Surgery Anesthesia Morphine -- Therapeutic use Analgesia Anesthetics -- pharmacology Atelectasis CPR (First aid) Cardiac arrest Cardiopulmonary bypass Chemical Elements Ear plugs (Whales) Elective Hypothermia Intraoperative Care Intratracheal anesthesia Intravenous anesthesia Mortality Nausea -- Treatment Nebulizers and Vaporizers Neurosurgery Oxycodone Pain -- Treatment Pain Management -- methods Peridural anesthesia Pneumonia -- Diagnosis Postoperative care Postoperative period Protein Carbonylation Respiratory organs -- Diseases Sepsis Spinal anesthesia Vitrectomy Vitreous body -- Surgery Vomiting -- Treatment