Blocking device of heart atrial, ventricular septal defect and patent oval foramen

Abstract

The invention discloses a choking device of atrium and ventricular septal defects and patent foramen ovale, which is safe and convenient for operation release, comprising a front tray 1 and a rear tray 2 which are approximate mushroom-shaped and composed of a plurality of metal wires, the front tray 1 and the rear tray 2 can hold the opening of atrium and ventricular septal defects and patent foramen ovale, especially, the metal wire extended by the front tray 1 and the metal wire extended by the rear tray 2 are all fixed by a rear chucking appliance on the outer surface of the rear tray 2, the rear chucking appliance 3 has screw threads connected with a conveyor, the structure of the invention is reasonable, especially a lumbar part formed by being braided with the front tray and the rear tray together recorded in the existing technology is not provided between the front tray and the rear tray, and the front tray and the rear tray are all composed of separate a set of metal wires, so the interactive pull force of the existing technology is not provided between the front tray and the rear tray. Accordingly, after the front tray is released from the tube of the conveyor, the maximum size state can be reached rapidly.

Description

Technical field: [0001] The invention relates to a medical device, in particular to a blocking device for cardiac atrium, ventricular septal defect and patent foramen ovale in interventional treatment. Background technique: [0002] The heart and lung organs of the human body are proportional to the population. Some people have congenital defects of the heart and lung organs, such as atrial septal defect (ASD), ventricular septal defect (VSD) and patent foramen ovale (PFO). Open surgery is required for suture treatment. In recent years, with the maturity and development of interventional treatment methods, a tubular delivery device is generally used to send a nitinol wire braided blocking device into the atrioventricular septal defect to block the defect. After a period of time, thrombus is formed and form the cell cortex. The more mature development in the prior art is the occlusion device designed and produced by AGA Pharmaceutical Co., Ltd. in the United States, specifi...

AI Technical Summary

Problems solved by technology

This will cause a misjudgment by the doctor when placing the blocking device, thinking that the size of the blocking device does not match, taking out the delivery device and the unreleased blocking device from the human body, replacing it with a new blocking device of a different size and then inserting it. Repeated operations increase the risk of surgery. Due to the imperfect structural design of existing blocking devices, the size of the blocking device is deployed too late. Therefore, the size of the blocking device may not match the size of the patient's defect opening. First, it causes repeated operations. The second is that improper size fit may cause the blocking device to loosen. The third is that the axial size of the incompletely deployed blocking device is also relatively large, and repeated axial pulling will easily cause damage to the heart.

In addition, the existing blocking devices are all integrally woven by very fine nickel-titanium memory alloy wires, wherein the front disc mainly plays a blocking role, and the rear disc mainly plays a clamping role. There is a polyester film on the waist to act as a blocker. The clamping force of the thin metal wire is small, the stability is poor, and the production cost is high. How to avoid the above defects and improve the atrial septal defect is an urgent problem to be solved.

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