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

A staggered connection and occluder technology, applied in the field of medical devices, can solve the problems of increasing the overall length, residual shunt, and increasing the diameter of the sheath, so as to improve the sealing effect, avoid space interference, and eliminate the effects of easy kinking

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0187] Such as figure 1 As shown, the sealing part 1 of the left atrial appendage occluder of the present invention is braided with nickel-titanium wire. The sealing part 1 includes a disk surface 11, a waist 12 and a disk bottom 14. There is a plug head 13 at the end of the disk surface for connecting the delivery device. The sealing part 1 is a cage-shaped structure with a certain internal space as a whole. In the predetermined state, the waist 12 is roughly cylindrical, and a layer of flow-resistant film is respectively sewn in the middle area of ​​the disk surface 11, the waist 12, and the bottom 14 of the disk. (omitted in the figure).

[0188] Before the sealing part 1 and the anchoring part 2 are connected, they are shaped by high-temperature heat treatment of the mold. After the heat treatment and shaping, the sealing part 1 has a nickel-titanium wire 15 with a distal constriction treatment, which is equivalent to the connecting part of the sealing part 1 .

[0189] S...

Embodiment 2

[0215] 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, and one or two layers of flow-blocking films are arranged inside, and the middle part of the side of the sealing part facing the anchor part faces the anchor One side of the part protrudes, and is tightly pressed against the anchor part through the tapered part.

Embodiment 3

[0217] 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 disk, that is, the sealing disk, the sealing disk is a double-layer structure, and a flow-blocking film is arranged inside, under the effect of the pre-tightening force Next, the side of the sealing part facing the anchoring part is pressed against the anchoring part.

[0218] Description of release process

[0219] 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 tube 6 is provided on the outer sliding sleeve of the steel cable 5, and the left atrial appendage is sealed. The occluder is also accommodated in the sheath tube 6 after being compressed.

[0220] The left atrial appendage occluder passes throug...

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PUM

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Abstract

The invention discloses a left aurcle plugging device adopting a staggered connection 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, 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; and the anchoring part is formed through cutting, and the far-end side of the anchoring part is of a closed ring structure before release. For the left aurcle plugging device provided by the invention, the connecting method of the sealing part and the anchoring part is 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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