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Revista da Associação Médica Brasileira

versão impressa ISSN 0104-4230versão On-line ISSN 1806-9282

Resumo

SALGADO, Paula Fialho Saraiva et al. Synergistic effect between dexmedetomidine and 0.75% ropivacaine in epidural anesthesia. Rev. Assoc. Med. Bras. [online]. 2008, vol.54, n.2, pp.110-115. ISSN 0104-4230.  http://dx.doi.org/10.1590/S0104-42302008000200011.

BACKGROUND: This study aimed to evaluate clinical characteristics of epidural anesthesia performed with 0.75% ropivacaine associated with dexmedetomidine. METHODS: Forty patients scheduled for hernia repair or varicose vein surgeries under epidural anesthesia participated in this study. They were assigned to: Control Group (n = 20), 0.75% ropivacaine, 20 ml (150 mg); and Dexmedetomidine Group (n = 20), 0.75% ropivacaine, 20 ml (150 mg), plus dexmedetomidine, 1 mg.kg-1. The following variables were studied: total analgesic block onset time, upper level of analgesia, analgesic and motor block duration time, intensity of motor block, state of consciousness, hemodynamics, postoperative analgesia and incidence of side-effects. RESULTS: Epidural dexmedetomidine did not affect onset time or upper level of anesthesia (p > 0.05) however it prolonged sensory and motor block duration time (p < 0.05) and postoperative analgesia (p < 0.05), and also resulted in a more intense motor block, l (p < 0.05). Values of bispectral index were lower in Dexmedetomidine Group (p < 0.05). There was no difference in incidence of hypotension and bradycardia (p > 0.05). Occurrence of side-effects (shivering, vomiting and SpO2 < 90%) was low and similar between groups (p > 0.05). CONCLUSION: There is clear synergism between epidural dexmedetomidine and ropivacaine, further this drug association does not bring about additional morbidity.

Palavras-chave : Anesthetics; Ropivacaine; Analgesics; Dexmedetomidine; Anesthetic techniques; Epidural block.

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