Boyd R, Leigh B, Stuart P
Emergency Department, Lyell McEwin Hospital, Haydown Road, Elizabethvale 5112, South Australia.
Emerg Med J. 2005 Mar;22(3):177-9. doi: 10.1136/emj.2003.011619.
To determine the mean difference and correlation between capillary and venous bedside glucose estimation in comparison to laboratory blood glucose analysis in emergency department (ED) patients.
Blood glucose levels were synchronously analysed using a bedside blood glucometer on capillary and venous derived samples from consenting ED patients aged >12 years. The venous sample was sent for comparative testing using a laboratory based multichannel analyser. Mean difference and correlation coefficients were determined.
A total of 20 subjects (aged 13-88 years) were enrolled, with 100% data capture. The mean laboratory glucose was 7.075 mmol/l. The mean capillary blood glucose was 7.66 mmol/l (mean difference compared with mean laboratory glucose 0.58 mmol/l; 95% confidence interval 0.3 to 0.9). The mean venous derived blood glucometer glucose was 7.99 mmol/l (mean difference compared with mean laboratory glucose 0.91 mmol/l; 95% CI 0.6 to 1.2). The correlation coefficient for the laboratory blood glucose versus the capillary blood glucometer glucose was 0.97 mmol/l (p<0.001). The correlation coefficient for the laboratory blood glucose and the venous blood glucometer glucose was 0.96 (p<0.001). Variation occurred between the glucometer and the laboratory blood glucose results.
There is a small but significant difference in the blood glucose results analysed on a bedside glucometer when the samples are taken from capillary or venous sources. Although good correlation is the norm between venous and capillary derived samples, caution must be exercised in accepting the results as equivalent or using either as substitutes for a laboratory blood glucose result.
确定急诊科（ED）患者中，与实验室血糖分析相比，毛细血管和静脉床边血糖估计值之间的平均差异及相关性。
使用床边血糖仪，对年龄大于12岁的同意参与研究的ED患者的毛细血管和静脉血样进行同步血糖水平分析。静脉血样被送去使用基于实验室的多通道分析仪进行对比检测。确定平均差异和相关系数。
共纳入20名受试者（年龄13 - 88岁），数据采集率为100%。实验室平均血糖为7.075 mmol/L。毛细血管平均血糖为7.66 mmol/L（与实验室平均血糖相比，平均差异为0.58 mmol/L；95%置信区间为0.3至0.9）。静脉血血糖仪平均血糖为7.99 mmol/L（与实验室平均血糖相比，平均差异为0.91 mmol/L；95%置信区间为0.6至1.2）。实验室血糖与毛细血管血糖仪血糖的相关系数为0.97 mmol/L（p<0.001）。实验室血糖与静脉血血糖仪血糖的相关系数为0.96（p<0.001）。血糖仪和实验室血糖结果之间存在差异。
当从毛细血管或静脉采集样本时，床边血糖仪分析的血糖结果存在微小但显著的差异。尽管静脉血和毛细血管血样本之间通常具有良好的相关性，但在将结果视为等同或用任何一方替代实验室血糖结果时，必须谨慎。
