 Vascular cast is a device used to reduce the risk of stenosis after vane to artery grafting surgery. It consists of a bridge structure which supports the cast and prevents stress concentration at the site of the graft. This bridge structure allows for better laminar and helical flow, promotes healthy endothelial cell alignment, and improves muscle contraction. Computational modeling and ex vivo testing have shown that this device reduces the risk of stenosis and improves patency. This article was authored by Hayansu Ha, Ju Young Park, Chan Hee Lee, and others.