Conveying device and its control components

Abstract

The present invention relates to a delivery device and its control assembly. The control assembly includes a handle main body, a first moving part and a second moving part. The inner sheath core tube and the outer sheath core tube can axially move through the handle main body; A moving part is used to connect with the core tube of the inner sheath and control the axial movement of the core tube of the inner sheath relative to the handle body. The first moving part has a locked state or an unlocked state relative to the handle body; the second moving part is used to connect with the outer sheath The core tube is connected and manipulates the sheath core tube to move axially relative to the handle main body. In the delivery device and its control assembly of the present invention, the control assembly is used to controllably control the axial movement of the inner sheath core tube and the outer sheath core tube to adapt to the synchronous pulling of the stent graft by the anchor assembly when the stent graft is anchored. The distal end moves toward the proximal end, so that the distal end of the stent-graft membrane fits the vessel wall, so as to avoid axial deviation of the distal end of the membrane-graft before and after releasing the stent-graft, thereby improving the release accuracy of the stent-graft.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a delivery device and a control assembly thereof. Background technique [0002] The technique of endovascular repair of thoracic aorta was first proposed by Parodi for the treatment of thoracic aortic dilatation disease, and then gradually used for the treatment of Stanford B aortic dissection (TBAD). Through research and technical improvement in recent years, it has become the preferred treatment method for various types of TBAD, including acute phase, chronic phase, stable type and unstable type, basically replacing the traditional open-thoracotomy aortic replacement surgery. Endovascular repair of the thoracic aorta is to seal the primary intimal tear with a covered stent, expand the true lumen, compress the false lumen, promote thrombosis of the false lumen, prevent dissection rupture, achieve aortic remodeling, and improve distal branches. The purpose of blood s...

AI Technical Summary

Problems solved by technology

[0003] However, when the anchoring area is relatively small, for example, the proximal end of the stent is anchored between the branches of the aorta, because the distance between the three branches on the aortic arch is small, the anchoring accuracy of the existing stent graft is insufficient. If it moves, the sealing effect of the covered stent will decrease, and even lead to type I endoleak

If the anchoring position deviates to the proximal end, it is easy to cause partial or complete coverage of branch vessels, affecting blood flow

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