ABSTRACT
Objective] To study the effect of different placed time for vacutainer and specimen on the results of emergency electrolyte detection . [ Methods] With heparin lithium anticoagulation tube and common coagulation vacuum tube , electrolytes were detected at 30 minutes,one hour and two hours af-ter extracting blood . [ Results] At 30 minutes and one hour after extracting blood ,the levels of K +and Na+of the plasma group were significantly lower than those of the serum group (P<0.05).With the ex-tension of specimen placed time , the levels of K +and Na +of the plasma group were becoming higher than those previously ,and at two hours the difference had statistical significance ( P<0 .05 ) .There was not ob-vious difference found in the levels of K +, Na +and Cl -of the serum group at different placed times ( P>0.05).But the levels of CO2 of both the plasma group and the serum group were significantly lower than those previously with the extension of specimen placed time , and the difference had statistical significance (P<0.05). [Conclusion] It is indicated that the using of different vacutainers effects electrolyte de-tection.With the extension of specimen placed time , the levels of K +and Na +of the plasma group increase gradually , and the levels of CO 2 of the plasma group and the serum group both decrease gradually .