Traumatic injury of the internal mammary artery: embolization versus surgical and nonoperative management.

The purpose of the study was to compare the outcomes, complications, and effectiveness of embolization versus surgical and nonoperative management in patients with injury to the internal mammary artery. Eighteen cases of angiographically proven internal mammary artery injury were identified by a retrospective review. Patient age range was 17-71 years (mean 34 years). Causes of vascular injury were equally divided (9 each) between penetrating and blunt trauma. Type of trauma, associated injury, plain film findings, treatment complications (immediate and delayed), and overall outcomes were assessed. Results of embolization versus surgical and nonoperative management were compared. Angiographic findings included occlusion, active hemorrhage, and pseudoaneurysm of the internal mammary artery. Of the 18 patients studied, 12 underwent embolization; 2 underwent surgical ligation, and 4 were managed by nonoperative observation. No patient died as a direct result of vascular injury; one died of renal failure unrelated to chest trauma and one other died of myocardial contusion. One patient who underwent embolization had delayed bleeding and two patients with conservative management developed a delayed hemothorax. This small series demonstrates that embolotherapy offers an effective, efficient, and safe alternative to conventional surgical management of internal mammary artery injuries.