Edwards Lifesciences Anastaflo Intravascular Shunt, Model code IVS12512, IVS1512, IVS17512, IVS2012, IVS2512, IVS3012, IVS1530, IVS2030 and IVS25 || Anastaflo shunts are intended for use in preventing ischemia by shunting and/ or perfusing blood or cardioplegic solution distal to the anastomosis site during the construction of coronary artery bypass grafts30.