Left auricle occluder assembly capable of repeated contracting and releasing and intervention method thereof

Abstract

The invention discloses a left auricle occluder assembly capable of repeated contracting and releasing and an intervention method thereof. The assembly comprises a step-type saccule and an occluding amplatzer, a left auricle opening plugging part of the saccule is used for completely plugging a left auricle opening, and a left atrium anchoring part of the saccule is used for being connected to theleft atrium wall in a clamped mode and preventing the occluder from moving. The occluding amplatzer is released in the pericardium, and the rod part of the occluding amplatzer is connected and fixedto the saccule, so that the left auricle is squeezed and sealed between the saccule and the occluding amplatzer. According to the left auricle occluder assembly capable of repeated contracting and releasing and the intervention method, the left auricle opening is plugged by means of the saccule, the surface of the saccule is smooth, and the saccule is coated with anticoagulant coating; various types of left auricles can be blocked by means of the occluder assembly, thrombus formation can be prevented, and it is unnecessary to use an anticoagulant drug after operation.

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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