In a client with a long-bone fracture, which finding suggests fat embolism?

• A. Petechia
• B. Fever
• C. Hypertension
• D. Tachycardia

Answer: (A)

Fat embolism syndrome happens when fat from the bone marrow enters the bloodstream after a long-bone fracture. These fat droplets can clog small vessels, especially in the lungs and skin. A key, characteristic sign is a petechial rash that appears due to tiny vessel occlusions and platelet involvement, usually within 24–72 hours after the injury. This makes petechiae the most specific clue among the options. Fever can occur but is nonspecific and can reflect infection or inflammation; tachycardia and hypertension are common stress responses and don’t specifically point to fat embolism.