I have been back to work for 3 months. I also had the same concerns and I ate pretty much the same as you pre surgery, skip breakfast, eat lunch, then eat from 6pm ----till?
I have not had your complications by far, but had my fair share and worried whether I'd be able to even sit at a desk for more than a few mins without having to run to the restroom. After my revision, I stayed at home getting better and once I felt confident that I was better, could hold my own nutrionally speaking and work, I did so.
Main thing is to alway plan ahead. It's a new thing to me, obviously if you look at my previous habits. That is one huge difference for me now, is that I have to think about myself. I also have my vites for the day brought in 30 days at a time and in my desk.
First thing is, I do have to get up early and make sure I have plenty of time to use the bathroom a few times. That isn't any complication anymore, it's just normal ds bowel movements for me. I also know which restroom I can run to during the day if I have to go again, that happens sometimes with our makeup.
Eating. I eat/drink all day long. I keep food, shake mixes and flavorings for those shakes, as well as the shaker bottles at wor****ep mayo in the fridge, tuna in my desk for a backup for a quick bowl of tuna, which I usually have a can of a day, besides shakes/meals. I can take in a few eggs in a bowl, a few slices of mircowave bacon and have it on first break if I am running behind. (I don't mind nuked scrambled eggs)
Liquids. We are provided with ice, tea, coffee and splenda at work. I use the coffee/ice to make shakes. I use the tea to make fresh splenda tea all day long by brewing it and pouring it over ice.
Lunches are usually leftovers from home, tuna, tilapia, salad or homemade soup. I make up a huge batch of soup or chicken salad and take it in everyday.
ETA: forgot to mention that work is not a place to experiement. Know how your react to a food prior to eating it at work. I had an "oreo ball" a co-worker brought in for a luncheon, and I knew it'd been a better idea to try it at home...phew...that wasn't a nice experience.
5'1 HW 298 CW 118
"Making America skinny, one slap atta time!" -Slap Chop Dude