Meditool Shanghai Enterprise Co., Ltd. 1 article published in JoVE Medicine Three-Dimensional Printing of a Complex Aortic Anomaly Xiaoning Sun1,2, Kai Zhu1,2, Weijia Zhang1,2,3,4, Hongqiang Zhang1,2, Fazong Hu5, Chunsheng Wang1,2 1Department of Cardiac Surgery, Zhongshan Hospital, Fudan University, 2Shanghai Institute of Cardiovascular Disease, 3State Key Laboratory of Molecular Engineering of Polymers, Fudan University, 4Institutes of Biomedical Sciences, Fudan University, 5Meditool Shanghai Enterprise Co., Ltd. Here, we present a protocol to use three dimensional printed models for pre-operative planning and intra-operative reorganization of complicated vascular locations when handling a congenital aortic anomaly.