patent ductus arteriosus occluder

Abstract

The invention discloses a plugging device for an unclosed hole of a patent ductus arteriosus. The perforated plugging device for the unclosed hole of the patent ductus arteriosus comprises a front disk for plugging a gap, a cylindrical barrier part for blocking an unclosed ductus, and a through hole penetrating through the front disk and the cylindrical barrier part; one end of the cylindrical barrier part is connected with the front disk; the other end of the cylindrical barrier part is a closed end; the diameter of the front disk is greater than that of the cylindrical barrier part; the front disk, the cylindrical barrier part and the through hole are all formed by weaving a plurality of memory alloy wires; the memory alloy wires penetrate through the through hole to form the hole wall of the through hole and are wound to form the front disk and the cylindrical barrier part; the two ends of the memory alloy wires are fixed to the same fixing clamp for restricting the memory alloy wires; the memory alloy wires are interwoven to form an elastic mesh; a sealing film is arranged in the elastic mesh. According to the perforated plugging device for the patent ductus arteriosus, the shunt of aorta-pulmonary artery is limited, and the blood flow of the aorta of a high-pressure chamber is also prevented from flowing to the pulmonary artery; the volume overload and the pressure transfer of pulmonary vessels are lightened; serious consequences caused by sudden rise of the pulmonary artery pressure can also be prevented, so that the high pressure of a right heart system has release space.

Description

technical field [0001] The patent of the present invention relates to the technical field of medical devices, in particular to a non-occluded ductus arteriosus occluder for treating congenital heart disease. Background technique [0002] Patent ductus arteriosus (Personal Digital Assistant, PDA) is a common congenital heart disease characterized by abnormal communication between the aorta and pulmonary artery that fails to close normally. Because the pressure in the aorta is much higher than the pressure in the pulmonary artery, a lot of blood flows from the aorta to the pulmonary artery. PDA with a small diameter has little effect on human hemodynamics due to the limited blood shunt, so it may not be treated. PDAs with medium or large diameters will cause a large amount of blood to flow to the lungs, resulting in an overload of the left heart system, left ventricular hypertrophy, left heart failure, and gradually appear right ventricular hypertrophy, pulmonary hypertension...

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

[0005] 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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