Stent grafting simulation using a three-dimensional printed model for extensive aortic arch repair combined with coarctation.

Stent grafting for complex aortic anatomy remains a challenge. In particular, stent graft collapse (i.e. infolding) is possible when an excessive oversized device is needed. We describe a case of preoperative stent grafting simulation using a three-dimensional (3D) printed model for extensive aortic arch repair in a 69-year-old woman with multiple aneurysms combined with coarctation. The patient was scheduled to undergo staged hybrid repair. A stent graft larger than 28mm in diameter was needed to deploy into a coarctation of 15mm in diameter during the 2nd stage of the operation. Preoperative, experimental stent grafting using a 3D printed model indicated that infolding would likely not occur. Therefore, we proceeded with surgery, which was successful. This technology could be a useful application for planning complicated stent grafting.