The Bispectral Index (BIS) is a processed electroencephalographic parameter that correlates with the sedative-hypnotic actions of anaesthetic drugs. Dexmedetomidine and lidocaine have both opioid sparing effects. Their influence in laparoscopic surgery has not been studied yet. We investigated their effect on perioperative opioid consumption, cognitive function and incidence of neuropathic pain.

Keywords: bispectral index, dexmedetomidine, lidocaine

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