Which of the following is a sign of a fracture?

• A. Crepitus
• B. Joint laxity
• C. Bruising
• D. Increased range of motion

Answer: (A)

Crepitus signals a fracture because when a bone is broken, the ends can rub against each other or air and tissue gases can crackle under the skin, producing a crackling sensation or sound as you palpate or move the limb. That crackling is a classic clue that the bone integrity is compromised, so it’s the most specific sign among the options.

The other signs fit other injuries better. Joint laxity suggests a ligament injury or dislocation rather than a fracture because it reflects abnormal joint movement rather than a broken bone. Bruising can accompany many injuries, including fractures, but it isn’t specific to fractures. Increased range of motion is unlikely with a fracture since pain, swelling, and bone fragment contact typically limit movement rather than increase it.