Congenital heart disease transcatheter closure device

Abstract

The invention discloses a congenital heart disease transcatheter closure device. The congenital heart disease transcatheter closure device comprises an H-shaped stent, wherein the H-shaped stent is woven by a nickel-titanium alloy screen mesh of which the diameter ranges from 0.0031-0.0033 cun; a plurality of convex particles are respectively arranged on two outer sides of each of the upper end and the lower end of the H-shaped stent; the H-shaped stent is filled with polyester fibers; a layer of polyurethane foam coats metal wires of the H-shaped stent; preferably, the H-shaped stent is made of TiNi shape memory alloy; the diameter of the H-shaped stent ranges from 0.0031 to 0.0035 optionally; and preferably, a layer of polyacrylic ester adhesive coats the metal wires of the H-shaped stent. On the basis of an animal test, the metal toxic and side effect of the congenital heart disease transcatheter closure device is much lower than that of the traditional congenital heart disease transcatheter closure device, chronic injury and mechanical irritation on blood vessels are quite low, and side effects such as cardiac insufficiency and arrhythmia of patients do not exist.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a congenital heart disease blocking device. Background technique [0002] Patent ductus arteriosus, atrial septal defect, and ventricular septal defect are relatively common congenital heart diseases in children, and these three account for about 80% of the entire congenital heart disease. Before the 1970s, the means of closure mainly relied on surgical operations; in the mid-1970s, researchers began to design and try a new non-thoracotomy method for closing the ductus arteriosus and atrial septal defect with success. Over the past 20 years, there have been various The occlusion device is suitable for animals and has achieved great success in clinical trials; at present, mushroom or double-disc umbrella-shaped occlusion devices are more mature in clinical use, which are relatively convenient to operate, but due to the excessive metal content of the device, Mo...

AI Technical Summary

Problems solved by technology

Before the 1970s, the means of closure mainly relied on surgical operations; in the mid-1970s, researchers began to design and try a new non-thoracotomy method for closing the ductus arteriosus and atrial septal defect with success. Over the past 20 years, there have been various The occlusion device is suitable for animals and has achieved great success in clinical trials; at present, mushroom or double-disc umbrella-shaped occlusion devices are more mature in clinical use, which are relatively convenient to operate, but due to the excessive metal content of the device, Moreover, the metal is in direct contact with the body, so it is difficult to determine the long-term toxic and side effects of the metal in the body. If the metal is too hard, it will easily cause chronic damage to blood vessels and mechanical stimulation, resulting in long-term cardiac insufficiency, arrhythmia and other side effects.

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