Stent conveying system

Abstract

The invention provides a stent conveying system. The stent conveying system comprises an inner pipe, an outer pipe and a guide rail lock assembly. A shifting piece assembly and a handle assembly sleeve the outer portion of the guide rail lock assembly. The tail end of the inner pipe is fixedly connected with the tail end of the guide rail lock assembly, and a rear release assembly and a flushing assembly are further arranged at the tail end of the guide rail lock assembly. The outer pipe is arranged at the front end of the inner pipe in a sleeving mode, and the tail end of the outer pipe is connected with a connecting rod in the shifting piece assembly through a detachable lock catch structure. The handle assembly sleeves the outer portion of the shifting piece assembly. Internal threads of a rotating handle in the handle assembly are meshed with external threads of a shifting piece in the shifting piece assembly. The stent conveying system is simple in structure and excellent and reliable in performance. In the release process of a covered stent, the covered stent can be stably and accurately released in the mode of combining rotary accurate release and sliding rapid release, andthe problem that due to the fact that the covered stent blocks blood flow for a long time, a blood vessel or an aneurysm is broken can be avoided; and meanwhile, the problem that the release accuracyof the stent is influenced by the wind bag effect can be avoided.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a stent delivery system. Background technique [0002] Aortic aneurysm or dissection is a fatal vascular surgical disease, which may be caused by atherosclerosis, cystic necrosis of the media, syphilis infection, bacterial infection, rheumatic aortitis and trauma, and has a high incidence . [0003] With the continuous development of modern medical technology, a minimally invasive and simple interventional surgery method has been developed for high-risk patients with aortic aneurysm or dissection in recent years, that is, endovascular repair of aortic aneurysm or dissection by using covered stents. In this repair, the covered stent is delivered to the diseased position of the aorta through the minimally invasive incision of the femoral artery under the action of the stent delivery system. This restores normal blood flow in the lumen of the aorta, providing a permanent a...

AI Technical Summary

Problems solved by technology

When the covered stent is delivered to the lesion and isolates the lesion, the covered stent needs to be able to isolate the lesion and ensure the smooth flow of important branches. Therefore, this poses a high challenge to the stent delivery system

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