Single-layer knitted umbrella-shaped cardiac septum occluder

Abstract

The invention discloses a single-layer knitted umbrella-shaped cardiac septum occluder, which comprises an elastic net, a joint and seal membranes. The elastic net is knitted by nickel-titanium wires; the middle part of the elastic net is provided with a cylindrical thin waist; both sides of the elastic net are respectively provided with a horn mouth-shaped left umbrella and a horn mouth-shaped right umbrella; the joint used for spinning a guide wire is welded in the cylindrical thin waist; and the two layers of seal membranes for obstructing blood flow are respectively sewed on respective outer side faces of the left umbrella and the right umbrella. The single-layer knitted umbrella-shaped cardiac septum occluder disclosed by the invention is good in shape memory function. Compared with a traditional occluder, the single-layer knitted umbrella-shaped cardiac septum occluder is reduced by 50 percent in weight. As the left umbrella and the right umbrella are respectively of a single-layer everted open structure, the hot-pressing bending process of the metal net is reduced, the long-term safety of an operation is enhanced, the occupied space of the occluder in a human body is reduced, and the risk that perienchyma is harmed by the occluder is reduced. According to the single-layer knitted umbrella-shaped cardiac septum occluder disclosed by the invention, as the seal membranes are sewed to cover the outer sides of the left umbrella and the right umbrella, sewing is simpler, more accurate and firmer.

Description

technical field [0001] The invention relates to a medical occluder, in particular to a single-layer braided umbrella-type cardiac septal occluder, which is mainly used for repairing congenital atrial and ventricular septal defects in interventional operations. Background technique [0002] Congenital heart disease Atrial septal defect and ventricular septal defect are common congenital heart diseases. The characteristic of atrial septal defect is that the interval between the left and right atria fails to close normally, and blood flows between the left atrium and the right atrium; Septal defects are characterized by the failure of the septum between the left and right ventricles to close properly, allowing blood to flow between the left and right ventricles. Because the pressure in the left atrium is higher than that in the right atrium, part of the blood from the left atrium is shunted to the right atrium through the atrial septal defect. Due to the leakage of blood, the...

AI Technical Summary

Problems solved by technology

[0005] At present, due to the structural problems of the occluder itself, the occluder is relatively large in size and heavy in weight, and takes up a lot of space in the heart, which affects the normal operation of the heart function.

On the other hand, there are many bending parts of the metal wires that make up the elastic mesh, so it is easy to break the wire mesh of the occluder during and after the operation, damage the patient's body tissue and form a local thrombus

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