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Korean Journal of Anesthesiology 2008;55(1):107-110.
DOI: https://doi.org/10.4097/kjae.2008.55.1.107   
Spinal myoclonus on upper extremities following spinal anesthesia: A case report.
Kyoung Mi Kim, Jin Sun Yoon, Hyun Sung Cho, Mi Sook Gwak
Department of Anesthesiology and Pain Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. jinsun.yoon@samsung.com
Clonic movement is a rare complication that occurs after neuraxial blockade. We report our experience with an 18-year-old man developing myoclonic movement on his both upper extremities following intrathecal injection of 0.5% hyperbaric bupivacaine for varicocelectomy. One and half hour after spinal anesthesia, he developed bilateral, rhythmic myoclonic movements on upper extremities. Two days after surgery, neck flexion was observed. Symptoms sustained for about one month but frequency and severity of clonic movement had been reduced by anticonvulsants and muscle relaxant therapy. Four weeks later, he recovered without any complication.
Key Words: complication; spinal anesthesia; spinal myoclonus


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