Which term refers to the swelling or enlargement of a blood vessel wall due to weakening?

An aneurysm is characterized by the abnormal swelling or enlargement of a blood vessel wall caused by a weakening of the vessel's structure. This condition can occur in various types of vessels, including arteries and veins, and is often associated with factors such as hypertension, atherosclerosis, or genetic predispositions.

When the vessel wall weakens, it can bulge outwards, creating a localized dilation. This can lead to serious complications, including rupture of the vessel, which can result in life-threatening internal bleeding. Understanding the nature of an aneurysm is crucial in emergency care, as timely identification and treatment are essential to prevent severe outcomes.

Other terms, such as thrombosis, refer specifically to the formation of a blood clot inside a blood vessel, which obstructs blood flow. An embolism involves a clot or other substance traveling through the bloodstream and can cause blockages elsewhere. Phlebitis is an inflammation of a vein, often accompanied by pain and swelling, but it does not imply the weakening of the vessel wall leading to an outpouching. Recognizing these distinctions is important in assessing and responding to vascular conditions in emergency situations.