Question

A victim of a bomb blast sustains burns to the chest and face caused by the fireball and the heat of the explosion (not by the blast wave, flying fragments, or being thrown against a structure). This burn injury is best classified as which category of blast injury?

• A. Quaternary blast injury
• B. Primary blast injury
• C. Secondary blast injury
• D. Tertiary blast injury

Hint:

Burns and inhalation effects are the 'everything-else' category of blast trauma.

Answer 1

The Correct Option is A

Step 1: Blast injuries are classified into four categories based on the mechanism by which the explosion harms the victim.

Step 2: Primary injury is due to the blast (over-pressure) wave acting on gas-containing organs - ear drum rupture, blast lung, and bowel perforation. Secondary injury is due to flying fragments and debris causing penetrating and lacerating wounds. Tertiary injury is due to the body being thrown against a hard surface, causing blunt trauma and fractures.

Step 3: Quaternary injury includes all other explosion-related effects not covered above - burns (flash/flame), inhalation of toxic gases and dust, crush injury, and exacerbation of pre-existing conditions (e.g., asthma, angina).

Step 4: Burns to the chest and face from the heat/fireball of the explosion fall squarely under the quaternary category.

Step 5: Why the others are wrong - the pressure wave (primary), fragments (secondary), and displacement of the body (tertiary) did not produce these burns; the thermal effect of the blast did.

Key fact: Blast-related burns = quaternary blast injury.