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Comparison of the postoperative analgesia effect between the two groups. A: VAS scores at rest of patients in group B (ropivacaine) at 4-48 h after surgery were lower than those in group A (fentanyl), P < 0.05; B: VAS scores at active and passive motion of patients in group B at 4-48 h after surgery were lower than those in group A, P < 0.05. *Compared with group A, P < 0.05.
