Comparison of the Effect of Intrathecal Morphine and Intrathecal Fentanyl as Adjuvants to 0.5% Levobupivacaine in Total Knee Replacement Surgery
Background: Intrathecal opioids are commonly used as adjuvants to local anaesthetics to prolong spinal analgesia. Morphine (hydrophilic) provides prolonged analgesia; fentanyl (lipophilic) provides rapid onset but shorter duration. This study compared intrathecal morphine and fentanyl as adjuvants to 0.5% hyperbaric le...