Opioid Sparing Effect of Thoracic Epidural Analgesia for Open Upper Abdominal Surgery

"Continuous epidural catheter (Portex ™, Epidural Minipack , Smiths Medical), infused with 0.0625% bupivacaine (Marcaine™, Aspen Holdings) with morphine (morphine M\&H™) 0.02 mg/ml 5 ml/h postoperative until POD3 morning Connected with The Sapphire ™ Infusion System Patient-Controlled-Analgesia (PCA) pump(fentanyl (fentanyl-Hameln™, Siam Bioscience): intravenous bolus mode only 15 ug/bolus, lockout interval 5 minutes, 4-hour limit 200 ug)~Postoprative analgesia: intravenous paracetamol (infulgan ™, Yuria-Pharm), tablet paracetamol (SaRa ™), Parecoxib (Dynastat ™, Pfizer), Etoricoxib (Arcoxia ™, MSD)"