West Coast EMT Block One Exam

Which statement regarding blast injuries is true?

1. Solid organs are relatively protected from shock wave injury.

2. Tertiary blast injuries involve shock wave effects exclusively.

3. Solid organs are most susceptible to pressure changes.

4. The gastrointestinal tract is the leading cause of death from blast injuries.

The correct answer is: Solid organs are relatively protected from shock wave injury.

The rationale behind the selection of the statement regarding blast injuries focuses on the nature of these types of injuries and the protective characteristics of solid organs. Solid organs, such as the liver, spleen, and kidneys, are generally cushioned by surrounding tissues and are less affected by shock waves compared to other bodily structures. The shock wave generated by an explosion primarily affects hollow organs and structures with air or fluid content, leading to higher vulnerability in these areas rather than in solid organs. This insight contrasts with the other options. Tertiary blast injuries involve injuries sustained from being propelled by the force of the blast, which can include impacts with solid objects or the ground, rather than being limited to shock wave effects. While solid organs can indeed be affected by pressure changes, they do not experience the same level of susceptibility as hollow organs, which can rupture or become damaged more readily due to rapid pressure fluctuations. Finally, although gastrointestinal injuries are serious and can contribute to mortality, they aren't universally considered the leading cause of death from blast injuries; factors like traumatic hemorrhage or brain injuries from primary impacts often take precedence.