What is the description of the second hit phenomenon after polytrauma?

• A. Immediate infection
• B. No systemic inflammatory response
• C. A rapid healing response
• D. A delayed, excessive inflammatory response occurring days after injury

Answer: (D)

In polytrauma, the body mounts an inflammatory response to the initial injuries. If a new insult occurs later—such as a surgery, transfusion, infection, or another trauma—it can trigger a disproportionately large inflammatory reaction. This “second hit” is typically delayed, developing days after the first injury, and involves a surge of cytokines and immune activation that can lead to widespread inflammation and organ dysfunction.

That’s why the description of the second hit phenomenon is a delayed, excessive inflammatory response occurring days after injury. The other options don’t fit because they describe immediate infection, no inflammatory response, or a rapid healing process, none of which capture the delayed, amplified inflammatory cascade characteristic of the second hit.