Results: Effective in enhancing pain relief during surgery, the amount of fentanyl consumed was 212.51 ± 71.58 μg. Postoperative period the average VAS score at rest, and dynamic < 4; 5 patients (16.7%) needed additional intravenous PCA morphine, with the amount consumption in 24h, 48h, 72h, respectively: 4mg, 8mg, 14.2mg.