A 32-year-old man wass involved in a high speed motorcycle accident. He sustained multiple injuries, including a pelvic fracture and an open left femur fracture. He was taken urgently to the operating room for irrigation and debridement of his wounds. They were unable to stabilize his fractures at the time of admission because he is medically unstable. On the second day in the hospital, he was doing well, however later that evening, he becomes confused, tachypneic, dyspneic, and develops petechiae. An electrocardiogram is normal. Chest X-ray were normal. Which of the following is the most likely diagnosis?