| Abstract Scope |
Neurovascular implants such as flow diverters rely on extremely fine wires—typically 20 to 30 microns in diameter—braided into self-expanding structures. Developing absorbable versions of these devices may offer significant clinical advantages, including clearer long-term imaging and more straightforward reintervention. However, selecting a suitable material is complex, requiring careful balancing of mechanical properties (strength, elasticity), radiopacity for visibility under fluoroscopy, biocompatibility, and a predictable, appropriate corrosion profile. Common absorbable metal systems—including magnesium, zinc, iron, and molybdenum—each offer varying tradeoffs in these areas. This presentation highlights recent work with a patented FeMnN-DFT®-Mo composite wire system, in which 25-50 micron wires have achieved strengths exceeding 2.7 GPa. The design enables programmatic, multi-phase degradation driven by a galvanic interface formed between the FeMnN shell and the molybdenum core. This system offers a promising platform for thin absorbable medical devices requiring high strength, elasticity, and predictable corrosion. |