Initial Risk Stratification of Liver Injuries Based on Elevated Transaminases in a Medical Resource-Constrained Area

Abstract

Liver injuries after blunt abdominal trauma vary from mild contusions to life-threatening damage, indicating that initial risk stratification of liver injuries is critical to improve clinical outcomes, especially in a medical resource-constrained area. This study analyzed 148 patients who underwent abdominal and chest computed tomography with elevated transaminases, with suspected liver injury after blunt abdominal trauma, between January 2008 and December 2017. The mean age was 49.6 (standard deviation 17.2) years; most patients were men (69.6%). The most common cause of trauma was motor vehicle accidents (55.4%), followed by falls (27.7%) and assault (11.5%). Patients with no liver injury (n = 63, 42.6%) and those with American Association for the Surgery of Trauma (AAST) grades I (n = 11, 7.4%) and II (n = 15, 10.1%) were treated with non-operative management. However, 2.8% of patients with AAST III (n = 36, 24.3%), 29.4% with AAST IV (n = 17, 11.5%), and 50.0% with AAST V (n = 6, 4.1%) required trans-arterial embolization, and patients with AAST IV and V had 11.8% and 33.3% mortality rates, respectively. Predictors for major liver injury (AAST IV and V) were aspartate aminotransferase ≥ 450 IU/L (p < 0.0005) and international normalized ratio ≥ 1.2 (p = 0.028). In conclusion, these laboratory values enable an initial risk stratification of liver injuries after blunt abdominal trauma that early appropriate treatment and, if not possible, a prompt transfer to a capable facility would be considered in patients who had the predictors of major liver injury.