A Novel Device Release Device for Implantation

Abstract

The invention relates to a novel device for implanting instruments, which comprises a spreading rod, a spreading rod operating part, a control rod, a moving rod and a moving rod operating part, the spreading rod is a hollow tube, and the spreading rod The distal part of the extension rod can be bent as a whole or in part, the proximal end of the expansion rod is fixedly connected with the operation part of the expansion rod, one end of the control rod is connected to the distal part of the expansion rod, and the other end of the control rod is connected to On the distal part of the moving rod, the proximal end of the moving rod is fixedly connected with the moving rod operating member, and moving the moving rod operating member relative to the spreading rod operating member can realize the spreading The closing and opening of the rod, the release device also includes an anchor needle and an anchor needle push rod, the anchor needle and the anchor needle push rod are arranged in the expansion rod, and the anchor needle The distal end of the push rod is located proximal to the anchor pin. The invention can controlly release the implanted instrument connected thereto, which is beneficial to accurate positioning and improves the success rate of operation.

Description

Technical field: [0001] The invention belongs to the field of medical devices, and in particular relates to a novel release device for implanted devices. Background technique: [0002] At present, interventional devices on the market, especially cardiovascular interventional devices, are basically divided into two types: balloon expansion and self-expanding expansion. The balloon-expandable interventional stent is generally pressed and held on the expansion balloon by the loader outside the patient's body, and then reaches the target position through the lumen in the patient's body, and the expansion balloon is filled to the original size by filling with fluid, thereby allowing the stent to expand. Most coronary stents are released in the manner described above. For target sites with larger diameters, such as the aorta, pulmonary artery, and annulus, although balloon-expandable interventional stents occupy a part of the market, such as the Endwards Sapien series, there are ...

AI Technical Summary

Problems solved by technology

The advantage of this design is that it can make full use of the length of the bracket, and then release the bracket after it is released to the required size; but its problem is that when the bracket is released to the required size, the support force of the bracket will cause one end of the bracket to be pulled from the bracket. The memory effect of the shape memory alloy alone cannot ensure safety.

[0007] In the existing technology, the design of the stent mostly pursues a high supporting force in order to achieve a firm anchoring, which seriously compresses the tissues near the anchoring area, leading to various complications, such as the installation of a permanent pacemaker due to the compression of the conduction bundle, which affects the QOL

At the same time, for areas that are difficult to anchor in human anatomy, such as the annulus of the mitral valve, the existing stent design has not found a good anchoring solution, and even if the support force of the stent is increased, the stent may not be able to be firmly fixed.

There are various indications that although the techniques described above have certain effects in interventional therapy, there is no ideal release device for implanted instruments that can achieve firm anchoring, controllable release, and re-sheathing

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