Postoperative pain relief
consolability, Pain, pain
After the operation, extubation was performed, and then the patients were transferred to the surgical intensive care unit (SICU). Patients in both groups received nurse-controlled analgesia (NCA) via an intravenous analgesia pump. The drug used for analgesia was 1 µg/kg sufentanil in saline (100 ml). The background dose was 0 ml, the NCA dose was 4 ml (sufentanil 0.04 μg/kg), and the lock time was 20 min. Pain was assessed by observing the face, legs, activity, cry, and consolability (FLACC). An FLACC score ≥ 4 indicated moderate pain, and the nurse pressed the analgesia pump to control the drug administration; an FLACC score ≥ 7 indicated severe pain, and oral paracetamol was administered for remedial analgesia. The consort diagram is shown in Fig. CONSORT flow diagram