left atrial appendage occluder

Abstract

A left atrial appendage occluder belongs to the field of medical devices. The device has a blocking disk, blocking umbrella, elastic column, disk-column connector and threaded connector. The surface of the blocking umbrella and blocking disk is covered with a permeable polytetrafluoroethylene membrane. This occluder is mainly made of nickel-titanium alloy. The occluder is in the shape of a bowl with barbs fixed on the edge, which is easy to position. The elastic rod with a spiral structure of the elastic column can realize the repositioning of the occluder disk after the occluder is released. Positioning can realize the functions of telescopic and changing the direction of the occlusion disk, which reduces the angle requirement of the delivery sheath relative to the left atrial appendage during surgery; in addition, there are threaded wires on the edge of the occlusion disk, and this structure can help position the occlusion disk. It can also reduce edge leakage caused by the incompatibility between the occluder and the left atrial appendage wall and achieve complete closure of the left atrial appendage. The present invention reduces errors caused by the operator's subjective judgment of the release position of the occluder, and is applicable to left atrial appendages of different shapes, thereby facilitating the selection of surgical equipment.

Description

technical field [0001] The invention relates to a retractable and direction-adjustable left atrial appendage occluder, which is used for preventing stroke and other diseases caused by atrial fibrillation, and belongs to the field of medical devices. Background technique [0002] Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia, affecting approximately 2% of the global population. At present, there are about 10 million patients with atrial fibrillation in my country, and the incidence of atrial fibrillation among people over 60 years old is 1%, and it will increase with age. Stroke is one of the main causes of death and paralysis in patients with atrial fibrillation. Its clinical characteristics are sudden onset and serious risks, and the death and disability rate is higher than 50%. 90% of atrial thrombus in non-valvular disease and 60% of atrial thrombus in rheumatic mitral valve disease are formed in the left atrial appendage. The left atrial appe...

AI Technical Summary

Problems solved by technology

Although damage to the distal end of the left atrial appendage can be avoided to a certain extent, the cage-like structure cut out has little tension, and if the structure is too rigid, it will damage the left atrial appendage endothelium

In addition, the occluder lacks an occlusion disk, and instead adopts a cage structure, which leads to the combination of positioning and occlusion functions in the same structure, which cannot adapt to different shapes of left atrial appendages, which greatly increases the difficulty of occlusion

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