Objective: Observating the analgesic effect of three ladders pain analgesic to late cancer patients.
目的：观察三阶梯止痛对晚期癌症病人的止痛效果。
Methods: Using three ladders pain analgesic WHO introduced, that is the first ladder giving NSAIDs. The second weak opioid 'analgesics, the third strong opioid analgesics.
方法：应用世界卫生组织推荐的三阶梯止痛法，即第一阶梯给非激素类消炎镇痛药，第二阶梯给弱阿片类止痛药，第三阶梯给强阿片类止痛药。
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