Primary Mechanism Primary Blast Injury

The energy produced by the explosion generates a shock wave that has three components: an extremely short high-positive pressure phase, a longer but milder negative-pressure phase, and a "blast wind" - a massive movement of air. Gas-containing organs, such as the middle ear, the respiratory system, and the gastrointestinal tract, are injured by this baro-trauma with micro-and macroscopic tears of the gas-fluid interface. The common injuries consist of perforation of the eardrums, "blast lung" (alveolar capillary disruption, bronchopleural fistulas, and air emboli), and bowel perforations.

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