Aortic dissection false lumen treatment with novel shape memory polymer devices

In this case series, innovative shape memory polymer (SMP) devices were used to treat the aortic dissection false lumen (FL) of five 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 five cases were technically successful. A decrease in total aortic diameter, true lumen restoration, and FL reduction were observed through 6- to 12-month follow-up. The mean changes in maximum aorta diameter from preoperative measurements were −5.8 ± 6.9 mm (30 days, n = 5), −12.0 ± 9.4 mm (6 months, n = 4), and −9.3 ± 0.8 mm (12 months, n = 2). No SMP device/procedure-related complications occurred.