The famous scientist Albert Einstein died suddenly in 1955 due to a ruptured abdominal aortic aneurysm, so what is an abdominal aortic aneurysm? Normal abdominal aorta diameter is mostly between 1.5-2.0cm, population aging, atherosclerosis, smoking and genetics may cause part of the abdominal aortic wall fragility, expansion, over time, the wall is getting thinner and thinner, the diameter of the blood vessel is expanding, and finally like a balloon is propped up into a blood ball, when the maximum diameter of the expansion exceeds the diameter of the normal segment of the aorta more than 1.5 times, it is called abdominal aortic aneurysm. Abdominal aortic aneurysm is an expansion of the wall of the abdominal aorta, not really a tumor, and there is no difference between benign and malignant. The incidence of abdominal aortic aneurysm is higher in western countries, and the incidence of abdominal aortic aneurysm in China is on the rise, with an incidence rate of about 8.8% in elderly people over 65 years old, mostly seen in men. When the aortic aneurysm is just formed, the patient will not feel any symptoms. When the abdominal aortic aneurysm reaches 3-4 cm in diameter, a pulsating mass can be felt around the belly button by itself. If the disease progresses further, the patient may feel pain in the back or abdomen before the aortic aneurysm is about to rupture. The risk of aneurysm rupture increases significantly over 5 cm, and the mortality rate can be as high as 70 to 80% when it increases to 7 cm or more. Therefore, abdominal aortic aneurysms are “untimely bombs” hidden in the belly, and there is a huge potential risk of rupture. In case of rupture, massive blood loss in the body can cause sudden death within a short period of time. According to some data, about 50% of abdominal aortic aneurysm ruptures worldwide are already incurable before being sent to the hospital; even if they can receive treatment, the success rate is less than half. Therefore, once a pulsating mass in the abdomen is detected, it needs to be actively examined at a hospital to avoid delaying the condition. The most common treatment methods are traditional open abdominal aortic artificial vessel replacement surgery and endovascular repair. The effect of traditional open surgery is determined, but it is traumatic to patients; compared with traditional open surgery, the prominent advantages of minimally invasive endoluminal treatment are less trauma, faster recovery, significantly lower postoperative complication rate and mortality rate, so that many high-risk patients who cannot tolerate traditional surgery with combined heart, lung, kidney and other organ diseases have a chance to be cured, but the disadvantage is the high cost.