晚期肿瘤并发疼痛是肿瘤临床难题之一。按各家文献报告,疼痛发生率高达55～85％。国外近年来对肿瘤止痛多限于吗啡使用方法的研究,如采用硬膜外或蜘蛛膜下投药等等。国内由于对吗啡制剂的使用控制 Pain in late stage tumors is one of the clinical problems of tumors. According to various literature reports, the incidence of pain is as high as 55-85%. In recent years, studies on the use of morphine in the treatment of tumor pain have been studied abroad, such as epidural or subarachnoid administration. Domestic control over the use of morphine preparations