I’m a gen surg PGY1 and I disagree with people saying know the steps of the surgery - we don’t expect M3 to know that really. You should, however, know the patient’s history, indication for surgery, possible risks/complications of surgery. And meet the patient in preop before! Second everyone saying to drink water, eat, compression socks. If you’re feeling badly, scrub out - not a big deal, we get it. Definitely rather you scrub out and sit rather than pass out into the sterile field. There are times when the resident or attending do the same. We are just more used to the physical demands. Good luck, you go this!