• Toshihiro Mashiko, Keisuke Otani, Ryutaro Kawano, Takehiko Konno, Naoki Kaneko, Yumiko Ito, and Eiju Watanabe.
• Department of Neurosurgery, Jichi Medical University, Tochigi, Japan. Electronic address: mashiko@jichi.ac.jp.
• World Neurosurg. 2015 Mar 1;83(3):351-61.

ObjectiveWe developed a method for fabricating a three-dimensional hollow and elastic aneurysm model useful for surgical simulation and surgical training. In this article, we explain the hollow elastic model prototyping method and report on the effects of applying it to presurgical simulation and surgical training.MethodsA three-dimensional printer using acrylonitrile-butadiene-styrene as a modeling material was used to produce a vessel model. The prototype was then coated with liquid silicone. After the silicone had hardened, the acrylonitrile-butadiene-styrene was melted with xylene and removed, leaving an outer layer as a hollow elastic model.ResultsSimulations using the hollow elastic model were performed in 12 patients. In all patients, the clipping proceeded as scheduled. The surgeon's postoperative assessment was favorable in all cases. This method enables easy fabrication at low cost.ConclusionSimulation using the hollow elastic model is thought to be useful for understanding of three-dimensional aneurysm structure.Copyright © 2015 Elsevier Inc. All rights reserved.

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