What to ask at pre-op?
OK, so there may be a standard order set for patients with T2DM. Ask about this at your pre-op appointment. If they do use a standard order set, ask what orders they include.
Blood Glucose testing: For example, there may be a standard requirement for blood glucose (BG) testing (such as fasting and every 4 hours), along with standard treatment orders for BG's above and below certain pre-determined parameters. So you may receive insulin if your BG goes above a certain level, and likewise, you may be given a snack (some crackers) if it goes below a certain level.
Diet: Also be sure to ask about the diet order. Do they order a 'consistent carbohydrate' diet for patients with T2DM? If so, it will in all likelihood contain way more carbs than you are used to eating. Ask for the number of carbohydrates per meal (and don't be surprised if it is along the lines of 60gm/65gm/60gm for the 3 main meals of the day

).
In general, standard hospital T2DM order sets do not take the needs of those of us who follow a sensible LCHF approach to managing our illness into account. Definitely bring your low carb stash along with you, and eat what you know you can eat from your tray!
Also, have the fridge stocked with food you can eat for when you get home as you may be off your feet for a while! Good luck with everything!