Question:
Which of the following is a type of blunt-force mechanical injury produced without a break in the continuity of the skin?
Which of the following is a type of blunt-force mechanical injury produced without a break in the continuity of the skin?
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A closed bruise from blunt trauma with intact overlying skin.
Updated On: Jun 25, 2026
- Stab wound of the abdomen
- Laceration
- Bomb blast injury
- Contusion
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The Correct Option is D
Solution and Explanation
Step 1: Classify mechanical injuries. Mechanical injuries are broadly abrasions, contusions (bruises), lacerations, incised/stab (sharp-force) wounds, and firearm/blast injuries. The question asks for a blunt-force injury where the skin surface remains intact (a closed injury).
Step 2: Define contusion. A contusion (bruise) is an extravasation of blood into the tissues due to rupture of small vessels following blunt impact, with the overlying skin remaining unbroken. It is a closed blunt-force injury.
Step 3: Why the others are wrong. A stab wound is a sharp-force penetrating injury that breaks the skin. A laceration is a blunt-force tear of the skin/tissues - it does break the continuity of the skin (so it is open). A bomb blast produces complex injuries (blast, penetrating, burns) with skin disruption. Therefore, contusion is the blunt-force injury without a breach of the skin.
Step 2: Define contusion. A contusion (bruise) is an extravasation of blood into the tissues due to rupture of small vessels following blunt impact, with the overlying skin remaining unbroken. It is a closed blunt-force injury.
Step 3: Why the others are wrong. A stab wound is a sharp-force penetrating injury that breaks the skin. A laceration is a blunt-force tear of the skin/tissues - it does break the continuity of the skin (so it is open). A bomb blast produces complex injuries (blast, penetrating, burns) with skin disruption. Therefore, contusion is the blunt-force injury without a breach of the skin.
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