Combined abdominal aorta covered stent system and utilization method thereof

Abstract

A combined abdominal aorta covered stent system and a utilization method thereof are applied to surgeries for endovascular interventional treatment of abdominal aortic aneurysm. The system comprises a body covered stent and a pair of branch covered stents, and each of the stent is cylindrical and provided with a delivery system. The near end of the body covered stent is a bare stent with barbs, a covered section comprises an upper half portion in a single-cavity cylinder shape and a lower half portion with a fixed outer diameter, and the lower half portion is averagely partitioned into two cavities by a longitudinal partition. Small-waveband stent rings are designed at near and far ends of the covered section of the body covered stent, and other covered parts can be either provided with stent rings or not. The upper half portion of the covered section is implanted at a neck position of infrarenal aortic aneurysm, and the lower half portion is suspended in an aneurysm cavity. The branch covered stents parallelly and internally sleeve the two cavities of the body covered stent, near ends of the branch covered stents are flush with the near end of the lower half portion of the body covered stent and fill the cavities of the body covered stent in a self-adoption manner, and far ends of the branch covered stents are implanted into iliac artery branches to better adapt to arterial aneurysms excessive in aneurysm neck torsion.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a combined abdominal aortic stent graft system and its application method. [0002] technical background [0003] Abdominal aortic aneurysm is an aneurysm-like expansion of the abdominal aorta, which causes a high mortality rate after rupture. The incidence rate in Europe and the United States is about 2% to 4%; the domestic incidence rate is about 36.2 / 100,000, and with the improvement of people's living standards and medical detection levels, the incidence and detection rate of abdominal aortic aneurysm are on the rise. [0004] The clinical treatment of abdominal aortic aneurysm mainly includes open surgery and endovascular interventional surgery. Among them, due to minimal invasiveness, few surgical complications, and short general anesthesia time, endovascular interventional surgery has become the first choice for the treatment of abdominal aortic aneurysms under app...

AI Technical Summary

Problems solved by technology

[0006] One of the main purposes of the present invention is to provide a combined abdominal aortic stent graft system, which aims to solve the problem that the existing abdominal aortic stent graft cannot adapt to complex diseases such as severe distortion of the proximal aneurysm neck, and the proximal end is prone to endoleak , the problem of poor flexibility and easy discounts at the bifurcation of the branch bracket

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