Uhlaka lwaleli thuluzi lwenziwe ngensimbi .Imodeli yimodeli yinhle, futhi ine-Izinzuzo zevolumu elincane, isisindo esiphansi, umthamo omkhulu, umsindo ophansi, ukusebenza kahle kakhulu futhikanjalo. Ingasetshenziswa ezibhedlela nasezibhedlela ze-biochemical zokuhlaziywa kwezimo zei-serum, urea ne-plasma.