Methods: Dyspnea in 23 cases of advanced cancer patients was all treated with morphine injected subcutaneously.The initial dose of morphine was 5 mg and the maximal dose was 10 mg.

• 方法：对23例晚期癌症呼吸困难患者皮下注射吗啡治疗，观察其呼吸困难缓情况。