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对于胸水,首先应鉴别它是渗出液或漏出液。比重与蛋白含量仍是传统常用的指标。1977年 Briggs 报道使用折射计测定比重,不受温度影响,仅0.2ml 胸水就可测定。折射指数与胸水蛋白含量旦线性关系,因此也可用比重推算蛋白含量,但应用折射计时,比重与蛋白含量的关系与液体比重计不同。采用液体比重计测定胸水时,比重1.016相当于含蛋白3g%,比重每增减0.003,约相当于胸水蛋白含量增或减1g%。例如比重为1.022,相当于含蛋白 5g%(Paddock,1941)。采用折射计时,胸水比重1.020相当于含蛋白3g%,比重每增
For pleural fluid, it should first be identified as exudate or leakage fluid. Proportion and protein content is still a commonly used indicator. In 1977 Briggs reported using a refractometer to determine the specific gravity, not affected by temperature, only 0.2ml pleural fluid can be measured. The refractive index and the protein content of the pleural fluid has a linear relationship, it can also be used to calculate the proportion of protein content, but the application of refractive time, the relationship between specific gravity and protein content and hydrometer different. Hydrometer hydrometer determination of hydrothorax, the proportion of 1.016 is equivalent to containing protein 3g%, the proportion of 0.003 each increase or decrease, equivalent to approximately or minus 1g% increase in protein content of the pleural effusion. For example, the specific gravity is 1.022, which corresponds to 5 g% protein (Paddock, 1941). Refractive index, the proportion of pleural effusion 1.020 equivalent to protein 3g%, the proportion of each increase