目的比较经静脉注射病人自控镇痛(PCIA)和经硬膜外病人自控镇痛(PCEA)在开胸手术患者的应用效果。

Objective To compare the usage effect of patient Control Injection Ache (PCIA) and patient Control Extradural Ache (PCEA) in open-chest operation patients.

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目的观察术后硬膜外自控镇痛（PCEA）对全髋置换术患者的血液流变学的影响。

Objective To investigate the effect of postoperative patient controlled epidural analgesia(PCEA) on the hemorheology after total hip replacement surgery.

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