What causes primary blast injuries?

Primary blast injuries are specifically caused by the shockwave that is generated by an explosion. When an explosive device detonates, it creates a rapid release of energy, which produces a shockwave that travels through the air. This shockwave can cause significant damage to body tissues, particularly the air-filled structures such as the lungs, ears, and gastrointestinal tract. These injuries typically occur without any direct impact from shrapnel or other debris, making them distinct from secondary or tertiary blast injuries, which result from other factors like flying debris or being thrown by the blast. Understanding primary blast injuries is crucial in emergency medical settings, particularly in the context of blast-related incidents, as they require specific assessment and management strategies to address the unique types of trauma they cause.