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  • Title: Pulmonary embolism following severe polytrauma: a retrospective study from a level I trauma center in China.
    Author: Wu Q, Wu J, Tian S, Gao W, Li Z, Bai X, Liu T.
    Journal: Eur J Trauma Emerg Surg; 2023 Aug; 49(4):1959-1967. PubMed ID: 37285034.
    Abstract:
    BACKGROUND: Trauma patients are at high risk of Venous thromboembolism (VTE), but compared to well-established deep venous thrombosis (DVT), data specifically evaluating post-traumatic pulmonary embolism (PE) are scarce. The aim of this study is to assess whether PE represents a distinct clinical entity with injury pattern, risk factors, and prophylaxis strategy different from DVT, among severe poly-trauma patients. PATIENTS AND METHODS: We retrospectively enrolled patients admitted to our level I trauma center from January 2011 to December 2021 who were diagnosed with severe multiple traumatic injuries and identified thromboembolic events among them. We regarded four groups as None (without thromboembolic events), DVT only, PE only, and PE with DVT. Demographics, injury characteristics, clinical outcomes, and treatments were collected and analyzed in individual groups. Patients were also classified according to the occurring time of PE, and indicative symptoms and radiological findings were compared between early PE (≤ 3 days) and late PE (> 3 days). Logistic regression analyses were conducted to explore independent risk factors for different VTE patterns. RESULTS: Among 3498 selected severe multiple traumatic patients, there were 398 episodes of DVT only, 19 of PE only, and 63 of PE with DVT. Injury variables associated with PE only included shock on admission and severe chest trauma. Severe pelvic fracture and mechanical ventilator days (MVD) ≥ 3 were the independent risk factors for PE with DVT. There were no significant differences in the indicative symptoms and location of pulmonary thrombi between the early and late PE groups. Obesity and severe lower extremity injury might have an impact on the incidence of early PE, while patients with a severe head injury and higher ISS are particularly at risk for developing late PE. CONCLUSION: Occurring early, lacking association with DVT, and possessing distinct risk factors warrant PE in severe poly-trauma patients special attention, especially for its prophylaxis strategy.
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