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1. Chest Xray 胸片 Fluid is visible only when more than 300 ml. 胸水超過 300ml時(shí)胸片可以發(fā)現(xiàn) CT is needed in a few cases. 少數(shù)病例需做 CT Pericardial effusion 心包積液 2. Ultrasonic examination 超聲檢查 More accurate than Xrays. 診斷胸水比 X線準(zhǔn)確 Can provide vital information for thoracentesis. 能為胸腔穿刺術(shù)提供關(guān)鍵資料 3. Thoracentesis and fluid examination essential 胸腔穿刺術(shù)--診斷的關(guān)鍵 (1)Fluid routine exudate 胸水常規(guī)-滲出液 specific gravity 。 比重 WBC 500/cmm, predominated by polymorphs at early stage and lymphocytes later 白細(xì)胞計(jì)數(shù) 500/cmm, 早期以多型核細(xì)胞為主 , 以后以淋巴細(xì)胞為主 protein 3gram/dl 蛋白含量 3gram/dl (2) Acidfast staining for acidfast bacilli (not sensitive). (2)抗酸染色(不敏感) (3) Culture for tuberculous bacilli (ti