Which statement correctly identifies the gastrointestinal involvement in blast injuries?

Which statement correctly identifies the gastrointestinal involvement in blast injuries?

• A. The liver is the primary gas-filled organ
• B. The stomach is not affected by blast injuries
• C. The colon is primary (gaseous areas most vulnerable)
• D. The spleen is never injured

Answer: (C)

When a blast hits, hollow organs that contain gas are best suited to absorb the sudden pressure surge and are most prone to rupture. The colon stands out because it holds a large volume of gas and has segments that are relatively fixed within the abdomen, making its walls especially vulnerable to the rapid pressure changes from the blast. This combination—gas-filled lumen plus mechanical stresses on the wall—explains why the colon is often the primary GI structure injured in blast events. The liver, being a solid organ, isn’t primarily driven by gas pressure effects and is less likely to rupture from the gas-related mechanism. The stomach is indeed gas-filled and can be injured by a blast, so saying it is not affected would be inaccurate. The spleen can be injured by blast shock as well, but it’s not a GI hollow-viscera finding, and it isn’t “never” injured.

When a blast hits, hollow organs that contain gas are best suited to absorb the sudden pressure surge and are most prone to rupture. The colon stands out because it holds a large volume of gas and has segments that are relatively fixed within the abdomen, making its walls especially vulnerable to the rapid pressure changes from the blast. This combination—gas-filled lumen plus mechanical stresses on the wall—explains why the colon is often the primary GI structure injured in blast events.

The liver, being a solid organ, isn’t primarily driven by gas pressure effects and is less likely to rupture from the gas-related mechanism. The stomach is indeed gas-filled and can be injured by a blast, so saying it is not affected would be inaccurate. The spleen can be injured by blast shock as well, but it’s not a GI hollow-viscera finding, and it isn’t “never” injured.