Abdominal aortic aneurysm is not a tumor in the usual sense, but a permanent, limited dilatation of the abdominal aorta, which is twice the diameter of the normal abdominal aorta. The average diameter of the infrarenal aorta in adult men is 2.3 cm, while in women the corresponding diameter is only 1.9 cm. Therefore, an abdominal aortic aneurysm can be diagnosed when the abdominal aorta is dilated more than 4 cm. Abdominal aortic aneurysms are most common in older men over 60 years of age, with a male to female ratio of approximately 7:1. The disease is usually asymptomatic and is most often detected during a health examination or when the patient feels a pulsating mass in the abdomen. Once a patient develops abdominal pain, it is usually the first sign of a ruptured abdominal aortic aneurysm and requires urgent hospital treatment. Ruptured abdominal aortic aneurysms are very dangerous, and even if they can be operated on quickly, the mortality rate is still greater than 50%. Atherosclerosis, hypertension, and smoking are risk factors for abdominal aortic aneurysms, and infections can also cause abdominal aortic aneurysms, which are the most common cause of aortic aneurysms in adolescents. According to Laplace’s law, the tension of the arterial wall is proportional to its lumen diameter. Thus, the larger the diameter of the aneurysm, the greater the pressure on the arterial wall and the higher the risk of aneurysm rupture! Current data indicate that aneurysms of 5-5.9 cm in diameter have a 5-year incidence of rupture of 25%. Aneurysms of 6 cm have a rupture rate of nearly 35%, and aneurysms of 7 cm or larger have a 5-year rupture rate of more than 75%. Therefore, once diagnosed, abdominal aortic aneurysms should be treated immediately by a vascular surgeon for specialized care. The treatment of abdominal aortic aneurysm is divided into pharmacological and surgical treatment. Drug therapy is mainly used for patients who have organ insufficiency and cannot tolerate surgery, or for smaller aneurysms of the abdominal aorta that do not exceed 5 cm in diameter. The main measures are smoking cessation, strict control of the patient’s blood pressure, and lipid-lowering treatment. Because the diameter of abdominal aortic aneurysm will increase year by year, and patients are mostly of advanced age, the decline of physical condition with age will increase the risk of future surgery, and the current surgical treatment plan is mature and the success rate of surgery is high, so after the diagnosis of abdominal aortic aneurysm, patients are recommended to have surgery as soon as possible. The main surgical treatment methods are abdominal aortic aneurysm resection + artificial vascular graft, and abdominal aortic aneurysm endoluminal treatment (overlapping stent implantation). Because endoluminal treatment of abdominal aortic aneurysm (overlapping stent implantation) does not need to open the abdomen, only two small incisions of 3-5 cm are needed at the root of the thighs bilaterally, and the operation can be performed under local anesthesia, which is less traumatic and has fast postoperative recovery, so it is welcomed by the majority of patients and vascular surgeons, and has been promoted in the clinical application, and has become the most commonly used surgical procedure for the treatment of abdominal aortic aneurysm. The disadvantage is that it is currently more expensive. Endoluminal treatment of abdominal aortic aneurysms Abdominal aortic aneurysm resection + artificial vessel grafting remains the classic surgical procedure for the treatment of infrarenal abdominal aortic aneurysms, requiring open excision of the abdominal aortic aneurysm and replacement of the diseased segment of the abdominal aorta with an artificial vessel. The advantages of the procedure are its exact efficacy and low cost, but the disadvantages are the high surgical trauma, slow postoperative recovery, and the inability of some elderly people to tolerate the surgical trauma due to the decline of organ function. Abdominal aortic aneurysm resection + artificial vascular grafting After surgical treatment of abdominal aortic aneurysm, one should still strictly quit smoking, control blood pressure, and avoid constipation, chronic cough and other conditions that increase abdominal pressure.