Novel covered intravascular stent used for aortic arch

Abstract

The invention discloses a novel covered intravascular stent used for the aortic arch. The novel covered intravascular stent comprises a keel, a plurality of wave loops and a covering membrane, whereinthe plurality of wave loops are independently distributed along the length direction of the keel and are fixedly connected to the keel; the covering membrane covers the outer surfaces or the inner surfaces of the wave loops to form a pipe stent structure; and the front part of the covering membrane is provided with a plurality of through holes. The front part of the keel is provided with high andlow wave loops, and therefore, the flexibility of the front part of the pipe stent is improved; and then, after the stent is released in the aortic arch, the stent structure parts of the high and lowwave loops on the aortic arch can be perfectly fit to the aortic wall, so that a bend on the aortic arch can be effectively fit, in addition, through round hole cutting seams on the covering membrane, blood flow velocity and blood pressure in an aortic aneurysm can be lowered so as to form a thrombus creation environment, in addition, the blood flow volume of upper three branches can be guaranteed, and treatment safety and reliability can be improved.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to a novel covered vessel stent for the aortic arch. Background technique [0002] Thoracic aortic arch aneurysm is a pathological dilatation of a segment of the aorta that occurs in the aortic arch and is prone to dilatation and rupture. It is generally believed that the diameter of the aorta is more than 50% larger than the normal diameter of the same age and sex, and it can be considered that this part of the aorta has an aneurysm. Its pathogenesis includes heredity, trauma, hypertension, aortic atherosclerosis, iatrogenic injury and so on. Patients with aortic aneurysm have a high mortality rate, and unruptured aneurysms are usually asymptomatic, and in most patients, they are diagnosed incidentally during clinical examination or population screening. [0003] Clinically, the traditional treatment plan for such diseases is to perform thoracotomy total aortic arch artif...

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Problems solved by technology

[0003] Clinically, the traditional treatment plan for such diseases is to perform thoracotomy total aortic arch artificial vascular replacement (Bental operation). Due to the huge trauma of thoracotomy surgery and the need for extracorporeal bypass, the surgical risk is huge. Traditional surgical options have been reported in the past. The mortality rate is as high as 50%

Now in order to save the life of the patient, the "chimney" bracket implantation on the arch has been invented. The chimney bracket is a traditional circular bracket. There are often obvious gaps between the chimney stent and the aortic stent, and between the stent and the aortic vessel, resulting in an obvious inability to fit the endoleak effectively, which in turn cannot seal the dissection breach or aneurysm well, eventually leading to rupture of the aneurysm, etc. Serious consequences

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