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The aim of this study was to evaluate the potential analgesic effect of epidural methylprednisolone (MP) after posterolateral thoracotomy (PLT). Adult male patients undergoing PLT for lung surgery were included in a prospective, randomized, double blind study. Peroperative analgesia (bupivacaine plus sufentanil) was given by a thoracic epidural catheter associated with general anaesthesia. After surgery, patients received either MP 1 mg kg(-1) followed by a continuous epidural infusion of MP 1.5 mg kg(-1) during 48 h (MP group) or 0.9% saline as a bolus injection and continuous epidural infusion (P group). Additional morphine analgesia was administered by i.v. patient-controlled analgesia. Pain was assessed at rest and with mobilization every 4 h after operation during 48 h with a visual analogue scale (VAS). The primary end-point was the total morphine requirements during the 48 first postoperative hour. Twenty-four patients were allocated to MP (n=12) and P (n=12) groups. Characteristics of the two groups were similar. There were no differences between groups for morphine requirements (median and interquartile range) during the 48 h: 59 mg (40-78) in MP group vs 65 mg (59-93) in P group. There were no differences between groups for morphine requirements every 4 h during the 48 h and VAS for pain at rest and evoked pain. No side effects were reported. It was concluded in this small study that these results did not support the use of epidural steroids for postoperative analgesia after PLT.

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