Ethylenediamine tetraacetic acid (EDTA, molecular yuag 292) thiab nws cov ntsev yog ib yam ntawm cov amino polycarboxylic acid, uas muaj peev xwm ua tau zoo chelate calcium ions nyob rau hauv cov ntshav kuaj, chelate calcium los yog tshem tawm cov calcium qhov chaw, uas yuav thaiv thiab txiav lub endogenous los yog exogenous coagulation. txheej txheem, thiaj li tiv thaiv cov ntshav kuaj los ntawm coagulation.Nws muaj feem xyuam rau kev kuaj hematology dav dav, tsis yog rau kev kuaj coagulation thiab platelet kev ua haujlwm, lossis kev txiav txim siab ntawm calcium ion, potassium ion, sodium ion, hlau ion, alkaline phosphatase, creatine kinase thiab leucine aminopeptidase thiab PCR test.