The fact that he was prostrated, lucid, but suffered intense pain best sustains the hypothesis of a pelvic fracture. After the initial period, one of the most common causes of death resulting from a pelvic fracture is deep venous thrombosis with secondary pulmonary thrombo-embolism.
The fact that he was lying down and still conscious but in intense pain supports the hypothesis of a pelvic fracture. After the initial period, one of the most common causes of death resulting from a pelvic fracture is deep venous thrombosis with secondary pulmonary thromboembolism.