In blast injuries, which statement is accurate?

In blast injuries, which statement is accurate?

• A. The lungs are the most likely to be injured by the primary blast wave.
• B. Brain injuries only occur from secondary injuries.
• C. Blast injuries only affect the surface.
• D. Solid organs are relatively protected from the primary shock wave, but may be injured during secondary or tertiary blast phases.

Answer: (D)

Understanding blast injuries means looking at how the different phases of a blast affect the body. The primary shock wave tends to damage gas-filled and hollow structures, like the lungs and the gastrointestinal tract, and can also impact the brain. Solid organs—such as the liver, spleen, and kidneys—are less affected by that initial pressure because of their density and how the wave travels through them. However, those same solid organs can be injured by secondary forces (shrapnel or fragments causing direct lacerations) or tertiar y forces (the body being thrown and impacting other objects, causing blunt trauma). That pattern—solid organs being relatively protected from the primary wave but vulnerable during secondary or tertiary phases—best fits how blast injuries commonly occur in the real world. While the lungs can suffer from the primary blast, and brain injuries can result from primary overpressure, and injuries are not limited to the body’s surface, none of those statements capture the overall injury pattern as clearly as the description of solid organs’ relative protection by the primary shock and susceptibility during later phases.

Understanding blast injuries means looking at how the different phases of a blast affect the body. The primary shock wave tends to damage gas-filled and hollow structures, like the lungs and the gastrointestinal tract, and can also impact the brain. Solid organs—such as the liver, spleen, and kidneys—are less affected by that initial pressure because of their density and how the wave travels through them. However, those same solid organs can be injured by secondary forces (shrapnel or fragments causing direct lacerations) or tertiar y forces (the body being thrown and impacting other objects, causing blunt trauma). That pattern—solid organs being relatively protected from the primary wave but vulnerable during secondary or tertiary phases—best fits how blast injuries commonly occur in the real world.

While the lungs can suffer from the primary blast, and brain injuries can result from primary overpressure, and injuries are not limited to the body’s surface, none of those statements capture the overall injury pattern as clearly as the description of solid organs’ relative protection by the primary shock and susceptibility during later phases.