Fig. 1

A 93-year-old woman with ascending colonic hemorrhage due to colonic diverticulosis. a Selective angiography of the ileocolic artery. Clear extravasation appears (white arrowhead); however, the catheterization of the bleeding vasa recta is not achieved. b Single shot while embolizing with the IPM/CS mixture; the microcatheter during embolization is located at the marginal artery of the bleeding site. We injected the IPM/CS mixture to distribute not only to the bleeding vasa recta but also to the surrounding vasa recta and the marginal artery. c Selective angiography of the ileocolic artery after the embolization using the IPM/CS mixture. The clear extravasation disappears and the blood flow to the bleeding straight artery and surrounding straight arteries is blocked (wave circled)