Uhlaka lwale nsimbi lwenziwe ngensimbi. Imodeli yayo yinhle, futhi ine-izinzuzo zevolumu encane, isisindo esiphansi, umthamo omkhulu, umsindo ophansi, ukusebenza kahle okuphezulu kanyenjalo njalo. Ingasetshenziswa ezibhedlela nasema-lab e-biochemical ukuze kuhlaziywe ikhwalithi ye-i-serum, i-urea kanye ne-plasma.