测定胸腔积液pH值方法的使用情况及准确性比较。
Comparison of the use and accuracy of methods for determining pleural fluid pH.
作者信息
Chandler T M, McCoskey E H, Byrd R P, Roy T M
机构信息
Veterans Affairs Medical Center, Mountain Home, TN 37684-4000, USA.
出版信息
South Med J. 1999 Feb;92(2):214-7. doi: 10.1097/00007611-199902000-00010.
BACKGROUND
The blood gas analyzer (BGA) has been considered the "gold standard" for pleural fluid pH determination.
METHODS
We report the various methods used to measure pleural fluid pH by 277 acute care institutions who responded to a mailed questionnaire. The techniques used included the BGA (32%), dip stick or pH indicator paper (56%), and a pH meter (12%). We tested 36 consecutive exudative pleural fluid samples using each method.
RESULTS
The alternative methods were incomparable to accurately measuring pleural fluid pH by the BGA, with a mean difference of 0.16 pH unit. With a delay in testing, the pH of the pleural fluid was more alkalotic and variable, with a mean difference of 0.039 pH unit.
CONCLUSIONS
Clinicians should be encouraged to test selected samples for pleural fluid pH by the BGA when accurate measurements will influence therapy.
背景
血气分析仪（BGA）一直被视为测定胸腔积液pH值的“金标准”。
方法
我们报告了277家急症护理机构对邮寄问卷的回复中所使用的测量胸腔积液pH值的各种方法。所使用的技术包括BGA（32%）、试纸或pH指示纸（56%）以及pH计（12%）。我们使用每种方法对36份连续的渗出性胸腔积液样本进行了检测。
结果
替代方法与通过BGA准确测量胸腔积液pH值无法相比，平均差异为0.16个pH单位。随着检测延迟，胸腔积液的pH值更偏碱性且变化更大，平均差异为0.039个pH单位。
结论
当准确测量结果会影响治疗时，应鼓励临床医生通过BGA对选定的胸腔积液样本进行pH值检测。
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