肝素浓度,一次性注射器气密性对血气,电解质测定结果的影响

目的：探讨肝素浓度、一次性注射器气密性对血气、电解质测定结果的影响。方法：用一次性注射器及两种肝素浓度检测同一患者动脉血标本，比较血气、电解质测定结果及即时测定和１５ｍｉｎ后测定的血气结果。结果：抗凝肝素浓度高时（每ｍｌ血标本含肝素５１２Ｕ），ｐＨ、ＰａＯ２、Ｎａ＾＋、Ｃｌ、Ｃａ＾２＋、ｎＣａ＾２＋均较低（Ｐ〈０．０１），而Ｋ＾＋偏高（Ｐ〈０．０１）；标本放置１５ｍｉｎ后测定ＰａＯ２明显上升（Ｐ〈

Effects of heparin concentration and syringe seal feature on blood gas and electrolyte measurements

Objective The concentration of heparin in blood sample and seal feature of syringe effect on blood gasand electrolyte measurements were observed. Methods With two concentrations of heparin and plastic syringe,eletrolytes and blood gas were measured at the same time,and blood gases were analyzed immediately and l5 min-utes after blood samples obtained. Results When concentration of heparin in sample were high (containing 512 Uheparin per milliliter blood sample),measured pH, PaO2, Na , Cl-, Ca2 and nCa2 were all significantly de-creased (P<0. 01),but K increased (P<0. 01). When blood gas analysis were measured after delayed l5 min-utes, PaO2 was greatly increased (P<0. 05) and PaCO2 was greatly decreased (P<0. 01). Conclusions When theconcentration of heparin in Per milliliter blood sample is 10 U,the measured blood gas and electrolytes are cor-rect. The seal feature of plastic syringe is poor, the result of blood gas will be affected.