Nancy is out of surgery. The surgeon just called me to let me know that it went fine.
They did a full laminectomy on two vertebrae, and a partial on the third, in order to access and drain the full abscess. She is coming back to the ICU in about 20 minutes, so I will get to see her shortly. I'll send another update this evening.
Thank you all for your notes, your encouragement, prayers, all kinds of support. You and your help mean a lot to both of us.