疼痛是恶性肿瘤病人最痛苦的症状之一。据世界卫生组织统计 ,目前全世界每年新发生的癌症患者约有 70 0万 ,其中 30～ 50 %伴有不同程度的疼痛。我国每年癌症发病人数约 16 0万 ,伴有不同程度疼痛占 51.1%。由于整个社会 ,甚至医务人员对这一问题认识不足 ,致使在世界范围内有 Pain is one of the most painful symptoms of a malignant tumor patient. According to the statistics of the World Health Organization, there are about 7,000 new cancer patients newly occurring in the world each year, of which 30 to 50% are accompanied by varying degrees of pain. The number of cancer cases in China is about 160 million each year, with varying degrees of pain accounting for 51.1%. Due to the lack of understanding on this issue by the entire community and even the medical staff, this has led to the worldwide