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An improved left atrial appendage occluder

A technology of occluder and sealing disc, which is applied in the field of medical devices, can solve problems such as operation failure and increased risk of thrombus, and achieve the effects of reducing the risk of puncture, effectively and reliably occluding, and eliminating local stress concentration

Active Publication Date: 2018-05-01
HANGZHOU NUOMAO MEDTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The function of the left atrial appendage occluder is to completely block the opening of the left atrial appendage. Therefore, the reliability of the closure is very important. If the opening of the left atrial appendage cannot be completely blocked, the operation will fail and may further increase the thrombus Risks formed

Method used

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  • An improved left atrial appendage occluder
  • An improved left atrial appendage occluder
  • An improved left atrial appendage occluder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] Such as figure 1 As shown, the left atrial appendage occluder 100 provided by the present invention is composed of a sealing disc 110 and an anchoring device 120 .

[0098] The sealing disc 110 is a mesh structure braided by nickel-titanium wire, such as figure 2 As shown, the sealing disc 110 is composed of a disc surface 111 and a waist 112, a first fixed end 113 is provided at the center of the disc surface, a second fixed end 114 is provided at the center of the waist 112, and a layer of PET flow blocking film 115 is sewn inside the disc surface. A layer of flow blocking film 116 is sewn inside the waist portion 112 .

[0099] The first fixed end 113 is used to connect with the delivery device, and the second fixed end 114 is connected with the anchoring device 120 .

[0100] Such as figure 2 As shown, the waist 112 includes a diffusion section 117 radiating outward from the second fixed end 114, and a cylindrical body section 118 on the periphery of the diffus...

Embodiment 2

[0122] The difference between this embodiment and Embodiment 1 is that each nickel-titanium wire 2221 used to form the barb is connected to one of the inverted V-shaped nickel-titanium wires 2222 in the anchoring mesh frame by welding, and the welding area The length of 2223 is 2 mm, and the welding area 2223 is close to the apex 2224 where the two sides of the inverted V-shaped nickel-titanium wire intersect. The end 2225 of the nickel-titanium wire 2221 extending out of the welding area 2223 forms a barb 227, and the length of the end 2225 is 2 mm ( Figure 11b In H2=2mm), the distance between the end point 2226 of the end portion 2225 and the apex 2224 of the inverted V-shaped nickel-titanium wire is 8mm, as Figure 11a , Figure 11b , Figure 12a , Figure 12b shown.

Embodiment 3

[0124] The difference between this embodiment and Embodiment 1 is that the total length of each nickel-titanium wire 3221 used to form the barb is 5 mm, and the nickel-titanium wire 3221 is divided into a fixed section and a free section, and the fixed section passes through the steel sleeve 3223 and the free section. The nickel-titanium wire 3222 of the anchoring device frame is connected together, the length of the fixed section is 3mm, and the fixed section is completely located inside the steel sleeve 3223; 2mm (ie Figure 13b In H3=2mm), the distance between the end point 3226 of the free section 3225 and the apex 3224 of the inverted V-shaped nickel-titanium wire is 8mm, as Figure 13a , Figure 13b , Figure 14a , Figure 14b shown.

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Abstract

The invention discloses an improved left atrial appendage occluder, which comprises an interconnected sealing disc and an anchoring device, and at least two blocking films are arranged inside the sealing disc. The part where the anchoring device cooperates with the left atrial appendage is an anchoring net, and the anchoring net is a boneless structure. The overall anchoring device is a boneless structure. The anchoring device is braided by metal wire, and the distal end is open, the proximal end of the anchoring device is constricted and connected to the sealing disc to form a conical mesh, the distal end of the anchoring device is open and rolled up to the proximal end to form the anchor A fixed net, and an anchor net surrounds the conical net. The improved left atrial appendage occluder provided by the present invention can block the opening of the left atrial appendage in multiple layers, anchor the force uniformly inside the left atrial appendage, eliminate local stress concentration, realize repeatable release, and effectively and reliably block the left atrial appendage. The opening of the auricle.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to an improved left atrial appendage occluder. Background technique [0002] Atrial fibrillation (abbreviated as atrial fibrillation) is the most common sustained arrhythmia, and with age, the incidence of atrial fibrillation continues to increase, reaching 10% in people over 75 years old. [0003] During atrial fibrillation, the frequency of atrial excitation reaches 300-600 beats per minute, the heartbeat frequency is often fast and irregular, and the atrium loses effective systolic function. In atrial fibrillation, the contractility of the left atrial appendage decreases, coupled with the morphological characteristics of the left atrial appendage itself and the unevenness of the muscle trabeculae in the left atrial appendage, the blood flow in the left atrial appendage produces vortices and slows down the flow rate, which promotes the formation of thrombus. In patien...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/12
CPCA61B17/12045A61B17/12122A61B17/12168A61B2017/1205A61B2017/00831A61B2017/00796A61B17/12177A61B17/12031A61B17/12172A61B2017/00526A61B17/12A61B2017/00243A61B2017/00579
Inventor 王永胜訾振军张庭超
Owner HANGZHOU NUOMAO MEDTECH CO LTD
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