Plugging device

Abstract

The invention discloses a plugging device. The plugging device comprises at least one disc-shaped structure and a waist part connected with the disc-shaped structures, wherein the waist part comprises at least one wavelike ring, and the central axis of each wavelike ring is parallel to that of each disc-shaped structure. Because the waist part is provided with the wavelike rings, when the waist part is stressed with radial acting force, the wavelike structures of the wavelike rings act on the waist part in the radial direction so that the radial acting force can be transmitted in the peripheral direction of wavelike bodies, namely, the wavelike rings, thus, the perimeter of the waist part can be kept unchanged fundamentally under the radial acting force, axial tension is reduced as much as possible, even a coloboma part with an irregular section shape can be well attached to the wall of the plugging device, a gap between the waist part and the coloboma part can be reduced as much as possible, accordingly, residual shunts can be reduced, and the plugging effect can be improved.

Description

technical field [0001] The invention belongs to the technical field of medical instruments, in particular to an occluder. Background technique [0002] With the continuous development of interventional materials and instruments and interventional cardiology, minimally invasive treatment of congenital heart diseases such as atrial septal defect, ventricular septal defect, patent ductus arteriosus and patent foramen ovale by using catheter occluder has become an important method . Endovascular occlusion by interventional methods is also a widely accepted treatment. [0003] The occluder disclosed in the Chinese patent document whose application number is CN97194488.1 is as figure 1 As shown, the occluder 300 includes a plug head 310, a sealing head 308, a left disc 302, a right disc 304, and a waist 306; the left disc 302, the right disc 304, and the waist 306 are braided by multiple metal wires. During the preparation process, each metal wire forms two groups of metal wire...

AI Technical Summary

Problems solved by technology

Therefore, after the occluder is implanted into the human body, the waist 51 cannot conform to the cross-sectional shape of the irregular defect, which will cause a certain residual shunt and affect the occlusion effect.

[0009] It can be seen from the above that although the occluders of the above various structures can easily enter the delivery sheath which is much smaller than its diameter, and realize the occlusion of the cardiac septal defect or blood vessel after release, but in the occlusion Defects with irregular cross-sections whose waists cannot ensure that their circumference remains basically unchanged to conform to defects with irregular cross-sections

When the waist of the occluder with the above structure is subjected to a force in the direction of the maximum inner diameter, the size of the waist at the stressed part will shrink toward the inner diameter, but the size of the non-stressed or less stressed part will either shrink at the same time or remain In other words, the circumference of the waist is relatively reduced after being stressed, so that the waist of this type of occluder cannot fit the defect site completely, and there is a gap between the occluder and the defect site after implantation, thus forming a residual shunt and affecting the operation. Blocking effect

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