Factors affecting mortality rates in patients with abdominal vascular injuries

Background Major vessel injury is seen in 5% to 25% of patients admitted to hospitals with abdominal trauma, and this is the most common,cause of deat h in these patients. Methods: Data on 470 patients with abdominal vascular injuries seen at a Le vel I trauma center were reviewed retrospectively. Results: The overall mortality rate was 45%. The incidence of various types of trauma were blunt in 51 patients (11%), gunshot wounds in 329 patients (70%), shotgun wounds in 21 patients (4%), and stab wounds in 69 patients ( 15%), The three vessels with the highest mortality rates were aorta (at and proximal to the renals) (32 of 35 [91%]), hepatic veins and/or retrohepati c vena cava (36 of 41 [88%]), and portal vein (25 of 36 [69%]). The most si gnificant risk factors (p < 0.001) for death were a trauma score of 9 or le ss, initial operating room (OR) systolic blood pressure (SBP) < 90 mm Hg, f inal OR core temperature < 34 degreesC, 10 or more blood transfusions in th e first 24 hours, and an initial emergency department SEP < 70 mm Hg. Of 12 0 patients with an initial OR SEP < 70 mm Hg, 103 (86%) died. Of 29 patient s with a good response to a prelaparotomy thoracotomy with thoracic aortic cross-clamping (SBP > 90 mm Hg within 5 minutes), 11 (38%) survived. Of the remaining 87 patients, only 6 (7%) survived (p = 0.01). Conclusion: Rapid control of bleeding sites (to keep blood transfusions to < 10 units) and urgent correction of hypothermia seem to be the main factor s improving survival over which the surgeon has Some control.