The accuracy of arterial blood gas analysis in detecting electrolytes and anionic gap in ICU patients
10.3760/cma.j.jssn.1673-4904.2017.03.014
- VernacularTitle:动脉血气分析检测ICU患者的电解质及阴离子间隙结果准确性探讨
- Author:
Li HAN
;
Hui ZHANG
;
Yan KANG
- Keywords:
Blood gas analysis;
Electrolytes;
Anions;
Intensive care units;
Retrospective studies
- From:
Chinese Journal of Postgraduates of Medicine
2017;40(3):240-243
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the accuracy of bedside arterial blood gas analyzer in detecting electrolytes and anionic gap (AG) in ICU patients, and compare it with auto-analyzer. Methods Results of blood sodium, potassium, chlorine, bicarbonate ions and AG measured by arterial blood gas analyzer and auto- analyzer of 376 ICU adult patients admitted to ICU were retrospectively analyzed. With the outcomes of auto-analyzer as standard, the correlation and difference of electrolytes and AG measured by 2 methods were analyzed. Results The sodium, potassium, chlorine and AG measured by auto-analyzer were 121 - 183 mmol/L, 2.13 - 6.77 mmol/L, 86 - 146 mmol/L and 1 - 62 mmol/L. The blood sodium, potassium, chlorine and AG measured by arterial blood gas analyzer were 114 - 180 mmol/L, 1.78 - 6.36 mmol/L, 94 - 150 mmol/L, -7 - 40 mmol/L. The blood sodium, potassium and AG measured by arterial blood gas analyzer were lower than those measured by auto-analyzer, but the blood chlorine was higher than that measured by auto- analyzer. There were statistical differences in the difference of low, normal and high electrolytes and AG between 2 methods (P<0.01). Conclusions The electrolytes and AG measured by arterial blood gas analyzer and auto-analyzer are significantly different, and the electrolytes measured by arterial blood gas analyzer are unreliable to calculate AG.
