Anesthesiologists are physicians who provide medical care to patients in a wide variety of situations. This includes a preoperative evaluation, consultation with the surgical team, creation of a plan for the anesthesia tailored to each individual patient, intra-operative life support and provision of pain control, intra-operative diagnostic stabilization, and proper post-operative management of patients. For anesthesiologists preparation of patients for emergency surgery is mandatory and essential. Because anesthesiologists are physicians, in contrast to other anesthesia providers, they are able to utilize their extensive knowledge of physiology, pharmacology and diseases to guide their decision making.