Effect of Different Blood Collection Tubes on Evaluated Potassium Test

Omar Aljumaili


Accurate laboratory testing requires an understanding of the interactions between blood samples and collection tubes, which can absolutely affect the precise of laboratory test results and that influence in the diagnosis of disease. Potassium is an essential electrolyte that plays important roles in blood pressure, nerve system, kidney failure and cardiovascular diseases. The aim of the study is to investigate the effect of different blood collection tubes on potassium test also to minimized interference in a clinical assay. 10 ml blood collected without tourniquet from twenty healthy male volunteers with age 19 - 32 years and divided the blood into five major different tubes (a) White tube without any additive as a standard  (B) two types of gel separator tubes with clot activator. Type one (SSGT Vacuum Lab) and type two (SSGT marked ALS) (C) K2EDTA tube (D) Sodium citrate tube. (E) Lithium heparin tube. The results show that no significant change results in gel tube type-1 (SSGT vacuum lab sodium citrate and lithium heparin tubes comparing with the White tube, while there are significant decreases in gel tubes typs2 (SSGT marked ALS) comparing with the standard tube,  furthermore, there are significant increases in K2EDTA tube. The conclusion of this work is not recommended for Gel tubes and EDTA while, the white tube is the best choice, furthermore can use a heparin and sodium citrate when we use plasma to measure the potassium level.

Keywords: Accurate laboratory tests, Potassium level, Blood collection tubes, Potassium test


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