What causes primary blast injury?

Primary blast injury is caused by the pressure wave generated from an explosive event, which leads to rapid changes in atmospheric pressure. When an explosion occurs, it produces a shockwave that can affect the body in a unique way compared to other forms of injuries. This pressure wave can cause significant damage to air-filled organs, such as the lungs, as well as other structures like the eardrums, and can impact the brain, leading to concussions or other diffuse injuries.

The mechanism of primary blast injuries relates directly to this intense and rapid change in pressure rather than mechanical trauma from flying debris or heat-related injuries, which are associated with secondary and tertiary blast injuries. Understanding this distinction is crucial in assessing injuries sustained in explosive incidents, making the recognition of blast injury types essential for effective treatment and management in emergency medical situations.