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Left aurcle plugging device adopting staggered connection and assembly method of left aurcle plugging device

A technology of staggered connection and occluder, which is applied in the field of medical devices, can solve the problems of increasing the overall length, residual shunt, suspension, etc., and achieve the effect of reducing spacing, avoiding space interference, and improving sealing effect

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 appendage ostium, causing residual shunt

Method used

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  • Left aurcle plugging device adopting staggered connection and assembly method of left aurcle plugging device
  • Left aurcle plugging device adopting staggered connection and assembly method of left aurcle plugging device
  • Left aurcle plugging device adopting staggered connection and assembly method of left aurcle plugging device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0177] Such as figure 1 As shown, the left atrial appendage occluder 1000 according to Embodiment 1 of the present invention includes a sealing part 1100 and an anchoring part 1200 connected to each other. The sealing part 1100 is braided by nickel-titanium wire, and the anchor part 1200 is formed by cutting a pipe.

[0178] The sealing part 1100 consists of a disk surface 1110, a waist 1120 and a disk bottom 1170. There is a plug head 1130 at the end of the disk surface, a layer of PET flow-blocking film 1140 is sewn inside the disk surface, and a layer of flow-blocking film 1150 is sewn inside the middle of the waist. There is a layer of flow blocking film 1160 in the inner seam.

[0179] The anchoring part 1200 is composed of an inner mesh cone 1210, an outer mesh cylinder 1220, an outer end bending part 1230, an arc transition part between the inner mesh cone 1210 and the outer mesh cylinder 1220 1240 , and the arc transition part 1250 between the outer mesh cylinder 122...

Embodiment 2

[0213] The left atrial appendage occluder 2000 of the second embodiment of the present invention is composed of a sealing part 2100 and an anchoring part 2200, and the structural shape of the sealing part and the anchoring part after heat setting is the same as that of the first embodiment. The difference from Embodiment 1 lies in the connection mode between the anchoring part and the sealing part. The weaving method is taken as an example to describe in detail below.

[0214] Such as Figure 9a and Figure 9b shown.

[0215] Sealing part 2100 and anchoring part 2200 of left atrial appendage occluder 2000 heat-treated and finalized in Embodiment 2 of the present invention, wherein sealing part 2100 has a distal nickel-titanium wire bundle, and anchoring part 2200 has a proximal nickel-titanium wire bundle .

[0216] Such as Figure 10 As shown, in this embodiment, the distal nickel-titanium wire 2171 of the sealing part and the proximal nickel-titanium wire 2261 of the an...

Embodiment 3

[0224] The left atrial appendage occluder 3000 in the third embodiment of the present invention is composed of a sealing part 3100 and an anchoring part 3200. The structural shape of the sealing part 3100 and the anchoring part 3200 after heat setting is the same as that of the first and second embodiments. The difference from Embodiment 1 and Embodiment 2 lies in the way of connection between the anchoring part and the sealing part. The weaving method is taken as an example to describe in detail below.

[0225] Such as Figure 11a and Figure 11b shown.

[0226] Sealing part 3100 and anchoring part 3200 of left atrial appendage occluder 3000 heat-treated and finalized in Embodiment 3 of the present invention, wherein sealing part 3100 has a distal nickel-titanium wire bundle, and anchoring part 3200 has a proximal nickel-titanium wire bundle . Figure 12a~ Figure 13 It is another way of connecting the sealing part 3100 and the anchoring part 3200 of the left atrial appen...

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PUM

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Abstract

The invention discloses a left aurcle plugging device adopting staggered connection and an assembly method of the left aurcle plugging device. The left aurcle plugging device comprises a sealing partand an anchoring part which are connected with each other, wherein the anchoring part is provided with a net structure formed through cutting, each of the sealing part and the anchoring part is provided with a connecting part formed through shape convergence, and the connecting parts of the sealing part and the anchoring part extend opposite to each other and realize staggered fixing. According tothe left aurcle plugging device and the assembly method, the staggered connection of the sealing part and the anchoring part is realized by improving the connecting method, thus the sealing part cantightly attach to the left aurcle and plug the left aurcle opening, and therefore, the occurrence rates of internal leakage and residual shunt are reduced.

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