<unk>  or<unk>  procedure (from the , meaning to choose) is<unk>  that is scheduled in advance because it does not involve a medical emergency. Semi-elective<unk>  is a<unk>  that must be done to preserve the patient's life, but does not need to be performed immediately. By contrast, an urgent<unk>  is one that can wait until the patient is medically stable, but should generally be done within 2 days, and an emergency<unk>  is one that must be performed without delay; the patient has no choice other than immediate<unk>  if permanent disability or death is to be avoided.
Elective surgery
Preoperative care
Abdominal surgery
Preoperative fasting
Outpatient surgery
Colorectal surgery
Bloodless surgery
Image-guided surgery