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

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...

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

[0005] In the existing left atrial appendage occluder with double-disc structure, the structure of the anchoring part is generally braided to form a mesh structure, and cut to form a rod shape. For the anchoring part of the braided mesh structure, due to the fact that the wires used in the braiding process will partially cross Therefore, the size of the delivery sheath required for the anchoring part of the braided mesh structure is often larger than that of the cutting structure under the same conditions; while the cutting rod-shaped anchoring part, because the ends of the rod-shaped structure are relatively spaced and suspended, After it is retracted into the sheath, and then pushed out again, there is a risk that the end of the support body is easy to kink, which leads to the failure of normal deployment of the anchoring part. Increasing the covering will increase the diameter of the sheath used

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