Coagulation tube is added with coagulant, activating thrombin and converting the soluble fibrinogen into non-soluble fibrin polymer, which further become fibrin aggregates. Coagulation tube is used for rapid biochemical analysis in the emergency setting. Our coagulation tube also contains blood glucose stabilizer and replaces the traditional blood glucose anti-coagulation tube. Thus, no anti-coagulation agent such as sodium fluoride/potassium oxalate or sodium fluoride/heparin sodium is needed for the tests of blood glucose and glucose tolerance. Blood glucose is a routine test item in the blood biochemical analysis, however, blood glucose level cannot be stabilized in regular tubes for biochemical testing. Adding blood glucose stabilizer effectively prevents in vitro blood glucose decline without affecting other biochemical tests.