Ethylenediamine tetraacetic acid (EDTA, molecular weight 292) na nnu ya bụ ụdị amino polycarboxylic acid, nke nwere ike chelate calcium ion nke ọma na nlele ọbara, chelate calcium ma ọ bụ wepụ ebe mmeghachi omume calcium, nke ga-egbochi ma kwụsị njedebe nke endogenous ma ọ bụ exogenous coagulation. usoro, nke mere iji gbochie ihe nlele ọbara site na coagulation.Ọ dabara na ule hematology n'ozuzu, ọ bụghị maka ule coagulation na ule ọrụ platelet, ma ọ bụ na mkpebi nke calcium ion, potassium ion, sodium ion, iron ion, alkaline phosphatase, creatine kinase na leucine aminopeptidase na PCR ule.
Enwere heparin ma ọ bụ lithium n'ime tube nke nwere ike ime ka mmetụta antithrombin III na-eme ka serine protease sie ike, ka ọ ghara ime ka e guzobe thrombin ma gbochie mmetụta dị iche iche nke anticoagulant.Dịka, 15iu heparin na-egbochi 1 ml nke ọbara.A na-ejikarị tube heparin eme ihe maka biochemical na ule mberede.Mgbe ị na-enyocha ihe nlele ọbara, enweghị ike iji sodium heparin mee ihe iji zere imetụta nsonaazụ ule.
Ntinye nke sodium citrate chọrọ site na ule ESR bụ 3.2% (dakọtara na 0.109mol / L).Oke anticoagulant na ọbara bụ 1: 4.