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Occluder, preparation method thereof and implantation instrument

A technology of occluder and frame, which is applied in the field of medical devices, can solve the problems of uneven mesh, displacement of choke film, uneven force of occluder devices, etc., and achieve good stability

Active Publication Date: 2020-03-17
LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since weaving is a woven net in which multiple wires are staggered up and down to form a grid, the wires in the upper and lower layers of the woven net are only interlaced, and there is no fixed connection between the wires, which will lead to the stability of the woven net. Poor sex
During the operation process, the force on each part of the occlusion device is uneven, which easily causes the braided wires to shift each other, resulting in uneven mesh, which will affect the shape of the occlusion device after implantation in the human body, thus affecting the treatment effect
In addition, in order to increase the blocking effect, it is usually necessary to add a blocking film to the braided mesh. Uneven force on the braided mesh or the displacement of the braided wire will also cause the displacement of the blocking film, which will affect the blocking effect and affect the treatment effect.

Method used

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  • Occluder, preparation method thereof and implantation instrument
  • Occluder, preparation method thereof and implantation instrument
  • Occluder, preparation method thereof and implantation instrument

Examples

Experimental program
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preparation example Construction

[0079] see Figure 12 , the preparation method of the occluder of an embodiment, comprises the steps:

[0080] Step 110: providing a blocking frame, the blocking frame is braided by a plurality of braided wires interlaced to form a plurality of network nodes.

[0081] The material of the braided silk is the same as above, and will not be repeated here.

[0082] In the sealing frame, the braided wires are staggered up and down. For example, the weaving filaments are staggered up and down to form a well-shaped weaving grid. There is only a simple overlap between the braided filaments, simple contact, and no fixed connection is formed. The braided wire is braided to form a braided net and then shaped to form a blocking frame. The wire diameters of the weaving wires interlaced up and down, for example, the wire diameters of the warp weaving wires and the weft weaving wires may be the same or different. The numbers of warp weaving yarns and weft weaving yarns may be the same o...

Embodiment 1

[0125] A group of 20 poly-L-lactic acid (PLLA) braided wires arranged in parallel with a wire diameter of 0.40 mm is used as a longitude braided wire and a group of 20 parallel-arranged poly-L-lactic acid (PLLA) braided wires with a wire diameter of 0.40 mm is used as a latitude The braided wires are interlaced up and down to form a braided net, and the braided net is heat-set to form a plugging frame. The plugging frame includes a first plugging unit, a second plugging unit and connecting the first plugging unit and the second plugging unit respectively. The waist-blocking framework includes multiple network nodes.

[0126] Dissolve poly-racemic lactic acid (PDLLA) in acetonitrile to prepare a binder solution, isolate and protect the first plugging unit and the second plugging unit of the blocking frame, and immerse the waist in a 30 mg / mL binder solution In the process, after dipping for at least 5s, the plugging frame is lifted out of the binder solution at a speed of 0.5m / ...

Embodiment 2

[0130] A group of 30 poly-L-lactic acid (PLLA) braided wires arranged in parallel with a wire diameter of 0.10 mm is used as a longitude braided wire and a group of 30 parallel-arranged poly-L-lactic acid (PLLA) braided wires with a wire diameter of 0.10 mm is used as a latitude The braided wires are interlaced up and down to form a braided net, and the braided net is heat-set to form a plugging frame. The plugging frame includes a first plugging unit, a second plugging unit and connecting the first plugging unit and the second plugging unit respectively. The waist-blocking framework includes multiple network nodes.

[0131] Dissolve poly(racemic lactic acid) in acetone to prepare a saturated binder solution, immerse the entire sealing frame in the binder solution, and after 1 min, lift the sealing frame from the binder solution at a speed of 0.1m / s It is proposed that after the liquid film is broken with cold wind, the adhesive is deposited on the network nodes of the sealing...

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Abstract

The invention relates to an occluder, a preparation method thereof and an implantation instrument. The occluder comprises an occluding frame, the occluding frame is formed by weaving a plurality of weaving wires, the weaving wires are staggered to form a plurality of network nodes, the network nodes comprise fixed network nodes, and the weaving wires are fixedly connected at the fixed network nodes. The fixed network node can restrain the deformation of the occluding frame, so that the stability of the occluder is better.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to an occluder, a preparation method thereof, and an implantation instrument. Background technique [0002] In 1974, King and Mills completed the transcatheter interventional treatment of atrial septal defect (Atrial Septal Defect, ASD) for the first time. Since then, with the continuous improvement of occlusion devices, especially since 1997, with the Amplatzer nickel-titanium alloy braided With the advent of occluders, nickel-titanium alloy braided occluders are widely used in congenital heart diseases such as atrial septal defect (ASD), ventricular septal defect (VSD), patent ductus arteriosus (PDA), and patent foramen ovale (PFO). disease intervention. At present, the minimally invasive treatment of atrial septal defect ASD, VSD, PDA, PFO and other congenital heart diseases through catheter intervention occluder has become an important method. [0003] At present, most of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/00
CPCA61B17/0057A61B2017/00606A61B2017/00526A61B2017/00601
Inventor 陈贤淼
Owner LIFETECH SCIENTIFIC (SHENZHEN) CO LTD