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Degradable woven occluder

An occluder and woven mesh technology, applied in the field of medical devices, can solve the problems of abrasion of surrounding tissues, third-degree conduction block of patients, intolerance of occluder, etc., to achieve excellent effect, avoid complications of occluder, Guaranteed sealing effect

Active Publication Date: 2017-10-20
SHANGHAI SHAPE MEMORY ALLOY
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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 a braided degradable occluder with good stability and occlusion performance, which avoids serious complications, and solves the problem that the existing occluders will wear the surrounding tissues, causing patients to suffer from Long-term third-degree conduction block, intolerance to occluder

Method used

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  • Degradable woven occluder
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  • Degradable woven occluder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Because the mechanical properties of the degradable wire, such as superelasticity, are much weaker than those of the shape memory alloy wire, in order to ensure the expected effect of the occluder in clinical applications, it is necessary to compensate the occluder structurally. The compensation scheme is as follows: Figure 1-Figure 3 As shown, at the upper end of the occluder, that is, a cut pipe (i.e. the connection structure 3) is added in the braided wire mesh 2 at the distal end of the braided degradable occluder of the present invention, and the upper end of the cut pipe is fixedly connected with the distal end 1 .

[0032] The lower end of the cut pipe is evenly split into 4 connecting rods 3-1, such as Figure 4 As shown, each connecting rod 3-1 is gathered in the axial direction of the cut pipe, such as figure 1 As shown, when the occluder is released, the cut tubing is assisted by the pullback of the auxiliary wire, and each connecting rod 3-1 at the lower e...

Embodiment 2

[0036] Such as figure 2 As shown, the lower end of the cut pipe is evenly split into four connecting rods 3-1, and each connecting rod 3-1 is gathered in the axial direction of the cutting pipe, and each connecting rod 3-1 on the cutting pipe is There is a curved hook 3-2 at the head end of the occluder. When the occluder is released, the cut tubing is assisted by the pull-back of the auxiliary wire, and each connecting rod 3-1 at the lower end of the cut tubing passes through the wire weaving of the occluder. The grid gap of the net 2 is drawn towards the axial direction, and the hook 3-2 is hooked to tighten the wire / grid of the wire braided net 2 near the proximal end 4 or the proximal end 4 of the occluder at the same time, so that the sealing The linear distance between the two ends of the occluder is consistent with the length of the cut pipe. At this time, the occluder is stable in the shape of "I" to ensure that the occluder does not fall off. At the same time, both t...

Embodiment 3

[0039] Such as image 3 As shown, the lower end of the cutting pipe is evenly split into four connecting rods 3-1, and each connecting rod 3-1 may not be gathered in the axial direction of the cutting pipe, and it has one or two bends at the head end. Hook 3-2, when the occluder is released, the cut tubing is assisted by the pullback of the auxiliary wire, and each connecting rod 3-1 at the lower end of the cut tubing passes through the grid of the wire braided mesh 2 of the occluder Gap, hook 3-2 to tighten the proximal end 4 of the occluder or the wire / grid of the wire braided mesh 2 near the proximal end 4, so that the linear distance between the two ends of the occluder is consistent with the length of the cut pipe At this time, the occluder is stable in the shape of "I", ensuring that the occluder does not fall off, and at the same time, both the disk surface 2-1 and the waist 2-2 have the effect of occlusion, achieving the effect of mechanical supplementation.

[0040] ...

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Abstract

The invention discloses a degradable woven occluder. The degradable woven occluder comprises a silk woven mesh, a far end and a near end, wherein the far end and the near end are arranged at both ends of the silk woven mesh; a connecting structure is arranged inside the silk woven mesh, the upper end of the connecting structure is connected with the far end, and the lower end of the connecting structure is connected with the near end or the silk woven mesh around the near end. The degradable woven occluder is completely degradable, thereby being high in long-term effects on patients and avoiding occluder complications induced by other long-term diseases; coupe pipes are hooks together in a separated mode, so that the degradable woven occluder can maintain an I-shaped form and can be good in adhesion to defects and further ensure stability and occlusion properties; an auxiliary wire can achieve protecting effects and can recover the degradable woven occluder when the degradable woven occluder falls off to avoid severe complications.

Description

technical field [0001] The invention relates to a braided degradable occluder, which belongs to the technical field of medical instruments. Background technique [0002] There are often occluders in the shape of mushroom umbrellas made of nickel-titanium shape memory alloys, which are widely used clinically. But its potential risks are as follows: [0003] 1. The occluder has been implanted in the heart for a long time. If the surrounding blood vessels bulge and lesion occurs, the occluder may wear the surrounding tissue and cause other diseases such as arterial dissection; [0004] 2. With the development and growth of patients, some patients have a certain probability of developing long-term third-degree conduction block; [0005] 3. A small number of patients are found to be allergic to Ni ions only after surgery, and they are intolerable to the occluder, which may cause other problems; Contents of the invention [0006] The technical problem to be solved by the pres...

Claims

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Application Information

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IPC IPC(8): A61B17/00A61B17/12
CPCA61B17/0057A61B17/12109A61B17/12122A61B17/12172A61B2017/00575A61B2017/00796A61B2017/00831
Inventor 潘湘斌李博曾凡艳杨永森陈娟蒲忠杰王广卉张红梅
Owner SHANGHAI SHAPE MEMORY ALLOY
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