Which collision type is most deadly due to potential aortic injury?

Which collision type is most deadly due to potential aortic injury?

• A. Lateral
• B. Frontal
• C. Rear-end
• D. Spin/rotational

Answer: (A)

Rapid deceleration injuries to the chest can tear the aorta at its fixed point near the ligamentum arteriosum. In a side impact, the chest is compressed between the spine and the door or car frame, creating a sharp shear force on the mediastinal vessels. The aorta is relatively immobile there, so this energy focuses on tearing it, leading to massive internal bleeding into the chest and often rapid fatal tamponade. Frontal crashes also involve deceleration, but the energy is distributed across more structures and the rupture pattern is less concentrated on the aorta. Rear-end and spin/rotational injuries produce different trauma patterns with less direct aortic rupture. So, lateral collisions carry the greatest risk of deadly aortic injury.

Rapid deceleration injuries to the chest can tear the aorta at its fixed point near the ligamentum arteriosum. In a side impact, the chest is compressed between the spine and the door or car frame, creating a sharp shear force on the mediastinal vessels. The aorta is relatively immobile there, so this energy focuses on tearing it, leading to massive internal bleeding into the chest and often rapid fatal tamponade. Frontal crashes also involve deceleration, but the energy is distributed across more structures and the rupture pattern is less concentrated on the aorta. Rear-end and spin/rotational injuries produce different trauma patterns with less direct aortic rupture. So, lateral collisions carry the greatest risk of deadly aortic injury.