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Stopper and manufacturing method thereof

一种制造方法、封堵器的技术，应用在纺织品和造纸、医药科学、支架等方向，能够解决增加封堵器回收入鞘阻力、加重手术难度和风险、心脏内组织损害等问题，达到减少长期金属释放量、消除长期电化学腐蚀、减小入鞘阻力的效果

Active Publication Date: 2011-01-05
LIFETECH SCI (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an occluder and its manufacturing method to solve the long-term damage to the inner heart tissue caused by the permanent metal head of the occluder in the prior art. The long-term corrosion of the occluder, the piled wire phenomenon at the distal end of the occluder increases the resistance of the occluder to the sheath, it is difficult to adapt to a smaller sheath tube, and the difficulty and risk of the operation are increased.

Method used

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  • Stopper and manufacturing method thereof
  • Stopper and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0077] Such as Image 6 As shown, first, a metal mesh tube 30 is braided on a cylindrical metal mold rod 10 with nickel-titanium alloy wires. A braided chuck 13 is provided on the head of the mold rod 10, and two circles of holes are respectively punched around the axis of the mold rod 10. These two circles are concentric circles, the first circle is axisymmetrically arranged with twelve holes, and the second circle is arranged with twenty-four holes on the periphery. Twelve rays are drawn from the center of the circle to the twelve small holes on the inner circle, and they intersect with the outer circle at twelve points. The twelve points and the twenty-four small holes on the periphery are evenly distributed on the outer ring, and there are two small holes between two adjacent points. This embodiment is a two-stage woven net, and two circles of small holes need to be provided on the woven chuck 13. Similarly, for multi-step woven nets, multiple circles of small holes can be...

Embodiment 2

[0083] The second embodiment of the present invention is an improvement on the basis of the first embodiment. When placing the first-stage mesh 21, one of the first-stage meshes is made to pass through all other first-stage meshes at the bending position of the corresponding first-stage hanging screw 11, this first-stage mesh The wire wraps around the other first-stage thread-hanging rods 11 in the same circle to form a ring, and then hangs on the corresponding first-stage thread-hanging rod 11, and then starts the weaving of the first-order weaving net 221, such as Picture 20 Shown. The subsequent process is basically the same as the first embodiment, except that the steps of connecting the openings 32 with the suture 70 are reduced, because the above second embodiment can also achieve this purpose.

Embodiment 3

[0085] The third embodiment of the present invention is an improvement on the basis of the first embodiment. The first few steps are exactly the same as the first embodiment. When placing the second-stage mesh wires 22, each second-stage mesh wire 22 is made to form a thin ring around a second-stage hanging screw rod 12, and the two branches formed by each are woven together, such as Figure 21 Shown. The subsequent process is exactly the same as the first embodiment. The thin ring formed by the bending of the mesh wire is not easy to break when compressed and deformed, which improves the safety of the metal mesh and facilitates the suture thread to pass through.

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Abstract

The invention relates to a stopper, comprising a remote end, a near end and an elastic weaving body arranged between the remote end and the near end and waved by meshes. The elastic weaving body is waved by multi-step rayon meshes which at least comprise a first-step rayon mesh arranged most closely to the remote end and waved by a plurality of first-step meshes and a second-step rayon mesh waved by a plurality of first-step meshes and a plurality of second-step meshes. The minimal cross section of the first-step rayon mesh after being compressed towards a direction vertical to the axial direction of the elastic weaving body is smaller than the minimal cross section of any other-step rayon mesh after being compressed towards the axial direction. The invention also relates to a method for manufacturing the stopper. Because of the use of multi-step rayon meshes, the stopper does not need a permanent plug, thereby not only reducing the risk of the damage of a metal plug to the human body, but also well avoiding the stacked meshes when the remote end of the traditional stopper without a plug is withdrawn and put back to the scabbard, and greatly reducing the sheathing resistance. In addition, the stopper is suitable for smaller sheath catheter, and reduces the operation difficulty.

Description

Technical field [0001] The invention relates to a medical device and a manufacturing method thereof, in particular to an interventional therapy device that can be used to seal defects in the heart or blood vessel and a manufacturing method thereof. Background technique [0002] With the continuous development of interventional materials and devices and interventional cardiology, minimally invasive treatment of atrial septal defect (VSD), ventricular septal defect (ASD), patent ductus arteriosus (PDA) and patent foramen ovale with transcatheter interventional occluders (PFO) and other congenital heart disease have become important methods. Intravascular occlusion by interventional methods is also a widely accepted treatment. [0003] For example, Chinese Patent No. 97194488.1 discloses a cardiac occluder, such as figure 1 with figure 2 As shown, the heart occluder includes a plug head 1, a metal mesh 2, a baffle film 3, and a head 4. Such as Figure 5 As shown, one end of the bol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/02
CPCA61B2017/00526A61B2017/00867D10B2509/06D04C1/06A61B17/12172A61B2017/00004A61B2017/00606A61B17/0057A61B17/12109A61B2017/00592
Inventor 刘香东曾卫军
Owner LIFETECH SCI (SHENZHEN) CO LTD
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