I've got sporadic Internet access tonight but I wanted to respond quickly...
The immediate post-surgery (injury)period of about a week or two typically calls for about a 20% boost in PRO/ kcal for healing. Going this high may not be necessary for those who already eat a lot. A multi-vite/mineral isn't a bad idea either (e.g. vitamin C and zinc for soft tissue repair, etc., etc.)
I like the comment about doing some upper body work after a bit of recovery. Slow negatives (like light dumbell bench press with feet up) aren't jarring and can boost RMR considerably (soreness) after a few weeks of patience and rest. This matters because of the exercise (kcal expenditure) limitations that have been pointed out.
Alas, I'll be in the same boat after next week's ankle surgery. Ugh. If you'd like, I can tell you more about the pseudo-routine I'm planning (via PM).