Oval hole unclosed plugging device capable of clamping atrial septum expansive tumors and preparation mold

Abstract

The invention discloses an oval hole unclosed plugging device capable of clamping atrial septum expansive tumors and a preparation mold. According to the plugging device, an upper flanging part is integrally formed on the edge of an upper connecting part, and a lower flanging part is integrally formed on the edge of a lower connecting part; and the upper flanging part and the lower flanging part are respectively flanged and extended towards the direction close to each other. Only the lower surface of the lower disc is provided with nut fixing braided wires, and the upper surface of the upper disc is not provided with a nut structure. And Parylene C is used for carrying out film coating treatment on the surface of the nickel-titanium wire. According to the plugging device, the surrounding area is more obvious in sealing effect, and the expansion tumor is pressed. The parylene coating process solves the problem of nickel ion precipitation allergy, and the single rivet nut process achieves the effect of reducing thrombus. According to the preparation mold of the oval hole unclosed plugging device capable of clamping and closing the atrial septum expansion tumor, the edge of the middle mold extends out of the edge of the upturned edge part of the upper disc. According to the preparation mold, the heat transfer effect is more balanced, the product heat setting efficiency is improved, and the product heat setting time is shortened.

Description

technical field [0001] The present invention relates to the structural design of a patent foramen ovale occlusion device for interventional surgery, and the technical field of structural design of molds used for the preparation of the occlusion device, in particular to a patent foramen ovale closure capable of clamping atrial septal swelling The device and the patent foramen ovale occlusion device that can clamp the atrial septal swelling tumor were used to prepare the mold. Background technique [0002] With the continuous development of interventional materials and devices and interventional cardiology, transcatheter (controllable sheath) interventional occluder minimally invasive treatment of atrial septal defect (VSD), ventricular septal defect (ASD), patent ductus arteriosus (PDA) and Congenital heart disease such as patent foramen ovale (PFO) has become an important method. Endovascular occlusion with interventional methods is also a widely accepted treatment. [000...

AI Technical Summary

Problems solved by technology

However, nickel element is toxic, and it is easy to penetrate into the human body in long-term contact with human body fluids, resulting in defects that seriously affect human health.

Moreover, due to the different constitutions of patients, some patients are allergic to nickel alloys, which makes it impossible to use nickel alloy occluders at all.

In addition, the existing products also have clinical problems such as poor lamination of the disc surface, incomplete endothelialization, thrombosis, residual shunt, etc., which still need to be improved

[0004] It can be seen that the occluders in the prior art are prone to: postoperative residual shunt, poor fit between the disc surface and the atrial septal tissue, incomplete endothelialization, and adverse phenomena of reducing thrombus formation

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