The pherese test tube ke mohale oa tlhahlobo ea hematology system, hobane ethylenediaminetetraacetic acid (EDTA) e ka har'a eona e ka chelate li-ion tsa calcium ka sampuli ea mali, ea tlosa calcium sebakeng sa karabelo, ea thibela le ho emisa ts'ebetso ea endogenous Or extrinsic coagulation. ho thibela ho kopana ha mohlala, empa ho ka etsa hore li-lymphocyte li hlahe li-nuclei tse bōpehileng joaloka lipalesa, hape li ka susumetsa ho kopana ha liplatelete tse itšetlehileng ka EDTA.Ka hona, e ke ke ea sebelisoa bakeng sa liteko tsa coagulation le liteko tsa tšebetso ea platelet.Ka kakaretso, re khelosa le ho kopanya mali hang ka mor'a pokello ea mali, 'me mohlala o boetse o hloka ho tsoakoa pele ho tlhahlobo,' me ha o khone ho ba centrifuged.