Split left auricle closure device

Abstract

The invention discloses a split left auricle closure device. The split left auricle closure device comprises an anchor device and a seal disc which are arranged in a split mode, one of the anchor device and the seal disc is provided with a cylindrical first connector, and the other one of the anchor device and the seal disc is provided with a second connector matched with the cylindrical wall of the first connector to achieve connection. A limiting hole and hook matching mode can be adopted for the first connector and the second connector, and an interference fit mode can also be adopted at the same time or independently. According to the separable left auricle closure device, the distance between the anchor device and the seal disc can be adjusted according to the form of the left auricle, and thus the seal disc can completely isolate the left atrium from the left auricle.

Description

technical field [0001] The invention relates to the field of transcatheter interventional medical devices, in particular to a split-type left atrial appendage occluder. Background technique [0002] Studies have confirmed that more than 90% of thrombi in patients with non-valvular atrial fibrillation form in the left atrial appendage, and sealing the left atrial appendage can reduce the risk of thromboembolism in patients with atrial fibrillation. The left atrial appendage occluder is an implantable device that enters the human body through a catheter and can close the left atrial appendage. It can block the blood flow into the left atrial appendage, eliminate the risk of thrombosis in the left atrial appendage due to atrial fibrillation, and prevent stroke. [0003] Left atrial appendage occluder implantation is a minimally invasive interventional procedure with short treatment period, less trauma, and quick results. The earliest clinically used left atrial appendage occlud...

AI Technical Summary

Problems solved by technology

In this technical solution, there is no obvious difference between the double-disc occluder and the conventional occluder, but the anchoring area of ​​the left atrial appendage is increased by implanting a metal stent to prevent the occluder from falling off, but the anchor cannot be adjusted according to the anatomical structure of the left atrial appendage. The distance between the fixed disk and the sealing disk, the double-disc occluder can move freely in the axial direction between the proximal end surface and the distal end surface of the metal stent, which will cause the waist of the double-disc occluder to be too long or If it is too short, the occluder will be deformed after deployment, resulting in poor sealing of the sealing disk

[0006] In the above technology, the distance between the anchoring disc and the sealing disc is fixed and not adjustable, but due to individual differences, each patient has a different tissue defect or position that needs to be blocked, and the distance between the anchoring disc and the sealing disc is fixed. Often can not well solve the complex and changing clinical needs

For example, taking the left atrial appendage occluder as an example, the implantation position of the anchoring disc has an important impact on the occlusion effect. Generally, if the anchoring disc is implanted too deep, the sealing disc will be squeezed and deformed, and the edge will warp, causing Residual shunt, at the same time, the tension between the anchoring disc and the sealing disc is too large, which may seriously tear the inner wall of the left atrial appendage; if the anchoring disc is implanted too shallow, the sealing disc cannot attach to the atrium wall, which will also cause residual shunt

[0007] When the left atrial appendage is not completely sealed, resulting in residual shunt, the anchoring plate needs to be taken out, and the release position should be selected again. During the process of repeated removal and release of the anchoring plate, the barbs on the anchoring plate that prevent falling off may cause left The inner wall of the atrial appendage is damaged or the plaque falls off, resulting in the formation of thrombus, which increases the pain of the patient while prolonging the operation time, and easily brings other iatrogenic risks

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