Which statement about blast injuries is correct?

Which statement about blast injuries is correct?

• A. 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 recognizing how the injuries unfold across different phases of a blast. The primary blast wave is the initial overpressure that travels through the air. This surge most strongly affects air-filled structures, such as the lungs and the ear, but it can also impact the brain. Solid organs—like the liver, spleen, and kidneys—are less vulnerable to this initial pressure pulse because they’re dense and not hollow, so they’re relatively protected from the primary wave. However, those solid organs can still be injured when other blast phases come into play, specifically secondary injuries from flying debris or shrapnel and tertiary injuries from the body being hurled into objects or surfaces. That combination is why the statement about solid organs being relatively protected from the primary shock yet capable of injury during secondary or tertiary phases is correct. It’s also important to keep in mind that blast injuries aren’t limited to surface effects, and brain injuries can result from primary overpressure as well as from secondary and tertiary mechanisms. This multi-mechanism nature is what makes blast injuries unique and why multiple body systems can be affected.

Understanding blast injuries means recognizing how the injuries unfold across different phases of a blast. The primary blast wave is the initial overpressure that travels through the air. This surge most strongly affects air-filled structures, such as the lungs and the ear, but it can also impact the brain. Solid organs—like the liver, spleen, and kidneys—are less vulnerable to this initial pressure pulse because they’re dense and not hollow, so they’re relatively protected from the primary wave. However, those solid organs can still be injured when other blast phases come into play, specifically secondary injuries from flying debris or shrapnel and tertiary injuries from the body being hurled into objects or surfaces. That combination is why the statement about solid organs being relatively protected from the primary shock yet capable of injury during secondary or tertiary phases is correct.

It’s also important to keep in mind that blast injuries aren’t limited to surface effects, and brain injuries can result from primary overpressure as well as from secondary and tertiary mechanisms. This multi-mechanism nature is what makes blast injuries unique and why multiple body systems can be affected.