Objective Blood coiiection needie thickness of arterial blood gasanalysis on the impact. Method Selected from December 2010 to June 2011, 100 cases of non-intensiwe care units of blood circulation disorders of the radial artery in patients with cancer, someone has to use the ipsilateral radial artey thickness ranging from two manufacturers BD needles were collected arterial blood arterial blood. Result Thickness of two kinds of blood collection needles using the pH, PCO2, PO2, LAC, BE equivalents little difference, the difference was not statistically significant (P>0.05). Conclusion Needle thickness accuracy of the results of blood gas analysis is not affected.%目的：采血针头粗细对动脉血气分析结果的影响。方法选用2010年12月至2011年6月期间100例重症监护室内的无桡动脉血液循环障碍的肿瘤患者，专人先后于同侧桡动脉采用粗细不等的两种X厂家动脉采血针分别采集动脉血。结果采用粗细两种针头采血的pH、PCO2、PO2、LAC和BE值差异无统计学意义（P＞0.05）。结论针头粗细对血气分析结果无影响。
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