This treatment uses the pure iron nitriding process, adding 0.05%wt nitrogen to the pure iron to improve the mechanical properties of the stent and ensure that the stent provides effective support during the vascular recovery period. Compared with the polylactic acid stent, it has better radial strength. It greatly reduces thrombosis or restenosis caused by insufficient support after implantation, providing patients with a safe and effective treatment plan.
Considering that the implant must maintain its integrity for a certain period of time, we inserted a nanometer-thick layer of pure zinc between the polylactic acid and the iron. Zinc is used as a sacrificial anode to ensure that the iron matrix is completely non-degraded before it absorbed, so as to protect the iron backbone from degradation in the early stage, prolong the effective support time, and facilitate blood vessel recovery.
We designed two gold radiopaque markers at both ends of the scaffold, which can help physicians complete precise positioning under OCT angiography.
Since the simple material of the iron scaffold, and 5000+ tests have shown that the material reduction further reduces the adverse effects of its magnetism on MRI, ensuring that the MR compatibility of the iron stent is the same as other permanent stents.
