Poetic license, I am sure the stents would have to be made from Titanium, so that MRI's can be taken during and after the surgery and when needed for MS MRI's.

Stainless steel sometimes has a nickel coating on them, like with injectable needles (syringes), it makes them smooth on the surface so they enter the skin easier. Nickel is in so many things. I am allergic to that too.

I thought that was why the Copaxone was causing me such bad site reactions, from the needles and the "new smaller, easier to use needles that don't have the burrs on them."