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Plugging device

An occluder and disk-shaped technology, which is applied in the field of occluders to occlude heart or intravascular defects, can solve the problems of increasing the heart load of patients, failure to occlude heart defects, and self-adaptive adjustment of the angle between the disk surface and the waist, etc. Achieve the effect of avoiding conduction block and avoiding residual shunt

Active Publication Date: 2018-03-06
LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] image 3 A disadvantage of the structural occluder is that an occluder can only occlude heart defects with a single hole of a certain diameter, and cannot occlude porous heart defects.
The usual practice is to use two or more occluders at the same time to fill and block each hole. Although this can block multiple holes, there is interference between the two devices that are closer to each other. Risk, resulting in incomplete and effective occlusion, and multiple devices not only increase the patient's heart load, but also increase the cost of the operation
[0005] image 3 Another disadvantage of structural occluders: it cannot be used to occlude narrow oblique channel-shaped defects, such as PFO defects
image 3 The waist of the structural occluder is relatively thick. When used for occlusion of PFO defects, the angle between the disk and the waist cannot be adjusted adaptively, and the disk will be tilted. The two disks cannot effectively fit the tissues on both sides of the interval, resulting in residual shunt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] like figure 1 As shown, an occluder includes a proximal disc-shaped structure 6 integrally braided by 144 nickel-titanium wires, a waist 3 and a distal disc-shaped structure 5, and the proximal disc-shaped structure 6 is connected to the distal end through the waist 3. The end disk-shaped structure 5, the side of the far-end disk-shaped structure 5 away from the waist is provided with a head 1 for fixing the distal disk-shaped structure, and the side of the proximal disk-shaped structure 6 away from the waist is provided with a head 1 for fixing the proximal disk-shaped structure. The bolt head 2 is tubular, and its inner surface is provided with an internal thread that can be connected with the conveying steel cable; the waist 3 is a bunch of rigid strips. Rigid means that the strip cannot be compressed and deformed radially or axially.

[0061] The proximal disc-shaped structure 6 is approximately parallel to the distal disc-shaped structure 5, and is respectively a...

Embodiment 2

[0076] like Figure 5 As shown, the occluder provided in this embodiment has a similar structure compared with the occluder in embodiment 1, the difference is that the edges of the proximal disc-shaped structure 6 and the distal disc-shaped structure 5 are all relative to their centers. It is sunken along the direction toward the waist, and the diameters of the two disk-shaped structures are larger than the diameter of the waist 3 . In a natural state, the diameters of the distal disc structure 6 and the proximal disc structure 5 are between 18-40 mm, and the diameter of the waist 3 is between 1.54-2.4 mm. The edges of the two disk-shaped structures are relatively concave and have a certain bevel, which is similar to a cup shape. Because the nickel-titanium wire is elastic, when the thickness of the defect is slightly larger than the distance between the edges of the two disks, the bevel angle of the edge of the disk will be adaptively adjusted smaller. Even in a parallel sha...

Embodiment 3

[0078] like Image 6 As shown, the occluder provided in this embodiment has a similar structure compared with the occluder in Embodiment 1, the difference is that the waist is composed of a connected first cylinder 19 and a rigid strip 20 , the two ends of the bar 20 are respectively connected to the geometric center of the first cylinder 19 and the proximal disc-shaped structure 6 ; the geometric center of the first cylinder 19 is connected to the geometric center of the distal disc-shaped structure 5 . The first column 19 can effectively fill and firmly hold the defect site to avoid residual shunt; meanwhile, because the disk surface of the proximal disk-shaped structure 6 is connected with the strip 20, the disk surface of the proximal disk-shaped structure 6 can be self-adaptive Adjust the included angle with the defect tissue so that the disc surface fits closely with the defect tissue.

[0079] The edge of the proximal disc-shaped structure 6 is recessed relative to its...

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PUM

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Abstract

The invention relates to a plugging device which comprises a near end disc-shaped structure, a waist part and a far end disc-shaped structure. The near end disc-shaped structure is connected to the far end disc-shaped structure through the waist part; the waist part comprises a bundle of rigid strip-shaped bodies formed by gathering multiple nickel-titanium metal wires. According to the plugging device, the waist part can accurately adapt to the size of a defect, the situation that due to the fact that the waist part is too large, radial supporting force, and surrounding tissue is influenced is avoided, and conduction blocking is avoided. Meanwhile, the waist part can effectively pack and tightly clamp the defect portion, and residual shunt is avoided.

Description

technical field [0001] The invention belongs to the field of interventional medical devices, in particular to an occluder which can be used to occlude defects in the heart or blood vessels. Background technique [0002] With the continuous development of interventional materials and devices and interventional cardiology, transcatheter interventional occluder minimally invasive treatment of atrial septal defect (ASD), ventricular septal defect (VSD), patent ductus arteriosus (PDA) and patent foramen ovale (PFO) and other congenital heart disease become an important method. Similarly, the use of interventional methods for endovascular occlusion is also a widely accepted treatment. [0003] Commonly used occluder structures such as image 3 As shown, the occluder has a structure of two discs and one waist, which is integrally braided by nickel-titanium wire. The waist 8 is a hollow cylinder with a certain diameter, and the diameters of the two discs 9 and 11 are slightly large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/00A61B17/12
CPCA61B17/0057A61B17/12122A61B17/12172A61B2017/00575A61B2017/00606A61B2017/00796
Inventor 张杰刘香东付明娟
Owner LIFETECH SCIENTIFIC (SHENZHEN) CO LTD