A repeatable retractable left atrial appendage occluder assembly and intervention method thereof

Abstract

A refoldable left atrial appendage occluder assembly and its intervention method, the assembly includes a stepped balloon and an occluding umbrella, the left atrial appendage opening filling part of the balloon is used to completely fill the left atrial appendage opening, the balloon The anchoring part of the left atrium is used for clamping on the wall of the left atrium to prevent the displacement of the occluder. The occluding umbrella is released in the pericardium, and is fixed by connecting and fixing the stem of the occluding umbrella with the balloon, squeezing and sealing the left atrial appendage between the balloon and the occluding umbrella. The present invention uses a balloon to occlude the opening of the left atrial appendage. The surface of the balloon is smooth and coated with an anticoagulant coating. Using the occluder assembly of the present invention can occlude various types of left atrial appendages and prevent thrombus formation. No need for anticoagulants.

Description

technical field [0001] The invention belongs to the field of biomedical devices, and in particular relates to a replaceable left atrial appendage occluder assembly and an intervention method thereof. Background technique [0002] Left atrial appendage occlusion is to place the occluder in the delivery sheath and transport the occluder to the opening of the left atrial appendage through minimally invasive puncture of the interatrial septum to block the left atrial appendage, isolate the left atrium and the left atrial appendage, and avoid thrombus in the left atrial appendage Into the blood circulation, to avoid the stroke caused by atrial fibrillation and other phenomena. [0003] The occluder in the prior art usually sends the occluder umbrella into the opening of the left atrial appendage to completely close the opening of the left atrial appendage, and a occluder plate is designed behind the occluder umbrella to prop up the wall of the left atrial appendage, thereby fixin...

AI Technical Summary

Problems solved by technology

[0003] The occluder in the prior art usually sends the occluder umbrella into the opening of the left atrial appendage to completely close the opening of the left atrial appendage, and a occluder plate is designed behind the occluder umbrella to prop up the wall of the left atrial appendage, thereby fixing the occluder umbrella. For example, the prior art application number is 201610885243.7, the name is the left atrial appendage occluder, and the patent literature with the application number 201410528043.7, the name is the left atrial appendage occluder, the outer surface of the occlusion umbrella needs to have barbs, and The structure of the umbrella plate is made of metal mesh. figure 1 It is a structural schematic diagram of an occluder in the prior art, figure 1 There are many disadvantages in the structure of the auricle: 1. There are strict requirements on the shape of the auricle, and many patients have failed or incomplete closure due to irregular lobes of the auricle and insufficient depth of the auricle.

2. In order to reduce the falling off of the occluder, most of the existing occluders are designed with barbs on the occluder. After the occluder is released, the barbs are inserted into the left atrial wall to play a stabilizing role. However, due to the insertion of the barbs The depth and direction are uncontrollable, and it is easy to penetrate the atrial wall and cause pericardial effusion

3. Existing occluders use a large area of ​​nickel-titanium alloy framework to contact the flowing blood. In order to prevent thrombus, a large number of anticoagulant drugs must be used for half a year after surgery, and patients receiving left atrial appendage occlusion are precisely combined with anticoagulation. Patients with contraindications or poor anticoagulant effect

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