Which of the following is considered a significant mechanism of injury that would warrant rapid head-to-toe assessment?

• A. A stable patient involved in a low-speed collision.
• B. An elderly patient who tripped and fell 3 feet.
• C. A motor vehicle crash at highway speeds with potential ejection.
• D. A minor laceration to the forearm.

Answer: (C)

Mechanism of injury guides how thoroughly you assess a trauma patient. A high-energy event transfers a lot of energy into the body and can cause serious injuries that aren’t immediately obvious, so you perform a rapid head-to-toe assessment to catch hidden life threats and guide urgent care.

In a highway-speed motor vehicle crash with potential ejection, the energy involved is substantial. Deceleration, possible blunt trauma from multiple impact sites, and unrestrained movement raise the risk of severe injuries to the head, neck, chest, abdomen, pelvis, and spine. Even if the patient looks stable, there can be internal bleeding or organ injury that you must identify quickly.

The other scenarios involve lower-energy mechanisms or less likelihood of multiple hidden injuries: a stable patient after a low-speed crash, an elderly person who fell a short distance (frailty changes risk, but the mechanism itself is not as high-energy as a highway crash), and a minor forearm laceration (not a mechanism that implies widespread injuries).