The anchoring of an anchoring of an anatomical anchoring and the anchoring of the anchor and the conveyor system

Abstract

An ascending aorta repair stent anchored by the innominate artery, including the ascending aorta stent segment and the innominate artery stent segment, the innominate artery part of the stent is first released, and then the main part is released, and the distal opening of the main part is facing the aortic arch lumen far away end, the main part of the stent covers the primary tear of the ascending aorta with dissection. After release, the body portion terminates above the sinotubular junction. The longitudinal beam structure is made of temperature-dependent shape-memory metal materials extending to the greater curvature of the aortic arch and the lesser curvature of the aortic arch that continue to the innominate artery. Stick to the aortic wall. The stent is anchored only by the special anatomical shape of the ascending aorta and the innominate artery and the memory metal stringer structure. It is used for patients with type A aortic dissection who are waiting for surgery when there are surgical contraindications in the acute stage, and provides opportunities for follow-up surgical treatment for patients with acute type A aortic dissection with high surgical risk.

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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