Effect of Intrathecally Administered Ketamine, Morphine, and Their Combination Added to Bupivacaine in Patients Undergoing Major Abdominal Cancer Surgery a Randomized, Double-Blind Study

Pain Medicine : the Official Journal of the American Academy of Pain Medicine
Ahmad Mohammad Abd El-RahmanMohamed A M Mostafa

Abstract

Effective postoperative pain control reduces postoperative morbidity. In this study, we investigated the effects of intrathecal morphine, ketamine, and their combination with bupivacaine for postoperative analgesia in major abdominal cancer surgery. Prospective, randomized, double-blind. Academic medical center. Ninety ASA I-III patients age 30 to 50 years were divided randomly into three groups: the morphine group (group M) received 10 mg of hyperbaric bupivacaine 0.5% in 2 mL volume and 0.3 mg morphine in 1 mL volume intrathecally. The ketamine group (group K) received 0.1 mg/kg ketamine in 1 mL volume instead of morphine. The morphine + ketamine group (group K + M) received both 0.3 mg morphine and 0.1 mg/kg ketamine in 1 mL volume intrathecally. Postoperative total morphine consumption, first request of analgesia, visual analog score (VAS), and side effects were recorded. Total PCA morphine was significantly decreased in group M + K compared with groups M and K. Time to first request of analgesia was prolonged in groups M and M + K compared with group K (P < 0.001). VAS in group M + K was reduced from two to 24 hours, and in group M from 12 and 18 hours postoperation compared with group K, with an overall good analgesia in ...Continue Reading

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