Intravascular stent conveying device

Abstract

The invention provides an intravascular stent conveying device with the advantage that an intravascular stent can not easily generate displacement under the blood flow impact force. The intravascular stent conveying device comprises a guide head, a core tube, a middle tube and an exotheca tube, wherein the guide head can be developed in X rays, the core tube is connected with the guide head, the middle tube is sheathed and arranged at the outer side of the core tube and can move in the axial direction, the exotheca tube is sheathed and arranged at the outer side of the middle tube and can move in the axial direction, a lock control assembly used for converting a heat end bare stent of the intravascular stent from the maintained state to a state getting out from the maintained state is also arranged between the guide head and the middle tube, the lock control assembly comprises a bare stent accommodating element, a bare stent maintaining element and an unlocking element, the bare stentaccommodating element is fixed on the outer surface of the guide head or the core tube, a groove used for accommodating the contracted bare stent is formed on the bare stent accommodating element, inaddition, the bare stent accommodating element is provided with at least one guide hole penetrated in the axial direction, the bare stent maintaining element is connected on the guide head or the core tube, and can pass through the bare stent so that the bare stent can be in the maintained state, one end of the unlocking element is connected with the bare stent maintaining element, the bare stentcan get out from the maintained state through pulling the unlocking element, and the other end of the unlocking element passes through the middle tube in the axial direction and extends out from the tail end of the middle tube.

Description

technical field [0001] The invention relates to a medical device for intraluminal repair of human aorta, in particular to a vascular stent delivery device. Background technique [0002] Endovascular repair of aortic disease is a technology that has developed rapidly in my country in recent years for the treatment of aortic disease. Its indications include aortic dissection, aortic true aneurysm, aortic pseudoaneurysm, aortic ulcer and trauma diseases such as aortic rupture. At present, it can be completely treated by interventional therapy, which can not only achieve satisfactory curative effect, but also avoid serious complications. [0003] Endovascular repair of aortic disease through interventional methods is to quickly and accurately release the aortic stent graft to the vascular lesion site through the delivery device, just like adding a lining to the blood vessel, so as to achieve the purpose of repairing the aortic lesion . The stent graft is actually a cylindrical...

AI Technical Summary

Problems solved by technology

However, there will be a short-term process of blocking the aortic blood flow when the stent head is released and begins to adhere to the wall until the stent is completely released. During this process, the part of the stent that bounces off will bear strong blood impact, and this pressure often affects The positioning of the stent in the blood vessel leads to unsatisfactory operation effect or even operation failure

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