Conveying device and control assembly thereof

Abstract

The invention relates to a conveying device and a control assembly thereof. The control assembly comprises a handle main body, a first moving part and a second moving part, and an inner sheath core tube and an outer sheath core tube can axially and movably penetrate through the handle main body; the first moving part is used for being connected to the inner sheath core tube and controlling the inner sheath core tube to axially move relative to the handle main body, and the first moving part has a locking state or an unlocking state relative to the handle main body; and the second moving part is used for being connected to the outer sheath core tube and controlling the outer sheath core tube to move axially relative to the handle body. According to the conveying device and the control assembly thereof, the inner sheath core tube and the outer sheath core tube are controllably controlled by the control assembly to move in the axial direction. Under the condition that a covered stent is anchored by an anchoring assembly, the far end of the covered stent is synchronously pulled to move towards the near end, so that the far end of the membrane of the covered stent is attached to the blood vessel wall, axial deviation of the far end of the membrane of the covered stent before and after released is avoided, and then the release precision of the covered stent is improved.

Description

Technical field [0001] The present invention relates to the technical field of medical devices, in particular to a conveying device and its control assembly. Background technique [0002] Thoracic aortic endovascular repair treatment technology was first proposed by Parodi and used for the treatment of thoracic aortic dilatation diseases, and then gradually used for the treatment of Stanford B aortic dissection (TBAD). Through research and technological improvements in recent years, it has become the preferred treatment for all types of TBAD, including acute, chronic, stable and unstable types, and has basically replaced the traditional open thoracic aortic replacement surgery. Thoracic aortic endovascular repair treatment technology is to seal the primary endometrial rupture through the covered stent, and expand the true cavity, compress the false cavity, promote the thrombosis of the false cavity, prevent the dissection rupture, achieve aortic reconstruction, and improve the di...

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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