Ascending aorta stent anchored by innominate artery for dissection, and delivery system

Abstract

The invention provides an ascending aorta repair stent anchored by innominate artery, comprising an ascending aorta stent segment and an innominate artery stent segment, wherein an innominate artery portion of the stent is first released and a body portion is then released; the distal end opening of the body portion facing the distal end of the aortic arch lumen, and the body portion of the stentcovers the dissection at the primary rupture of the ascending aorta. When the release is completed, the main body terminates above the junction of the sinus canal. The longitudinal beam structure is made of a temperature-dependent shape memory metal material extending to the great curvature side of the aortic arch of the innominate artery and to the minor curvature side of the aortic arch, and isreleased so as to satisfy the individualized ascending aortic anatomical arc of different patients to abut against the aortic wall. The stent is anchored only according to the special anatomical shapeof the ascending aorta and the innominate artery and the memory metal longitudinal beam structure. Used in patients with type A aortic dissection in the acute phase of surgical contraindication whenwaiting for the transitional phase of surgery for patients with high surgical risk of acute type A aortic dissection to provide follow-up surgical treatment opportunities.

Description

technical field [0001] The application belongs to the field of medical devices, and specifically relates to the technical field of stents for aortic (large blood vessel) interventional therapy. Background technique [0002] The aortic interventional stent is a large vascular stent that is different from the coronary stent. The so-called aorta is the large artery that connects to the heart. Its main purpose is to seal the dissection breach, open the true lumen, and restore blood flow. At present, this kind of stent is mostly used on the aortic arch and descending aorta. [0003] Aortic dissection is a disease in which the intima of the aortic vessel is damaged and blood flows between the layers of the aortic wall, resulting in vascular delamination. Most of the time, with an aortic dissection, there is severe tearing chest pain or back pain. After aortic dissection occurs, the true lumen of the aorta is compressed, and the aorta cannot deliver enough blood to various orga...

AI Technical Summary

Problems solved by technology

[0011] 1. The stent passes through the peripheral vascular retrograde approach (transfemoral artery, radial artery), the operation site is far away from the ascending aorta, the operation is complicated, and the technique is difficult. During the placement process, the delivery device may enter the dissection false lumen, resulting in the death of the patient with aortic rupture serious consequences;

[0012] 2. It still needs to be anchored to the aorta with dissection in the traditional way, which is very likely to damage the aorta with dissection, resulting in aortic rupture and death of the patient, thus greatly limiting the surgical indications;

The finished stents currently on the market are all anchored by the existing corolla structure and barb device, because this method may cause fatal secondary damage to the ascending aortic dissection, so it is not suitable for the dissection of the ascending aorta;

[0017] 2. Coronary perfusion may be affected after stent implantation

Due to the current anchoring method of the stent, when it is anchored at the aortic sinus of the ascending aorta, it may damage the coronary artery opening, thereby affecting coronary artery perfusion and causing serious consequences such as myocardial ischemia;

[0018] 3. Existing products cannot adapt to the diameter of the ascending aorta after dissection;

[0019] 4. Since the ascending aorta has a certain curvature and is short in length, the current product cannot conform to the anatomical curvature of the ascending aorta;

[0020] 5. Currently patented or unmarketed experimental stents are all final treatment options for type A aortic dissection, and all have the risk of potentially serious complications

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