胸腔积液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。其形成原因可由胸膜的炎症、结缔组织疾病、肿瘤、局部瘀血及全身性疾病引起胸膜毛细血管的体液渗出和胸膜小静脉与淋巴管的再吸收间的平衡失调。胸水的性质对于疾病的诊断、治疗及推测预后有很重要的临床价值,近年来实验室检查取得了很大的进展,下面介绍鉴别胸腔积液性质比较有价值的实验室检查。 Pleural effusion is a common clinical signs, is an important respiratory disease common signs. Its formation may be due to pleural inflammation, connective tissue disease, cancer, local blood stasis and systemic diseases caused by pleural capillary leakage of fluid and pleural venules and lymphatic reabsorption imbalance between. The nature of pleural effusion for the diagnosis of the disease, treatment and prognosis of prognosis have important clinical value, laboratory tests in recent years made great progress, the following describes the identification of pleural effusion more valuable laboratory tests.