An aneurysm is a limited, permanent enlargement of an arterial vessel that exceeds 1.5 times its normal diameter. For example, if the abdominal aorta does not normally exceed 2.0 cm, an enlargement somewhere in that segment of the vessel that exceeds 3.0 cm in diameter is considered an abdominal aortic aneurysm. Aneurysms are becoming more common as people’s standard of living improves and the life expectancy of the population increases. It is one of the common vascular diseases in the elderly. There are many ways to classify aneurysms, and they can be classified according to the morphological structure of the aneurysm wall: 1. True aneurysm: The lumen of the artery is enlarged and the three-layer structure of the artery wall exists, which is called true aneurysm. 2. Pseudoaneurysm: Due to trauma, infection or medical injury to the vessel wall, blood enters the surrounding tissues through the rupture and is wrapped and confined, and the lumen of the aneurysm pulsates with the impact of blood. However, the aneurysm wall does not have the three-layer structure of normal blood vessel wall, which is called pseudoaneurysm. 3.Intercalated aneurysm: Mostly due to the elderly, hypertension is not well controlled, high pressure, high speed blood flow impacting on the wall of large blood vessels resulting in the rupture of the intima layer, the blood flow enters the middle layer of the vessel wall, propping up the vessel wall and tearing it distally to form a false cavity (the original vessel cavity is called the true cavity), so it is also called aortic intercalation. Although aneurysms are not malignant tumors – cancer – as they are often called. However, if not treated, the aneurysm will not shrink due to the impact of blood flow every moment, but will only keep expanding and eventually burst like a balloon. Therefore, some people call aneurysm in the body a time bomb in the human body, which will be life-threatening if it explodes. What can be done? The treatment principle of aneurysm is to choose surgical treatment as long as the patient can tolerate the surgery. There are two types of surgical treatment: traditional open surgery and interventional surgery. Conventional open surgery: The aneurysm is treated by dissecting the chest or abdomen, blocking the blood vessels above and below the aneurysm (sometimes extracorporeal circulation is required), removing the diseased vessel segment, and using an artificial vessel graft. The surgery is very traumatic, with much blood loss, slower recovery and more complications. For example, thoracic aortic coarctation or thoracic aortic aneurysm may lead to postoperative paraplegia due to ischemia of the thoracic segment of the spinal cord after open-heart surgery to replace the vessel. However, for abdominal aortic aneurysms or other limb aneurysms, as long as a physician with vascular surgery expertise can control the blood vessels well, there will not be much surgical bleeding and the surgery is safe. Another surgical method is interventional surgery, which involves puncturing or cutting through a distant normal vessel under radiological imaging surveillance and putting a specially designed stent with membrane into the section of the aneurysm so that blood flow no longer enters the aneurysm cavity and no longer impacts the wall of the aneurysm to achieve the effect of isolating the aneurysm, also called intraluminal isolation. This method is a minimally invasive procedure that has been developed in the last decade or so and is very effective, minimally invasive and has a quick recovery. It can only be performed by hospitals with special equipment (angiography machines) and by vascular surgeons and radiologic interventionalists with specialized skills. Also the cost is higher due to the special materials. If the patient’s health is really too poor, such as having paralysis, heart failure, kidney failure and other vital organ insufficiency, he or she cannot tolerate the surgery. Just don’t take the risk of surgery. Pressure-lowering therapy is the only non-surgical treatment that can only reduce the impact on the aneurysm and delay the outbreak of the time bomb.