Study to compare the efficacy of thoracic epidural 0.125% bupivacaine and 0.125% bupivacaine with buprenorphine for postoperative analgesia in upper abdominal surgeries.
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Study to compare the efficacy of thoracic epidural 0.125% bupivacaine and 0.125% bupivacaine with buprenorphine for postoperative analgesia in upper abdominal surgeries.