Preliminary Intraoperative Validation of the Nociception Level Index

The NoL index changes proportionately with patients' response to various clinical and experimental noxious stimuli and discriminates noxious from nonnoxious stimuli with high sensitivity and specificity. The NoL index also responds progressively to increasing stimuli intensity and is appropriately blunted by analgesic administration. The NoL index was superior to other compared measures and appears to accurately characterize nociception during general anesthesia.