Objective:To compare the clinical efficacy and safety of fentanyl per patient-controlled analgesia(PCA) intravenous- ly and intravenous morphine(CAT) after cardiac surgery.
目的：对比研究心外科术后静脉芬太尼病人自控镇痛（PCA）与传统间断肌肉注射镇痛（CAT）的临床效果及安全性。
Patient-controlled regional analgesia (PCRA) is a new analgesic method composed of regional nerve block and PCA.
应用区域神经阻滞并结合自控镇痛形成患者自控区域镇痛，是一种新的镇痛方法。
The basic tenet of PCA is that analgesia is better when the patient, as opposed to the nurse or physician, is in control. This may not apply to all individuals.
PCA的基本宗旨：当患者在没有失去控制的情况下抵触护士或医师时，止痛法更好一些。
The basic tenet of PCA is that analgesia is better when the patient, as opposed to the nurse or physician, is in control. This may not apply to all individuals.
PCA的基本宗旨：当患者在没有失去控制的情况下抵触护士或医师时，止痛法更好一些。
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