Which BEST describes the mechanism of injury (MOI)?

• A. The energy of an object in motion.
• B. The way in which traumatic injuries occur.
• C. Your concern for potentially serious injuries.
• D. The product of mass, force of gravity, and height.

Answer: (B)

MOI describes the event that causes trauma—the actual incident and the forces involved, including how they act on the body and in what direction or sequence. This helps you anticipate what injuries to look for and what treatments might be needed based on how the injury occurred. It isn’t about the energy of a moving object in isolation, nor is it about a gravity-based energy calculation (that would be a potential energy calculation, not MOI), and it isn’t a triage concern about how serious injuries might be. The essential idea is that MOI is the way in which traumatic injuries occur—the mechanism by which the forces are applied to the body—so that’s why this description best fits MOI.