Preoperative contrast-enhanced computed tomography. Computed tomography demonstrated the innominate artery was in contact with the trachea. Red and blue arrow shows tracheo-innominate artery fistula and the tip of cannula, respectively. IA; innominate artery, RIV; right innominate vein, LCA; left common carotid artery, LSA; left subclavian artery, LIV; left innominate vein