Membrane-free partially degradable left atrial appendage occluder

Abstract

The invention relates to a membrane-free partially degradable left atrial appendage occluder, and belongs to the technical field of medical instruments. The occluder comprises an upper disc surface, a bracket body and a lower disc surface, a bracket body is arranged between the upper disc surface and the lower disc surface; the plugging device is cylindrical or drum-shaped; and the upper disc surface is of a closed structure. Due to the closed plug type design, the oppression of the plugging device on the peripheral structure tissue of the left auricle is reduced; complications caused by auricle puncture are reduced; and the requirement for the depth of the implanted left auricle is low, and the application range is wide. The occluder is woven with a dense net, the effect of blocking blood flow is achieved, a traditional flow blocking film is replaced, the occluder can pass through a smaller conveying sheath, and iatrogenic atrial septal defects are avoided. The degradable high polymer material is adopted, so that the metal implantation amount of the left auricle plugging device and the load on the heart of a patient are reduced. Through the design of the forming ring in the plugging device, the radial supporting force of the plugging device is enhanced, and the stability of the plugging device in the body is improved.

Description

technical field [0001] The invention relates to a partially degradable left atrial appendage occluder without a membrane, which belongs to the technical field of medical instruments. Background technique [0002] According to survey data, stroke has become the leading cause of death among Chinese people, and China is one of the countries with the highest proportion of stroke risk factors in the world. There are 10.3 million new stroke patients worldwide every year. The latest statistics in my country show that the annual prevalence of stroke in China is 1114.8 / 100,000, and the mortality rate is 114.8 / 100,000. In view of the high disability rate, high mortality rate and easy recurrence of stroke, understanding and preventing stroke is of great significance to the world, especially China. [0003] According to the Global Burden of Disease (GBD) study in 2013, more than 90% of strokes are caused by modifiable risk factors, and more than 75% of stroke patients can reduce their ...

AI Technical Summary

Problems solved by technology

For example, the covering plate of the cover-type occluder will cause abrasion to the ridge around the left atrial appendage and the mitral annulus, causing edema; incomplete covering and closure will lead to residual leakage; excessive internal load of the left atrial appendage will compress the left-circulating coronary artery , leading to complications such as myocardial ischemia

The above-mentioned complications rarely occur in the plug-type left atrial appendage occluder. Because the distal end (near the tip of the left atrial appendage) of the plug-type left atrial appendage occluder is designed with openings, there is a risk of cardiac tamponade caused by atrial appendage puncture. When using, Affected by the depth of the atrial appendage structure, for the shallow left atrial appendage, the open-type plug-type occluder is relatively not the most preferred

On the other hand, the specifications of the delivery sheaths used in the plug-type occluders that are currently on the market in China are all 14F, and the aperture caused by atrial septal puncture is relatively large, which is prone to iatrogenic atrial septal defect

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