I just spoke to Ellen on the phone. The “surgery” is basically to clean out the wound because they think there’s some muck in there that is stopping it healing properly. I’ll call back this afternoon to see how it went. Pat may have updates on Facebook before then.
By the way, Ellen says please stop emailing her with good wishes – she can’t get online and her in box is filling up. If it reaches the limit something important might get bounced. Maybe stick a comment on her LiveJournal or something instead.