Free BCEN Certified Emergency Nurse (CEN) Practice Question

An aortic dissection occurs when blood enters the medial layer of the aortic wall, creating a false lumen. This is different from an aneurysm, which is a localized dilation of the blood vessel. The key feature of a dissection is the separation of the layers of the aortic wall, allowing blood to flow between them. This condition is a medical emergency that requires immediate intervention. Understanding the difference between dissection and aneurysm is critical for proper diagnosis and management in the emergency setting.