A left atrial appendage occlusion device and a delivery system

Abstract

The invention discloses a left auricle plugging device and a transport system. The left auricle plugging device comprises a stent and a plugging device body. Firstly, the stent is implanted and fixed on the left auricle inlet position, the double-tray-shaped plugging device body is released on the stent for plugging a left auricle, and therefore the problem of cerebral apoplexy caused by left auricle thrombus because of atrial fibrillation can be solved. The left auricle plugging device is provided with the self-expandable nitinol stent, the stent is firmly fixed on the left auricle inlet position by depending on anchoring thorns, and then the appropriate plugging device body is released on the stent. The transport system transports the left auricle plugging device to the left auricle position. Compared with the prior art, the stent is firstly fixed on the left auricle inlet position, then the double-tray-shaped plugging device body is released on the stent, and therefore release accuracy and implanting stability of the plugging device body are improved, and the plugging device body has selectivity. After release, the stent and the the plugging device body can be recovered to a catheter for relocation or replacement.

Description

technical field [0001] The invention relates to the technical field of medical devices, more specifically, a left atrial appendage occlusion device and a delivery system. Background technique [0002] Stroke is a major complication of disability and death in patients with atrial fibrillation (AF). Epidemiological data show that about 15 million people worldwide suffer from stroke every year, of which 15% to 20% are attributed to atrial fibrillation. Studies have shown that 60% of patients with rheumatic heart disease and atrial fibrillation have cardiogenic thrombus from the left atrial appendage, while this proportion is >90% in patients with non-valvular atrial fibrillation. Therefore, people pay more and more attention to the research on embolism complications of atrial fibrillation, and how to prevent and treat the occurrence of stroke in atrial fibrillation has important clinical significance. [0003] At present, there are three methods for the treatment of atrial...

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Problems solved by technology

[0004] At present, percutaneous left atrial appendage occlusion is to place an occluder into the left atrial appendage through catheter intervention, which has considerable limitations: the anatomical structure of the left atrial appendage is complex, with different shapes and depths, and most occluders cannot fully adapt The anatomical structure of the left atrial appendage is difficult to achieve stable fixation; the opening and internal shape of the left atrial appendage is irregular, and the surface is uneven. The occluder membrane can form many pit-like gaps at the opening of the left atrial appendage, making it difficult to completely block the mouth of the left atrial appendage , the ideal occlusion effect cannot be achieved; at the same time, in the existing products, the anchor thorns are soft and difficult to penetrate into the wall of the left atrial appendage, and stable fixation cannot be achieved, or the hard anchor thorns have sufficient puncture force, but It will hinder the recovery, repositioning and replacement of the occluder, and even puncture the left atrial appendage; in addition, the occluder is in the left atrial appendage, and its supporting force will expand the left atrial appendage, causing wear between the left atrial appendage and the pericardium

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