喘鸣系指由气道分泌物引起不用听诊器即可直接闻及的气管或支气管内的一种杂音。癌症患者的死前喘鸣,除肺癌等呼吸道疾病外,还可在呼吸系统以外,特别是各种癌症晚期经常见到,并且是死亡前的体征之一。一、发病机理癌症患者的死前喘鸣,可由以下情况引起,即肺癌本身、其他晚期癌症转移至肺或伴有肺炎等呼吸道 Breathing refers to the murmur of the trachea or bronchi, which is caused by airway secretions and can be heard directly without a stethoscope. Premature death in patients with cancer, in addition to lung cancer and other respiratory diseases, but also outside the respiratory system, especially in various advanced cancer often see, and is one of the signs before death. First, the pathogenesis of cancer patients before the death of wheezing, may be caused by the following circumstances, namely, lung cancer itself, other advanced cancer metastasis to the lungs or accompanied by pneumonia and other respiratory