In this observational cohort of 247 trauma patients who underwent both CTA (pulmonary arteries) and CTV (pelvic/leg veins), of the 46 with PE, only 7 (15%) also had a DVT. Possible explanations include complete embolism, insensitivity of CTV, upper extremity source, or de novo pulmonary artery thrombus. Regardless, a high percentage of trauma patients with PE will have no detectable DVT (abstract).

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