt head is threadedly connected with the nut of the occluder, and the occluder is retracted into the loader 50 through the delivery cable. After the loader 50 is connected with the delivery sheath 40, the occluder is pushed to the occlusion site by pushing the delivery cable. When the occluder is completely released, the hollow spring tube at the distal end of the delivery cable has excellent bending flexibility, so that the stress of the connection between the hollow spring tube and the occluder is eliminated, and the occluder is ensured to be in a relatively natural unfolded state. Finally, the handle 30 is rotated to disconnect the steel cable body 10 from the occluder, the delivery sheath 40 is pulled back to withdraw the entire delivery system, and all operations are completed. Before the occluder is completely released but not disconnected from the steel cable body 10, the excellent flexibility of the distal end of the steel cable body 10 makes the connection stress between the steel cable body 10 and the occluder easy to eliminate, thereby ensuring that the shape and position of the occluder are consistent with the effect after the delivery cable is removed.

[0054] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects: the conveying steel cable comprises a steel cable main body 10 and a connecting piece 20, the steel cable main body 10 comprises a first section 11 and a second section 12 connected in sequence, the first section 11 is a hollow spring pipe wound by multiple metal wires, the hollow spring pipe is a multi-layer structure, the spiral directions of adjacent two layers are opposite, the second section 12 is a single-layer solid spring pipe wound by a single metal wire around a cable core, the connecting piece 20 is arranged at the far end of the first section 11 and is used for detachably connecting with the occluder, in this way, by arranging the first section 11 and the second section 12 as the hollow spring pipe and the solid spring pipe with specific winding structures respectively, the hollow spring pipe has good longitudinal tensile force and thrust transmission performance, the transmission of torsional force is good, obvious deformation elongation does not occur during stretching, the steel cable main body is not easy to deform at a large bending angle, the overall flexibility is excellent, thereby the connecting stress between the occluder and the steel cable main body is easy to eliminate, the occlusion shape and position of the occluder are kept consistent after the steel cable main body is removed, the occluder can maintain a good occlusion state after being released, and the solid spring pipe has appropriate flexibility and hardness, is not easy to stretch, has good force transmission, is convenient to use and operate, and the two sections of the steel cable main body can play their respective advantages during use.

[0055] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0056] It should be noted that the terms "first", "second", and the like, as used in the specification, are intended to modify any one of the identified objects without necessarily limiting the number of such objects. It will be understood that the data so used are interchangeable under appropriate circumstances to permit the embodiments of the present application described herein to operate in other sequences than those illustrated or otherwise described herein.

[0057] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and the utility model can have various changes and changes for the person skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A transport cable, characterized in that The steel cable comprises a steel cable body (10) and a connecting piece (20), the steel cable body (10) comprises a first section (11) and a second section (12) connected in sequence, the first section (11) is a hollow spring tube wound by multiple metal wires, the hollow spring tube is a multi-layer structure, the spiral directions of adjacent two layers are opposite, the second section (12) is a single-layer solid spring tube wound by a single metal wire around a cable core, and the connecting piece (20) is arranged at the distal end of the first section (11) and used for detachably connecting with a plug.

2. The conveyor cable of claim 1, wherein, The length ratio between the first section (11) and the second section (12) is 3:10 to 1:

15.

3. The delivery steel cable according to claim 1, characterized in that, the wire diameter of the metal wire of the hollow spring tube is 0.1 mm to 1 mm; and / or the inner diameter of the hollow spring tube is 0.3 mm to 2.8 mm; and / or the outer diameter of the hollow spring tube is 0.5 mm to 3.0 mm.

4. The delivery steel cable according to claim 1, characterized in that, the number of the metal wire strands of the hollow spring tube is 2 to 10; and / or the number of the layers of the hollow spring tube is 2 to 6.

5. The conveyor cable of claim 1, wherein, The hollow spring tube of each layer is a non-overlapping structure that is sequentially and closely arranged along the length direction.

6. The conveyor cable of claim 1, wherein, The cable core is interwoven by multiple metal wires.

7. The conveyor cable of claim 1, wherein, The delivery steel cable further comprises a handle (30), the handle (30) is integrally injection molded with the proximal end of the steel cable body (10) or detachably connected with the proximal end of the steel cable body (10).

8. An occluder delivery device, characterized in that, The delivery steel cable comprises the delivery steel cable according to any one of claims 1 to 7.

9. The occluder delivery device of claim 8, wherein, The plug delivery device further comprises a delivery sheath tube (40) and a loader (50), the loader (50) is connected with the delivery sheath tube (40) and used for loading the plug, the proximal end portion of the delivery steel cable is provided with a first mark, and the first mark is used for aligning with the proximal end of the loader (50) when the distal end of the plug is aligned with the distal end of the delivery sheath tube (40).

10. The occluder delivery device of claim 9, wherein, The proximal end portion of the delivery steel cable is further provided with a second mark, and the second mark is used for aligning with the proximal end of the loader (50) when the plug is completely pushed out of the delivery sheath tube (40).

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