Closure device

Abstract

The invention discloses a closure device. The closure device comprises a first closure disc, a second closure disc, a waist part connected with the first closure disc and the second closure disc and at least one fluffy silk thread bundle structure, wherein the silk thread bundle structures are arranged on at least one of the two opposite disc faces of the first closure disc and the second closure disc and are close to the waist part. As the silk thread bundle structures are arranged adjacent to the waist part, the closure device can stop a damaged opening after being implanted, so that blood flow can be effectively stopped from flowing into the damaged opening from one side of the damaged opening and / or flowing into the other side of the damaged opening from one side of the damaged opening through the damaged opening, and residual bypass flow is avoided. In addition, the silk thread bundle structures are of a fluffy structure, the gap space in the silk thread bundle structures is filled with the blood flow flown in easily to form a seal structure, blood detained in the fluffy structure is prone to thrombus formation, the seal structure can be compacted further, the function of stopping the blood flow is enhanced, extra closure materials are not needed, and the biological risk after implantation is reduced.

Description

technical field [0001] The present invention relates to a medical instrument, in particular to an instrument for occluding passages, defects or openings in the human body, which can be applied to occluders for patent foramen ovale (PFO), and can also be used to occlude patent ductus arteriosus, Atrial septal defect, ventricular septal defect, etc. Background technique [0002] With the continuous development of interventional devices and interventional cardiology, transcatheter interventional occluder minimally invasive treatment of atrial septal defect, ventricular septal defect, patent ductus arteriosus and patent foramen ovale and other congenital heart diseases has become an important method. Endovascular occlusion with interventional methods is also a widely accepted treatment. [0003] see figure 1 , the existing occluder 1 usually includes a first occlusion disk 11, a second occlusion disk 12, and a waist 13 connecting the first occlusion disk 11 and the second occl...

AI Technical Summary

Problems solved by technology

If the radial dimension of the waist 13 of the occluder is large, or the flexibility of the waist 13 is poor, it is difficult for the waist 13 to deform autonomously according to the shape of the PFO channel, and it is easy to cause the first occlusion disc 11 and / or the second occluder to deform. The blocking disk 12 cannot be completely attached to the tissue wall, so a gap is formed between the disk surface and the tissue wall, which becomes a channel for residual shunt

For small residual shunts, the defect 2 may still eventually occlude as the endothelial cells gradually grow; however, for larger residual shunts, blood flow through the defect 2 will cause changes in blood flow velocity, which can induce thrombosis For this reason, patients need to prolong the time of anticoagulation therapy. If the formed thrombus enters the blood circulation, it may also cause serious adverse events such as embolism.

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