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Fig. 1B 62-year-old man with primary blast injuries. Some patients
injured by primary blast may appear unharmed and cannot be assessed by naked
eye or physical examination. Gas-filled organs such as ears, lungs, and
gastrointestinal tract are most vulnerable to blast effect. Injury to lungs is
cause of greatest morbidity and mortality from blast effect. Further
deterioration causes complete whitening of lungs.