Distance-adjustable left aurcle plugging device

Abstract

The invention discloses an distance-adjustable left aurcle plugging device. The distance-adjustable left aurcle plugging device includes an anchoring device and a sealing disc which are separately arranged. The anchoring device is connected with a pulling cable penetrating through the sealing disc, and the sealing disc is provided with an anti-disengaging member acting on the sealing disc. The anti-disengaging member is fixedly connected with the sealing disc or is integrally formed with the sealing disc or is connected with the sealing disc in an abutted mode. The pulling cable is connected with the axle center position of the anchoring device, and the sealing disc is provided with a through hole used for allowing the pulling cable to penetrate through. The through hole is located at the axis position of the sealing disc, the pulling cable is of a flexible structure, and one pulling cable is arranged or a plurality of pulling cables are arranged side by side. The provided distance-adjustable left aurcle plugging device can adjust the distance between the anchoring device and the sealing disc based on the shape of the left aurcle, so that the sealing disc can completely block the left atrium and the left auricle.

Description

technical field [0001] The invention relates to the field of interventional medical devices, in particular to an adjustable distance left atrial appendage occluder. Background technique [0002] The occluder is used as an implant in interventional therapy for the treatment of congenital heart diseases such as atrial septal defect, ventricular septal defect and patent ductus arteriosus, as well as for the treatment of patients with atrial fibrillation. Currently clinical occluders include atrial / ventricular septal defect occluders, left atrial appendage occluders, etc. [0003] Existing occluders all adopt an integrated design, and when in use, each disc body cannot be selected according to the difference in the position and size of the patient's focus, and the distance between each disc body of the occluder cannot be adjusted. [0004] Studies have confirmed that more than 90% of thrombi in patients with non-valvular atrial fibrillation form in the left atrial appendage, an...

AI Technical Summary

Problems solved by technology

The double-disk occluder of this technical solution is not significantly different from the conventional occluder, but the anchoring area of ​​the left atrial appendage is increased by implanting a metal stent to prevent the occluder from falling off, but the anchor cannot be adjusted according to the anatomical structure of the left atrial appendage. The distance between the fixed disk and the sealing disk, the double-disc occluder can move freely in the axial direction between the proximal end surface and the distal end surface of the metal stent, which will cause the waist of the double-disc occluder to be too long or too short , the occluder is deformed after deployment, resulting in poor sealing of the sealing disc

At the same time, the ideal implantation state of the sealing disc and the anchoring disc in this technical solution is when the two are parallel, but in the actual use process, the sealing disc or the anchoring disc will be deformed to a certain extent, or the sealing disc and the anchoring disc will be deformed to a certain extent. There will be a torque at the connection position, once this happens, it will reduce the effectiveness and reliability of the device

[0007] In the above technology, the distance between the anchoring disk and the sealing disk is fixed and not adjustable. At the same time, the sealing disk and the anchoring disk are rigidly connected. However, due to individual differences, each patient’s tissue defect or need to be blocked The position and shape are different, and the fixed distance and rigid connection are often not well adapted to complex and changeable clinical needs. For example, taking the left atrial appendage occluder as an example, the implantation position of the anchoring disc has an If the anchoring disc is implanted too deeply, the sealing disc will be squeezed and deformed, and the edge will be lifted, resulting in residual shunt. If the entry is too shallow, the sealing disc cannot adhere to the atrial wall, and it will also cause residual shunt

[0008] If you encounter the above-mentioned situation where the release position of the anchor plate is improper, you need to take out the anchor plate and select the release position again, but the anchor plate generally has barbs to prevent it from falling off. Repeated removal and release of the anchor plate will make the anchor The barbs on the plate cause damage to the inner wall of the left atrial appendage or the plaque falls off, forming a thrombus, which not only prolongs the operation time, increases the pain of the patient, but also increases other iatrogenic risks

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