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A 30-year-old male is admitted to the hospital after a motorcycle accident that resulted in a fracture of the right femur. The fracture is man- aged with traction. Three days later the patient becomes confused and tachypneic. A petechial rash is noted over the chest. Lungs are clear to aus- cultation. Arterial blood gases show PO2 of 50, PCO2 of 28, and pH of 7.49. The most likely diagnosis is

  1. Unilateral pulmonary edema

  2. Hematoma of the chest

  3. Fat embolism

  4. Pulmonary embolism

  5. Early Staphylococcus aureus pneumonia 

 

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c. Fat embolism
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