left atrial appendage occluder

Abstract

A left atrial appendage occluder, comprising an occlusion disc (106) and an anchor disc (101) connected to the occlusion disc (106), the occlusion disc (106) is in a mesh structure, and a flow blocking membrane (106) is arranged inside. 108), the distal end of the blocking disc (106) is fixed with a tubular member (109); the tubular member (109) is provided with a plurality of support rods (102) relative to the other end of the fixed blocking disc (106). The support rod (102) is issued from a direction relative to the blocking disc (106), and the proximal end (102b) of the support rod spans the center of the tubular member (109) to the opposite side, and a plurality of the support rods (102) are arranged in a cross-radial shape to form The anchoring disc (101), the included angle between the proximal end (102b) of the support rod and the central axis of the tubular member (109) forms a specific angle. The occluder may also contain a modified flow blocking membrane to improve biocompatibility, rapid endothelialization, and reduce thrombosis. The left atrial appendage occluder has a good effect of blocking outflow of thrombus in the left atrial appendage, can be positioned repeatedly, has stable fixation and has good fatigue resistance.

Description

technical field [0001] The invention relates to an implantable medical instrument, in particular to a left atrial appendage occluder which has good effect of blocking outflow of thrombus in the left atrial appendage, can be positioned repeatedly, is fixed stably, and is fatigue-resistant. Background technique [0002] At present, with the development of interventional devices, many diseases that cannot be treated by surgical operations have been cured. Compared with surgical treatment, interventional therapy has less trauma, faster recovery and better curative effect. After nearly half a century of development, interventional therapy has developed rapidly, and various interventional medical device products have also been produced. Make more and more cures and patients get treatment. [0003] Atrial fibrillation (AF) is one of the most common arrhythmias. In addition to the discomfort caused by palpitations, the occurrence of complications such as thromboembolism is the mos...

AI Technical Summary

Problems solved by technology

However, the anchoring thorns piercing the left atrium are repeatedly positioned, and when the occluder is recovered, it will be stuck on the edge of the sheath wall, making the occluder unable to be recovered, and repeated positioning

Moreover, the fixed plate of this hybrid left atrial appendage occluder usually deforms greatly to reverse the direction of the anchoring spines, causing the tension and deformation of the fixed plate to reach the limit value of the material

This device has poor fatigue strength in permanent implantation, and is prone to breakage, puncturing other tissues such as the heart, and endangering life

[0008] In addition, CN104352261A discloses a left atrial appendage occluder with an improved structure. The connecting plate provides support for the anchoring plate to form a rigid structure, so that the deformation is large and the processing is difficult. In addition, the planar structure of the anchoring plate is stable during the opening and recovery process. If it is larger than the diameter of the anchoring disc, it is easy to puncture other tissues such as the heart and endanger life. The schematic diagram of its opening is as follows Figure 11 shown

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