Heart septal defect blocking device

Abstract

The present invention is a defect occludes of the heart interval. The main body is a metal supporting net with a predetermined extended shape. The front end is provided with a left disk and the back end is provided with a right disk. A blockage is arranged close to the center of the left disk and the right disk, which blocks the metal supporting net. The blockade is connected with the metal supporting net firmly. The blockade in the left end or the blockade in both ends is reversely packaged in the blocked metal supporting net. No blockage or no distinct groove is in outer disk of the reversely packaged blockage, which is approximately plane-shaped. A layer of outsourcing choked flow membrane is arranged in outer surface of the left disk and the right disk. The choked flow membrane is connected with outer surface of the left disk firmly. The present invention removes damage of the blockage to the surrounding tissue of the heart, which also reduces ways influencing the blood flow. The present invention is beneficial for promoting endothelial growth; also the present invention reduces thrombus formation rate and release of the metal element harmful to human body. The present invention is applicable for congenital heart disease comprising patent foramen ovule (PFO), patent ducts arteriosus (PDA), atrial septal defect (ASD) and ventricular septal defect (VSD).

Description

technical field [0001] The invention relates to a medical device, in particular to a cardiac septal defect occluder for treating congenital heart disease. Background technique [0002] Congenital heart disease includes patent ductus arteriosus (PDA), patent foramen ovale (PFO), atrial septal defect (ASD), and ventricular septal defect (VSD). PDA may cause blood to flow between the aorta and pulmonary artery, PFO and ASD may cause blood to flow between the left and right atrium, and VSD may cause blood to flow between the left and right ventricles. . Currently, there are various types of cardiac septal defect closure devices for the treatment of congenital heart disease. These closure devices are delivered to specific locations of the patient's heart through catheters or wires through the femoral vein or jugular vein. [0003] Several mechanical occlusion devices have been proposed in the past for sealing congenital heart defects. The most representative examples of which ...

AI Technical Summary

Problems solved by technology

However, the heads of the left and right discs of the metal support net protrude outside the left and right discs of the metal support net 1, such as Figure 1A , 1B , 1C, and 1D; the left disk head 4 of the occluder will enter the aorta (for PDA), left atrium (for PFO, ASD) and left ventricle (for VSD) in a protruding state, and the head may touch Touch or damage the surrounding tissues (such as the left pulmonary vein ostium of the left atrium, the coronary sinus ostium and the aortic valve of the left ventricle and other structures in the heart), causing serious injury; because the end cap 4 and the end cap 5 are outside the metal support net 1, In order to reduce the damage of the head to the surrounding tissues of the heart, some of the heads are indented into a preset groove. Even if there is a groove, the head is in the groove in the state of free expansion, but when the occluder When the left disc was just released from the sheath tube 8, the sealing head still protruded outside, as Figure 1E , and the groove can only be made in the PDA occluder with a large distance between the left and right discs, but it cannot be made in the VSD occluder with a distance of only about 2mm between the left disc 2 and the right disc 3, so it does not fundamentally solve the problem of the head protruding hazards, and the grooves in the disc surface have the potential to affect the way blood flows

At the same time, it is difficult to accurately determine the size and shape of the defect hole under the existing technical conditions and operating methods. Due to the limitation of the waist size, it is more difficult for doctors to choose the type of occlusion device. If the size is too large, the waist of the occluder will be blocked. Compression of the heart compartment makes the left and right disks bulge into a gourd shape, making the head outside the metal support net more prominent, which may touch the surrounding tissues and cause serious consequences

In addition, there is a flow-blocking film inside the metal support net, and the entire metal support net of the left and right discs is completely exposed to the blood, which is likely to cause the formation of thrombus and the release of harmful metal elements, which will affect the surgical effect.

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