Branch sheath and conveying system

Abstract

The invention provides a branch sheath and a conveying system. The branch sheath comprises a control skeleton, a film covering sleeve, a binding coil and a connecting pipe. The control skeleton comprises a first fixing tube and a branch guide wire; the connecting tube comprises a second fixing tube and a third fixing tube, the far end of the first fixing tube is sleeved with the near end of the second fixing tube, the branch guide wire is sleeved with the far end of the second fixing tube and extends out of the film covering sleeve, and the far end of the film covering sleeve is sleeved with the near end of the third fixing tube; and the far end of the binding coil is fixed to the near end of the control framework, and the near end of the binding coil extends out of the film covering sleeve. The conveying system comprises the branch sheath. The release resistance of the branch stent can be effectively reduced, the overall outer diameter of the branch sheath is reduced, meanwhile, the connection strength between the film covering sleeve and the control skeleton can be effectively improved, the overall structure of the branch sheath is more stable, and the release success rate of the branch stent is effectively increased.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a branch sheath and a delivery system. Background technique [0002] With the development of intraluminal devices and interventional therapy, intravascular stent placement has become a common treatment method for aortic diseases such as aortic dissection, true and false aneurysm, and aortic penetrating ulcer. The delivery system sends the covered stent into the lesion and then opens it to isolate the tumor, breach or dissection from the blood, avoiding the risk of death caused by aneurysm rupture and dissection expansion and bleeding. [0003] At present, there are mature vascular stents at home and abroad for the descending thoracic aortic disease. In view of the situation that the lesion involves the upper arch branch, some branched covered stents have appeared, such as single-branch stent, two-branch stent, three-branch stent, branch Although the stent-graft can e...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a branch sheath and a delivery system, which can solve one or more of the problems in the prior art, such as high release resistance, low connection strength, and difficult use of the branch sheath.

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