Plugging device, plugging system and knotting method of tightening piece in plugging device

Abstract

The invention provides a plugging device, which is used for plugging defects in a vasculature, the plugging device comprises two plugging discs and a tightening piece, and the two plugging discs are used for covering different openings of the defects; the tightening piece comprises a tightening line, the tightening line is used for being arranged in the defect in a penetrating mode and connecting the two plugging discs, and the length of the part, between the two plugging discs, of the tightening line can be adjusted through the free end of the tightening line. The invention further provides a plugging system provided with the plugging device and a knotting method of the tightening piece in the plugging device.

Description

technical field [0001] The present invention relates to the field of medical devices, in particular to an occluder for occluding defects in the human body, an occluder system, and a knotting method for the waist of the occluder. The occluder can block the foramen ovale, It can also be used to block patent ductus arteriosus, atrial septal defect, ventricular septal defect, etc. Background technique [0002] The foramen ovale is generally closed in the first year after the birth of the fetus. If the foramen ovale is still closed in children older than 3 years old, it is called patent foramen ovale (Patent Ova lForamen, PFO). In adults, 20% to 25% of the eggs The hole is not completely closed. Patent foramen ovale refers to a deformity in which the primary and secondary diaphragms in the fossa ovalis are not fully fused, and there is a permanent gap-like defect in the middle, which leads to atrial shunt. [0003] With the advancement of science and technology, especially the ...

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Problems solved by technology

[0004] However, the patent foramen ovale occluder in the prior art is only suitable for treating the patent foramen ovale with a relatively short overlapping of the primary septum and the secondary septum, and it is difficult to treat the patent foramen ovale with a relatively long overlap. After treatment, there is a large residual shunt between the primary diaphragm and the secondary diaphragm. When the blood flows through the foramen ovale, the blood flow rate will change, which can induce thrombus formation. During coagulation treatment, if the formed thrombus enters the blood circulation, it may also cause serious adverse events such as embolism; moreover, the distance between the double-disc occlusion surfaces of traditional occluders is fixed, and the waist cannot be adjusted according to the structure of the foramen ovale. distance, so that the occluder conforms to the anatomical structure of the foramen ovale

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