Ventricular septal defect hole occluder

Abstract

The invention discloses a hole-retaining occluder for ventricular septal defect, which comprises a left disk and a right disk for blocking the gap, and a frustum-shaped blocking part located between the left and right disks to block the ventricular septal defect, and the diameter of the frustum-shaped blocking part is relatively small. The large end is connected to the left disk, and the through hole that runs through the above-mentioned left disk, right disk and the frustum-shaped blocking part; the diameter of the left disk is equal to the diameter of the right disk, and the diameter of the left disk is greater than the diameter of the frustum-shaped blocking part; The right disk, the frustum-shaped blocking part and the through hole are all formed by a plurality of memory alloy wires; the memory alloy wire passes through the through hole to form the hole wall of the through hole, and is wound to form the left disk, the right disk and the frustum-shaped blocking part. Both ends of the memory alloy wire are fixed on the same fixture that constrains the memory alloy wire; multiple memory alloy wires are interlaced to form an elastic net, and a sealing film is arranged inside the elastic net. The aortopulmonary artery shunt is limited, and the volume overload and pressure transmission of the pulmonary vessels are reduced, so that the high pressure of the right heart system has room to release.

Description

technical field [0001] The patent of the present invention relates to the technical field of medical devices, in particular to a ventricular septal defect occluder for treating congenital heart disease. Background technique [0002] Ventricular septal defect (VSD) refers to the incomplete development of the ventricular septum during the embryonic period, which forms abnormal communication and produces a left-to-right shunt at the ventricular level. Ventricular septal defect is the most common congenital heart disease, accounting for about 20% of congenital heart disease, can exist alone or coexist with other malformations. The disease consequences depend on the left-to-right shunt generated at the ventricular level, the amount of which depends on the size of the defect. If the defect is large, the blood flow in the pulmonary circulation will increase significantly, and flow back into the left atrium and ventricle, which will increase the load of the left heart and the left ...

AI Technical Summary

Problems solved by technology

[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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