Ethylenediamine tetraacetic acid (EDTA, boima ba limolek'hule 292) le letsoai la eona ke mofuta oa amino polycarboxylic acid, e ka khonang ho chelate calcium ions ka lisampole tsa mali, chelate calcium kapa ho tlosa calcium reaction site, e tla thibela le ho felisa coagulation e sa tloaelehang kapa e sa tloaelehang. ts'ebetso, e le ho thibela lisampole tsa mali ho tsoa ho coagulation.E sebetsa litekong tse akaretsang tsa hematology, eseng tlhahlobo ea coagulation le tlhahlobo ea tšebetso ea liplatelete, leha e le mabapi le qeto ea calcium ion, ion potassium, sodium ion, iron ion, alkaline phosphatase, creatine kinase le leucine aminopeptidase le tlhahlobo ea PCR.
Ho na le heparin kapa lithium ka har'a tube e ka matlafatsang phello ea antithrombin III inactivating serine protease, e le ho thibela ho thehoa ha thrombin le ho thibela liphello tse sa tšoaneng tsa anticoagulant.Ka tloaelo, 15iu heparin anticoagulates 1ml ea mali.Heparin tube hangata e sebelisoa bakeng sa maemo a tšohanyetso a biochemical le liteko.Ha ho hlahlojoa lisampole tsa mali, heparin sodium e ke ke ea sebelisoa ho qoba ho ama sephetho sa liteko.
Motsoako oa sodium citrate e hlokoang ke tlhahlobo ea ESR ke 3.2% (e lekanang le 0.109mol / L).Karolelano ea anticoagulant ho mali ke 1: 4.