Aim: to investigate the effects of patient controlled epidural analgesia (PCEA) on endocrine, respiratory and circulatory function in the elderly after upper abdominal surgery.
目的：观察老年病人上腹部术后硬膜外自控镇痛(PCEA)对内分泌及呼吸和循环功能的影响。
Aim: to investigate the effects of patient controlled epidural analgesia (PCEA) on endocrine, respiratory and circulatory function in the elderly after upper abdominal surgery.
目的：观察老年病人上腹部术后硬膜外自控镇痛(PCEA)对内分泌及呼吸和循环功能的影响。
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