胸腔积液(下称胸液)是临床上的常见病症,近年来,人们对其认识日益深入,若干研究工作对临床应用具有指导意义。现将其研究近况作一简介。病因引起胸液的病因繁多,按胸液之性质可分为漏出液和渗出液,前者不存在肺-胸膜疾病,后者 Pleural effusion (hereinafter referred to as pleural fluid) is a common clinical disease, in recent years, people increasingly understand their understanding, a number of research work for clinical guidance. Now its research status for a brief introduction. The cause of pleural effusion caused by many causes, according to the nature of the pleural effusion can be divided into leakage and exudate, the former does not exist pulmonary - pleural disease, the latter