[Side effects of subarachnoid and epidural sufentanil associated with a local anesthetic in patients undergoing labor analgesia.].

Background And Objectives: The association of an opioid with a local anesthetic improves the quality of labor analgesia and reduces the risk of systemic toxicity of the local anesthetic. However, opioids are not devoid of side effects. The aim of this study was to compare the side effects of subarachnoid sufentanil associated with bupivacaine to those caused by epidural sufentanil associated with ropivacaine in the doses used in the Anesthesiology Department in pregnant women undergoing labor analgesia.