Risk Factors and Management of Blunt Inferior Vena Cava Injury: A Retrospective Study.

Background: Traumatic inferior vena cava (IVC) injuries are uncommon, but the mortality rate remains high at 38-70%. To date, most studies on traumatic IVC injuries have evaluated blunt rather than penetrating injuries. We aimed to identify the clinical features and risk factors that affect the prognosis of patients with blunt IVC injuries to improve treatment strategies for these patients.

Methods: We retrospectively analyzed patients diagnosed with blunt IVC injury over 8 years at a single trauma center. Clinical and biochemical parameters; transfusion, surgical, and resuscitation methods; associated injuries; intensive care unit stay; and complications data were compared between survival and death groups to identify clinical features and risk factors of blunt IVC injury-related mortality.

Results: Twenty-eight patients with blunt IVC injury were included during the study periods. Twenty-five (89%) patients underwent surgical treatment, and the mortality was 54%. The mortality rate according to the IVC injury location was the lowest for supra-hepatic IVC injury (25%, n = 2/8), whereas it was the highest for retrohepatic IVC injury (80%, n = 4/5). In the logistic regression analysis, Glasgow Coma Scale (GCS) (odds ratio [OR] = 0.566, 95% confidence interval [CI] [0.322-0.993], p = 0.047) and red blood cell (RBC) transfusion for 24 h (OR = 1.132, 95% CI [0.996-1.287], p = 0.058) were independent predictors for mortality.

Conclusions: Low GCS score and high-volume packed RBC transfusion requirements for 24 h were significant predictors of mortality in patients with blunt IVC injuries. Unlike IVC injuries caused by penetrating trauma, supra-hepatic IVC injuries caused by blunt trauma have a good prognosis.