Conclusion: Continuous epidural analgesia could improve pulmonary function after operation and promote oxygenation in lung, so it is a good postoperative analgesia method.
结论：连续硬膜外镇痛可明显改善术后肺功能，促进肺内氧合，是一种较好的术后镇痛方法。
Objective To study the analgesia effect after operation with varied dosage of TRAMADOL.
目的研究不同剂量曲马多对术后镇痛的效果。
Conclusion: the epidural space block anesthesia is superior to regular injection analgesia, and has a protective effect on cardiovascular system after operation, worthy of applying to clinic.
结论：硬膜外阻滞法镇痛效果优于常规注射法，且对术后病人的心血管系统有明显的保护作用，值得临床广泛应用。
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