The way it was dictated, I thought it was a Matrix II system. Nope.
Danek Medtronic METRx X-Tube System
It's a minimally invasive treatment system for spinal stenosis and disk herniation.
Posting these on my blog is really for my own edification, as by writing about it, I reinforce it in my memory, and of course I can find it again someday if I get stuck.