a blocking device

Abstract

The present invention provides a occlusion device, which is a mesh structure woven by shape memory wires, the mesh structure includes a columnar support part and at least one flow blocking disc, and the flow blocking disc passes through the columnar twisting part Connected with the support part, the diameter of the torsion part is smaller than the diameter of the support part and the choke disk, the choke disk and the support part are provided with a choke film, the choke disk or the support part Connecting joints are provided on the outer end surface, and the network structure is woven by alternating thick wires and thin wires. The thick wires are evenly arranged along the perimeter direction of the network structure, and there is a At least one filament. The present invention adopts the combination of thick wire and thin wire to weave the plugging device, which not only effectively guarantees the delivery effect, but also ensures the memory rebound performance; in addition, the present invention can achieve a stretching effect to a certain extent, so it can be used according to The lesion is regulated, and the applicability is good.

Description

technical field [0001] The invention relates to a medical device, in particular to a blocking device for a patent ductus arteriosus. Background technique [0002] Interventional therapy is a minimally invasive treatment using modern high-tech means, that is, under the guidance of medical imaging equipment, special catheters, guide wires and implanted medical devices are introduced into the human body to diagnose and locally treat lesions in the body . Implantable medical devices include occlusion devices, vena cava filters, coils, stents, etc. [0003] The occlusion device is a medical device used to treat atrial septal defect (ASD), ventricular septal defect (VSD), patent ductus arteriosus (PDA) and other diseases of structural heart disease. According to different diseases, the structure of the occlusion device is also different. Among them, the occlusion device usually used in patent ductus arteriosus (PDA) surgery is mainly composed of a cylindrical part and a disc, an...

AI Technical Summary

Problems solved by technology

However, due to the different shapes of patent ductus arteriosus defects, especially on the high-pressure side, the discs of traditional patent ductus arteriosus occlusion devices do not fit tightly with the defect, which affects the occlusion effect of the occlusion device; at the same time, The traditional occlusion device can only be placed into the defect from the side of the pulmonary artery. For children, the traditional occlusion device restricts the surgical path and causes trouble to the operation.

In order to solve the above problems, technicians proposed some solutions: 1. Use a delivery sheath with a smaller size to deliver the occlusion device, but this will affect the delivery effect, resulting in unsmooth delivery and increasing the operation time; 2. Use a delivery sheath with a larger diameter. A small nitinol wire braided occlusion device can be delivered in a small-sized sheath, but this will affect the memory rebound performance due to insufficient hardness, and cannot achieve a good effect of blocking blood

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