IntraStent DoubleStrut LD - Balloon Expandable Biliary Stent, Sterilized EO, ev3 4600 Nathan Lane North, Plymouth, MN 55442-2920 USA. The IntraStent DoubleStrut LD Biliary Stent is a balloon expandable stent. It is intended as a permanently implanted device. The stent is made from a 316L stainless steel tube cut into an open lattice design. It is designed to be crimped onto a non-compliant PTA balloon catheter that is indicated for biliary stent expansion. After mounting onto a balloon catheter, it is deployed and expanded by inflating the balloon.