Figure 31d. CT-angiographic correlation for detection of bleeding from the obturator artery. (a) CT scan shows a fracture of the anterior right acetabulum (arrow) and extravasation of contrast material (arrowheads) within a hematoma of the pelvic sidewall. These CT findings are suggestive of bleeding from the obturator artery. (b) Superselective angiogram obtained with a microcatheter (arrowheads) shows active bleeding (arrow) from a branch of the right obturator artery and vertical fractures of the superior and inferior pubic rami. (c) Right internal iliac arteriogram obtained after embolization of the bleeding branch with gelatin sponge (Gelfoam; Pharmacia & Upjohn, Kalamazoo, Mich) and a microcoil (arrowhead) shows no further extravasation. (d) Selective left internal iliac arteriogram shows active hemorrhage at the same site (arrow) supplied from the left obturator artery. The left obturator artery was embolized with gelatin sponge and coils. (e) Left internal iliac arteriogram obtained after embolization shows occlusion of the left obturator artery (arrow) and no hemorrhage.