ORNAC’s Guidelines for Perioperative Practice in Canada serve as a reference and guide for perioperative nurses, health care facilities caring for surgical patients, professional associations, and other organizations involved in surgical services. These guidelines represent recommended practices based on the best-available evidence to help perioperative nurses deliver optimal patient care in the perioperative setting. Considering the diverse practice areas and roles across the country, the ORNAC Guidelines are an important tool in the clinical decision-making process.