A novel polymeric transcatheter aortic valve demonstrated favorable in vitro hydrodynamics, 200 million cycle durability, and stable in vivo hemodynamics with no calcification over 90 days in sheep.
A novel polymeric TAVI valve demonstrated favorable durability, hydrodynamics, and biocompatibility in bench and ovine models, supporting further development toward first-in-human trials.
Abstract Current transcatheter aortic valve implantation (TAVI) systems use glutaraldehyde-fixed tissue leaflets, which are prone to structural valve degeneration. Polymeric valves may improve durability, hemocompatibility, and manufacturability. We designed, produced, and evaluated a self-expanding nitinol-framed TAVI device with siloxane poly(urethane-urea) (SiPUU) leaflets and an electrospun SiPUU skirt. Bench testing included frame fatigue to 200 million cycles, hydrodynamics per ISO 5840-3, and flow visualization using particle image velocimetry. Biocompatibility was assessed per ISO 10993. Preclinical evaluation involved nine ovine implants with serial imaging and histology to 90 days. In vitro tests showed EOAs of 1.3–1.5 cm² and 1.7–2.1 cm² (21 and 24 mm annulus, respectively, simulating under expansion), regurgitant fraction <6%, and preserved coaptation. Six animals completed follow-up with stable hemodynamics, no hemolysis, no PVL at implant, and no calcification at explant. The SiPUU-based TAVI demonstrated favorable durability, hydrodynamics, and biocompatibility, supporting further testing and delivery refinement toward first-in-human evaluation. Clinical Trial: N/A
Stanfield et al. (Mon,) conducted a other in Aortic valve disease (n=9). Polymeric transcatheter aortic valve implant (TAVI) with SiPUU leaflets was evaluated on Hydrodynamic performance, durability, and in vivo hemodynamics. A novel polymeric transcatheter aortic valve demonstrated favorable in vitro hydrodynamics, 200 million cycle durability, and stable in vivo hemodynamics with no calcification over 90 days in sheep.