Casati, A Implementing sevoflurane anesthesia with small doses opioid for upper abdominal surgery. Postoperative respiratory function after either remifentanil or fentanyl. [electronic resource] - Minerva anestesiologica Sep 2001 - 621-8 p. digital Publication Type: Clinical Trial; Journal Article; Randomized Controlled Trial ISSN: 0375-9393 Subjects--Topical Terms: Abdomen--surgeryAdjuvants, AnesthesiaAdultAgedAnalgesia, EpiduralAnesthesia, InhalationAnesthetics, InhalationFemaleFentanylHumansMaleMethyl EthersMiddle AgedNarcoticsPiperidinesProspective StudiesRemifentanilSevoflurane