胸腔积液(以下简称胸水)是临床上常见的一种征象,是呼吸系统疾病常见的重要体征,多数患者可以明确胸水的性质,但文献报告约有20%的胸水病例虽经各种检查,仍不能确诊,因此对胸水开展各种有关检查,以期弄清其性质,为提供临床的诊断依据,是很重要的课题,近年已作了许多研究工作,取得很大的进展,现介绍实用价值较大的实验室检查。 Pleural effusion (hereinafter referred to as pleural effusion) is a common clinical signs, is an important respiratory disease common signs, most patients can clarify the nature of pleural effusion, but the literature reported about 20% of pleural effusion despite various tests, Still can not be diagnosed, so carry out various tests on the pleural effusion, in order to clarify its nature, to provide a basis for clinical diagnosis is an important issue, in recent years has made a lot of research work, made great progress, is to introduce practical value Larger laboratory tests.