Cardiovascular complications of noncardiac surgery may be one of the major causes of perioperative morbidity and mortality. Therefore, perioperative assessment and management of cardiovascular patients undergoing noncardiac surgery are of utmost importance.

Perioperative aspiration is the phenomenon of gastric reflux into the airway before, during and after surgery. If perioperative aspiration is food particles, foreign objects, especially gastric acid, it can cause burns, thickening and obstructing the conduction and exchange of oxygen in the respiratory tract. Therefore, measures must be taken to prevent perioperative aspiration.