Left aurcle plugging device with closed ring structure and assembly method of left aurcle plugging device

An occluder and closed-loop technology, which is applied in the field of medical devices, can solve the problems of increasing the overall length, hanging, and increasing the diameter of the sheath, so as to ensure the sealing effect, improve the sealing performance, and reduce the effect of residual shunt

Pending Publication Date: 2018-12-04
HANGZHOU NUOMAO MEDTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the sealing part cannot fit tightly with the left atrial appendage, it may cause the sealing part to hang in the left atrium, which cannot effectively block the opening of the left atrial appendage, and may further increase the risk of thrombosis
One of the main factors causing the sealing part to not be effectively attached to the left atrial appendage is related to the connection mode between the sealing part and the anchoring part, that is, the anchoring part and the sealing part cannot be tightly connected together, and the product The overall length of the product is longer, and the anchoring part is radially compressed after release, which further increases the overall length of the product after release. At the same time, it can cause the axial distance between the sealing part and the anchoring part to increase, and the sealing part cannot be effectively attached to the product after it is released. Left atrial appendag

Method used

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  • Left aurcle plugging device with closed ring structure and assembly method of left aurcle plugging device
  • Left aurcle plugging device with closed ring structure and assembly method of left aurcle plugging device
  • Left aurcle plugging device with closed ring structure and assembly method of left aurcle plugging device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0159] Example 1

[0160] Such as figure 1 As shown, the sealing part 1 of the left atrial appendage occluder of the present invention is woven with nickel-titanium wire. The sealing part 1 includes a disc surface 11, a waist portion 12 and a disc bottom 14, and a plug 13 at the end of the disc surface is used to connect the delivery device. The sealing portion 1 as a whole is a cage-shaped structure with a certain internal space. In a predetermined state, the waist 12 is roughly cylindrical, and a layer of baffle film is sewn into the disc surface 11, the axial middle area of ​​the waist 12 and the disc bottom 14 respectively. (Omitted in the figure).

[0161] Before the sealing part 1 and the anchoring part 2 are connected, they are shaped by high temperature heat treatment of a mold. After the heat treatment and shaping, the sealing part 1 has a nickel-titanium wire 15 with a distal end bundled treatment.

[0162] Such as Figure 2a~Figure 2b As shown, the anchoring part 2 is for...

Example Embodiment

[0185] Example 2

[0186] See Figure 5 The difference between this embodiment and embodiment 1 is only the shape of the sealing part 1. The sealing part is an inverted cone with one or two layers of baffle film inside, and the middle part of the side facing the anchoring part of the sealing part faces the anchor One side of the part is convex, and it is pressed tightly with the anchor part through the tapered part.

Example Embodiment

[0187] Example 3

[0188] See Image 6 The difference between this embodiment and embodiment 1 is only the shape of the sealing part 1. The sealing part 1 is a flat disc, that is, a sealing disc. The sealing disc is a double-layer structure with a flow blocking film inside, which plays a role in the pretensioning force. Next, the side of the sealing part facing the anchoring part abuts against the anchoring part.

[0189] Description of the release process

[0190] See Figure 7a ~ Figure 7d ,as well as Figure 8a~Figure 8d Taking the left atrial appendage occluder of embodiment 3 as an example, the release process is that the left atrial appendage occluder is connected to the operating handle through a steel cable 5, and a sheath 6 is provided on the outer sliding sleeve of the steel cable 5, and the left atrial appendage seals The occluder is also housed in the sheath 6 after being compressed.

[0191] The left atrial appendage occluder in the direction of arrow B passes through th...

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PUM

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Abstract

The invention discloses a left aurcle plugging device with a closed ring structure and an assembly method of the left aurcle plugging device. The left aurcle plugging device comprises a sealing part and an anchoring part which are connected with each other, wherein the sealing part and the anchoring part abut against each other, the anchoring part is formed through cutting, and before release, thefar-end side of the anchoring part is of a closed ring structure. For the left aurcle plugging device, the shape of the tail end (the end far away from the sealing part before release) of the anchoring part is improved, so that the twisting of the tail end is prevented, and the release of a plurality of times is facilitated. Further, the connecting mode of the sealing part and the anchoring partis also improved, so that the integral axial elongation of the left aurcle plugging device can be avoided and delayed, and further, the sealing part attaches to and plugs the left aurcle opening.

Description

technical field [0001] The invention relates to a medical device, in particular to an interventional treatment device for blocking the left atrial appendage. Background technique [0002] Atrial fibrillation (abbreviated as atrial fibrillation) is the most common sustained cardiac arrhythmia. The incidence of atrial fibrillation continues to increase with age, up to 10% of people over the age of 75. 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 shape characteristics of the left atrial appendage itself and the unevenness of the muscle trabeculae in the left atrial appendage, which makes the blood flow in the left atrial appendage vortex and slows down, which promotes the formation of thrombus. More than 90% of left atrial thr...

Claims

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Application Information

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IPC IPC(8): A61B17/12
CPCA61B17/12109A61B17/12122A61B17/12168A61B17/12172A61B17/12177A61B2017/00477A61B2017/00243A61B2017/00526A61B2017/00867A61B2017/1205A61B2017/12054
Inventor 王永胜李建民丘家明
Owner HANGZHOU NUOMAO MEDTECH CO LTD
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