Anesthesia Morphine -- Therapeutic use Surgery Analgesia Anesthesia -- methods Atelectasis Body mass index Cholecystectomy Ear plugs (Whales) Elective Endoscopic retrograde cholangiopancreatography Endoscopy Epidural anesthesia Femoral vein Gastroenterology Hemoglobin Hepatology Hypothermia Intraoperative Care Intratracheal anesthesia Intravenous anesthesia Intubation Laparoscopic surgery Laryngoscopy -- methods Local anesthetics -- Side effects Mortality Oxycodone Pain -- Treatment Pain Management -- methods Pain management Palpation -- methods Peridural anesthesia Postoperative period Protein Carbonylation Respiratory organs -- Diseases Sepsis Surgery -- Complications Throat -- Diseases Tracheotomy -- Patients -- Care postoperative period