• Bibi Bassa, Elizabeth Little, David Ryan, John Cronin, Frank Lyons, AinleFionnuala NiFNDepartment of Haematology, Mater Misericordiae University Hospital (MMUH), Eccles street, Dublin 7, Ireland. Electronic address: fniainle@mater.ie., and Tomas Breslin.
• School of Postgraduate studies, Royal College of Surgeons in Ireland, Ireland; Department of Trauma and Emergency Medicine, Mater Misericordiae University Hospital (MMUH), Eccles street, Dublin 7, Ireland. Electronic address: bibibassa22@rcsi.ie.
• Injury. 2024 Dec 1; 55 (12): 111964111964.

BackgroundVenous thromboembolism (VTE) is a common and in some instances life-threatening complication following severe traumatic injury. Owing to a lack of high-quality evidence in VTE risk prediction and prevention in this cohort, major trauma patients receive variable VTE preventative care. The aim of this systematic review was to determine the reported rates of VTE in major trauma patients, and associated risk factors.MethodsA comprehensive database search was conducted using EBSCO/MEDLINE, EMBASE, CINAHL, Cochrane and Scopus to identify studies published between 1990 and 2023. Original Studies quantifying the occurrence of and/or evaluating risk factors for VTE, PE and DVT in a defined population were eligible for inclusion. Five reviewers screened, appraised, and extracted data from the selected studies.ResultsA total of 22 studies fulfilled the inclusion criteria. Most studies were conducted in Northern America (72 %), followed by Asia (18 %), and Europe (9 %). Of the 22 studies, 17 were retrospective, 4 were prospective and 1 was the control arm of an RCT. The reported rates in included studies ranged from 0.39 % to 32 % (VTE), 0.59 % to 57.60 % (DVT) and 0.35 % to 24.0 % (PE). Operative procedure was the most consistently reported associated variable for DVT followed by delays to prophylaxis and pelvic injury. Lower extremity injury was the most frequently reported associated variable for PE followed by male sex and increased age. Age was the most frequently reported variable for both DVT and PE.ConclusionThere exists significant variation in the reported rates of VTE in major trauma patients globally. Operative procedure, delays to prophylaxis and pelvic injury were the most consistently reported associated variables for DVT. Lower extremity injury followed by male sex and increased age were the most frequently reported associated variables for PE. Although studies indicate possible differences in risk factors for DVT and PE, heterogeneity in study characteristics and outcome reporting impedes any meaningful conclusions. Reconciliation of VTE rates in major trauma patients is necessary when comparing populations.Copyright © 2024 Elsevier Ltd. All rights reserved.

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