alexa The analgesic effect of epidural clonidine after spinal surgery: a randomized placebo-controlled trial.
Neurology

Neurology

Journal of Spine

Author(s): Farmery AD, WilsonMacDonald J

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Abstract BACKGROUND: Clonidine is an alpha(2) adrenoreceptor and imidazoline receptor agonist, which has analgesic, sedative, and minimum alveolar anesthetic concentration-sparing effects. It has been used orally, IV, and epidurally. In spinal surgery, there is a reluctance to use local anesthetic-based epidural analgesia postoperatively because of fears of masking important signs of nerve root or spinal cord injury. METHODS: We randomized 66 patients undergoing uncomplicated decompressive spinal surgery to receive an epidural infusion of either clonidine (Group C) or saline placebo (Group P) postoperatively. Morphine consumption by patient-controlled analgesia device was recorded for 36 h. RESULTS: Morphine consumption was significantly lower in Group C. The mean consumption at 36 h was 35 mg (95\% confidence interval 21-50 mg) in Group C, compared with 61 mg (95\% confidence interval 48-74 mg) in the control group. Nausea was significantly reduced in Group C (6.5\%), when compared with placebo (38.2\%). CONCLUSION: Low-dose epidural clonidine significantly reduced the demand for morphine and reduced postoperative nausea with few side effects. This article was published in Anesth Analg and referenced in Journal of Spine

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