Blast Injury

• Primary: injuries due to high-order explosive over-pressurization shock wave as it moves through the body from solid and liquid sections to gas filled organs, in particular the lungs, gastro-intestinal tract and middle ear. Solid and liquid filled organs of the body are not subject to primary blast injury. These injuries are not necessarily obvious to observers.
• Secondary: injuries due to bomb fragments and other objects propelled by the explosion. These injuries may affect any part of the body and a visible sometimes resulting in hemorrage. At times the propelled object may become embedded in the body, obstructing the loss of blood to the outside. However, there may be extensive loss of blood within the body cavities. Shrapnel wounds may be lethal and therefore many anti-personnel bombs are designed to generate shrapnel and fragments.
• Tertiary: injuries due to the blast wind (not the over-pressurization shock wave) which include bone fractures and traumatic amputation.
• Quaternary: all other injuries not included in the first three classes. These include burns, crushing injuries and respiratory injuries.

References

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