IRCT20220309054226N1 IRCT 2022-03-21 Esfahan University of Medical Sciences Comparison of the effect of local administration of bupivacaine and dexamethasone combination with bupivacaine administration only in postoperative pain in patients undergoing thoracotomy Comparison of the effect of local administration of bupivacaine and dexamethasone combination with bupivacaine administration only in postoperative pain in patients undergoing thoracotomy 2022-03-21 anticipated 40 Complete https://irct.ir/trial/62397 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: Block randomization to two groups of 20 people using Randomizer software. This is done by introducing the file number to the software and random allocation order into two groups of 20. This randomization was done by a trained person, but without interference in the research process, and output information is only observed by operating room technicians at the time of operation, Blinding description: Only surgical technicians are aware of the drug(s) that used and the doctor and patient are blinded. 2-3 Acute post-thoracotomy pain. Intervention 1: Intervention group: Local injection of 2.5 milligram bupivacaine (AuroMedics Pharma LLC, USA) and 0.2 milligram dexamethasone (Caspian Tamin, IRAN) per kilogram of body weight in the subpleural catheter. Intervention 2: Control group: Local injection of 2.5 milligram bupivacaine (AuroMedics Pharma LLC, USA). No - There is not a plan to make this available Justification or reason for not sharing IPD is Information is kept confidential