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Perfusion index (A) and bispectral index (B) during anesthesia. We extracted values prior to anesthesia (T1), at surgical incision (T2), at the end of surgery (T3), and after extubation (T4). Group N: patients with pain scores <7 in the PACU, Group P: patients with pain scores ≥7 in the PACU. PI: perfusion index, BIS: bispectral index, PACU: postoperative anesthesia care unit.
