ASD (atrial septal defect) reserved-hole occluder

Abstract

The invention discloses an ASD (atrial septal defect) reserved-hole occluder comprising a left disc, a right disc, a cylindrical barrier portion and through hole penetrating the left disc, the right disc and a cylindrical. The left disc and the right disc are used for occluding an opening. The cylindrical barrier portion between the left disc and the right disc occludes the ASD. The diameter of the left disc is greater than that of the right disc. The diameter of the right disc is greater than that of the cylindrical barrier portion. The left disc, the right disc, the cylindrical barrier portion and the through hole are all made by braiding a plurality of memory alloy wires; the memory alloy wires penetrate the through hole to form a wall of the through hole and are wound into the left disc, the right disc and the cylindrical barrier portion; two ends of every memory alloy wire are both fixed to a same fixture used for restraining the memory alloy wires; the memory alloy wires are mutually staggered into an elastic mesh; a seal film is arranged in the elastic mesh. Branch flows of the aorta and pulmonary arteries are limited, volume overload and pressure conduction of pulmonary vessels are relieved, a release space is provided for high pressure of the right heart system, and patients with advanced pulmonary arterial hypertension are saved.

Description

technical field [0001] The patent of the present invention relates to the technical field of medical devices, in particular to an atrial septal defect occluder for treating congenital heart disease. Background technique [0002] Atrial septal defect (ASD) is a common congenital heart disease. It is the abnormality of the original atrial septum during embryonic development, resulting in a gap between the left and right atrium. ASD can occur alone or coexist with other types of cardiovascular malformations. It is more common in women, with a male to female ratio of about 1:3. Due to the presence of shunt at the atrial level, it can cause corresponding hemodynamic abnormalities. Most children with atrial septal defect with secundum septum are asymptomatic except that they are prone to cold and other respiratory infections, and their activities are not restricted. After the age of 40, the symptoms of most patients worsen, and pulmonary hypertension, arrhythmia and congestive h...

AI Technical Summary

Problems solved by technology

Multi-center studies at home and abroad have explored targeted drug therapy, which can improve the patient's symptoms to a certain extent, but the survival time has not changed. In addition, the cost of targeted drugs is expensive (such as 50,000 yuan per month for vetavir, and 50,000 yuan per month for bosentan. 30,000 yuan) long-term use is not realistic

[0003] A large number of left-to-right shunt pulmonary vessels in congenital heart disease have been irreversibly changed. Forcibly closing the defect will lead to nowhere to release the pressure of the right ventricle, resulting in right heart failure and sudden death, but letting the defect exist will further deteriorate the condition

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