Aortic dissection false lumen treatment with novel shape memory polymer devices

ABSTRACT In this case series, innovative shape memory polymer (SMP) devices were used to treat the aortic dissection false lumen (FL) of 5 patients. The open-cell, porous structure of expanded SMP contributes to its radiolucency, low radial force, and conformability. The devices were designed to address the unique needs of treating the FL: sufficiently large volume, detachable and stable to minimize migration risk, segmented for flexibility, and with a range of dimensions. All 5 cases were technically successful. A decrease in total aortic diameter, true lumen restoration, and FL reduction were observed through 6-12 month follow-up. The mean change in maximum aorta diameter from preoperative measurements was −5.8±6.9mm (30 days, n=5), −12.0±9.4mm (6 months, n=4), and −9.3±0.8mm (12 months, n=2). No SMP device/procedure-related complications occurred.