The level of structural damage and injury caused by blast is dependent on the peak pressure(pressure decreases as you increase distance from origin), impulse length (a function of time and pressure), the overall shape of the pressure–time curve, and the elastic–plastic strength and natural period of oscillation of the structure or body.
In the human body, the shock wave/blast interacts with many types of tissues (eg, skin, fat, muscle and bone) that differ in density, elasticity and strength. Each tissue type, when interacting with a blast wave, is compressed, stretched, sheared or disintegrated by overload according to its properties.
Internal organs that contain air (sinuses, ears, lungs and intestines) are particularly vulnerable to blast.
These injuries are very difficult to diagnose. Will be interesting to hear how medics are trained to diagnose the internal injures.
