|
Pathophysiology: Blast injuries traditionally are divided into 4 categories: primary, secondary, tertiary, and miscellaneous injuries. A patient may be injured by more than one of these mechanisms.
A primary blast injury is caused solely by the direct effect of blast overpressure on tissue. Air is easily compressible, unlike water. As a result, a primary blast injury almost always affects air-filled structures such as the lung, ear, and gastrointestinal (GI) tract.
A secondary blast injury is caused by flying objects that strike people.
A tertiary blast injury is a feature of high-energy explosions. This type of injury occurs when people fly through the air and strike other objects.
Miscellaneous blast-related injuries encompass all other injuries caused by explosions. For example, the collision of two jet airplanes into the World Trade Center created a relatively low-order pressure wave, but the resulting fire and building collapse killed thousands.
__________________
Somewhere a True Believer is training to kill you. He is training with minimal food or water, in austere conditions, training day and night. The only thing clean on him is his weapon and he made his web gear. He doesn't worry about what workout to do - his ruck weighs what it weighs, his runs end when the enemy stops chasing him. This True Believer is not concerned about 'how hard it is;' he knows either he wins or dies. He doesn't go home at 17:00, he is home.
He knows only The Cause.
Still want to quit?
|