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大多数癌痛病人可通过口服麻醉性镇痛药合并其它非阿片类药使疼痛得到缓解，但长期应用，随着剂量增大，将出现各种副作用和耐药性。作者运用经硬膜外腔病人自控镇痛（ｐａｔｉｅｎ－ｃｏｎｔｒｏｌｌｅｄ ｅｐｉｄｕｒａｌ ａｎａｌｇｅｓｉａ，ＰＣＥＡ）给药可减少麻醉药
Most cancer patients can relieve pain by oral anesthetic analgesics combined with other non-opioid drugs, but long-term use, with increasing doses, will have various side effects and drug resistance. The authors use a patient-controlled epidural analgesia (PCEA) in the epidural space to reduce anesthetic