Figure 3From: Dexmedetomidine versus remifentanil in postoperative pain control after spinal surgery: a randomized controlled studyComparison of postoperative PCA use between the groups. PCA = patient-controlled analgesia; T1 = before PACU discharge; T2 = 2 hours after surgery; T3 = 8 hours after surgery; T4 = 24 hours after surgery; T5 = 48 hours after surgery. *P < 0.05.Back to article page