Variable waist design left atrial appendage occluder

An occluder, a variable technology, used in medical science, surgery, ligation, etc., to achieve the effect of repeated recovery and release, reducing residual shunt, and reducing the difficulty of surgery

Active Publication Date: 2019-07-23
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 left atrial appendage occluder with a variable waist design that is simple in structure, easy to use, and reduces the difficulty of surgery, and solves how to make the occluder convenient for occluding the left atrial appendage without Problems affecting pulmonary venous return and mitral valve opening and closing

Method used

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  • Variable waist design left atrial appendage occluder
  • Variable waist design left atrial appendage occluder
  • Variable waist design left atrial appendage occluder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The invention is a left atrial appendage occluder with a variable waist design, which is a left atrial appendage occluder with a small incision through the chest. Such as figure 1 As shown, it consists of an upper steel sleeve 1, a lower steel sleeve 2, a blocking disc 3, a cone 4, a waist 5, a fixed disc 6 and an internal flow blocking film 7 (ie, a high temperature resistant polyester film). The main body is braided from Nitinol wire or cut from Nitinol tube. The sealing disc 3 is provided with an upper steel sleeve 1, and the fixed disc 6 is provided with a lower steel sleeve 2. The fixed disc 6 is connected with one end of the waist 5, and the other end of the waist 5 is connected with the conical body 4 that allows the waist 5 to be recessed. One end is connected, and the other end of the cone 4 is connected with the blocking disk 3 , and a flocculent skirt 8 is provided around the blocking disk 3 .

[0032] The diameter of the blocking disc 3 is greater than the...

Embodiment 2

[0045] In this embodiment, two layers of flow-blocking membranes 7 are sewn inside the left atrial appendage, each of the blocking disk 3 and the fixed disk 6 has a layer of flow-blocking membranes 7 , and no flow-blocking membranes 7 are sewn inside the cone body 4 and the waist 5 .

[0046] The waist 5 has a multi-disk structure, that is, on the basis of Example 1, 3 groups of discs are added to the columnar net, which further increases the range of variation in the height of the occluder. When the patient's left atrial appendage is shallow, such as Figure 7 , Figure 8 The shape shown can complete effective occlusion; when the patient’s left atrial appendage is deep, the multi-disc surface of the waist 5 can be straightened, changing from a disc shape to a column shape, and the overall height of the occluder can be increased to adapt to the deeper left atrial appendage. structure to realize the adjustment of the height of the waist 5; if the height of the occluder still do...

Embodiment 3

[0049] In this embodiment, there are 6 layers of flow-blocking membranes 7 sewn inside the left atrial appendage, and 6 layers of flow-blocking membranes 7 are stitched together in the occlusion disk 3, the cone 4, the waist 5 and the fixed disk 6, wherein the occlusion disk 3 and the fixed The discs 6 are at least sewn with a flow blocking film 7 .

[0050] The material used in the present invention is polydioxanone, which is a degradable material, and four layers of degradable polylactic acid films are sewn inside the occluder. The waist 5 is designed to be arc-shaped. For some special left atrial appendages 9, sometimes the blocking disk 3 and the fixed disk 6 cannot be fixed on the same axis. Perfect release with fixed disc 6, as Figure 9 with 10 shown.

[0051] In the left atrial appendage occluder in this embodiment, after the occluder is completed, endothelial cells begin to cling to the surface of the occluder. As time goes on, the endothelialization is complete, a...

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Abstract

The invention discloses a left atrial appendage occluder with a variable waist design, which includes a fixed disk and a blocking disk. Both the fixed disk and the blocking disk are provided with flow-blocking films. The blocking disk is provided with an upper steel sleeve. The fixed disk There is a lower steel sleeve on the top, and the characteristic is that the fixed plate is connected to one end of the waist, the other end of the waist is connected to one end of the cone that can make the waist recessed, and the other end of the cone is connected to the blocking plate. The sealing disk is surrounded by a flocculent skirt. The present invention has a simple structure, is easy to use, reduces the difficulty of surgery, and can fit the left atrial appendage occluder to its inner wall according to the specific conditions of the left atrial appendage. It can effectively fix the occluder, effectively reduce the occurrence of residual shunt, and will not It leads to additional perforation events of the left atrial appendage, and the occluder is easily retracted and released repeatedly.

Description

technical field [0001] The invention relates to a left atrial appendage occluder with a variable waist design, which belongs to the technical field of heart surgery medical instruments. Background technique [0002] Atrial fibrillation (AF) is the loss of normal and regular contraction of the myocardium, replaced by rapid and uncoordinated weak peristalsis, resulting in the loss of normal effective contraction of the atrium. In the general population, the prevalence of atrial fibrillation is 1% to 2%, and it gradually increases with age, and it can reach 5% to 15% for people over 80 years old. It is conservatively estimated that there are currently about 8 million patients with atrial fibrillation in my country. 10 million. According to the 2014 National Economic and Social Development Statistical Bulletin of the National Bureau of Statistics, among the 1.367 billion people in China in 2014, 212 million people were aged 60 and above, accounting for 15.5% of the total populat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/12
CPCA61B17/12031A61B17/12122A61B17/12168A61B17/12172
Inventor 刘光罗鹏李博曾凡艳杨永森陈娟
Owner SHANGHAI SHAPE MEMORY ALLOY
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