Ascending aorta covered stent released by transapical approach

Abstract

The invention relates to an ascending aorta covered stent released by a transapical approach. The stent includes a self-expanding covered stent and a conveyor. The self-expanding covered stent includes a corolla region and a trunk. The corolla region includes a corolla and a plurality of metal marking points arranged at the top of the corolla. The corolla is composed of six valve leaflets woven from a nickel-titanium alloy wire, and is anchored to the aortic sinus of a patient. The stent position is adjusted by the metal marking points during positioning to ensure that a coronary artery opening is smooth. The corolla region is an inflow region with the effects of supporting and flow guiding. The trunk is connected and communicated with the corolla region, and comprises a stent membrane anda stent framework. The conveyor comprises a hollow support rod, a hollow guide wire passing through the support rod, an outer sheath arranged at the beginning end of the support rod, a corolla locking device disposed on the support rod and a conical tip disposed at the end of the support rod and developable under X-rays. The stent is inserted through the apex, a release path is straight and short, and the risk of repairing the ascending aorta in the cavity is reduced.

Description

technical field [0001] The invention relates to the technical field of aortic endoluminal repair, in particular to an ascending aortic covered stent released through the apical approach. Background technique [0002] In the field of treatment of aortic disease (dissection or aneurysm), minimally invasive endovascular repair technology is gradually replacing the traditional large-invasive open surgery. The current consensus is that endovascular repair is the first choice for dissections involving the descending aorta. For dissection lesions involving the aortic arch, strategies such as "parallel stent technique", "stent-graft fenestration technique", and even "stent-graft with branches" are not perfect for all cases, but are gradually changing the aortic arch Total endovascular repair of aortic arch lesions is the development trend of aortic surgery. However, for dissections or aneurysms involving the ascending aorta, thoracotomy and artificial vascular replacement of the a...

AI Technical Summary

Problems solved by technology

Morphological features limit the use of existing endoluminal grafts in the ascending aortic region

At present, there is no "ideal stent" that can perfectly solve these problems, making ascending aortic lesions always a forbidden area for "endovascular repair"

2. Hemodynamic limitations: the pumping pressure of the left ventricle is high, and the existing stent grafts are all via the femoral artery, which is too long and needs to pass through the curved aortic arch

There are also cases where ascending aortic stents are inserted through the right subclavian artery approach, but there are also problems of bending and angulation of the approach, which affects positioning

Images